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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 20-F

(Mark One)

☐ | REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2023

OR

☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

OR

☐ | SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of event requiring this shell company report

​

Commission File Number 001-39179

Addex Therapeutics Ltd

(Exact name of registrant as specified in its charter and translation of registrant’s name into English)

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Switzerland

(Jurisdiction of incorporation or organization)

​

Chemin des Mines 9, CH- 1202 Geneva, Switzerland

(Address of principal executive offices)

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Tim Dyer

Chief Executive Officer, Addex Therapeutics Ltd, Chemin des Mines 9,

CH- 1202 Geneva, Switzerland

Tel: + 41 22 884 1555

(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person)

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Securities registered or to be registered pursuant to Section 12(b) of the Act.

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Title of each class Trading Symbol Name of each exchange on which registered
American Depositary Shares, |  | ADXN |  | The Nasdaq Stock Market LLC
each representing 120 ordinary shares, | ​ | ​ | ​ | ​
CHF 0.01 per share | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
Shares, par value CHF 0.01 per share* | ​ | ​ | ​ | ​

* Not for trading, but only in connection with the registration of the American Depositary Shares.

​

Securities registered or to be registered pursuant to Section 12(g) of the Act. None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act. None

Table of Contents

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the Annual Report.

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Shares, par value CHF 0.01 per share: 125,195,393 shares outstanding as of December 31, 2023

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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. ☐ Yes ☒ No

​

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. ☐ Yes ☒ No

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Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ☒ Yes ☐ No

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Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). ☒ Yes ☐ No

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Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

​

​ | ​ | ​ | ​
Large accelerated filer☐ | Accelerated filer☐ | Non-accelerated filer☒ | Emerging growth company☒

​

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

​

† | The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

​

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

​

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

​

​ | ​ | ​ | ​ | ​
U.S. GAAP ☐ |  | International Financial Reporting Standards as issued |  | other☐
​ | ​ | by the International Accounting Standards Board ☒ | ​ | ​

​

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow. ☐ Item 17 ☐ Item 18

​

If this is an Annual Report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No

​

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Table of Contents

TABLE OF CONTENTS

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​ | ​ | PAGE
INTRODUCTION | 3
PART I | 6
Item 1. | Identity of Directors, Senior Management and Advisers | 6
Item 2. | Offer Statistics and Expected Timetable | 6
Item 3. | Key Information | 6
A. | [Reserved] | 6
B. | Capitalization and Indebtedness | 6
C. | Reasons for the Offer and Use of Proceeds | 6
D. | Risk Factors | 6
Item 4. | Information on the Company | 29
A. | History and Development of the Company | 29
B. | Business Overview | 30
C. | Organizational Structure | 60
D. | Property, Plants and Equipment | 60
Item 4A. | Unresolved Staff Comments | 60
Item 5. | Operating and Financial Review and Prospects | 60
A. | Operating Results | 67
B. | Liquidity and Capital Resources | 71
C. | Research and Development | 74
D. | Trend Information | 74
E. | Critical Accounting estimates | 74
Item 6. | Directors, Senior Management and Employees | 74
A. | Directors and Senior Management | 74
B. | Compensation | 78
C. | Board Practices | 83
D. | Employees | 84
E. | Share Ownership | 84
F. | Disclosure of a registrant’s action to recover erroneously awarded compensation | 84
Item 7. | Major Shareholders and Related Party Transactions | 85
A. | Major Shareholders | 85
B. | Related Party Transactions | 86
C. | Interests of Experts and Counsel | 88
Item 8. | Financial Information | 88
A. | Consolidated Statements and Other Financial Information | 88
B. | Significant Changes | 88
Item 9. | The Offer and Listing | 89
A. | Offer and Listing Details | 89
B. | Plan of Distribution | 89
C. | Markets | 89
D. | Selling Shareholders | 89
E. | Dilution | 89
F. | Expenses of the Issue | 89
Item 10. | Additional Information | 89
A. | Share Capital | 89
B. | Memorandum and Articles of Association | 89
C. | Material Contracts | 89
D. | Exchange Controls | 92
E. | Taxation | 93
F. | Dividends and Paying Agents | 102
G. | Statement by Experts | 102
H. | Documents on Display | 102

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I. | Subsidiary Information | 102
J. | Annual Report to Security Holders | 102
Item 11. | Quantitative and Qualitative Disclosures About Market Risk | 103
Item 12. | Description of Securities Other than Equity Securities | 104
A. | Debt Securities | 104
B. | Warrants and Rights | 104
C. | Other Securities | 104
D. | American Depositary Shares | 104
PART II | 107
Item 13. | Defaults, Dividend Arrearages and Delinquencies | 107
Item 14. | Material Modifications to the Rights of Security Holders and Use of Proceeds | 107
Item 15. | Controls and Procedures | 107
Item 16A. | Audit Committee Financial Expert | 108
Item 16B. | Code of Ethics | 108
Item 16C. | Principal Accountant Fees and Services | 108
Item 16D. | Exemptions from the Listing Standards for Audit Committees | 109
Item 16E. | Purchases of Equity Securities by the Issuer and Affiliated Purchasers | 109
Item 16F. | Change in Registrant’s Certifying Accountant | 109
Item 16G. | Corporate Governance | 109
Item 16H. | Mine Safety Disclosure | 110
Item 16I. | Disclosure Regarding Foreign Jurisdictions that Prevent Inspections | 110
Item 16J. | Insider Trading policies | 110
Item 16K. | Cybersecurity | 110
PART III | 111
Item 17. | Financial Statements | 111
Item 18. | Financial Statements | 111
Item 19. | Exhibits | 112

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INTRODUCTION

Unless otherwise indicated or the context otherwise requires, all references in this Annual Report on Form 20-F to the terms “Addex,” “Addex Therapeutics,” “Addex Therapeutics Ltd,” “the company,” the “Group” “we,” “us” and “our” refer to Addex Therapeutics Ltd together with its subsidiaries.

We own trademarks for Addex Pharmaceuticals in Switzerland. All other trade names, trademarks and service marks of other companies appearing in this Annual Report on Form 20-F are the property of their respective holders. Solely for convenience, the trademarks and trade names in this Annual Report on Form 20-F may be referred to without the ® and ™ symbols, but such references should not be construed as any indicator that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. We do not intend to use or display other companies’ trademarks and trade names to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

Our ADSs are traded on the Nasdaq Capital Market, or Nasdaq, under the symbol “ADXN”. Effective October 23, 2023, the ratio of ordinary shares per ADS was changed to one hundred and twenty shares per ADS. From January 29, 2020 to October 22, 2023, the ADSs traded on Nasdaq with a ratio of six shares per ADS. Unless indicated or the context otherwise requires, all per ADS amounts and numbers of ADSs in this Annual Report on Form 20-F have been retrospectively adjusted for the ADS Ratio Change.

Our reporting currency is the Swiss franc. The exchange rate between the Swiss franc and the U.S. dollar as of April 9, 2024 was USD 1.11 per CHF 1.0. We present our consolidated financial statements in accordance with International Financial Reporting Standards, or IFRS, as issued by the International Accounting Standards Board, or IASB. Readers of this Annual Report on Form 20-F should note that there may be certain differences between the presentation of our financial position, results of operations and cash flows under IFRS and U.S. generally accepted accounting principles.

The terms “dollar,” “USD” or “$” refer to U.S. dollars and the terms “Swiss francs” or “CHF” refer to the legal currency of Switzerland.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 20-F contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, that are based on our management’s beliefs and assumptions and on information currently available to our management. All statements other than present and historical facts and conditions contained in this Annual Report on Form 20-F, including statements regarding our future results of operations and financial positions, business strategy, plans and our objectives for future operations, are forward-looking statements. When used in this Annual Report on Form 20-F, the words “anticipate,” “believe,” “continue” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “ongoing,” “objective,” “plan,” “potential,” “predict,” “should,” “will” and “would,” or the negative of these and similar expressions identify forward-looking statements. Forward-looking statements include, but are not limited to, statements about:

| ● | the development of our drug candidates, including statements regarding the timing of initiation, completion and the outcome of pre-clinical studies or clinical trials and related preparatory work, the period during which the results of the studies or trials will become available and our research and development programs with respect to our drug candidates;

| ● | the impact of global macroeconomic conditions, including pandemics, heightened inflation, the U.S Federal reserve raising interest rates, bank failures and geopolitical risks, on our business and operations;

| ● | our ability to obtain and maintain regulatory approval of our drug candidates in the indications for which we plan to develop them, and any related restrictions, limitations or warnings in the label of an approved drug or therapy;

| ● | our plans to collaborate, or statements regarding the ongoing collaborations, with partner companies;

| ● | our plans to research, develop, manufacture and commercialize our drug candidates;

| ● | the timing of our regulatory filings for our drug candidates;

| ● | the size and growth potential of the markets for our drug candidates;

| ● | our ability to raise additional capital;

| ● | our commercialization, marketing and manufacturing capabilities and strategy;

| ● | our expectations regarding our ability to obtain and maintain intellectual property;

| ● | our ability to contract with third-party suppliers and manufacturers and their ability to perform adequately;

| ● | how long we will qualify as an emerging growth company or a foreign private issuer;

| ● | our estimates regarding future revenue, expenses and needs for additional financing;

| ● | our belief about the duration of our cash runway;

| ● | regulatory developments in the United States, European Union and other jurisdictions; and

| ● | other risks and uncertainties, including those listed in this section of this Annual Report on Form 20-F titled “Item 3.D—Risk Factors.”

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You should refer to the section of this Annual Report on Form 20-F titled “Item 3.D—Risk Factors” for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. As a result of these factors, we cannot assure you that the forward-looking statements in this Annual Report on Form 20-F will prove to be accurate. Furthermore, if our forward- looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

You should read this Annual Report on Form 20-F and the documents that we reference in this Annual Report on Form 20-F and have filed as exhibits to this Annual Report on Form 20-F completely and with the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward-looking statements by these cautionary statements.

This Annual Report on Form 20-F contains market data and industry forecasts that were obtained from industry publications. These data involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such estimates. We have not independently verified any third-party information. While we believe the market position, market opportunity and market size information included in this Annual Report on Form 20-F is generally reliable, such information is inherently imprecise.

This Annual Report on Form 20-F contains estimates, projections and other information concerning our industry, our business and the markets for our drug candidates. Information that is based on estimates, forecasts, projections, market research or similar methodologies is inherently subject to uncertainties, and actual events or circumstances may differ materially from events and circumstances that are assumed in this information. Unless otherwise expressly stated, we obtained this industry, business, market and other data from our own internal estimates and research as well as from reports, research surveys, studies and similar data prepared by market research firms and other third parties such as investment banking analysts, industry, medical and general publications, government data and similar sources. In addition, assumptions and estimates of our and our industry’s future performance are necessarily subject to a high degree of uncertainty and risk due to a variety of factors, including those described in the section titled “Item 3.D—Risk Factors.” These and other factors could cause our future performance to differ materially from our assumptions and estimates.

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PART I

Item 1. Identity of Directors, Senior Management and Advisers.

Not applicable.

Item 2. Offer Statistics and Expected Timetable.

Not applicable.

Item 3. Key Information.

A.[Reserved]

B. | Capitalization and Indebtedness

Not applicable.

C.Reasons for the Offer and Use of Proceeds

Not applicable.

D.Risk Factors

Our business faces significant risks. You should carefully consider all of the information set forth in this Annual Report on Form 20-F and in our other filings with the United States Securities and Exchange Commission, or the SEC, including the following risk factors which we face, and which are faced by our industry. Our business, financial condition, results of operations and growth prospects could be materially adversely affected by any of these risks. This report also contains forward-looking statements that involve risks and uncertainties. Our results could materially differ from those anticipated in these forward-looking statements, as a result of certain factors including the risks described below and elsewhere in this Annual Report and our other SEC filings. See “Special Note Regarding Forward-Looking Statements” above.

Summary Risk Factors

| ● | We will need significant amounts of additional new capital to fund our continued development activities.

| ● | We are a development-stage company working with novel approaches to therapeutics, which may not be successful.

| ● | We have no products on the market and we may never generate revenue from the sale or licensing of drug candidates.

| ● | Our dependence on Janssen to develop and commercialize ADX71149 and Indivior to develop and commercialize our GABAB PAM program exposes us to significant risks.

| ● | If third parties on which we depend to conduct our clinical trials do not perform as contractually required, fail to satisfy regulatory or legal requirements or miss expected deadlines, our clinical development program could be delayed and otherwise adversely affected.

| ● | Our ADSs may be delisted from Nasdaq which could negatively impact the price of our ADSs, our liquidity and our ability to access the capital markets.

| ● | Because we rely on third party manufacturing and supply partners, our clinical development supplies and other materials may become limited or interrupted or may not be of satisfactory quality.

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| ● | Our drug candidates must prove their efficacy and safety in rigorous clinical testing that is expensive, time-consuming and may be delayed, suspended or terminated at any time.

| ● | We face competition from entities that have developed or may develop similar or different drug candidates aimed at the indications on which we are focusing.

| ● | Any commercialization efforts by us will require us to develop sales, marketing and distribution capabilities internally or through arrangements with third parties.

| ● | The exercise of equity incentive instruments granted under our equity incentive plan or warrants granted to Investors could dilute our share capital.

| ● | We have determined that we are a “passive foreign investment company,” or PFIC, for U.S. federal income tax purposes, for which the consequences to U.S. holders of our shares or ADSs representing our shares may be adverse.

Risks Related to Our Business

We will need significant amounts of additional new capital to fund our continued development activities.

We have incurred recurring losses since inception. Although we expect to reduce our operating losses in future periods relative to prior period, we expect to generate operating losses for the foreseeable future. Our losses have resulted principally from costs incurred in research and development of our drug candidates and general and administrative expense. The amount of future losses is uncertain and our ability to achieve profitability, if ever, will depend on, among other things, us or our partners successfully developing drug candidates, obtaining regulatory approval to market and commercialize drug candidates, manufacturing any approved products on commercially reasonable terms, establishing a sales and marketing organization or suitable third party alternatives for any approved product and raising sufficient funds to finance our activities.

We will need significant amounts of additional new capital to fund our continued GABAB PAM and dipraglurant for Parkinson’s disease and post-stroke/traumatic brain injury (TBI) recovery development activities, and we cannot guarantee that we will have sufficient funds available in the future to develop and commercialize our current or future drug candidates. As of December 31, 2023, we had cash and cash equivalents of CHF 3.9 million. Between the closing date and the issuance date of our Annual Report on Form 20-F, we have raised a total of CHF 5.2 million including CHF 5.0 million from the sale of our allosteric modulator drug discovery technology platform and wholly owned preclinical programs and CHF 0.2 million under our sales agency agreement with Kepler Cheuvreux. To date, we have funded our operations through equity offerings, payments from licensors and divestment of selected assets. We have limited sources of revenue and will need substantial additional capital to develop and commercialize our drug candidates. We may be unable to raise additional capital when needed, or at all, which could force us to reduce or discontinue operations.

We believe that our current cash and cash equivalents are sufficient to fund our operating expenses through 2026. We cannot assure you of our ability to finance our operations and pursue our intended development plans beyond that date as it will depend on our ability to generate additional funding through current and further partnerships or grants and amounts we may raise through further financings such as additional equity offerings, including offerings under our sales agreements with H.C. Wainwright and Kepler Cheuvreux. If our development plans are not successful, we may not be able to generate additional funding through partnerships or grants, or raise further financing through equity offerings or otherwise, or we may only be able to do so on terms that are not favorable to our shareholders.

To the extent that we raise additional capital through the issuance of shares, our existing shareholders will be diluted and newly issued shares may contain senior rights and preferences compared to currently outstanding shares. We may receive future milestone payments from licensors but that is dependent on achieving certain regulatory or commercial milestones that may never happen. We may seek additional funding through public or private financings, debt financing or collaboration agreements. The inability to obtain funding, as and when needed, would have a negative impact on our financial condition and ability to pursue our business strategies. If we are unable to obtain the required funding to run our operations and to develop and commercialize our candidates, we could be forced to postpone the development of our drug candidates.

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We are currently conducting our business under a service agreement with Neurosterix. In order to internally develop our programs, including dipraglurant, we may need to significantly expand our operations.

On April 2, 2024, we sold our allosteric modulator drug discovery technology platform and wholly owned pre-clinical programs to Neurosterix Pharma Sàrl (Neurosterix), a new company funded by Perceptive Xontogeny Venture Fund II L.P, Perceptive Life Sciences Master fund Ltd and Acorn Bioventures 2, L.P (the “Transaction”). As part of the Transaction, Addex received CHF 5.0 million in cash and shares representing a 20% indirect equity interest in Neurosterix. As of the date of the Transaction, all employees of Addex, other than our Head of Finance, became employees of Neurosterix. Pursuant to a service agreement, certain former Addex employees, including our Chief Executive Officer, will dedicate a portion of their time to Addex. We may need to significantly expand our operations in order to continue to develop our programs. We may not be successful in expanding our operations, and any such expansion may be expensive.

We have no products on the market and we may never commercialize our drug candidates.

Our ability to achieve and sustain profitability depends on obtaining regulatory approvals for and successfully commercializing our drug candidates, either alone or with third parties, such as our partner for ADX71149, Janssen, and our partner for GABAB PAM, Indivior. Currently, none of our drug candidates have been approved for marketing and commercialization or is in Phase 3 trials. We cannot guarantee that any of our drug candidates will be successfully tested, approved by the U.S. Food and Drug Administration (FDA), the European Medicines Agency (EMA), Swissmedic, Swiss Agency for Therapeutic Products, or any other regulatory agency or marketed and commercialized at any time in the foreseeable future or at all. If approval is obtained for a drug candidate, we cannot assure you that we will be able to generate or sustain revenue from any sales due to factors such as whether the product is manufactured at a competitive cost or accepted in the market, as well as general and industry-specific local and international economic pressures. Should we progress a program for a rare disease indication with the potential for orphan drug designation, the size of the patient population for even an approved product is limited.

Our business could be adversely affected by health pandemics and geopolitical risks

Our business could be adversely affected by health epidemics and geopolitical risks in regions where we or our partners have concentrations of clinical trial sites or other business operations and could cause significant disruption in the operations of third-party manufacturers and CROs upon whom we or our partners rely. Health pandemics may pose the risk that we, employees, contractors, collaborators and our partners may be prevented from conducting certain pre-clinical tests, clinical trials or other business activities for an indefinite period of time, including due to travel restrictions, quarantines, “stay-at-home” and “shelter-in-place” orders or shutdowns that have been or may in the future be requested or mandated by governmental authorities. For example, the COVID-19 pandemic impacted and could in the future impact our business and ongoing and planning clinical trials led us or by partners, including as a result of delays or difficulties in clinical site initiation, difficulties in recruiting and retaining clinical site investigators and clinical site staff and interruption of our clinical supply chain or key clinical trial activities, such as clinical trial site monitoring, and supply chain interruptions caused by ongoing restrictions for the supply of materials for drug candidates or other materials necessary to manufacture product to conduct preclinical tests. Geopolitical risks such as Russia-Ukraine war or conflicts in the Middle East may create global security concerns including the possibility of an expanded regional or global conflict and potential ramifications such as disruption of the supply chain including research and development activities being conducted by us and our strategic partners. We and our partners rely on global networks of contract research organizations to engage clinical study sites and enroll patients, certain of which are in Russia and Ukraine. Delays in research and development activities of us and our partners could increase associated costs and, depending upon the duration of any delays, require us and our partners to find alternative suppliers at additional expense. In addition, Russia-Ukraine war has had significant ramifications on global financial markets, which may adversely impact our ability to raise capital on favorable terms or at all.

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We have been granted U.S. Orphan Drug Designation for dipraglurant for PD-LID and may seek Orphan Drug Designation for other drug candidates, and we may be unable to maintain the benefits associated with Orphan Drug Designation, including the potential for market exclusivity.

Regulatory authorities in some jurisdictions, including the United States and Europe, may designate drugs and therapeutic biologics for relatively small patient populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a drug as an orphan drug if it is intended to treat a rare disease or condition, which is generally defined as a patient population of fewer than 200,000 individuals annually in the United States, or a patient population greater than 200,000 in the United States where there is no reasonable expectation that the cost of developing the drug will be recovered from sales in the United States. In the United States, Orphan Drug Designation entitles a party to financial incentives such as opportunities for grant funding toward clinical trial costs, tax advantages and user-fee waivers. In addition, if a product that has Orphan Drug Designation subsequently receives the first FDA approval for the disease for which it has such designation, the product is entitled to orphan drug exclusivity, which means that the FDA may not approve any other applications, including a full NDA, to market the same product for the same indication for seven years, except in limited circumstances, such as a showing of clinical superiority to the product with orphan drug exclusivity or where the manufacturer is unable to assure sufficient product quantity.

We have obtained Orphan Drug Designation for dipraglurant and if we may be able to obtain Orphan Drug Designation for any of our future drug candidates in specific indications, we may not be the first to obtain marketing approval for dipraglurant or any other such drug candidates for the orphan-designated indication due to the uncertainties associated with developing pharmaceutical products. In addition, exclusive marketing rights in the United States may be limited if we seek approval for an indication broader than the orphan-designated indication or may be lost if the FDA later determines that the request for designation was materially defective or if the manufacturer is unable to assure sufficient quantities of the product to meet the needs of patients with the rare disease or condition.

Further, even if we obtain orphan drug exclusivity in the U.S. for a product, that exclusivity may not effectively protect the product from competition because different drugs or therapeutic biologics with different active moieties can be approved for the same condition. Even after an orphan product is approved, the FDA can subsequently approve the same drug or therapeutic biologic with the same active moiety for the same condition if the FDA concludes that the later drug or therapeutic biologic is safer, more effective or makes a major contribution to patient care. In Europe, we could be prevented from marketing our products if a similar medicinal product is granted orphan drug designation for the same indications that we are pursuing and obtains a marketing authorization for the same indication before we do. Once authorized, with a limited number of exceptions, neither the competent authorities of the EU member states, the EMA, or the European Commission are permitted to accept applications or grant marketing authorization for other similar medicinal products with the same therapeutic indication. Marketing authorization could also be granted to a similar medicinal product with the same orphan indication if the latter product is safer, more effective or otherwise clinically superior to the original orphan medicinal product. Orphan Drug Designation neither shortens the development time or regulatory review time of a drug or therapeutic biologic nor gives the drug or therapeutic biologic any advantage in the regulatory review or approval process. In addition, while we may seek Orphan Drug Designation for our future drug candidates, we may never receive such designations.

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Our dependence on Janssen to develop and commercialize ADX71149 and Indivior to develop and commercialize GABAB PAM drug candidates exposes us to significant risks.

Our collaboration with Janssen, Indivior and any future partner, may not be scientifically, clinically or commercially successful. We are dependent upon Janssen and Indivior, and may be dependent upon any other partners with which we may collaborate in the future, to perform and fund development activities, including clinical testing, regulatory filings and the manufacture and marketing of products. Under our collaboration and license agreements with our partners, our partners have sole responsibility for the financing and development of selected compounds through preclinical and clinical trials, as well as registration procedures and commercialization, if any, in the United States, Japan, the United Kingdom, Germany, France, Spain and Italy. Our partners have authority over all aspects of the development of selected compounds and may develop or commercialize third-party compounds with a different mechanism of action for identical use. Our role on the joint development committee formed under the collaboration and license agreement is advisory and we do not have authority to determine or veto actions. Our partners may take independent action concerning product development, marketing strategies, manufacturing and supply issues and rights relating to intellectual property. Thus, the success of ADX71149 and GABAB PAM programs for the treatment of CNS and related diseases currently depends entirely upon the efforts of Janssen and Indivior, respectively. Janssen and Indivior each have significant discretion in determining the efforts and resources it applies to the development and, if approval is obtained, commercialization and marketing of ADX71149 and GABAB PAM programs, respectively. Janssen and Indivior may not be effective in obtaining approvals in their respective fields of use, marketing any approved products or arranging for any necessary sublicense, supply, manufacturing or distribution relationships, or our partners may change their strategic focus or pursue alternative technologies in a manner that results in reduced or delayed revenue to us. Our partners have a variety of marketed products and their own corporate objectives may not be consistent with our best interests. Changes of this nature might also occur if our partners are acquired or experience changes in management. In any future disagreement with us, our partners will have significantly greater financial and managerial resources on which to draw. Any disagreement could lead to lengthy and expensive litigation or other dispute resolution proceedings as well as extensive financial and operational consequences to us and have a material adverse effect on our business, financial conditions, results of operations and prospects.

Our failure to collaborate successfully with partners may delay, impair or prevent the development or commercialization of our drug candidates.

Our business strategy requires us to enter into various forms of collaboration arrangements with other companies, licensors or licensees to research, develop and commercialize our drug candidates. We cannot assure you that we will be able to maintain our existing collaborations with Janssen and Indivior, negotiate collaboration arrangements in the future on acceptable terms with first choice partners, if at all, or that any such collaboration arrangements will be successful. To the extent that we are not able to maintain or establish such arrangements, we would be forced to seek alternatives, including undertaking drug development and commercialization activities on our own, which would increase our capital requirements and could require us to limit the scope of some or all of our other research and development activities. Under a collaboration agreement, we are likely to have limited influence over the future development or commercialization of the relevant drug candidates. Such development or commercialization may depend significantly on the efforts and activities of the collaborator. Under the terms of an agreement, a collaborator may have significant discretion in determining the efforts and resources it dedicates to the collaboration, which may change over time depending on the collaborator’s overall strategic priorities. The suspension or termination of our collaboration arrangements, the failure of our collaboration arrangements to be successful or the delay in the development or commercialization of drug candidates pursuant to collaborations could have a material adverse effect on our business, financial condition, results of operations and prospects.

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If third parties on which we depend to conduct our preclinical studies and clinical trials do not perform as contractually required, fail to satisfy regulatory or legal requirements or miss expected deadlines, our preclinical studies and clinical development programs could be delayed and otherwise adversely affected.

We rely on third party clinical investigators, contract research organizations, or CROs, clinical data management organizations, medical institutions and consultants to design, conduct, supervise and monitor preclinical studies and clinical trials in relation to our drug candidates. Because we rely on third parties and do not have the ability to conduct clinical and preclinical trials independently, we have less control over the timing, quality and other aspects of clinical trials than we would if we conducted them on our own. These investigators, CROs and consultants are not our employees and we have limited control over the amount of time and resources that they dedicate to our programs. These third parties may have contractual relationships with other entities, some of which may be our competitors, which may draw time and resources from our programs. If we cannot contract with acceptable third parties on commercially reasonable terms, or at all, or if these third parties do not carry out their contractual duties, satisfy legal and regulatory requirements for the conduct of clinical trials or meet expected deadlines, our clinical development program could be delayed or otherwise adversely affected. In all events, we are responsible for ensuring that each of our clinical trials is conducted in accordance with the general investigational plan and protocols for the trial. The FDA requires us to comply with good clinical practices for conducting, recording and reporting the results of clinical trials to assure that data and reported results are credible and accurate and that the rights, integrity and confidentiality of trial participants are protected. Our reliance on third parties that we do not control does not relieve us of these responsibilities and requirements. The third parties with which we contract might not be diligent, careful or timely in conducting our clinical trials, as a result of which the clinical trials could be delayed or unsuccessful. Any such event could have a material adverse effect on our business, financial condition, results of operations and prospects.

Because we rely on third party manufacturing and supply partners, our clinical development supplies and other materials may become limited or interrupted or may not be of satisfactory quantity.

We rely on third party manufacturing and supply partners for our research and development, preclinical studies and clinical trials. We currently do not have in-house facilities to manufacture our research and development, preclinical and clinical drug supplies. In the event that any of our suppliers, for research and development, or preclinical studies or clinical trials, fail to perform their respective obligations in terms of quality, timing or otherwise, or if our supply of such components or other materials become limited or interrupted for other reasons, we may not be able to develop or market our drug candidates on a timely and cost-competitive basis, if at all, which may have a material adverse effect on our business, financial condition, results of operations and prospects. There can be no assurance that our supply of research and development, preclinical and clinical development drugs and other materials will not be limited, interrupted, restricted in certain geographic regions or of satisfactory quality. If the suppliers that currently manufacture our clinical drug supplies cannot continue to do so, we can provide no assurance that we will be able to obtain alternative components and materials from other manufacturers of acceptable quality, or on terms or in quantities acceptable to us, or that we will not require additional components and other materials to manufacture or use our drug candidates. In addition, suppliers need to meet applicable manufacturing requirements and undergo rigorous facility and process validation tests required by regulatory authorities in order to comply with applicable regulatory standards, such as current Good Manufacturing Practices, or cGMP. We cannot provide assurance that our suppliers will comply with such requirements.

Our drug candidates may not successfully obtain regulatory approval.

Even if Phase 3 clinical trials are initiated in ADX71149 or any other product candidate and they are completed, there can be no assurance that we will receive approval from the FDA, the EMA, Swissmedic, Swiss Agency for Therapeutic Products, or any other relevant government agencies. Any approval may be delayed or may be obtained on restrictive terms. This may occur if a drug candidate does not show acceptable safety and efficacy in preclinical studies and clinical trials or otherwise does not meet applicable regulatory standards for approval or the drug candidate does not prove as effective as, or does not offer therapeutic or other improvements over, existing or future drugs used to treat the same or similar illness or conditions. Failure by us or a partner to obtain approval for drug candidates could have a material adverse effect on our business, financial condition, results of operations and prospects.

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Our drug candidates must prove their efficacy and safety in rigorous clinical testing that is expensive, time-consuming and may be delayed, suspended or terminated at any time.

Drug approval requires extensive, time consuming and expensive clinical testing to demonstrate safety, tolerability and efficacy of a drug and meet other regulatory standards for authorization to market and commercialize. The development of innovative drugs is inherently risky and the utility and success of a drug will depend on its efficacy and side effect profile for the target patient population. Preclinical studies and clinical trials are long, expensive and uncertain processes. Successful results obtained in preclinical studies and early clinical trials may not be predictive of results in later clinical trials and do not ensure that later preclinical studies or clinical trials will be successful. Clinical trials may be delayed, suspended or terminated as a result of many factors, many of which are or may be beyond our control, such as:

| ● | suspension or termination of clinical trials by regulators, institutional review boards or data safety monitoring boards;

| ● | termination due to safety issues or lack of efficacy of the drug tested;

| ● | a collaboration partner’s termination of an arrangement with us or inadequate dedication of financial or other resources towards development under an arrangement with us;

| ● | inability to enter into adequate collaboration arrangements to complete the development or commercialization and manufacturing of our drug candidates;

| ● | insufficient availability of a drug candidate in accordance with cGMP quality;or

| ● | slower than expected enrollment of patients or lack of compliance by patients.

We or a partner may be required to conduct clinical trials or other testing of drug candidates beyond those currently contemplated, in particular, if the currently contemplated trials fail to complete successfully or if the results of those trials or tests are negative or inconclusive. It may take us several years to complete this testing, if at all, and failure can occur at any stage of the process, which could delay, increase costs associated with or prevent approval or commercialization of a drug candidate. Even after approval, if any, a drug may be shown to be unsafe or not have its purported effect. As a result, we or a partner may be required to conduct additional trials or studies, be subject to fines, suspension or withdrawal of approval, drug recalls, product seizures, operating restrictions or criminal prosecution. In all such cases, our anticipated development or commercialization timelines may not be met, which could have a material adverse effect on our business, financial condition, results of operations and prospects.

We face competition from entities that have developed or may develop similar or different drug candidates aimed at the indications on which we are focusing.

The development and commercialization of drugs is highly competitive. We compete with a variety of multinational pharmaceutical companies and specialized pharmaceutical companies, including products approved for marketing and/or drug candidates under development, for each of the drug candidates and each of the indications for which we are developing our drug candidates, as well as technology being developed at universities and other research institutions. Many of our competitors have significantly greater financial, technical, manufacturing, marketing, sales and supply resources or experience than we have. Our competitors have developed, are developing or will develop drug candidates and processes that will compete with our drug candidates. Competitors may enjoy a significant competitive advantage if they are able to achieve patent protection, obtain marketing authorizations and commence commercial sales of their drugs before us. Competing drugs could present superior treatment alternatives for our targeted indications, including by being more effective, safer or convenient, and even make our drug candidates or know-how obsolete before we reach the market. In addition, competitors may sell drugs below the price level at which appropriate return for our investment in drug development is possible. As a result of these factors, we may be unable to successfully develop commercially feasible drugs and our commercial opportunities may be reduced or eliminated, and we may not be able to successfully compete. This would have a material adverse effect on our business, financial condition, results of operations and prospects.

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We may fail to obtain, maintain or enforce licenses, patents and proprietary technology.

Our success depends in part on our ability to obtain patent protection for our drug candidates and processes, preserve our trade secrets and other proprietary rights and to defend and enforce our rights against infringement in Europe, the United States and other countries. If we are unable to do so, our drugs, technologies and know-how may not provide us with a competitive advantage. The validity and breadth of claims in patent applications involve complex legal and factual questions and, therefore, involve uncertainty. We owned 10 U.S. and at least 179 foreign patents and a number of pending patent applications that cover various aspects of our technologies at the issuance date of this annual report on Form 20-F. No assurance can be given that patents based on pending patent applications or any future patent applications will be issued. We may need to refine or narrow our claims. Due to their broad scope, some of our generic compound claims may not be patentable. Other of our patent applications may not be granted if third parties have earlier filed applications for inventions covered by our pending patent applications. The scope of any patent protection we are able to obtain may not provide us with sufficient protection against competing drugs or provide competitive advantages to us. Any of the patents that have been or may be issued to us may be held invalid or unenforceable if subsequently challenged by competitors or other third parties. Furthermore, there can be no assurance that others have not developed or will not develop similar drugs, duplicate any of our drugs or design around any patents that have been or may be issued to us. Any of our granted, valid and enforceable patents will provide protection for only a limited period of time. We cannot assure that we will obtain any extensions of patent protection that are sometimes offered if certain clinical development extension application deadlines are met or that we will be successful in seeking any method of use patent. If a method of use patent is granted but product patents are not granted or expire, third parties would be able to develop products using the method in indications not covered by the method of use patent.

We may be restricted in our development and any commercialization activities by third-party patents and patent applications.

Our commercial success depends on our ability to operate without infringing third-party patents and other intellectual property or market exclusivity rights. If we are not able to do so, we may be subject to infringement actions. We may not be aware of all patents and patent applications that may impact our ability to make, use or sell our drug candidates. Other parties may have filed, or may file in the future, patent applications covering compounds or drug candidates that are similar to ours. Any such event could have a material adverse effect on our business, financial condition, results of operations and prospects. In addition, because patent applications can take many years to issue and are not published for a period of time ranging on the jurisdictions in which we applied for registration, there may be applications currently pending, unknown to us, which may later result in patents that our drug candidates or technology may infringe. Any conflicts arising from the patent rights of others could significantly reduce the scope of our patents and limit our ability to obtain meaningful patent protection. We may be required to obtain licenses to those patents or to develop or obtain alternative technology. We may not be able to obtain any such licenses on acceptable terms, or at all. Any failure to obtain such licenses could delay or prevent us from pursuing the development or commercialization, if any, of our drug candidates.

We may fail to protect our intellectual property rights, including trade secrets and know-how.

Our success depends on our ability to obtain and enforce intellectual property rights, including trade secrets and non-patentable know-how related to our allosteric modulator platform. We seek to protect or secure this intellectual property, in part, by entering confidentiality agreements with and receiving assignments from our employees, consultants, suppliers, licensees, funding partners and other contractual partners and advisers. We may not always be able to obtain these agreements or assignments. Even if we obtain these agreements or assignments, there can be no assurance that they will effectively protect our intellectual property rights or prevent improper use or disclosure of confidential information or that they will not be breached. We may not have adequate remedies for any breach of these agreements or assignments, or our trade secrets or non-patentable know-how may otherwise become known or be independently developed by competitors. In addition, these agreements or assignments may conflict with, or be subject to, the rights of third parties with which our employees, consultants, suppliers, licensees, funding partners or other contractual partners or advisers had previous employment, consulting or other relationships. Any such event could have a material adverse effect on our business, financial condition, results of operations and prospects.

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We may have to defend against or initiate lawsuits to protect our intellectual property rights.

In the future, third parties with patent claims that overlap with our intended activities may decide to sue us for monetary damages or to prevent us from manufacturing, selling or developing our drug candidates. We could also become subject to claims that we or our employees have inadvertently or otherwise used or disclosed intellectual property, trade secrets or other proprietary information of an employee’s former employer, particularly if such employer is a university or pharmaceutical company. Additionally, to protect our patent rights, we may decide to initiate lawsuits against third parties. Defending against or initiating such claims, which typically go on for years before a legal judgment or settlement is obtained, would involve significant effort and expense and could divert management’s attention from the operation of our business. Any such proceedings could involve prior art and put our patents at risk of being invalidated or interpreted narrowly and our pending patent applications at risk of not being issued. In addition, there is a risk that some of our confidential information could be compromised by disclosure in such proceedings and provide competitors with access to our proprietary information. Further, the outcome of any such proceedings may be unfavorable to us. If the manufacture, use or sale of any of our drug candidates infringes the patents, or violates other proprietary rights, of third parties, a court or settlement agreement may require us to pay actual damages and, potentially, penalties, including the other party’s attorney’s fees, which may be substantial. We could also be required to cease the development, manufacture, use and sale of drugs that infringe the patent rights of others, to expend significant resources to redesign our technology so that it does not infringe the patent rights of others, to develop or acquire non-infringing technology, which may not be possible, or to obtain licenses to the infringed intellectual property, which may not be available to us on acceptable terms or at all. We cannot guarantee that we will have sufficient financial or other resources to protect intellectual property significant to the development of our drug candidates.

Even if a product candidate receives regulatory approval, lack of market acceptance may prevent us from generating revenue from commercialization of the product.

Even if a drug candidate is approved, if we or a partner are not successful in commercializing the product, we will not generate revenue from sales. Revenue generated from an approved product depends on its successful commercialization. Many factors may impede successful commercialization, many of which are or may be beyond our or a partner’s control. These factors include the proprietary rights of third parties, including our competitors, the failure of a product to prove effective as, or offer therapeutic or other improvements over, existing or future drugs used to treat the same or similar conditions or the inability of a product to gain acceptance by patients, the medical community or third-party payors, such as insurance companies or government reimbursement programs, or the inability of produce a product in commercial quantities at an acceptable cost, or at all. Even if our drug development is successful and marketing authorization has been obtained, our ability, or our partners’ ability, to generate significant revenue will depend on the acceptance of our drugs by physicians, patients, third-party payors and the medical community. We cannot assure you that we or our partners will achieve market acceptance of our drug candidates or generate revenue once we or our partners obtain marketing authorization. The market acceptance of any of our drug candidates depends on a number of factors, including the continued demonstration of efficacy and safety in commercial use, cost-effectiveness, convenience and ease of administration, competition, marketing and distribution support, the scope of the approved uses and labeling requirements, prevalence and severity of any side effects, and adequate government or other third-party coverage or reimbursement for the cost of the drug. To the extent competitors are able to commercialize competing drugs before our drugs have achieved market approval and acceptance, we may have difficulty gaining market acceptance if physicians, patients, third- party payors and the medical community have grown accustomed to use of the competing drugs, whether or not such competing drugs are more effective or have other advantages over our drug.

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Any commercialization efforts by us will require us to develop sales, marketing, and distribution capabilities internally or through arrangements with third parties.

Sales, marketing and distribution capabilities are key elements of a successful commercialization strategy, none of which we currently have internally. If any of our product candidates are approved, we intend to market the product either directly or through other strategic alliances and distribution arrangements with third parties. To commercialize our drugs, we will need to enter into new collaborations with third parties or develop our own marketing and sales force with technical expertise and supporting distribution capability. If we decide to market our products directly, we will need to commit significant financial and managerial resources to develop a marketing and sales force with technical expertise and with supporting distribution, administration and compliance capabilities. If we rely on third parties with such capabilities to market our products, we will need to establish and maintain partnership arrangements, and there can be no assurance that we will be able to enter into third-party marketing or distribution arrangements on acceptable terms or at all. To the extent that we do enter into such arrangements, we will be dependent on our marketing and distribution partners. In entering into third-party marketing or distribution arrangements, we expect to incur significant additional expense and there can be no assurance that such third parties will establish adequate sales and distribution capabilities or be successful in gaining market acceptance for our products and services. Any factors preventing or limiting the market acceptance of our drug candidates could have a material adverse effect on our business, financial condition, results of operations and prospects. There can be no assurance that we will be able to build up our own marketing and sales organization, to attract and maintain established collaboration partners for the third-party commercialization of our drug candidates, to enter into agreements on acceptable terms for sales and marketing, if at all, or that any such collaboration arrangements will be successful. As a consequence, we would be forced to seek alternatives, redirect our resources or have to limit the scope of our research and development activities in other fields and thereby delay the launch and sales of any or all of our drug candidates, or raise new funds. Accordingly, this could have a material adverse effect on our business, financial condition, results of operations and prospects.

We may become exposed to costly and damaging liability claims and may not be able to maintain sufficient liability insurance to cover these claims.

Our business with pharmaceutical drugs entails a potential risk of substantial liability for damages, including drug liability and environmental liability, which are inherent in the development, testing and manufacturing of our drug candidates. It is always possible that a drug, even after marketing authorization, may exhibit unforeseen failures or adverse side effects. We can provide no assurance that sufficient insurance coverage will be available to us at acceptable terms, or at all, for any damages or costs in connection with any liability claims. Liability lawsuits are costly and time consuming and may divert management’s attention from their normal responsibilities. If any of our drugs were to fail or produce adverse side effects, substantial uninsured losses could result, which could have a material adverse effect on our business, financial condition, results of operations and prospects. Even where drug failures or side effects are not so serious as to warrant withdrawing the drug from the market or liability in damages, they may reduce the drug’s competitiveness or adversely affect our reputation, which could have a material adverse effect on our business, financial condition, results of operations and prospects.

We and our partners are subject to significant government regulation, including marketing authorization requirements, which could increase the cost of developing our drug candidates or delay, prevent or limit the commercialization of our drug candidates.

We and our partners are subject to extensive and rigorous governmental regulation and the applicable regulatory requirements are subject to change. Our and our partners’ research and development, preclinical studies and clinical trials, manufacturing, safety, efficacy, record-keeping, labeling, marketing, sales and distribution of our drug candidates are regulated by the EMA, the FDA, Swissmedic, Swiss Agency for Therapeutic Products, and other government agencies in countries where we are testing or intend to test and market our drug candidates. Before a clinical trial can begin, we and our partners must obtain approval from the competent national authority in the country where the trial is planned to be conducted. A favorable opinion from a competent ethics committee or an independent institutional review board on the clinical trial application is also needed. We cannot assure we or our partners will obtain authorization for further testing of drug candidates already in clinical trials or for human clinical trials of any or all of our other candidates currently in research or pre-clinical development. We, and our partners or regulatory authorities may suspend or terminate clinical trials at any time if it is thought that the participants are being exposed to unacceptable health risks. It may take us or our collaborators several years to complete this testing, and failure can occur at any stage of the process.

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The governmental regulation of development of drug candidates extends beyond clinical trials to approvals required for their sale and monitoring after sale, including safety reporting requirements, regulatory oversight of drug promotion and marketing and cGMP. A failure by us or our partners to obtain marketing authorization or a delay in obtaining and maintaining approval could damage our reputation and adversely affect the marketing of our drugs and our ability to generate revenue, which could have a material adverse effect on our business, financial condition, results of operations and prospects. In addition, marketing authorizations, if granted, may not include all uses for which we may seek to market a drug, thereby limiting the potential market for the drug. Moreover, even after marketing authorization is obtained, a marketed drug, its manufacturer and its manufacturing facilities are subject to continual review and periodic inspections by the relevant authorities. Consequently, any discovery of previously unknown problems with an approved drug, manufacturer or manufacturing facilities may result in restrictions on the drug or manufacturer, including a requirement to withdraw the drug from the market. In addition, regulatory requirements are evolving in a manner that cannot be predicted. Changes in existing regulations of EMA, FDA, Swissmedic, Swiss Agency for Therapeutic Products or other regulations or the adoption of new regulations could prevent us from obtaining or maintaining, or affect the timing of, future marketing authorizations. Changes in regulatory policy during the period of development of a drug or regulatory review may result in delays or rejections of approvals of the drug candidates. Any change in the regulations governing us could have a material adverse effect on our business, financial condition, results of operations and prospects.

Our relationships with customers, physicians and third-party payors are subject, directly or indirectly, to United States federal and state healthcare fraud and abuse laws, privacy and security laws (including health information privacy and security laws), and other healthcare laws and regulations. If we or our employees, independent contractors, consultants, commercial partners and vendors violate these laws, we could face substantial penalties.

Our current and future arrangements with healthcare professionals, principal investigators, consultants, customers (including governmental bodies) and third-party payors subject us to various federal and state fraud and abuse laws and other healthcare laws. These laws may impact, among other things, our current and future business operations, including our clinical research activities, and proposed sales, marketing and education programs and constrain the business or financial arrangements and relationships with healthcare providers and other parties through which we market, sell and distribute our products for which we obtain marketing approval. These laws include, without limitation, anti-kickback and false claims laws and regulations, data privacy and security laws, and transparency laws and regulations. Because of the breadth of these laws and the narrowness of the statutory exceptions and regulatory safe harbors available, it is possible that some of our business activities could be subject to challenge under one or more of such laws. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to substantial civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, exclusion from participating in government funded healthcare programs, such as Medicare and Medicaid, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, contractual damages, reputational harm and the curtailment or restructuring of our operations. To the extent that any of our products are sold in a foreign country, we may be subject to similar foreign laws and regulations, which may include, for instance, applicable post marketing requirements, including safety surveillance, anti-fraud and abuse laws and implementation of corporate compliance programs and reporting of payments or transfers of value to healthcare professionals.

Current healthcare laws and regulations and future legislative or regulatory changes to the healthcare system may affect our ability to sell any drugs we may develop.

Healthcare laws are subject to change, which may affect our ability to sell any product candidates for which we receive marketing and commercialization approval. In the U.S., an important potential market for our drug candidates, there have been a number of legislative and regulatory changes to the healthcare system that could affect our future results of operations. In particular, there have been and continue to be a number of initiatives at the U.S. federal and state levels that seek to reduce healthcare costs.

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Individual states in the United States have become increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access, and marketing cost disclosure and transparency measures, and designed to encourage importation from other countries and bulk purchasing. Legally-mandated price controls on payment amounts by third-party payors or other restrictions could harm our business, results of operations, financial condition and prospects. In addition, regional healthcare authorities and individual hospitals in the United States are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. This could reduce ultimate demand for our products or put pressure on our product pricing, which could negatively affect our business, results of operations, financial condition and prospects.

In addition, given recent federal and state government initiatives directed at lowering the total cost of healthcare, Congress and state legislatures will likely continue to focus on healthcare reform, the cost of prescription drugs and biologics and the reform of the Medicare and Medicaid programs. While we cannot predict the full outcome of any such legislation, it may result in decreased reimbursement for drugs and biologics, which may further exacerbate industry-wide pressure to reduce prescription drug prices. This could harm our ability to generate revenue. At the federal level, in July 2021, the Biden administration released an executive order, “Promoting Competition in the American Economy,” with multiple provisions aimed at prescription drugs. In response to Biden’s executive order, on September 9, 2021, the U.S. Department of Health and Human Services, or HHS, released a Comprehensive Plan for Addressing High Drug Prices that outlines principles for drug pricing reform and sets out a variety of potential legislative policies that Congress could pursue as well as potential administrative actions HHS can take to advance these principles. In addition, on August 16, 2022, President Biden signed the Inflation Reduction Act of 2022, or IRA, into law, which, among other things (i) directs HHS to negotiate the price of certain high-expenditure, single-source drugs and biologics covered under Medicare and (ii) imposes rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation. These provisions take effect progressively starting in fiscal year 2023. On August 29, 2023, HHS announced the list of the first ten drugs that will be subject to price negotiations, although be the Medicare drug price negotiation program is currently subject to legal challenges. It is currently unclear how the IRA will be implemented but is likely to have a significant impact on the pharmaceutical industry. In response to the Biden administration’s October 2022 executive order, on February 14, 2023, HHS released a report outlining three new models for testing by the Centers for Medicare & Medicaid, or CMS, Innovation Center which will be evaluated on their ability to lower the cost of drugs, promote accessibility, and improve quality of care. It is unclear whether the models will be utilized in any health reform measures in the future. Further, on December 7, 2023, the Biden administration announced an initiative to control the price of prescription drugs through the use of march-in rights under the Bayh-Dole Act. On December 8, 2023, the National Institute of Standards and Technology published for comment a Draft Interagency Guidance Framework for Considering the Exercise of March-In Rights which for the first time includes the price of a product as one factor an agency can use when deciding to exercise march-in rights. While march-in rights have not previously been exercised, it is uncertain if that will continue under the new framework. We expect that additional state and federal healthcare reform measures may be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare therapies. Additionally, such legislation, or similar regulatory changes, could put competitive pressure on our ability to profitably price our products, which, in turn, could adversely affect our business, results of operations, financial condition and prospects. It is also possible that other legislative proposals having similar effects will be adopted.

Further, we cannot predict the likelihood, nature, or extent of healthcare reform initiatives that may arise from future legislation or administrative action. If we or any third parties we may engage are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we or such third parties are not able to maintain regulatory compliance, our drug candidates may lose any regulatory approval that may have been obtained and we may not achieve or sustain profitability.

Certain European countries utilize reference pricing to control the prices of drugs. Use of reference pricing may increase, which could restrict the sales potential for many new drugs unless the drug can be significantly differentiated from existing drugs.

Additional governmental and regulatory proposals and health care reforms are possible. However, we are unable to forecast what additional legislation or regulation relating to the health care industry or third-party reimbursement may be enacted in the future, or what effect such legislation or regulation would have on our business. Our business could be harmed by other health care reforms that may be erected or adopted in the future, and in particular this could have a material adverse effect on the amounts that private payors will pay for drugs. As a consequence, we may not be able to realize an appropriate return on our investment in research and development and generate revenue sufficient to attain profitability, even if our drugs are approved for marketing. This could have a material adverse effect on our business, financial condition, results of operations and prospects.

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The availability and level of third-party coverage and reimbursement for our potential drugs will be uncertain, and it may be difficult to obtain or maintain expected price levels.

Our or a partner’s ability successfully to commercialize our drug candidates and to attract strategic partners for our drug candidates or future drugs will depend in part on price levels and on the extent to which reimbursement for the costs of treatment with these drug candidates will be available from government health administration authorities, private health insurers and other third-party payors, as well as government health care programs. There is significant uncertainty related to third-party payor coverage and reimbursement of newly approved products. In the United States, for example, principal decisions about reimbursement for new products are typically made by CMS and private third-party payors often follow CMS’s decisions regarding coverage and reimbursement to a substantial degree. However, one third-party payor’s determination to provide coverage for a product candidate does not assure that other payors will also provide coverage for the drug candidate. Further, no uniform policy for coverage and reimbursement exists in the United States, and coverage and reimbursement can differ significantly from payor to payor. Further, coverage policies and third-party payor reimbursement rates may change at any time. Even if favorable coverage and reimbursement status is attained, less favorable coverage policies and reimbursement rates may be implemented in the future. Governments and other third-party payors are increasingly attempting to contain health care costs, in part by challenging the price of medical drugs and services or by restricting the eligibility for reimbursement. Health care cost pressure could lead to pricing pressure which could adversely affect pricing of ADX71149, GABAB PAM and our other potential drugs. Seeking third-party reimbursement is a time-consuming and costly process, which will require us and our partners to provide scientific and clinical support for the use of each of our drug candidates to each third-party payor separately. Significant uncertainty exists as to the payment status of newly approved medical drugs. The unavailability or inadequacy of third-party reimbursement, or legislation controlling treatments or prices, could have an adverse effect on the price level and consequently the market acceptance of our drug candidates and may have a material adverse effect on our results or operations, financial condition and prospects.

Any non-compliance by us with the environmental, health and safety laws and regulations that we are subject to could result in fines, suspension of drugs research and development or cessation of our operations or civil liability.

We are subject to a variety of health, safety and environmental laws and regulations in the jurisdictions in which we operate, particularly in our research and development activities, as well as in our pre-clinical studies. These laws and regulations govern, among other things, the use, storage, handling and discharge or disposal of hazardous materials, chemicals and compounds, including wastewater discharge, air emissions and waste management, where we operate. Our research and development programs involve the controlled use of hazardous materials, chemical and biological materials and controlled pre-clinical animal studies. Although we believe that we hold all permits currently required to operate our business and otherwise comply with current laws and regulations, any failure by us to comply with present or future laws and regulations could result in fines, suspension of research and development or cessation of our operations. We, like many of our competitors, have incurred, and will continue to incur, capital and operating expenditures and other costs in the ordinary course of our business in complying with such laws and regulations in most of the jurisdictions in which we operate. We do not currently anticipate any material additional capital expenditures in respect of such regulations outside of the ordinary course of our business. However, the risk of environmental liability is inherent in our business and there can be no assurance that additional material costs of complying with environmental regulations will not arise in the future. Our research and manufacturing activities involve the use of hazardous materials. Although we believe that our safety procedures for handling and disposing of hazardous materials (including medical and biological waste) comply with relevant laws and regulations, we cannot eliminate the risk of accidental or manmade contamination, injury or damage from these materials. In the event of an accident or environmental discharge, we may be held liable for any resulting damages. We cannot assure you that the amount of our insurance coverage will be sufficient to satisfy any such damages. As a result, any such accident could have a material adverse effect on our business, financial condition, results of operation and prospects. In addition, changes to existing or future laws and regulations may result in the imposition on us of significant additional environmental, health and safety compliance costs.

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We are exposed to currency fluctuation risks and other financial risks.

For the year ended December 31, 2023, approximately 30% and 3% of our costs and revenue, respectively, were denominated in currencies other than the Swiss franc. As a result, our business is affected by fluctuations in foreign exchange rates between the Swiss franc and other currencies. A significant amount of our costs is denominated in currencies other than Swiss francs, particularly U.S. dollars, Euros and British pounds, as we source supplies, research and development, consulting and other services in several countries other than Switzerland. Our revenue is mostly denominated in Swiss Francs for the twelve-month period ending December 31, 2023. Nevertheless, we expect to receive significant amounts from currencies other than Swiss francs in the medium and long term due to agreements with milestones payable in U.S dollars or Euros. Under our agreement with Janssen, all milestone payments and royalties payable by Janssen to us are denominated in Euros. Furthermore, under our agreement with Indivior, all milestones payments and royalties payable by Indivior to us are denominated in U.S dollars whilst research funding may be denominated either in Swiss francs or U.S dollars. Since our reporting currency is the Swiss franc, we convert financial line items into Swiss francs at the applicable foreign exchange rates. We expect that a significant part of our costs will continue to be denominated in U.S. dollars, Euros or British pounds. We expect as well that a significant part of our revenue, including milestone payments and royalties, will be denominated in U.S. dollars and Euros in the medium and long term due to the agreements currently on force with Jansen and Indivior. Unfavorable fluctuations in the value of the Swiss franc compared to these other currencies could have a material adverse effect on our business, financial condition, results of operations and prospects.

We are subject to risks related to data privacy concerns, cybersecurity breaches and failure to comply with privacy regulations and security requirements relating to data.

In the ordinary course of our business we come to possess sensitive personal data, including information from clinical trials, and health data obtained in connection with reporting of adverse events. We are subject to data protection laws, privacy requirements and other regulatory restrictions in the various jurisdictions in which we operate.

Our failure to keep apprised of, and comply with, privacy, data use and security laws, standards and regulations, including, for instance, unauthorized disclosure of, or access to, data, could result in the suspension or revocation of our approvals or registrations, the limitation, suspension or termination of services or the imposition of administrative, civil or criminal penalties, including fines which may be as high as €20 million or 4% of our annual worldwide revenue (whichever is greater) for serious infringements of the EU General Data Protection Regulation that became effective in May 2018. In addition, we may obtain health information from third parties in the United States (including research institutions from which we may obtain clinical trial data) that are subject to privacy and security requirements under the Health Insurance Portability and Accountability Act of 1996, as amended, or HIPAA. Depending on the facts and circumstances, we could be subject criminal penalties, including if we knowingly obtain, use, or disclose individually identifiable health information maintained by a HIPAA covered entity in a manner that is not authorized or permitted by, HIPAA. In addition, such failure or non-compliance may cause existing or potential partners, including hospitals, physicians and patients to cease interacting with us, and could damage our reputation and brand. In addition, to the extent more restrictive laws, rules or security requirements relating to business and personal data are adopted in the future in the various jurisdictions in which we operate, such changes could have an adverse impact on our business by increasing our costs or imposing restrictions on our business processes. Accordingly, our failure to keep apprised of, and comply with, privacy, data use and security laws, standards and regulations could have a material adverse effect on our reputation, business, financial condition, results and prospects. Our financial exposure to any actual or alleged breach of such regulations or standards may either not be insured against or not fully covered through our current insurance.

Cybersecurity attacks on our servers, information systems and databases, or the third-party servers, information systems and databases on which our information is stored, could compromise the security of our data or could cause interruptions in the operations of our businesses. Notwithstanding safeguards, cybersecurity breaches, internal security breaches, physical security breaches or other unauthorized or accidental access to our servers, other information systems or databases could result in tampering with, or the theft or publication of, sensitive information or the deletion or modification of data, or could otherwise cause interruptions in our operations.

The tampering with, disruption to, or the theft or publication of, sensitive information or the deletion or modification of records held either in our systems or the systems of others to which we have access, could subject us to increased costs and exposure to litigation. The loss of confidential information could result in the payment of damages and reputational harm and have a material adverse effect on our business, financial condition, results and prospects.

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Our financial exposure from the items referenced above could either not be insured against or not fully covered through any insurance that we maintain and could have a material adverse effect on our business, financial condition, results and prospects.

Risks Related to our ADSs and Shares

An investment in our securities is speculative, and there can be no assurance of any return on any such investment.

An investment in our securities is highly speculative, and there is no assurance that investors will obtain any return on their investment. Investors will be subject to substantial risks involved in their investment, including the risk of losing their entire investment.

The market price for our shares and ADSs may be highly volatile and could decline significantly.

Our securities have a relatively small public float and may be less liquid and more volatile than securities of companies with broader public ownership. Factors affecting the market price of the securities, many of which are beyond our control, include:

| ● | trading in our shares and ADSs, and securities derivative thereof;

| ● | low daily trading volume of our securities on the SIX Swiss Exchange and/or on the Nasdaq Stock Market;

| ● | announcements by us and developments that impact our financial results, business and partners;

| ● | fluctuations in our financial position or operating results;

| ● | changes in our business strategy and operations;

| ● | changes in our senior management team or Board of Directors;

| ● | commentary by investors on the prospects for our business, the shares or ADSs on the internet and/or social media and resulting in trading of our shares or ADSs;

| ● | changes in the recommendations of securities analysts regarding us or our industry;

| ● | unusual trading in our shares or ADSs or securities derivative thereof, including pursuant to naked, or uncovered, short positions;

| ● | investor need for liquidity;

| ● | investor assessment of the valuation of us and our competitors;

| ● | fluctuations in interest rates;

| ● | price and volume of the markets where our securities trade; and

| ● | future offerings of our securities.

In addition, securities markets in general have from time to time, and in particular in recent years, experienced significant price and volume fluctuations. Such fluctuations, as well as the economic environment as a whole, can have a substantial negative effect on the market price of our securities, regardless of our operating results or our financial position. Any such broad market fluctuations may adversely affect the trading price of our securities.

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Our ADSs may be delisted from Nasdaq which could negatively impact the price of our ADSs, our liquidity and our ability to access the capital markets.

Our ADSs are currently listed on Nasdaq under the symbol “ADXN.” The listing standards of Nasdaq provide that a company, in order to qualify for continued listing, must maintain a minimum bid price of USD 1.00 and satisfy standards relative to minimum shareholders’ equity, minimum market value of publicly held shares and various additional requirements. On May 18, 2023, we received a letter from the staff of Nasdaq notifying us that, for the previous 30 consecutive business days, the bid price for our ADSs had closed below the minimum USD 1.00 bid price requirement for continued listing on Nasdaq under Nasdaq Listing Rule 5550(a)(2). In order to regain compliance, the closing bid price of our ADSs have to meet or exceed USD1.00 per ADS for at least ten consecutive business days during the 180-calendar day grace period. In order to regain compliance, we effected the ADS Ratio Change, which went effective on October 23, 2023. On November 8, 2023, we announced that we had received a written notification from the staff of Nasdaq notifying us that we had regained compliance with the continued listing rule relating to the minimum bid price requirement of USD 1.00 per ADS. In the future, we may be subject to further written notifications from Nasdaq related to non-compliance with its continued listing rules such as minimum shareholders’ equity.

The ADS Ratio Change had the same effect as a one for twenty reverse ADS split. It cannot be assured that the ADS Ratio Change will result in any sustained proportionate increase in the market price of our ADSs, which is dependent upon many factors, including the business and financial performance of the company, general market conditions, and prospects for future success, which are unrelated to the number of our ADSs outstanding. It is not uncommon for the market price of a company’s ordinary shares to decline in the period following a reverse stock split.

If Nasdaq delists our securities from trading on its exchange for failure to meet the listing standards, we and our stockholders could face significant negative consequences including:

| ● | limited availability of market quotations for our securities;

| ● | a determination that the ADSs are a “penny stock” which would require brokers trading in the ADSs to adhere to more stringent rules, possibly resulting in a reduced level of trading activity in the secondary trading market for the ADSs;

| ● | a limited amount of analyst coverage, if any; and

| ● | a decreased ability to issue additional securities or obtain additional financing in the future.

Delisting from Nasdaq could also result in other negative consequences, including the potential loss of confidence by third parties such as institutional investors and fewer business development opportunities.

If our ADSs are delisted from Nasdaq, we believe that they may be eligible to be quoted on the inter- dealer electronic quotation and trading system operated by OTC Markets Group Inc., commonly referred to as the Pink Open Market and we may also qualify to be traded on their OTCQB market (The Venture Market). These markets are generally not considered to be as efficient as, and not as broad as, Nasdaq. Selling our ADSs on these markets could be more difficult because smaller quantities of ADSs would likely be bought and sold, and transactions could be delayed. In addition, in the event our ADSs are delisted, broker-dealers have certain regulatory burdens imposed upon them, which may discourage broker-dealers from effecting transactions in our ADSs or even holding our ADSs, further limiting the liquidity of our ADSs. These factors could result in lower prices and larger spreads in the bid and ask prices for our ADSs.

We expect to continue to incur significant costs as a result of operating as a company with securities listed in the United States in addition to Switzerland, and our senior management is required to devote substantial time to new compliance initiatives and corporate governance practices.

As a company with securities listed in the United States in addition to Switzerland, and particularly after we no longer qualify as an emerging growth company, we expect to continue to incur significant legal, accounting, and other expenses. The Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of Nasdaq and other applicable securities rules and regulations impose various requirements on non-U.S. reporting public companies, including the establishment and maintenance of effective disclosure and financial controls and corporate governance practices. Our senior management and other personnel will need to continue to devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations increase our legal and financial compliance costs and make some activities more time-consuming and costly.

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Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404, we are required to furnish a report by our senior management on our internal control over financial reporting with our Annual Report to be filed with the SEC. However, while we remain an emerging growth company, we will not be required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm. To ensure compliance with Section 404, we will need to continue to dedicate internal resources, potentially engage outside consultants and adopt a detailed work plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control processes as appropriate, validate through testing that controls are functioning as documented, and implement a continuous reporting and improvement process for internal control over financial reporting. We anticipate that the process to document and evaluate our internal control over financial reporting will be both costly and challenging.

An active market may not develop or be sustained in which investors can resell ADSs.

Although our shares have traded on SIX since 2007 and ADSs representing our shares have traded on Nasdaq since January 29, 2020, we cannot predict the extent to which an active market for ADSs representing our shares will develop or be sustained on Nasdaq, or how the development of such a market might affect the market price for our shares on SIX and on Nasdaq. The price at which ADSs representing our shares trade on Nasdaq may or may not be correlated with the price at which our shares trade on SIX.

Fluctuations in the exchange rate between the U.S. dollar and the Swiss franc may increase the risk of holding the ADSs.

Our share price is quoted on SIX in Swiss francs, while the ADSs trade on Nasdaq in U.S. dollars. Fluctuations in the exchange rate between the U.S. dollar and the Swiss franc may result in temporary differences between the value of the ADSs and the value of our shares, which may result in heavy trading by investors seeking to exploit such differences. In addition, as a result of fluctuations in the exchange rate between the U.S. dollar and the Swiss franc, the U.S. dollar equivalent of the proceeds that a holder of the ADSs would receive upon the sale in Switzerland of any shares withdrawn from the depositary receipts facility, and the U.S. dollar equivalent of any cash dividends paid in Swiss francs on our shares represented by the ADSs, could also decline.

Future sales, or the possibility of future sales, of a substantial number of ADSs representing our shares or our shares could adversely affect the price of such securities.

Future sales of a substantial number of ADSs representing our shares or our shares, or the perception that such sales will occur, could cause a decline in the market price of ADSs representing our shares and our shares. As of February 29, 2024, we had 128,257,059 outstanding shares, including 56,097,437 treasury shares indirectly held through our wholly-owned subsidiary Addex Pharma SA. Of these 128,257,059 outstanding shares, 26,835,840 are in the form of 223,632 ADSs. All of our outstanding shares and ADSs representing our shares are freely tradeable on SIX and Nasdaq respectively. In addition, other than shares held by our affiliates, all such shares are able to be deposited with the depositary in exchange for ADSs representing such shares at the ratio referred to on the cover page of this Annual Report on Form 20-F, which ADSs will be freely tradeable. If holders sell substantial amounts of ADSs or shares in the respective public markets therefor, or if the market perceives that such sales may occur, the market price of ADSs representing our shares and our shares and our ability to raise capital through an issue of equity securities in the future could be adversely affected. In addition, we may from time to time sell shares to the public, including pursuant to our at-the-market offering facility with H.C. Wainwright & Co., or our sale agency agreement with Kepler Cheuvreux.

We have never paid dividends on our share capital, and we do not anticipate paying cash dividends in the foreseeable future.

We have never declared or paid cash dividends on our share capital. We do not anticipate paying cash dividends on our registered shares in the foreseeable future. We currently intend to retain all available funds and any future earnings to fund the development and growth of our business. Any future determination to declare cash dividends will be made at the discretion of our board of directors, subject to compliance with applicable laws and covenants under current or future credit facilities, which may restrict or limit our ability to pay dividends and will depend on our financial condition, operating results, capital requirements, distributable profits and/or distributable reserves from capital contributions, general business conditions and other factors that our board of directors may deem relevant. As a result, capital appreciation, if any, of our securities will be your sole source of gain for the foreseeable future.

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The exercise of equity incentive instruments granted under our equity incentive plan could dilute our share capital.

Pursuant to our existing equity incentive plan, employee stock option plan, or ESOP, and warrants may be exercisable at prices below the market price of our shares at the time of exercise. To the extent that these instruments are exercised in the future, holders of our registered shares will be diluted. As of February 29, 2024, there were 69,686,088 shares reserved for issuance pursuant to subscription rights outstanding under our existing equity incentive plan, including primarily 61,676,618 warrants and 8,009,470 shares reserved for the ESOP.

Holders of ADSs may not have the same voting rights as the holders of our shares and may not receive voting materials in time to be able to exercise their right to vote.

Except as described in “Item 12.B.—Description of Securities Other than Equity Securities—American Depositary Shares”, holders of ADSs representing our shares are not able to exercise voting rights attaching to the underlying shares on an individual basis. Holders of ADSs representing our shares have appointed the depositary or its nominee as their representative to exercise the voting rights attaching to the shares underlying such ADSs. Holders of ADSs representing our shares may not receive voting materials in time to instruct the depositary to vote. The depositary may not be liable for any failure to carry out any instructions to vote, for the manner in which any vote is cast or for the effect of any such vote. As a result, holders of ADSs representing our shares may not be able to exercise voting rights and may lack recourse if such ADSs are not voted as requested. In addition, holders of ADSs representing our shares will not be able to call a shareholders’ meeting.

Holders of ADSs representing our shares may not receive distributions on our shares underlying our ADSs or any value for them if it is illegal or impractical to make them available to such holders.

The depositary for ADSs representing our shares has agreed to pay to holders of such ADSs cash dividends or other distributions that it or the custodian receives on our shares after deducting its fees and expenses. Holders of ADSs representing our shares will receive these distributions in proportion to the number of our shares underlying their ADSs. However, in accordance with the limitations set forth in the deposit agreement, it may be unlawful or impractical for the depositary to make a distribution available to holders of ADSs representing our shares. We have no obligation to take any other action to permit the distribution of ADSs representing our shares, shares themselves, rights or anything else to holders of ADSs representing our shares. This means that holders of ADSs representing our shares may not receive any distributions that we make on our shares or any value from them if it is unlawful or impractical to make such distributions available to holders. These restrictions may negatively impact the trading value of ADSs representing our shares.

Holders of ADSs may be subject to limitations on transfer of their ADSs.

ADSs are transferable on the books of the depositary. However, the depositary may close its transfer books at any time or from time to time when it deems expedient in connection with the performance of its duties. In addition, the depositary may refuse to deliver, transfer, or register transfers of ADSs generally when our books or the books of the depositary are closed, or at any time if we or the depositary deems it advisable to do so because of any requirement of law or of any government or governmental body, or under any provision of the deposit agreement, or for any other reason in accordance with the terms of the deposit agreement.

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ADSs holders may not be entitled to a jury trial with respect to claims arising under the deposit agreement, which could augur less favorable results to the plaintiff(s) in any such action.

The deposit agreement governing the ADSs representing our shares provides that holders and beneficial owners of ADSs irrevocably waive the right to a trial by jury in any legal proceeding arising out of or relating to the deposit agreement or the ADSs, including claims under federal securities laws, against us or the depositary to the fullest extent permitted by applicable law. If this jury trial waiver provision is prohibited by applicable law, an action could nevertheless proceed under the terms of the deposit agreement with a jury trial. To our knowledge, the enforceability of a jury trial waiver under the federal securities laws has not been finally adjudicated by a federal court. However, we believe that a jury trial waiver provision is generally enforceable under the laws of the State of New York, which govern the deposit agreement, by a court of the State of New York or a federal court, which have non-exclusive jurisdiction over matters arising under the deposit agreement, applying such law. In determining whether to enforce a jury trial waiver provision, New York courts and federal courts will consider whether the visibility of the jury trial waiver provision within the agreement is sufficiently prominent such that a party has knowingly waived any right to trial by jury. We believe that this is the case with respect to the deposit agreement and the ADSs. In addition, New York courts will not enforce a jury trial waiver provision in order to bar a viable setoff or counterclaim sounding in fraud or one which is based upon a creditor’s negligence in failing to liquidate collateral upon a guarantor’s demand, or in the case of an intentional tort claim (as opposed to a contract dispute), none of which we believe are applicable in the case of the deposit agreement or the ADSs. No condition, stipulation or provision of the deposit agreement or ADSs serves as a waiver by any holder or beneficial owner of ADSs or by us or the depositary of compliance with any provision of the federal securities laws. If you or any other holder or beneficial owner of ADSs brings a claim against us or the depositary in connection with matters arising under the deposit agreement or the ADSs, you or such other holder or beneficial owner may not be entitled to a jury trial with respect to such claims, which may have the effect of limiting and discouraging lawsuits against us and / or the depositary. If a lawsuit is brought against us and / or the depositary under the deposit agreement, it may be heard only by a judge or justice of the applicable trial court, which would be conducted according to different civil procedures and may augur different results than a trial by jury would have had, including results that could be less favorable to the plaintiff(s) in any such action, depending on, among other things, the nature of the claims, the judge or justice hearing such claims, and the venue of the hearing.

The rights accruing to holders of our shares may differ from the rights typically accruing to shareholders of a U.S. corporation.

We are organized under the law of Switzerland. The rights of holders of shares are governed by the laws of Switzerland and by our Articles of Association. These rights differ in certain respects from the rights of shareholders in typical U.S. corporations. See Exhibit 2.4 “Description of Ordinary Shares”, which is incorporated by reference herein for a description of the principal differences between the provisions of Swiss law applicable to us and, for example, the Delaware General Corporation Law relating to shareholders’ rights and protections.

Claims of U.S. civil liabilities may not be enforceable against us.

We are incorporated under the law of Switzerland. Certain of our directors reside outside the United States. As a result, it may not be possible for investors to effect service of process within the United States upon such persons or to enforce judgments obtained in U.S. courts against them or us, including judgments predicated upon the civil liability provisions of the U.S. federal securities laws. The United States and Switzerland do not currently have a treaty providing for recognition and enforcement of judgments (other than arbitration awards) in civil and commercial matters. Consequently, a final judgment for payment given by a court in the United States, whether or not predicated solely upon U.S. securities laws, would not automatically be recognized or enforceable in Switzerland. In addition, uncertainty exists as to whether Swiss courts would entertain original actions brought in Switzerland against us or our directors predicated upon the securities laws of the United States or any state in the United States. Any final and conclusive monetary judgment for a definite sum obtained against us in U.S. courts would be treated by the courts of Switzerland. Whether these requirements are met in respect of a judgment based upon the civil liability provisions of the U.S. securities laws, including whether the award of monetary damages under such laws would constitute a penalty, is an issue for the court making such decision. If a Swiss court gives judgment for the sum payable under a U.S. judgment, the Swiss judgment will be enforceable by methods generally available for this purpose. These methods generally permit the Swiss court discretion to prescribe the manner of enforcement. As a result, U.S. investors may not be able to enforce against us or certain of our directors, or certain experts named herein who are residents of Switzerland or countries other than the United States, any judgments obtained in U.S. courts in civil and commercial matters, including judgments under the U.S. federal securities laws.

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We are organized under the laws of Switzerland and our jurisdiction of incorporation is Plan-les-Ouates, Geneva, Switzerland. Moreover, a number of our directors and executive officers and a number of directors of each of our subsidiaries are not residents of the United States, and all or a substantial portion of the assets of such persons are located outside the United States. As a result, it may not be possible for investors to effect service of process within the United States upon us or upon such persons or to enforce against them judgments obtained in U.S. courts, including judgments in actions predicated upon the civil liability provisions of the federal securities laws of the United States. We have been advised by our Swiss counsel that there is doubt as to the enforceability in Switzerland of original actions, or in actions for enforcement of judgments of U.S. courts, of civil liabilities to the extent predicated upon the federal and state securities laws of the United States. Original actions against persons in Switzerland based solely upon the U.S. federal or state securities laws are governed, among other things, by the principles set forth in the Swiss Federal Act on International Private Law of 1987, as amended, or PILA. This statute provides that the application of provisions of non-Swiss law by the courts in Switzerland shall be precluded if the result was incompatible with Swiss public policy. Also, mandatory provisions of Swiss law may be applicable regardless of any other law that would otherwise apply.

Switzerland and the United States do not have a treaty providing for reciprocal recognition of and enforcement of judgments in civil and commercial matters. The recognition and enforcement of a judgment of the courts of the United States in Switzerland is governed by the principles set forth in the PILA. This statute provides in principle that a judgment rendered by a non-Swiss court may be enforced in Switzerland only if:

| ● | the non-Swiss court had jurisdiction pursuant to the PILA;

| ● | the judgment of such non-Swiss court has become final and non-appealable;

| ● | the judgment does not contravene Swiss public policy;

| ● | the court procedures and the service of documents leading to the judgment were in accordance with the due process of law; and

| ● | no proceeding involving the same position and the same subject matter was first brought in Switzerland, or adjudicated in Switzerland, or was earlier adjudicated in a third state and this decision is recognizable in Switzerland.

We currently qualify as a foreign private issuer and, as a result, we are not subject to U.S. proxy rules and are subject to reporting obligations under the Exchange Act, that, to some extent, are more lenient and less frequent than those of a U.S. domestic public company.

We report under the Exchange Act as a non-U.S. company with foreign private issuer status. Because we qualify as a foreign private issuer under the Exchange Act, we are exempt from certain provisions of the Exchange Act that are applicable to U.S. domestic public companies, including (i) the sections of the Exchange Act regulating the solicitation of proxies, consents, or authorizations in respect of a security registered under the Exchange Act; (ii) the sections of the Exchange Act requiring insiders to file public reports of their stock ownership and trading activities and liability for insiders who profit from trades made in a short period of time; and (iii) the rules under the Exchange Act requiring the filing with the SEC of quarterly reports on Form 10-Q containing unaudited financial and other specified information or current reports on Form 8-K, upon the occurrence of specified significant events. In addition, foreign private issuers are not required to file their Annual Report on Form 20-F until 120 days after the end of each fiscal year, while U.S. domestic issuers that are accelerated filers are required to file their Annual Report on Form 10-K within 75 days after the end of each fiscal year. Foreign private issuers also are exempt from Regulation Fair Disclosure, aimed at preventing issuers from making selective disclosures of material information. As a result of the above, you may not have the same protections afforded to shareholders of companies that are not foreign private issuers.

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As a foreign private issuer and as permitted by the listing requirements of Nasdaq, we follow certain Swiss corporate governance rules instead of certain corporate governance requirements of Nasdaq.

As a foreign private issuer, we follow certain of our home country corporate governance rules instead of certain corporate governance requirements of Nasdaq. For example, we are exempt from Nasdaq regulations that require a listed U.S. company to:

| ● | have a majority of the board of directors consist of independent directors as such term is defined by Nasdaq;

| ● | have nominating and compensations committees that are fully independent, as defined by Nasdaq;

| ● | solicit proxies and provide proxy statements for all shareholder meetings; and

| ● | seek shareholder approval for the implementation of certain equity compensation plans and issuances of shares.

For an overview of our corporate governance principles, including those which comply with certain of the requirements above, see the section titled “Description of Share Capital and Articles of Association

In accordance with our Nasdaq listing, our Audit Committee is required to comply with the provisions of Section 301 of the Sarbanes-Oxley Act of 2002 and Rule 10A-3 of the Exchange Act, both of which also are applicable to Nasdaq-listed U.S. companies. To the extent we determine to follow Swiss corporate governance practices instead of Nasdaq governance requirements applicable to domestic issuers, you may not have the same protections afforded to shareholders of companies that are subject to these Nasdaq requirements.

We may lose our foreign private issuer status, which would then require us to comply with the Exchange Act’s domestic reporting regime and Nasdaq’s corporate governance requirements applicable to a domestic issuer, and cause us to incur significant incremental legal, accounting and other expenses.

Although we currently qualify as a foreign private issuer, in order to maintain this status, as of each June either (a) a majority of our shares, including shares represented by ADSs, must be either directly or indirectly owned of record by non-residents of the United States or (b) (i) a majority of our executive officers or directors must not be U.S. citizens or residents, (ii) more than 50 percent of our assets must be located outside of the United States and (iii) our business must be administered principally outside of the United States. If we lose our status as a foreign private issuer, we would be required to comply with the Exchange Act reporting and other requirements applicable to U.S. domestic issuers, on January 1 of the succeeding year which are more detailed and extensive than the requirements for foreign private issuers. We would also be required to make changes in our corporate governance practices in accordance with various SEC and Nasdaq rules. The regulatory and compliance costs to us under U.S. securities laws if we are required to comply with the reporting requirements applicable to a U.S. domestic issuer will be significantly higher than the costs that we would incur as a foreign private issuer. As a result, we expect that the loss of foreign private issuer status would increase our legal and financial compliance costs and would make some activities highly time consuming and costly.

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We are an “emerging growth company,” and we cannot be certain if the reduced reporting requirements applicable to “emerging growth companies” will make ADSs representing our shares or our shares less attractive to investors.

We are an “emerging growth company” as defined in the JOBS Act. For as long as we continue to be an emerging growth company, we may take advantage of exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies, including not being required to comply with the auditor attestation requirements of Section 404, and, to the extent that we no longer qualify as a foreign private issuer, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation including golden parachute compensation. We may take advantage of these exemptions until we are no longer an emerging growth company. We will remain an emerging growth company until the earlier to occur of (1) the last day of the fiscal year (a) December 31, 2025, (b) in which we have total annual gross revenues of at least USD 1.235 billion or (c) in which we are deemed to be a “large accelerated filer” under the rules of the U.S. Securities and Exchange Commission, which means the market value of our common shares that is held by non-affiliates exceeds USD 700 million as of the prior June 30, and (2) the date on which we have issued more than USD 1.0 billion in non-convertible debt during the prior three-year period. We cannot predict if investors will find ADSs representing our shares or our shares less attractive because we may rely on these exemptions. If some investors find such securities less attractive as a result, there may be a less active trading market for ADSs representing our shares or our shares and the price of such securities may be more volatile.

If we fail to maintain an effective system of internal control over financial reporting, we may not be able to accurately report our financial results or prevent fraud. As a result, shareholders could lose confidence in our financial and other public reporting, which would harm our business and the trading price of ADSs representing our shares or our shares.

Effective internal controls over financial reporting are necessary for us to provide reliable financial reports and, together with adequate disclosure controls and procedures, are designed to prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting obligations. In addition, any testing by us conducted in connection with Section 404, or any subsequent testing by our independent registered public accounting firm, may reveal deficiencies in our internal controls over financial reporting that are deemed to be material weaknesses or that may require prospective or retroactive changes to our financial statements or identify other areas for further attention or improvement. Inadequate internal controls could also cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of ADSs representing our shares or our shares.

Management has been required to assess the effectiveness of our internal controls annually beginning with our Annual Report filed in 2021. However, for as long as we are an “emerging growth company” under the JOBS Act, our independent registered public accounting firm will not be required to attest to the effectiveness of our internal controls over financial reporting pursuant to Section 404. An independent assessment of the effectiveness of our internal controls could detect problems that our management’s assessment might not. Undetected material weaknesses in our internal controls could lead to financial statement restatements requiring us to incur the expense of remediation and could also result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

If securities or industry analysts do not publish research, or publish inaccurate or unfavorable research, about our business, the price of ADSs representing our shares or our shares and the trading volume thereof could decline.

The trading market for ADSs representing our shares and our shares will depend in part on the research and reports that securities or industry analysts publish about us or our business. Since we did not undertake a primary offering of ADSs representing our shares in connection with the listing of ADSs on Nasdaq, we do not anticipate that many or any industry analysts in the United States will publish such research and reports in the United States about our shares or ADSs. If no or too few securities or industry analysts commence or continue coverage on us, the trading price for ADSs representing our shares and our shares could be affected. If one or more of the analysts who may eventually cover us downgrade such ADSs or shares or publish inaccurate or unfavorable research about our business, the trading price of ADSs representing our shares or our shares would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for ADSs representing our shares or our shares could decrease, which might cause the price of such securities and the trading volume thereof to decline.

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We have determined that we are a “passive foreign investment company,” or PFIC, for U.S. federal income tax purposes, for which the consequences to U.S. holders of our shares or ADSs representing our shares may be adverse.

Based on the nature and composition of our income, assets and activities for our taxable year ended December 31, 2023, and certain assumptions with respect to the characterization of our income and assets as active or passive, we believe that we were classified as a PFIC for our taxable year ended December 31, 2023 and may be a PFIC in future taxable years. U.S. Holders should consult with their tax advisors regarding the implications of owning stock in a PFIC. However, because our PFIC status is subject to a number of uncertainties and the applicable law is subject to varying interpretations, neither we nor our tax advisors can provide any assurances with respect to our PFIC status for any prior, the current, or any future taxable year. Moreover, because the calculation of the value of our assets may be based in part on the value of our shares or ADSs, the value of which may fluctuate considerably, our PFIC status may change from year to year and is difficult to predict. A separate determination must be made after the close of each taxable year as to whether we are a PFIC for that year. As a result, our PFIC status may change from year to year and we have not yet made any determination as to our expected PFIC status for the current year. In addition, our U.S. counsel expresses no opinion with respect to our PFIC status for our taxable year ended December 31, 2023, our current or any other past or future taxable year. As we determined that we were a PFIC for our taxable year ending December 31, 2023, we intend to annually provide U.S. Holders (as defined below under the section titled “Taxation—Material U.S. Federal Income Tax Considerations for U.S. Holders” under Item 10.E.), upon request, a “PFIC Annual Information Statement”, with the information required to allow U.S. Holders to make a “qualified electing fund” election, or “QEF Election” for United States federal income tax purposes.

Under the Internal Revenue Code of 1986, as amended, a non-U.S. company will be considered a PFIC for any taxable year in which (1) 75% or more of its gross income consists of passive income or (2) 50% or more of the quarterly weighted average value of its assets consists of assets that produce, or are held for the production of, passive income. For purposes of these tests, passive income includes dividends, interest, gains from the sale or exchange of investment property and certain rents and royalties. In addition, for purposes of the above calculations, a non-U.S. corporation that directly or indirectly owns at least 25% by value of the shares of another corporation or partnership is treated as if it held its proportionate share of the assets and directly received its proportionate share of the income of such other corporation or partnership. If we are a PFIC for any taxable year during which a U.S. Holder holds our shares or ADSs representing our shares, we will continue to be treated as a PFIC with respect to such U.S. Holder in all succeeding years during which the U.S. Holder owns the shares or ADSs representing our shares, regardless of whether we continue to meet the PFIC test described above, unless the U.S. Holder makes a specified election once we cease to be a PFIC. If we are classified as a PFIC for any taxable year during which a U.S. Holder holds our shares or ADSs representing our shares, the U.S. Holder may be subject to adverse tax consequences regardless of whether we continue to qualify as a PFIC, including ineligibility for any preferred tax rates on capital gains or on actual or deemed dividends, interest charges on certain taxes treated as deferred, and additional reporting requirements. For further discussion of the PFIC rules and the adverse U.S. federal income tax consequences in the event we are classified as a PFIC, see the section titled “Taxation—Material U.S. Federal Income Tax Considerations for U.S. Holders.” under Item 10.E. Prospective U.S. Holders are strongly urged to consult their own tax advisors with respect to the impact of PFIC status on the purchase, ownership and disposition of our shares or ADSs, the consequences to them of an investment in a PFIC, any elections available with respect to our shares or ADSs and the IRS information reporting obligations with respect to the purchase, ownership and disposition of shares or ADSs of a PFIC.

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If a United States person is treated as owning at least 10% of our shares, such holder may be subject to adverse U.S. federal income tax consequences.

If a U.S. Holder is treated as owning, directly, indirectly or constructively, at least 10% of the value or voting power of our shares (directly or in the form of ADSs representing our shares), such U.S. Holder may be treated as a “United States shareholder” with respect to each “controlled foreign corporation” in our corporate group, if any. A controlled foreign corporation is any foreign corporation in which more than 50% of the total combined voting power of classes of voting stock or the total value of the corporation is owned (or treated as owned) by United States shareholders. If such group includes one or more U.S. subsidiaries, our non-U.S. subsidiaries will be treated as controlled foreign corporations, regardless of whether we are treated as a controlled foreign corporation. A United States shareholder of a controlled foreign corporation may be required to annually report and include in its U.S. taxable income its pro rata share of “Subpart F income,” “global intangible low-taxed income” and investments in U.S. property by controlled foreign corporations, regardless of whether we make any distributions. An individual that is a United States shareholder with respect to a controlled foreign corporation generally would not be allowed certain tax deductions or foreign tax credits that would be allowed to a United States shareholder that is a U.S. corporation. Failure to comply with these reporting obligations may subject a United States shareholder to significant monetary penalties and may prevent the statute of limitations with respect to such shareholder’s U.S. federal income tax return for the year for which reporting was due from starting. We cannot provide any assurances that we will assist our investors in determining whether any of our non-U.S. subsidiaries are treated as a controlled foreign corporation or whether such investor is treated as a United States shareholder with respect to any of such controlled foreign corporations. Further, we cannot provide any assurances that we will furnish to any United States shareholder information that may be necessary to comply with the reporting and tax paying obligations described in this risk factor. U.S. Holders should consult their tax advisors regarding the potential application of these rules to their investment in our shares or ADSs representing our shares.

Tax authorities may disagree with our positions and conclusions regarding certain tax positions, resulting in unanticipated costs, taxes or non-realization of expected benefits.

A tax authority may disagree with tax positions that we have taken, which could result in increased tax liabilities. A tax authority could assert that we are subject to tax in a jurisdiction where we believe we have not established a taxable connection, often referred to as a “permanent establishment” under international tax treaties, and such an assertion, if successful, could increase our expected tax liability in one or more jurisdictions. A tax authority may take the position that material income tax liabilities, interest and penalties are payable by us, in which case, we expect that we might contest such assessment. Contesting such an assessment may be lengthy and costly and if we were unsuccessful in disputing the assessment, the result could increase our anticipated effective tax rate.

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Item 4. Information on the Company.

A. | History and Development of the Company

Our legal and commercial name is Addex Therapeutics Ltd. We are a Swiss limited company organized under the laws of Switzerland. We were founded in 2002 with an indefinite duration. We are currently registered in Geneva, Switzerland. Our principal executive offices are located at Chemin des Mines 9, CH-1202 Geneva, Switzerland. Our telephone number is +41 884 1555. Investors should contact us for any inquiries through the address and telephone number of our principal executive office, or via our U.S. address at 1968 S Coast Hwy #1915, Laguna Beach, CA 92651. We maintain a website at www.addextherapeutics.com. The reference to our website is an inactive textual reference only and the information contained in, or that can be accessed through, our web site is not a part of this Annual Report on Form 20-F. The SEC maintains an Internet site that contains reports and other information that we file electronically with the SEC at www.sec.gov.

Our actual capital expenditures for the years ended December 31, 2023, 2022, and 2021 were close to nil. These capital expenditures primarily related to investments in laboratory equipment, rental deposits and to a lesser extent to computers and software.

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B. | Business Overview

Overview

We are a clinical-stage pharmaceutical company focused on the development of a portfolio of novel orally available small molecule drug candidates. Our business comprises of a pipeline of proprietary clinical and preclinical stage drug candidates that are being developed by our partners and internally. We or our partners are developing these clinical and preclinical stage proprietary drug candidates for diseases for which there are no approved therapies or where improved therapies are needed including epilepsy, Parkinson’s disease levodopa induced dyskinesia or PD-LID, post-stroke sensorimotor recovery, traumatic brain injury, or TBI, recovery, substance use disorder, or, SUD, and cough.

Allosteric modulators target a specific receptor or protein and alter the effect of the body’s own signaling molecules on their target through a novel mechanism of action. These innovative small molecule drug candidates offer several potential advantages over conventional non-allosteric molecules and may offer an improved therapeutic approach to existing drug treatments. We believe that the allosteric modulator principle has broad applicability across a wide range of biological targets and therapeutic areas.

Our lead partnered drug candidate, ADX71149 is a novel orally active metabotropic glutamate receptor subtype 2 positive allosteric modulator, or mGlu2 PAM for the treatment of epilepsy. Our partner, Janssen Pharmaceuticals, Inc., or Janssen, a subsidiary of Johnson & Johnson is conducting a placebo-controlled Phase 2a proof of concept clinical trial of ADX71149 in epilepsy patients since June 2021. Cohort 1 of the study has been completed and on November 14, 2023, we announced that the last patient had been randomized in Cohort 2. Results evaluating the efficacy, safety and tolerability of ADX71149 in combination with levetiracetam or brivaracetam from patient Cohort 1 and Cohort 2 are anticipated for the second quarter of 2024. Under our agreement with Janssen, Janssen is responsible for financing the development and commercialization, if any, of ADX71149.

Our lead wholly owned drug candidate, dipraglurant, a metabotropic glutamate receptor subtype 5 negative allosteric modulator, or mGlu5 NAM, is currently under evaluation for future development in PD-LID or post-stroke/TBI recovery. We have initiated discussions with potential partners with the objective of collaborating with them for the future development of dipraglurant:

| ● | Dipraglurant for PD-LID. We received orphan drug designation from the United States Food and Drug Administration, or FDA, for dipraglurant in PD-LID and in a 28-day Phase 2a placebo-controlled clinical trial, conducted in the United States and Europe, in patients with PD-LID, dipraglurant met its primary end point in being generally well tolerated with no clinically significant abnormalities of safety monitoring parameters occurring. In addition, at Day 1 and Day 14, dipraglurant showed statistically significant effects on PD-LID clinical symptoms, as measured using the modified abnormal involuntary movement scale, or mAIMs. However, an increasing placebo response resulted in the effect of dipraglurant on PD-LID clinical symptoms not showing statistical significance at Day 28. On June 17, 2022, we terminated our United States registration program including a pivotal Phase 2B/3 study and an open label study in PD-LID due to slow recruitment attributed to the COVID 19 global pandemic related constraints. Subject to funding or securing a development partner, we are ready to recommence a Phase 2b/3 clinical study.

| ● | Dipraglurant for post-stroke/TBI recovery. There are currently no drugs to support post-stroke/TBI recovery and current therapies rely on retraining and physiotherapy, with rehabilitation, largely partial, taking 6 month or more. Functional recovery by stimulating network connectivity in the brain with mGlu5 NAM post-stroke, has been highlighted in a recent publication in Brain and demonstrated preclinically with dipraglurant, which significantly restored functional control after just three days of once-daily treatment. We are conducting additional in vivo studies with dipraglurant in animal models of stroke and subject to funding or securing a development partner, we plan to commence a Phase 2a clinical study.There is a large unmet need in post-stroke/TBI recovery, and we believe this innovative approach represents a significant commercial opportunity.

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We are completing a funded research program to discover novel gamma-aminobutyric acid subtype-b positive allosteric modulators, or GABAB PAMs, for Indivior PLC, or Indivior. Under the terms of the agreement with Indivior, we have the right to select GABAB PAM drug candidates for a number of reserved indications, including chronic cough. This target is clinically validated with baclofen, an orthosteric agonist of GABAB, used off label to treat cough patients. However, baclofen’s use is limited by serious side-effects, short half-life and gradual loss of efficacy during chronic treatment. By more precisely targeting the GABAB receptor with a PAM we aim to have a best-in-class treatment with improved tolerability suitable for the chronic nature of this disease. This indication has a significant unmet medical need and represents a significant commercial opportunity. We are in the late clinical candidate selection phase and have demonstrated proof-of-concept in animal models of cough with several GABAB PAM compounds. We expect to select drug candidates under the agreement with Indivior at the end of Q2 2024 and subject to securing financial resources expect to start IND enabling studies.

We cannot forecast with any degree of certainty which proprietary products or indications, if any, will be subject to future collaborative arrangements, in whole or in part, and how such arrangements would affect our development plan or capital requirements. To date, we have secured grants and other funding from: The Michael J. Fox Foundation for Parkinson’s Research, or MJFF, for the development of dipraglurant for the treatment of PD-LID; the National Institute of Drug Abuse, or NIDA, to generate important data on the role of GABAB in substance use disorder and the Charcot-Marie-Tooth Association, or CMTA to evaluate the role of GABAB PAM compounds in preclinical models of CMT1A. As we advance our clinical and preclinical programs, we will continue to apply for subsidies, grants and government or agency sponsored studies that could offset or reduce our development costs.

The development and commercialization of drugs is highly competitive. We compete with a variety of multinational pharmaceutical companies and specialized pharmaceutical companies, including products approved for marketing and/or drug candidates under development, for each of the drug candidates and each of the indications for which we are developing. Furthermore, government authorities in the United States, at the federal, state and local levels, and in other countries, extensively regulate, among other things, the research, development, testing, manufacture, packaging, storage, recordkeeping, labeling, advertising, promotion, distribution, marketing, import and export of pharmaceutical products, such as those we are developing. The processes for obtaining regulatory approvals in the United States and in foreign countries, along with subsequent compliance with applicable statutes and regulations, require the expenditure of substantial time and financial resources.

The Neurosterix Transaction

On April 2, 2024, we divested our allosteric modulator discovery platform and a portfolio of pre-clinical programs to a new Swiss company, Neurosterix Pharma Sàrl (equivalent to an LLC). Neurosterix is focused on the discovery and development of novel orally available allosteric modulator drug candidates, including M4 PAM for schizophrenia, mGlu7NAM for stress related disorders and mGlu2NAM for mild neurocognitive disorders. In connection with the transaction, we received CHF 5.0 million and a 20% equity interest in Neurosterix US Holdings LLC, the sole shareholder of Neurosterix. Neurosterix received USD 63 million in initial funding from a syndicate of investors led by Perceptive Advisors.

The divestment of our discovery platform and early-stage programs includes the transfer of the associated research and development staff, with the provision of a service agreement to allow key members of staff to support us in achieving our business strategy. As of the date of the Transaction, all employees of Addex, other than our Head of Finance, became employees of Neurosterix. Pursuant to the service agreement, certain former Addex employees, including our Chief Executive Officer, will dedicate a portion of their time to Addex.

Development Portfolio

Using our drug development expertise, we have established a portfolio of clinical and preclinical programs, internally and with partners.

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Externally Developed Out-licensed Drug Candidate

ADX71149, mGlu2 PAM for the treatment of epilepsy. Our partnered drug candidate, ADX71149 is a novel orally active metabotropic glutamate receptor subtype 2 positive allosteric modulator, or mGlu2 PAM, for the treatment of epilepsy. Our partner Janssen is conducting a placebo-controlled Phase 2 proof of concept clinical trial of ADX71149 in epilepsy patients since June 2021. Cohort 1 of the study has been completed and on May 10, 2023, we announced that an IRC recommended to continue the study, following review of unblinded data from Part 1 of patient Cohort 1. On November 14, 2023, we announced that the last patient has been randomized in Cohort 2 and results evaluating the efficacy, safety and tolerability of ADX71149 in combination with levetiracetam or brivaracetam from patient Cohort 1 and Cohort 2 are anticipated for the second quarter of 2024.

Internally Developed Drug Candidates

Dipraglurant for PD-LID. We believe that, subject to regulatory approval, dipraglurant may offer an innovative and differentiated treatment approach from existing therapies. In a 28-day Phase 2a placebo-controlled clinical trial, conducted in the United States and Europe, in patients with PD-LID, dipraglurant met its primary end point in being generally well tolerated with no clinically significant abnormalities of safety monitoring parameters occurring. In addition, at Day 1 and Day 14, dipraglurant showed statistically significant effects on PD-LID clinical symptoms, as measured using the modified abnormal involuntary movement scale, or mAIMs. However, an increasing placebo response resulted in the effect of dipraglurant on PD-LID clinical symptoms not showing statistical significance at Day 28. We received orphan drug designation from the FDA, for dipraglurant in PD-LID. On June 17, 2022, we terminated our United States registration program including a pivotal Phase 2B/3 study and an open label study in PD-LID due to slow recruitment attributed to COVID 19 related constraints. Subject to funding or securing a development partner, we are ready to recommence a Phase 2B/3 clinical study.

Dipraglurant for post-stroke/TBI recovery. There is currently a large unmet need in post-stroke sensorimotor recovery as there are no drugs to support or enhance sensorimotor recovery, and current therapies rely on retraining and physiotherapy, with rehabilitation taking 6 months or more. Functional recovery by stimulating network connectivity in the brain has been demonstrated with dipraglurant which significantly restored functional control in animal studies. We are conducting further in vivo testing in stroke models, and subject to funding or securing a development partner, we plan to commence a Phase 2a clinical study.

Internal Research Programs

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GABAB PAM for the treatment of substance use disorder. Our partner, Indivior, has licensed worldwide rights to our GABAB PAM program and is responsible for all development, manufacture and commercialization of any selected GABAB PAM drug candidates. Under the agreement, we are responsible for executing a research program funded by Indivior to discover novel drug candidates. Indivior has the right to select GABAB PAM drug candidates from our research program. We are in clinical candidate selection (CCS) phase and expect IND enabling studies to be initiated in late 2024. Indivior’s primary focus is substance use disorder. We believe that substance use disorder is an indication with a significant commercial opportunity. Existing therapies often do not provide effective control of symptoms or have side effects that discourage adherence. Subject to regulatory approval, we believe that GABAB PAM may offer an innovative and differentiated treatment approach from existing therapies and provide significant benefit to patients.

GABAB PAM for the treatment and chronic cough. Our license agreement with Indivior provides for a funded research program, under which we have the right to select drug candidates for exclusive development in certain indications outside of SUD. We plan to develop our selected drug candidates in chronic cough, an indication that has been validated with baclofen, an orthosteric agonist of the GABAB receptor. We have demonstrated preclinical proof of concept of GABAB PAM in various in vivo models of cough and are in late clinical candidate selection phase. Subject to securing funding or a development partner, we plan to initiate IND enabling studies.

Introduction to Allosteric Modulation

Disease and the Role of Proteins

Proteins are complex biological molecules that have many structural and functional roles in the body. They are critical components in the lines of communication between the cells of the body known as signaling pathways. It is now recognized that signaling pathways are altered in many disease states through changes in the function of essential proteins underlying the series of cellular events required for normal biological activity. Most drug treatments are focused on modifying these biological signaling pathways by altering the activity profile of selected proteins suspected to play a key role in the manifestation of a particular disease. The major proteins targeted in drug discovery include membrane-bound receptors, such as G-protein coupled receptors, or GPCRs, or ionotropic (ion channels) receptors and enzymes.

GPCRs as Drug Targets

GPCRs are the largest family of integral membrane receptors, accounting for approximately 3-4% of the human genome. GPCRs have evolved to recognize a range of endogenous stimuli and act to transmit messages encoded in stimuli from the exterior to the interior of the cell. The ubiquitous cell surface distribution of GPCRs and their involvement in virtually all biological processes have made GPCRs extremely attractive targets for drug development. In fact, most currently marketed drugs act on GPCRs, emphasizing their importance for drug development.

Conventional Approaches to GPCR Drug Discovery

The drug discovery process involves the design of molecules that interact with a target with high specificity and efficacy. Traditional approaches to drug discovery focus on mimicking or inhibiting the actions of the endogenous activator for a target receptor. Conventionally, this has been done by the design and chemical synthesis of small molecule agonists (activators) or antagonists (inhibitors) that act in a competitive manner through interaction with the same binding site as the endogenous activator.

Competitive agonists and antagonists must have a sufficiently high affinity for the target receptor to displace the endogenous activator and must be maintained at a sufficiently high concentration in the region of the receptor in order to exert an effect. Under these conditions, agonists will induce an activated state and antagonists will induce an inactivated state, and in both states, receptors will not be responsive to natural fluctuations in the levels of endogenous activator, thereby interfering with normal physiological signaling.

Although this approach has historically yielded a number of blockbuster drugs, such as Clopidogrel, or Plavix, Salmeterol, or Serevent, and Aripiprazole, or Abilify, significant challenges remain with respect to the continued development of therapeutically useful GPCR competitive agonists or antagonists due to either lack of receptor selectivity or undesirable side effects.

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Allosteric Modulators as GPCR Drugs

In contrast to competitive orthosteric compounds, allosteric modulators of GPCRs interact with binding sites that are topographically distinct from the binding site of the endogenous activator, and therefore do not compete with the endogenous activator. This means that allosteric modulators do not activate or inhibit receptors on their own, but only in the presence of an endogenous activator do they enhance (positively modulate) or inhibit (negatively modulate) the natural physiological activity of the receptor. Consequently, allosteric modulators offer the possibility to preserve normal physiological receptor function while controlling pathologic activity caused by over- or under-activation of an endogenous receptor.

We believe that by applying this non-competitive allosteric modulator approach, we may be able to produce efficacious drug candidates with potentially beneficial properties:

| ● | Novel drug class: Allosteric modulators are a novel class of orally available small molecule drug candidates with chemical structures unrelated to that of competitive agonist or antagonist drugs and, as such, represent drug candidates with a high potential for composition of matter patent protection.

| ● | Superior receptor sub-type selectivity: The binding site for an endogenous activator is in general, highly conserved within a GPCR family and achieving receptor subtype selectivity within a family has not always been possible for competitive agonists. The best examples of this are the muscarinic acetylcholine and the metabotropic glutamate receptor families, for which developing competitive, sub-type selective agonists have not been successful thus far. In contrast, allosteric modulator binding sites, being independent of endogenous stimuli, have evolved with a much higher structural diversity than endogenous activator binding sites and consequently offer the potential for the synthesis of drug candidates with much greater sub-type selectivity.

| ● | Ability to discover small molecule drugs for a greater number of GPCR targets: Several GPCR targets are currently thought to be beyond the reach of conventional competitive drug discovery approaches due to the complexity of the interaction of the endogenous activator with the receptor; including, for example certain peptides, high molecular weight hormones and lipids. For these targets, the allosteric modulator approach represents a novel pathway to develop orally active activator or inhibitor small molecules.

| ● | Ability to re-address well characterized and clinically validated GPCR targets where the pharmaceutical industry has exhausted competitive compound drug discovery approaches: Allosteric modulator drug candidates offer a promising way to revisit these targets, providing novel small molecules while capitalizing on the existing knowledge on well-validated GPCR targets.

| ● | Improved safety: Allosteric modulators control pathologic activity while preserving natural physiological signaling activity due to their lack of effect in the absence of the endogenous activator. In addition, they show no or less tolerance to their effect when chronically administered, thereby not requiring increased dosing as is often the case with competitive compounds. Together with their superior selectivity, these allosteric modulator compounds have the potential for improved safety compared to their competitive analogs.

| ● | Clinical use in combination: Given that allosteric modulators target different binding sites to conventional agonists or antagonists, allosteric modulator drugs may find clinical utility in combination therapies for certain clinical indications.

Orally available brain penetrant small molecule drug candidates that are highly selective for their therapeutic targets and interact with their target in a modulatory manner preserving natural physiological signaling are particularly suitable for chronic diseases such as neurological ones.

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Competitive Positioning in Allosteric Modulation drug discovery

Since our inception in 2002, we have focused exclusively on allosteric modulation drug discovery and development and all our programs have been developed in house by leading experts in the field of allosteric modulation with years of experience in both industry and academia. Our lead development compound has been licensed to Janssen, a subsidiary of Johnson & Johnson, who is conducting a placebo- controlled Phase 2 proof of concept clinical trial of ADX71149, an mGlu2 PAM, in epilepsy patients since June 2021.

Our second development compound, dipraglurant, an mGlu5 NAM, is being evaluated for development for PD-LID or post-stroke/TBI sensorimotor recovery and subject to funding or securing a development partner, we plan to commence a Phase 2a clinical study.

Our GABAB Program which has been licensed to Indivior. Under the agreement, we are responsible for executing a research program funded by Indivior to discover novel drug candidates, and Indivior has the right to select GABAB PAM drug candidates from our research program. Indivior’s primary focus is substance use disorder. We have the right to select drug candidates for exclusive development in certain indications outside of SUD and plan to develop our selected drug candidates in chronic cough. We are in clinical candidate selection phase and subject to funding or securing a development partner, we plan to initiate IND enabling studies.

Our Strategy

Since our inception through December 31, 2023, we have raised an aggregate of CHF 355.2 million in equity financing and generated an aggregate of CHF 66.4 million in revenue, which we have used to discover and develop our pipeline of drug candidates. The key elements of our strategy include the following:

| ● | Continue to evaluate dipraglurant for past-stroke/TBI recovery. We are currently validating dipraglurant’s use in animal models of stroke, we have drug product ready and subject to funding or securing a development partner, plan to initiate a Phase 2B/3 clinical study.

| ● | Continue to advance our GABAB PAM research programs. We are currently completing a research program funded by Indivior to discover novel GABAB PAM drug candidates. We have the right to select drug candidates for exclusive development in certain indications such as cough. We are currently in clinical candidate selection phase and, subject to funding, we plan to initiate IND enabling studies.

| ● | Continue to pursue collaborative arrangements with other pharmaceutical companies. We are seeking collaborative arrangements with third parties to advance the development and commercialization of our drug candidates.

Externally Developed Out-licensed Product Candidate

ADX71149 for the treatment of Epilepsy

Epilepsy is one of the most common serious neurological disorders affecting about 65 million people globally (Thurman et al. 2011). It affects 1% of the population by age 20 and 3% of the population by age 75 (Holmes et al. 2008). Epilepsy describes a condition in which a person has recurrent seizures due to a chronic, underlying process. Epilepsy refers to a clinical phenomenon rather than a single disease entity, since there are many forms and causes. Epilepsy is defined by any of the following conditions: (1) at least two unprovoked (or reflex) seizures occurring >24 hours apart; (2) one unprovoked (or reflex) seizure and a probability of further seizures similar to the general recurrence risk (at least 60)% after two unprovoked seizures, occurring over the next 10 years; (3) diagnosis of an epilepsy syndrome (Fisher et al. 2014). The synaptic vesicle protein 2A, or SV2A has been identified as a broad-spectrum anti-convulsant target in models of partial and generalized epilepsy, and studies in animal models and human tissue suggest that changes in the expression of SV2A are implicated in epilepsy (Mendoza-Torreblanca et al. 2013; Kaminski et al. 2012). SV2A ligands include levetiracetam (Lynch et al. 2004), which is an anti-epileptic drug commercialized under trademark Keppra®, is approved in Europe and the United States as a monotherapy or add-on therapy in patients diagnosed with epilepsy.

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Our partnered drug candidate, ADX71149, is a novel orally active mGlu2 PAM. Our partner, Janssen, has completed Phase 1 and two Phase 2a clinical trials in schizophrenia and anxious depression, respectively. Janssen has announced that ADX71149 has been extensively profiled in preclinical models of epilepsy showing both standalone activity and in combination with SV2A ligands including Keppra. Janssen has patented the combination of mGlu2 PAM with SV2A ligands for the treatment of epilepsy and is conducting a placebo-controlled Phase 2 proof of concept clinical trial of ADX71149 in epilepsy patients since June 2021. Cohort 1 of the study has been completed and on May 10, 2023 we announced that an interim review committee, or IRC recommended to continue the study, following review of unblinded data from Part 1 of patient Cohort 1. On November 14, 2023, we announced that the last patient had been randomized in Cohort 2 and results evaluating the efficacy, safety and tolerability of ADX71149 in combination with levetiracetam or brivaracetam from patient Cohort 1 and Cohort 2 are anticipated for the second quarter of 2024.

Epilepsy is an indication with a large commercial opportunity as existing therapies frequently provide ineffective control of symptoms or have side effects that discourage adherence. We believe that, subject to regulatory approval, ADX71149 may provide a substantial benefit to patients. Under our agreement with Janssen, Janssen is responsible for, including the financing of, development and commercialization, if any, of ADX71149.

Our Internally Developed Product Candidates

Dipraglurant

Dipraglurant is a selective, orally active small molecule drug product which acts as an mGlu5 NAM. We discovered dipraglurant and hold composition of matter and polymorph patents granted in the United States, Europe and Japan. Dipraglurant is selective for mGlu5 and does not have significant activity or binding affinity to other mGlu or other CNS receptors, such as serotonin, GABA or dopamine receptors. There are currently no drugs of this class on the market. Dipraglurant is currently under evaluation for future development in a range of potential therapeutic indications including PD-LID and post-stroke /TBI recovery. We have initiated discussions with potential partners with the objective of collaborating with them for the future development of dipraglurant and, subject to funding or securing a development partner, plan to initiate clinical studies for one of these indications.

Dipraglurant for post-stroke/TBI recovery

Globally more than 100 million people have survived an ischemic stroke and this number is increasing by 5.7 million per year. In the United States there are around 800,000 strokes of different severities per year, which can lead to motor paralysis, loss of sensory function, impaired autonomic functions such as bladder/bowel control, impaired cognition leading to deficits in communication, attention and memory, and often accompanied by pain.

There are currently no drugs to support sensorimotor recovery and current therapies rely on retraining and physiotherapy, with rehabilitation, often only partial, taking 6 months or more. In the meantime, patients may require assistance in routine tasks, personal care and daily living, increasing the burden of care and the risk of the onset of other comorbidities such as depression and social inadequacy.

Following stroke, focal lesions lead to neural tissue necrosis in confined areas and the brains modular organization is disrupted causing module segregation, leading to local imbalances in excitation/inhibition. mGlu5 receptors are widely expressed in medial prefrontal, somatosensory and motor cortices of the brain. mGlu5 modulates glutamatergic neurotransmission and is involved in plastic changes in neural circuits, interfering with neuroplasticity – a key mechanism in post-stroke sensorimotor recovery. The mGlu5 receptor is also involved in aberrant synaptogenesis and neural circuit reorganization associated with several neurological disorders, including stroke. By inhibiting mGlu5 receptors with a negative allosteric modulator (NAM), we aim to support cortical reorganization and formation of new functional pathways, restoring functional connectivity changes toward pre-lesion state and excitation/inhibition homeostasis in tandem with physiotherapy.

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Functional recovery by stimulating network connectivity in the brain has been demonstrated with MTEP (an mGlu5 NAM) and resulted in a significant motor recovery of functional control (Figure below)

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Dipraglurant also significantly restored functional control in a shorter, 3-day experiment (Figure below).

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We are conducting further in vivo testing and subject to funding or securing a development partner, plan to commence a Phase 2a study.

There is a large unmet need in post-stroke/TBI recovery, and we believe this innovative approach presents a significant commercial opportunity.

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Dipraglurant for PD-LID

Parkinson’s disease is a progressive neurodegenerative disease that results in the loss of dopaminergic neurons in the substantia nigra, or SN. One consequence of the depletion of dopamine in this disease is a series of movement disorders, including bradykinesia, akinesia, tremor, gait disorders and problems with balance. Early in the course of the disease, these motor symptoms of Parkinson’s disease are effectively treated by dopamine replacement with the use of levodopa or dopamine D2 receptor agonists or monoamine oxidase B inhibitors. However, as the disease progresses, these agents become less effective in controlling motor symptoms and PD-LID often emerges.

PD-LID is involuntary movement that may affect any body area, including the face, trunk or limbs. Oral levodopa is currently the most effective treatment available for motor symptoms associated with Parkinson’s disease. However, long term levodopa use is often associated with the development of dyskinesia, which may be as disabling as the symptoms of Parkinson’s disease. Dyskinesias are comprised principally of two types of movement: chorea, which is a rapid uncontrolled movement, and dystonia, which is a slow, often painful, writhing movement.

Even though levodopa provides more effective motor symptom control than other currently available therapies, physicians tend to delay use of levodopa use for as long as possible, using dopamine agonists or monoamine oxidase B inhibitors in the early stages of the disease, due to the inexorable onset of dyskinesia onset with levodopa use. Dopamine agonists and monoamine oxidase B inhibitors become less effective as Parkinson’s disease progresses and are associated with dose limiting side effects, including Impulse Control Disorders, or ICDs, such as pathological addictions to gambling, shopping, eating or sex.

The occurrence of PD-LID is linked to the neurodegenerative process of PD and is not solely related to the duration of dopamine replacement therapy. For instance, in severe advanced stage Parkinson’s disease patients, dyskinesia can be provoked after a first high dose of levodopa. Chronic or high dose dopamine replacement treatments alone do not lead to dyskinesia, but may lower the threshold for dyskinesia occurrence following dosing, as neurodegeneration progresses. Efforts to reduce the use of high doses of levodopa or dopamine agonists, by using more frequent lower doses or extended-release formulations, can improve dyskinesias but may be at the expense of optimal motor function. In the later stages of Parkinson’s disease, the patient and physician have to balance good motor symptom control against the occurrence of levodopa-induced dyskinesia.

If dyskinesia could be effectively treated, or even delayed or eliminated, it is likely that doctors would use levodopa earlier in the treatment of Parkinson’s disease. Currently available therapies, such as amantadine and Deep Brain Stimulation, or DBS surgery, often have limited effectiveness or tolerance in patients. The response of patients varies widely to amantadine, which in its generic form is commonly used off label to treat dyskinesia. Typically, amantadine only works for some, if any, dyskinesias suffered by a patient. Amantadine often has side effects which may limit its use, and some patients do not tolerate it at all. Some of the more common side effects of amantadine include blurred vision, digestive issues, postural hypotension, dizziness, falls, ankle oedema, drowsiness, trouble sleeping, depression and psychotic symptoms. DBS surgery, a non-pharmacological treatment strategy, is used primarily for patients whose symptoms cannot be satisfactorily controlled with medications. Patients experience varied results with DBS surgery, and even patients who experience better motor symptom control with DBS surgery may have continued symptoms of dyskinesia. Furthermore, many patients are unwilling to undergo DBS surgery, since it is a costly, invasive surgical procedure that could result in complications.

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Figure 1: Pharmacokinetic profile of Dipraglurant and L-Dopa in Humans

The rapid absorption and relatively short half-life of dipraglurant in the current immediate-release, or IR, formulation is thought to be well suited for use in PD-LID. The pharmacokinetic, or PK, profile of dipraglurant (IR) mirrors that of levodopa with peak plasma concentration occurring around the same time as that of levodopa and the duration of plasma exposure covering that of the “On” period (the time when levodopa is having its effect, Figure 1). Dyskinesia occurs predominantly during the period immediately following levodopa dosing; troublesome peak-dose dyskinesia (dyskinesia which severely interferes with the patient’s daily activity) usually appears as levodopa reaches Cmax and parallels the period of maximal clinical benefit. Based on its similar PK profile, dipraglurant is expected to optimally inhibit the abnormal glutamate stimulation during peak levodopa dose, while releasing the receptor during normal activity. Furthermore, dipraglurant will wash out between doses, releasing the mGlu5 receptor when not required, i.e: when levodopa has worn off.

Dipraglurant completed Phase 2a PD-LID clinical trial

We evaluated the efficacy, safety and tolerability of dipraglurant at 50 mg and 100 mg in a Phase 2a proof-of-concept four weeks, randomized, double-blind, placebo-controlled, parallel-group out-patient clinical trial in 76 patients with Parkinson’s disease (dipraglurant n = 52, placebo n = 24) with moderate or severe LID. The study was conducted in 25 centers in the United States, France, Germany and Austria. The severity of LID was evaluated by both clinicians and the patients using the modified Abnormal Involuntary Movement Scale, or mAIMS, patient diaries and the patient global impression of change, or PGIC, and the clinician global impression of change, or CGIC, for both dyskinesia and motor symptoms of Parkinson’s disease. Motor symptoms of Parkinson’s disease were assessed using the Unified Parkinson Disease Rating Scale, or UPDRS.

The Phase 2a proof of concept clinical trial of dipraglurant in PD-LID met its primary end point, was generally well tolerated and no clinically significant abnormalities of safety monitoring parameters occurred. In addition, dipraglurant showed statistically significant effects on PD-LID as measured using mAIMS at Day 1 and Day 14. However, an increasing placebo response resulted in the effect of dipraglurant on PD-LID symptoms not showing statistical significance at Day 28.

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Figure 2: Dipraglurant Phase 2a PD-LID clinical trial design

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Figure 3: Dipraglurant Phase 2a PD-LID clinical trial dosing schedule

Patients were randomized to receive either active or placebo treatment at a 2:1 ratio. A blinded dose-titration regimen was employed over the first 3 weeks of treatment. Following the initial intake of a single capsule containing 50 mg or matching placebo, dose and dosing frequency were progressively escalated up to the target regimen of 100 mg tid (total daily dose of 300 mg) beginning on Day 22; the up-titration scheme was customizable based on tolerability. Dyskinesia was measured using the mAIMS at the mid-day does of dipraglurant and levodopa on Day 1, 14 and 28. Due to the short half-life of dipraglurant the acute effect of 50mg dose was measured on Day 1 and the acute effect of 100mg dose was measure on Day 14 and Day 28.

Outcome Measures

The primary objective of the study was safety and tolerability. This was assessed based on vital signs, physical and neurological examination, electrocardiogram, or ECG, laboratory tests, and AE monitoring.

Secondary efficacy outcome measures included the mAIMS, UPDRS Part III and patient diaries.

The main efficacy endpoint was severity of dyskinesia determined with mAIMS for dyskinesia in face, neck, trunk, and each of the upper and lower limbs. At screening, patients had to specify a dose of levodopa between 10:30 am and 3:30 pm that was regularly associated with moderate to severe dyskinesia. As severity of dyskinesia generally correlates with the plasma concentration of levodopa (peak dose dyskinesia) and as Tmax of dipraglurant is comparable, study medication was to be taken within 15 minutes prior to levodopa. Dyskinesia following this midday dose was assessed by the mAIMS on Days 0, 1, 14 and 28.

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Figure 4: MMRM analysis of the effect of dipraglurant on the peak mAIMS score reported as reduction from baseline

The above figure shows the effect of dipraglurant on dyskinesia as measured using the mAIMS at Day 1, 14 and 28. Dipraglurant reduced dyskinesia compared to placebo at all visits over the 28 days and showed statistically significant effects at Day 1 and 14 as well as improvements of ≥30% at Day 14 which were sustained through Day 28. The level of improvement with dipraglurant at each time point and Day 28 was about twice that of placebo. However, an increasing placebo response resulted in the effect of dipraglurant on PD-LID symptoms not showing statistical significance at Day 28. We believe the dose titration technique employed along with the 2:1 randomization of active to placebo, as well as the fact that placebo-mitigating techniques were not deployed in the study, contributed to the placebo response.

Figure 5: Dipraglurant cumulative % of PD-LID patients showing > 30% change of peak mAIMS from baseline

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Responders were defined as those patients reaching at least 30% improvement in peak mAIMS scores compared to baseline. At all visits, the percentage of responders was higher in the dipraglurant-treated group than in the placebo group and, on Days 14 and 28, exceeded 50% and showed a statistically significant difference over placebo.

Figure 6: Clinician rated global impression of change in LID patients after administration of dipraglurant and placebo

There was a significant improvement in the CGI-C as determined by the investigators. Figure 6 summarizes the results across each score level and for each treatment group at Day 28. The CGIC for improvement of dyskinesia was assessed by the investigating physician at Day 28 compared to baseline. The dipraglurant group improved by 71.2% versus 49.9% for the placebo group at Day 28 (p < 0.05).

Other Secondary Measures of Efficacy

Dipraglurant did not worsen motor control

UPDRS Part III scores in the post-levodopa dosing period did not differ between treatment groups. There was no evidence that dipraglurant led to increased parkinsonism or “Off” periods. This was an expected result given the mechanism of action, but was important to establish, as it confirms that the anti-dyskinetic benefits observed with treatment did not come at the cost of worsened motor control.

Patient reported effects on PD motor symptoms and dyskinesia—diary data

Mean daily “Off” time tended to decrease in each treatment group in weeks 1, 2 and 3, but at week 4, “Off” time decreased by about 50 minutes per day in the dipraglurant group versus an increase of about 9 minutes in the placebo group. Although, the week 4 difference was not statistically significant, or NSS (the study was not powered to detect such changes), it remains interesting and suggests the potential for additional benefits of treatment in this patient population.

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Figure 7. Pattern of motor complications of dipraglurant group patients over the course of a day, as reported in patients’ diaries—baseline versus week 4

Baseline

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Week 4

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The mean daily percentage of time in “On” with no dyskinesia increased in both treatment groups. At week 4, the dipraglurant group showed a 2.28 hours increase compared to 1.78 hours for the placebo group (NSS).

Overall, there were more patients in the dipraglurant group who reported “On” time without (w/o) dyskinesia and fewer patients reporting “On” time with dyskinesia (Figure 7). In this analysis, dipraglurant treatment improved the percentage of patients in “On” time without LID from morning to late afternoon.

Safety and Tolerability Data

This first study in PD patients met its primary objective and generally demonstrated tolerability for dipraglurant taken at doses of up to 100 mg tid for 4 weeks. The types of adverse events, or AEs, observed in PD patients up to 75 years of age were generally similar to those seen in healthy normal subjects. Fifty-two patients were exposed to the study drug vs. 24 patients on placebo.

The overall incidence of treatment emergent adverse events, or TEAEs, for the 4-week treatment period was 88.5% for the dipraglurant group compared to 75% for placebo. As doses increased over the titration period, an increase in AE incidence was observed. In Weeks 1 and 2, AE incidence was 53.8% for patients receiving dipraglurant 50 mg vs. 58.3% for placebo and, in Weeks 3 and 4, it was 73.1% for dipraglurant 100 mg vs. 62.5% for placebo. In both treatment groups, AEs occurred most commonly in the central nervous system (51.9% dipraglurant vs. 45.8% placebo).

The only significantly increased event compared to placebo was nausea. Although dyskinesia or worsening of dyskinesia was reported more frequently for dipraglurant than for placebo (n=11 vs. 3; 21.2% vs. 12.5%), there was no pattern to these reports and most were transient. In addition, 3 of the 11 patients who reported worsening dyskinesia in the treated group did so only in the follow-up period (i.e. when not taking the drug), thus the dyskinesia reocurred only after therapy had stopped. Therefore, the adjusted AE% was similar, 15.3% for dipraglurant vs. 12.5% for placebo.

Two patients withdrew due to TEAEs. Both were in the dipraglurant group at the 100 mg dose level.

| ● | One case concerned a 68-year-old man who experienced severe nausea, dizziness, and anxiety after he had been treated with dipraglurant for 3 weeks. At the time of AE, the patient was receiving 100 mg tid. After 3 days, the medication was discontinued and the AEs resolved without sequelae.

| ● | The other case concerned a 69-year-old man who experienced several AEs. On treatment Day 6, when he was taking 50 mg bid, he experienced moderate dyskinesia and fell. On Day 8, he experienced mild nausea and continued to experience moderate dyskinesia and sweating. The patient continued with the protocol defined dose escalation and started the 100 mg midday dose on Day 14. On Day 17, study medication was discontinued. By Day 21, nausea had resolved, whereas dyskinesia and sweating had not.

Only one severe AE occurred in the dipraglurant group, and, as it occurred 2 days after the end of treatment, it was considered unrelated to study medication.

Clinical laboratory tests in the study (biochemistry, hematology and urinalysis) did not show any relevant differences, neither over time nor between groups. There were no clinically significant ECG changes that occurred in the study in patients receiving dipraglurant.

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Dipraglurant in PD motor symptoms

There is an increasing body of literature that suggests that inhibiting mGlu5 in the striatopallidal pathway may also improve the motor symptoms of PD and may also prevent excitotoxic damage to the substantia nigra. Dipraglurant was investigated in the haloperidol induced catalepsy (HIC) model, an animal model of Parkinson’s disease. Haloperidol is an antagonist of the dopamine D2 receptor and overcoming the catalepsy (immobility) induced by haloperidol administration is suggestive of antiparkinsonian activity and may also have relevance for other movement disorders, such as tardive dyskinesia and dystonia, where reduced activity of dopamine D2 receptors is implicated. In the rat HIC model, dipraglurant reduced the amount of time rats were immobile, in a dose dependent manner. The effective plasma concentration was similar to that for the treatment of dyskinesia in the MPTP macaque and that which was seen to be effective in PD-LID patients. The suggestion of antiparkinsonian activity was also supported by observations in the Phase 2a clinical trial. In week 4 of treatment, patients reported an average “Off” time reduction of 50 minutes per day. Also, both patients and clinicians reported improvements in PD symptoms compared to placebo. Although none of these results were statistically significant, the observations were interesting and were noted by the PD experts who took part in the trials. PD motor symptom effects will continue to be evaluated in the larger pivotal clinical trials.

Dipraglurant in PD non-motor symptoms

As well as suffering from difficulty with poor and uncontrolled motor symptoms, PD patients also suffer from a wide variety of non-motor symptoms. Among these are affective disorders (e.g., anxiety, depression and anhedonia) and compulsive behavioral disorders (e.g., sex, alcohol, gambling, and shopping addiction). These compulsive behaviors are particularly linked to treatment with dopamine agonists and more specifically to those which act on the dopamine D3 receptor as well as D2 (e.g. pramipexole). Inhibition of mGlu5 is pre-clinically and clinically validated for the treatment of anxiety and depression, although no mGlu5 inhibitors are yet marketed for these indications. Additionally, inhibition of mGlu5 has been shown to have anti-addictive properties in a number of animal models, including cocaine self-administration in rats. These data suggest that mGlu5 inhibition may potentially have utility in treating certain non-motor symptoms of PD.

We received orphan drug designation from the United States Food and Drug Administration, or FDA, for dipraglurant in PD-LID and completed a Phase 2 proof of concept study. On June 17, 2022, we terminated our United States registration program including a pivotal Phase 2B/3 study and an open label study in PD-LID due to slow recruitment related to COVID-19. We have drug product available and are ready to re-start our pivotal program once further funding or a suitable partner is found.

Subject to regulatory approval we think dipraglurant could significantly improve the quality of life of Parkinson’s patients and offer a robust commercial opportunity.

Material Internal Research Programs

GABAB PAM

Activation of the GABAB, receptor, a Family C class of GPCR, is clinically and commercially validated. Generic GABAB receptor agonist, baclofen, also known as chlorophenibut, is marketed for spasticity and some spinal cord injuries, and used for overactive bladder, or OAB, but its wider use is limited due to a variety of side effects and short half-life. Researchers have shown that baclofen is effective in reducing drug self-administration, cravings, and anxiety, and thus promotes abstinence.

Our GABAB PAM drug candidates are novel, orally available, small molecules that have demonstrated positive effects and tolerability in several preclinical rodent models of pain, anxiety, addiction, cough and OAB. GABAB PAMs differ from the generic drug baclofen in that they are PAMs rather than orthosteric agonists at the GABAB receptor. The GABAB PAM only acts when the natural ligand (GABA) activates the receptor, and therefore respects the physiological cycle of activation. It has been proposed that PAMs produce fewer adverse effects and lead to less tolerance to effect than direct agonists (May and Christopoulos 2003; Langmead and Christopoulos 2006; Perdona et al. 2011; Urwyler 2011; Gjoni et al., 2008; Ahnaou et al).

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GABA B PAM for the treatment of substance use disorders, including alcohol use disorder

Our partner, Indivior, has licensed worldwide rights to our GABAB PAM program and is responsible for all development, manufacture and commercialization of any selected GABAB PAM drug candidates. Under the agreement, we are responsible for executing a research program funded by Indivior to discover novel drug candidates. Indivior has the right to select GABAB PAM drug candidates from our research program. We are in the clinical candidate selection phase and expect IND enabling studies to be initiated in 2024. Indivior’s primary focus is substance use disorder, including alcohol use disorder. We believe that substance use disorder is an indication with a significant commercial opportunity. Existing therapies often do not provide effective control of symptoms or have side effects that discourage adherence. Subject to regulatory approval, we believe that GABAB PAM may offer an innovative and differentiated treatment approach from existing therapies and may provide benefit to patients.

Scientific advances have revolutionized our understanding of addiction as a chronic, relapsing disease and not a moral failure. Drug addiction is a complex illness which is characterized by intense and, at times, uncontrollable drug craving, along with compulsive drug seeking and use that persist even in the face of devastating consequences. Addiction affects multiple brain circuits, including those involved in reward and motivation, learning and memory, and inhibitory control over behavior. While a person initially chooses to take drugs, over time the effects of prolonged exposure on brain functioning compromise the ability to choose, and seeking and consuming the drug become compulsive, often eluding a person’s self-control or willpower. Because drug abuse and addiction have so many dimensions and disrupt so many aspects of an individual’s life, treatment is not simple. Addiction treatment must help the individual stop using drugs, maintain a drug-free lifestyle, and achieve productive functioning in the family, at work and in society. Patients typically require long-term or repeated episodes of care to achieve the ultimate goal of sustained abstinence and recovery of their lives.

Alcohol Use Disorder, or AUD is a broad term for problems with alcohol, and is generally indicative of compulsive and uncontrolled consumption of alcoholic beverages. It is medically considered a disease, specifically an addictive illness. The World Health Organization estimates that about 140 million people throughout the world suffer from alcohol dependence. Patients with AUD suffer major changes to the brain structure and chemistry. Excessive alcohol consumption damages almost every organ in the body and the cumulative toxic effects can cause both medical (cirrhosis of the liver, pancreatitis, heart disease, peptic ulcers, sexual dysfunction) and psychiatric (epilepsy, dementia, psychosis, anxiety & depression) problems. Treatment of alcoholism is complex with current standard of care typically being prescribed to patients with heavy drinking but largely being unable to prevent them from relapsing. Approximately 5.8 percent or 14.4 million adults in the United States ages 18 and older had AUD in 2018. This includes 9.2 million men and 5.3 million women. In addition, an estimated 401,000 adolescents ages 12-17, in the United States, had AUD in 2018.

The program is in clinical candidate selection phase and we expect our partner, Indivior to initiate IND enabling studies in 2024.

GABAB PAM for the treatment of chronic cough

Our license agreement with Indivior provides for a funded research program, under which we have the right to select drug candidates for exclusive development in certain indications outside of substance use disorders, including chronic cough and pain. Chronic cough is a cough that lasts 8 weeks or more and does not respond to treatment for underlying cause or is unexplained. There are more that 18 million sufferers in the United States and Europe. In addition to the inconvenience of coughing potential complications can include, headaches, fainting, anxiety or depression, sleep loss, urine leakage, vomiting and muscle pain.

Current medications, including opioid drugs (codeine, morphine) and gabapentin/pregabalin deliver some relief, but their wider use is limited by side-effects and risk of abuse. Also, they are not recommended for children under 12. Current cough medications show limited or lack of effectiveness in 60% and 30% of patients, respectively. P2X3 inhibitors (gefapixant) have greater scope but still leave up to 25% of patients without any relief; in addition, discontinuation occurs due to gustatory side-effects.

Chronic cough is driven by hypersensitivity of the sensory C- and Aδ-fibers of the vagus nerve in combination with hypersensitivity of brain regions regulating cough. GABAB potentiators reduce cough by acting on GABAB receptors:

| ● | In the brain, in the regions regulating cough, including somatosensory cortex, thalamus, amygdala, solitary tract and paratrigeminal nuclei.

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| ● | In the periphery, on sensory endings of C-and Aδ-fibers, airway epithelium, lung smooth muscle cells and neutrophils, on cell bodies located in the jugular and nodose ganglia.

This target is well-validated and supported by clinical and preclinical data. Baclofen (a GABAB agonist) is used off-label in patients with chronic cough. Also, baclofen showed efficacy in several clinical studies and in animal models of cough. However, centrally-mediated side-effects (nausea, sedation, dizziness), poor pharmacokinetic profile (short half-life) and tolerance following repeated administration limit its clinical use.

We are developing multiple chemical series of GABAB PAMs as a treatment for refractory chronic cough. The program is in late clinical candidate selection phase, and subject to further funding or securing a development partner, we expect to initiate IND enabling studies.

Material agreements

Collaboration Agreement with Indivior for Development of Novel GABAB PAM Compounds, including for the Treatment of Addiction and Other CNS Diseases

In January 2018, we entered into an agreement with Indivior for the discovery, development and commercialization of novel GABAB PAM compounds for the treatment of addiction and other CNS diseases. This agreement included the selected clinical candidate, ADX71441. In addition, Indivior agreed to fund a research program at Addex to discover novel GABAB PAM compounds.

Indivior has sole responsibility, including funding liability, for development of selected compounds under the agreement through preclinical and clinical trials, as well as registration procedures and commercialization, if any, worldwide. Indivior has the right to design development programs for selected compounds under the agreement. Through our participation in a joint development committee, we review, in an advisory capacity, any development programs designed by Indivior. However, Indivior has authority over all aspects of the development of such selected compounds.

Under terms of the agreement, we have granted Indivior an exclusive license to use relevant patents and know-how in relation to the development and commercialization of drug candidates selected by Indivior. Subject to agreed conditions, Addex and Indivior jointly own all intellectual property rights that are jointly developed, and Addex or Indivior individually own all intellectual property rights that Addex or Indivior develop individually. Addex has retained the right to select compounds from the research program for further development in areas outside the interest of Indivior including Charcot-Marie-Tooth type 1A neuropathy, or CMT1A. Under certain conditions, but subject to certain consequences, Indivior may terminate the agreement.

In January 2018, under terms of the agreement, we received a non-refundable upfront fee of USD 5.0 million for the right to use the clinical candidate, ADX71441, including all materials and know-how related to this clinical candidate. In addition, we are eligible for payments on successful achievement of pre-specified clinical, regulatory and commercial milestones totaling USD 330 million. In addition, we are eligible for tiered royalties from high single digits to low double digits on net sales of applicable products on a country-by country-basis. The term of the royalty for each licensed product in any particular country commences on such product’s launch and ends on the latest of ten -year anniversary of launch, expiration of certain applicable patent rights, and expiration of certain applicable marketing or data exclusivity periods. On February 14, 2019, Indivior terminated the development of their selected compound, ADX71441.

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Separately, Indivior funds research at Addex, based on a research plan to be mutually agreed between the parties, to discover novel GABAB PAM compounds. These future novel GABAB PAM compounds, if selected by Indivior, become licensed compounds. We agreed with Indivior to an initial research term and duration of two years with a funding of USD 4 million over the period for our R&D costs incurred, that can be extended by twelve-month increments. Following Indivior’s selection of one newly identified compound, Addex has the right to also select one additional newly identified compound. Addex is responsible for the funding of all development and commercialization costs of its selected compounds and Indivior has no rights to the Addex selected compounds. The initial two-year research term was expected to run from May 2018 to April 2020. In 2019, Indivior agreed an additional research funding of USD 1.6 million, for the research period. In October 2020, the research term was extended until June 30, 2021 and Indivior agreed an additional research funding of USD 2.8 million. Effective May 1, 2021, the research term was extended until July 31, 2022 and Indivior agreed an additional research funding of CHF 3.7 million, of which CHF 2.7 million has been paid to us and CHF 1.0 million paid directly by Indivior to third party suppliers that are supporting the funded research program. In August 2022, the research agreement was extended until March 31, 2023 and Indivior agreed to additional research funding of CHF 0.85 million. The reserved indications, where Addex retains exclusive rights to develop its own independent GABAB PAM program, have also been expanded to include chronic cough. Effective November 1, 2022 the research term was extended until June 30, 2023 and Indivior agreed to additional research funding of CHF 0.95 million. Effective July 1, 2023, the research term was extended until June 30, 2024 and Indivior agreed to additional research funding of CHF 2.7 million including CHF 1.1 million expected to be received directly by us and CHF 1.6 million paid directly by Indivior to third party suppliers that are supporting the funded research program.

Indivior may terminate the Agreement in its entirety or with respect to one or more countries or products upon 90 days’ prior written notice prior to receipt of marketing approval for product candidates or twelve months’ prior written notice after the receipt of marketing approval.

Addex may terminate the agreement if Indivior commits a material breach of the agreement and fails to cure such breach within 90 days of Addex’s written notification to Indivior or fails to cure breaches to any payment obligations breach within 30 days, subject to certain conditions.

Collaboration Agreement with Janssen for Development of Novel mGlu2 PAM Compounds, including ADX71149, for the Treatment of CNS and Related Diseases

On December 31, 2004, we entered into a collaboration and license agreement with Janssen Pharmaceuticals, Inc., or Janssen, for the discovery, development and commercialization of novel mGlu2 PAM compounds for the treatment of CNS and related diseases. We agreed with Janssen to an initial research term and duration of two years that could have been extended if parties mutually agreed thereto in writing. The agreement was not extended beyond 2007. ADX71149 is one of the drug candidates discovered and selected for development by Janssen under the agreement. In 2012, Janssen announced completion of a Phase 2a clinical trial in Europe with ADX71149 for the treatment of schizophrenia demonstrating proof of principal in patients with negative symptoms of schizophrenia, such as apathy, social withdrawal, loss of emotional expression or sleep disorders. Janssen also conducted a Phase 2a clinical trial with ADX71149 for the treatment of patients with anxious depression, which failed to show statistically significant effects. In 2015 and 2018, Janssen scientists published studies demonstrating synergies with Keppra (a globally commercialized antiepileptic drug) in preclinical models of epilepsy. Janssen is conducting a placebo-controlled Phase 2a proof of concept clinical trial of ADX71149 in epilepsy patients since June 2021. Cohort 1 of the study has been completed and on May 10, 2023 we announced that an independent interim review committee, or IRC recommended to continue the study, following review of unblinded data from Part 1 of patient Cohort 1. On November 14, 2023, we announced that the last patient had been randomized in Cohort 2 and results evaluating the efficacy, safety and tolerability of ADX71149 in combination with levetiracetam or brivaracetam from patient Cohort 1 and Cohort 2 are anticipated for the second quarter of 2024. Under our agreement with Janssen, Janssen is responsible for financing the development and commercialization, if any, of ADX71149.

Under our agreement with Janssen, we have granted Janssen an exclusive license to use relevant patents and know-how in relation to the development and commercialization of drug candidates selected by Janssen under the agreement and a non-exclusive worldwide license to conduct research on the collaboration compounds using relevant patents and know-how. Subject to certain conditions, we and Janssen own, jointly, all intellectual property rights that we and Janssen develop jointly, and we or Janssen own all intellectual property rights that we or Janssen develop individually. Under certain conditions, but subject to certain consequences, Janssen may terminate the agreement for any reason, subject to a 90-day notice period.

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Janssen has sole responsibility, including funding liability, for development of selected compounds under the agreement through preclinical and clinical trials, as well as registration procedures and commercialization, if any, in the United States, Japan, the United Kingdom, Germany, France, Spain and Italy. Janssen has the right to design development programs for selected compounds under the agreement. Through our participation in a joint development committee, we review, in an advisory capacity, any development programs designed by Janssen. However, Janssen has authority over all aspects of the development of selected compounds and may develop or commercialize third-party compounds with a different mechanism of action for identical use.

Under the terms of the Janssen agreement, we received an upfront fee of € 4.6 million and research funding of € 6.4 million during the research period, which ran from 2005 to 2007. In addition, we are eligible for payments on successful achievement of pre-specified clinical and regulatory milestones. We are also eligible for low double digit royalties on net sales of applicable products on a country-by country-basis and on a product by product basis, for a period commencing on the date of first sale and ending upon the latest of the expiration of twelve years from the date of first sale of a product in a given country or the last to expire of our patents containing a claim covering composition of compound comprised in a product sold by Janssen, its affiliates or sublicensees in such country. We received a € 1.5 million milestone payment in relation to the entry of ADX71149 into Phase 1 in July 2009 and a € 2.6 million milestone payment in relation to the entry of ADX71149 into Phase 2 in June 2011. We are eligible for a further €109 million in success-based development and regulatory milestones and low double-digit royalties on net sales.

In the event that no compounds are discovered or identified during the research period, the agreement shall terminate.

Intellectual Property

Patents and Proprietary Rights

At the issuance date of this annual report on Form 20-F, we owned 10 U.S. and 179 foreign patents and a number of pending patent applications that cover various aspects of our allosteric modulator technologies, including several classes of compounds which are potentially useful as modulators of mGlu5, mGlu2 PAM and GABAB. More specifically, our patents and patent applications cover compounds, pharmaceutical compositions, polymorphs and uses of compounds for medical treatment.

Our patent strategy is to file patent applications on innovations and improvements to cover a majority of the major pharmaceutical markets in the world. We typically file priority applications at the United Kingdom Patent Office to establish a priority date for the generic subject matter and examples which are available at the filing date of each invention. Subsequently, we file international applications under the Patent Cooperation Treaty or PCT, with extra examples to support the scope of the claims (International Phase). After the International Phase, we file patent applications in selected countries representing potential major markets for our drug candidates (National/Regional Phase).

Generally, patents have a term of twenty years from the filing date, assuming all maintenance fees are paid. In some instances, patent terms can be increased or decreased, depending on the laws and regulations of the country or jurisdiction that issued the patent. Wherever appropriate and legally possible, we aim at obtaining patent protection for novel molecules, composition of matter and uses for drugs and inventions originating from our research and development efforts, as well as new manufacturing and other processes and formulations. In each case, we carefully balance the value of patent protection against the advantage of keeping the know-how regarding the invention confidential. We aim to position the claims of our applications to exploit gaps in prior art.

We have two patent families covering dipraglurant as a composition of matter and its polymorphs which are useful as mGlu5 NAMs: 95 patents have been granted to us, including 4 in the United States and 91 in other international jurisdictions (Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Great Britain, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Macedonia, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland/Liechtenstein, Turkey, Australia, Brazil, Canada, China, Hong Kong, Indonesia, Israel, Japan, South Korea, Mexico, New Zealand, Philippines, Russia, Singapore, South Africa and Ukraine). We also have 3 patent applications pending.

We have one patent family covering compounds which are useful as GABAB PAMs, of which 24 patents have been granted, including 2 in the United States and 22 in other international jurisdictions (Austria, Belgium, Denmark, Finland, France, Germany, Great Britain, Ireland, Italy, Netherlands, Norway, Spain, Sweden, Switzerland/Liechtenstein, Australia, Canada, China, India, Israel, Japan, and New Zealand).

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Jointly with Janssen, we have 70 patents in two patent families covering compounds which are useful as mGlu2 PAMs, including ADX71149, which is explicitly exemplified and claimed as a compound and as a pharmaceutical composition, we have 4 patents in the United States and 66 in other international jurisdictions (Albania, Austria, Belgium, Bosnia & Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, North Macedonia, Malta, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland/Liechtenstein, Turkey, Ukraine, United Kingdom, Algeria, Argentina, Australia, Brazil, Canada, China, Chile, Gulf Cooperation Council, Hong Kong, Israel, India, Indonesia, Japan, Republic of Korea, Malaysia, Mexico, New Zealand, Philippines, Russia, Singapore, South Africa, Thailand, Vietnam, and Taiwan).

Our portfolio of granted patents have expiry dates ranging from 2025 - 2034 without extension. Patent term extension of up to 5 years is available in some jurisdictions. For example, in the United States following the enactment of Title II of the Drug Price Competition and Patent Term Restoration Act (Public Law 98-417) it is generally possible to extend patent life by a maximum of 5 years.

The patent positions of pharmaceutical and biotechnology companies are uncertain and involve complex legal and factual issues. There can be no assurance that patents that have been issued will be held valid and enforceable in a court of law. Even for patents that are held valid and enforceable, the legal process associated with obtaining such a judgment is time consuming and costly. Additionally, issued patents can be subject to opposition or other proceedings that can result in the revocation of the patent or maintenance of the patent in amended form, and potentially in a form that renders the patent without commercially relevant or broad coverage. Further, our competitors may be able to circumvent and otherwise design around our patents. Even if a patent is issued and enforceable, because development and commercialization of pharmaceutical products can be subject to substantial delays, patents may expire early and provide only a short period of protection, if any, following the commercialization of a product covered by any of our patents. We may have to participate in interference proceedings declared by the U.S. Patent and Trademark Office, which could result in a loss of the patent or substantial cost to us.

U.S. and foreign patent rights and other proprietary rights exist that are owned by third parties and relate to pharmaceutical compositions and reagents, medical devices and equipment and methods for preparation, packaging and delivery of pharmaceutical compositions. We cannot predict with any certainty which, if any, of these rights will be considered relevant to our technology by authorities in the various jurisdictions where such rights exist, nor can we predict with certainty which, if any, of these rights will or may be asserted against us by third parties. We could incur substantial costs in defending ourselves and our partners against any such claims. Furthermore, parties making such claims may be able to obtain injunctive or other equitable relief, which could effectively block our ability to develop or commercialize some or all of our products in the United States and abroad and could result in the award of substantial damages. In the event of a claim of infringement, we or our partners may be required to obtain one or more licenses from third parties. There can be no assurance that we can obtain a license to any technology that we determine we need on reasonable terms, if at all, or that we could develop or otherwise obtain alternative technology. The failure to obtain licenses if needed may have a material adverse effect on our business, results of operations and financial condition.

We also rely on trade secret protection for our confidential and proprietary information. No assurance can be given that we can meaningfully protect our trade secrets. Others may independently develop substantially equivalent confidential and proprietary information or otherwise gain access to, or disclose, our trade secrets. Our success will depend in part on our ability to obtain and maintain patent protection for our drugs, preserve trade secrets, prevent third parties from infringing upon our proprietary rights and operate without infringing upon the proprietary rights of others, both in Switzerland and in other territories worldwide.

It is our policy to require our employees and consultants, outside scientific collaborators, sponsored researchers and other advisors who receive confidential information from us to execute confidentiality agreements upon the commencement of employment or consulting relationships with us. These agreements provide that all confidential information developed or made known to the individual during the course of the individual’s relationship with us is to be kept confidential and not disclosed to third parties except in specific circumstances. The agreements provide that all inventions conceived by an employee shall be our property. There can be no assurance, however, that these agreements will provide meaningful protection or adequate remedies for our trade secrets in the event of unauthorized use or disclosure of such information.

Trademarks

We own trademarks for Addex Pharmaceuticals in Switzerland.

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Competition

The development and commercialization of drugs is highly competitive. For each of the drug candidates and indications that we are pursuing, we compete with a variety of multinational and specialized pharmaceutical companies. This, includes products approved for marketing and/or drug candidates under development by our competitors which include:

ADX71149 for the treatment of epilepsy

Currently available therapies treatment of epilepsy includes racetams such as Brivaracetam (Briviact®) or Levetiracetam (Keppra®); benzodiazepines such as diazepam (Valium®), clonazepam (Klonopin®), lorazepam (Ativan®); carboxamides such as Carbamazepine (Carbatrol® or Tegretol®) and Eslicarbazepine (Aptiom®); GABA analogs such as Gabapentin (Neurotin®) or Pregabalin (Lyrica®); Perampanel (Fycompa®). Late-stage drug candidates in development which could compete with ADX71449 include Ganaxolone, Cannabidiol (Epidiolex), Everolimus (Afinitor / Votubia), ZX008.

Dipraglurant for post-stroke sensorimotor recovery

Therapies to improve patient motricity largely rely on physiotherapy and there are currently no drugs on the market to assist this process. There are currently 4 Phase 2a studies underway; Teva are testing armodafinil in combination with task-related training, Inserm are testing galantamine with cognitive rehabilitation, UCLA are testing Sinemet (L-DOPA) with the rehabilitation of the upper arm and KSA are testing L-DOPA with physiotherapy.

Dipraglurant for the treatment of PD-LID

Amantadine, GOCOVRI® (extended-release amantadine) and Deep Brain Stimulation (DBS) surgery are currently available therapies for the treatment of PD-LID. In addition, several drug candidates currently in clinical development could compete with dipraglurant for the treatment of PD-LID. Avanir Pharmaceuticals, Inc. is developing AVP-923 (NMDA antagonist), Neuraltus Pharmaceuticals, Inc. is developing NP002 (nicotine receptor agonist), Newron Pharmaceuticals, Inc. is developing safinamide (MAO-B inhibitor), Novartis Pharma AG is developing AQW051 (alpha 7 nAChR inhibitor). Integrative Research Laboratories Therapeutics AB is developing Mesdopetam (Dopamine 3 receptor antagonist), VistaGen Therapeutics Inc. is developing AV101 (NMDA antagonist), and Prilenia Therapeutics Inc. is developing pridopidine (D2 receptor agonist).

GABAB PAM for the treatment of substance use disorders, including alcohol use disorder

Currently available treatments of addiction include Buprenorphine (Suboxone®, Subutex®, Probuphine®, Sublocade™), naltrexone (Vivitrol®) to treat opioid addiction; bupropion (Zyban®) and varenicline (Chantix®) to treat nicotine addiction; and naltrexone (Vivitrol®), Acamprosate (Campral®), Disulfiram (Antabuse®) to treat alcohol addiction. Baclofen (a GABAB agonist) has been largely used off-label to treat alcohol abuse, and its approval is under review in France. In addition, several novel derivatives of baclofen are in clinical development and Astellas is in Phase I with ASP8062 as a novel GABAB PAM for substance-related disorders.

GABAB PAM for the treatment of chronic cough

Current medications for chronic cough include opioid drugs (codeine, morphine), gabapentin (Horizant, Neurontin), pregabalin (Lyrica), dextromethorphan (Benylin, Broncophan, Robitussin), guaifenesin (Mucinex, Bidex, Organidin). However, they suffer from limitations of use due to many side effects including abuse potential, drowsiness, GI dysfunction. Their antitussive effectiveness is lacking in large portion of patients, and most are not recommended for children under 12.

Recently, new classes of agents have demonstrated efficacy in clinical trials, including purinergic P2X3 receptor and neurokinin-1 receptor inhibitors. The P2X3 antagonist, gefapixant, is the first molecule approved in Japan and Europe for the treatment for refractory and unexplained chronic cough in adults. However, while having greater scope, gefapixant still leaves up to 25% of patients without any relief and treatment discontinuation occurs due to gustatory side-effects.

Baclofen, the GABAB orthosteric agonist, has been used off-label to treat GERD-related chronic cough, but also cough caused by angiotensin-converting enzyme inhibitors and chronic refractory cough of unknown cause.

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United States Government Regulation and Product Approval

Government authorities in the United States, at the federal, state and local levels, and in other countries, extensively regulate, among other things, the research, development, testing, manufacture, packaging, storage, recordkeeping, labeling, advertising, promotion, distribution, marketing, import and export of pharmaceutical products, such as those we are developing. The processes for obtaining regulatory approvals in the United States and in foreign countries, along with subsequent compliance with applicable statutes and regulations, require the expenditure of substantial time and financial resources.

Marketing

In the United States, the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act, (FDCA), and its implementing regulations. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state, local and foreign statutes and regulations requires the expenditure of substantial time and financial resources. Failure to comply with the applicable United States requirements at any time during the drug development process, approval process or after approval, may subject an applicant to a variety of administrative or judicial sanctions, such as the FDA’s refusal to approve pending new drug applications, or NDAs, withdrawal of an approval, imposition of a clinical hold, issuance of warning or untitled letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement or civil or criminal penalties.

The process required by the FDA before a drug may be marketed in the United States generally involves:

| · | completion of pre-clinical laboratory tests, animal studies and formulation studies in compliance with the FDA’s good laboratory practice, or GLP, regulations, including laboratory evaluation of product chemistry, toxicity and formulation, as well as animal studies to assess potential safety and efficacy;

| · | submission to the FDA of an Investigational New Drug, or IND, which must become effective before human clinical trials may begin;

| · | approval by an independent institutional review board, or IRB, at each clinical site before each clinical trial may be initiated;

| · | performance of adequate and well-controlled clinical trials in accordance with good clinical practice, or GCP, requirements to establish the safety and efficacy of the proposed drug for each indication;

| · | submission to the FDA of an NDA;

| · | satisfactory completion of an FDA advisory committee review, if applicable;

| · | satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the product is produced to assess compliance with cGMP requirements, and to assure that the facilities, methods and controls are adequate to preserve the drug’s identity, strength, quality and purity; satisfactory completion of an FDA inspection of selected clinical sites to assure compliance with GCPs and the integrity of the clinical data; payment of user fees; and

| · | FDA review and approval of the NDA.

Clinical Trials

Prior to the initiation of clinical testing, a sponsor must submit to the FDA an IND, application to the FDA, including the results of pre-clinical studies, manufacturing information, analytical data and any available clinical data or literature. Some pre-clinical testing may continue even after the IND is submitted. An IND automatically becomes effective 30 days after receipt by the FDA, unless before that time the FDA raises concerns or questions related to one or more proposed clinical trials and places the clinical trial on a clinical hold. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. As a result, submission of an IND may not result in the FDA allowing clinical trials to commence.

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Clinical trials involve the administration of the investigational new drug to human subjects under the supervision of qualified investigators in accordance with GCP requirements, which include the requirement that all research subjects provide their informed consent in writing for their participation in any clinical trial. Clinical trials are conducted under protocols detailing, among other things, the objectives of the trial, the parameters to be used in monitoring safety and the effectiveness criteria to be evaluated. A protocol for each clinical trial and any subsequent protocol amendments must be submitted to the FDA as part of the IND. In addition, an IRB at each institution participating in the clinical trial must review and approve the plan for any clinical trial before it commences at that institution, and the IRB must continue to oversee the clinical trial while it is being conducted. Information about certain clinical trials must be submitted within specific timeframes to the National Institutes of Health, or NIH, for public dissemination on their ClinicalTrials.gov website.

Human clinical trials are typically conducted in three sequential phases, which may overlap or be combined. In Phase 1, the drug is initially introduced into healthy human subjects or patients with the target disease or condition and tested for safety, dosage tolerance, absorption, metabolism, distribution, excretion and, if possible, to gain an initial indication of its effectiveness. In Phase 2, the drug typically is administered to a limited patient population to identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases and to determine dosage tolerance and optimal dosage. In Phase 3, the drug is administered to an expanded patient population, generally at geographically dispersed clinical trial sites, in well-controlled clinical trials to generate enough data to statistically evaluate the safety and efficacy of the product for approval, to establish the overall risk-benefit profile of the product and to provide adequate information for the labeling of the product.

Progress reports detailing the results of the clinical trials must be submitted, at least annually, to the FDA, and more frequently if certain serious adverse events occur. Phase 1, Phase 2 and Phase 3 clinical trials may not be completed successfully within any specified period, or at all. Furthermore, the FDA or the sponsor may suspend or terminate a clinical trial at any time on various grounds, including a finding that the research subjects are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements, or if the drug has been associated with unexpected serious harm to patients.

Marketing Approval

Assuming successful completion of the required clinical testing, the results of the pre-clinical and clinical studies, together with detailed information relating to the product’s chemistry, manufacture, controls and proposed labeling, among other things, are submitted to the FDA as part of an NDA requesting approval to market the product for one or more indications. In most cases, the submission of an NDA is subject to a substantial application user fee. Under the Prescription Drug User Fee Act, or PDUFA, guidelines that are currently in effect, the FDA has a goal of ten months from the date of “filing” of a standard NDA for a new molecular entity to review and act on the submission. This review typically takes twelve months from the date the NDA is submitted to the FDA because the FDA has sixty days from submission to make a “filing” decision.

In addition, under the Pediatric Research Equity Act, certain NDAs or supplements to an NDA must contain data that are adequate to assess the safety and effectiveness of the drug for the claimed indications in all relevant pediatric subpopulations, and to support dosing and administration for each pediatric subpopulation for which the product is safe and effective. The FDA may, on its own initiative or at the request of the applicant, grant deferrals for submission of some or all pediatric data until after approval of the product for use in adults, or full or partial waivers from the pediatric data requirements. Unless otherwise required by regulation, the pediatric data requirements do not apply to products with orphan designation.

The FDA also may require submission of a risk evaluation and mitigation strategy, or REMS, plan to ensure that the benefits of the drug outweigh its risks. The REMS plan could include medication guides, physician communication plans, assessment plans, and / or elements to assure safe use, such as restricted distribution methods, patient registries or other risk minimization tools.

The FDA conducts a preliminary review of all NDAs within the first 60 days after submission, before accepting them for filing, to determine whether they are sufficiently complete to permit substantive review. The FDA may request additional information rather than accept an NDA for filing. In this event, the application must be resubmitted with the additional information. The resubmitted application is also subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-depth substantive review. The FDA reviews an NDA to determine, among other things, whether the drug is safe and effective and whether the facility in which it is manufactured, processed, packaged or held meets standards designed to assure the product’s continued safety, quality and purity.

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The FDA may refer an application for a novel drug to an advisory committee. An advisory committee is a panel of independent experts, including clinicians and other scientific experts, that reviews, evaluates and provides a recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making decisions.

Before approving an NDA, the FDA typically will inspect the facility or facilities where the product is manufactured. The FDA will not approve an application unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within required specifications. Additionally, before approving an NDA, the FDA will typically inspect one or more clinical trial sites to assure compliance with GCP requirements.

The testing and approval process for an NDA requires substantial time, effort and financial resources, and takes several years to complete. Data obtained from pre-clinical and clinical testing are not always conclusive and may be susceptible to varying interpretations, which could delay, limit or prevent regulatory approval. The FDA may not grant approval of an NDA on a timely basis, or at all.

After evaluating the NDA and all related information, including the advisory committee recommendation, if any, and inspection reports regarding the manufacturing facilities and clinical trial sites, the FDA may issue an approval letter, or, in some cases, a complete response letter. A complete response letter generally contains a statement of specific conditions that must be met in order to secure final approval of the NDA and may require additional clinical or pre-clinical testing in order for FDA to reconsider the application. Even with submission of this additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval. If and when those conditions have been met to the FDA’s satisfaction, the FDA will typically issue an approval letter. An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications.

Even if the FDA approves a product, it may limit the approved indications for use of the product, require that contraindications, warnings or precautions be included in the product labeling, require that post-approval studies, including Phase 4 clinical trials, be conducted to further assess a drug’s safety after approval, require testing and surveillance programs to monitor the product after commercialization, or impose other conditions, including distribution and use restrictions or other risk management mechanisms under a REMS, which can materially affect the potential market and profitability of the product. The FDA may prevent or limit further marketing of a product based on the results of post-marketing studies or surveillance programs. After approval, some types of changes to the approved product, such as adding new indications, manufacturing changes, and additional labeling claims, are subject to further testing requirements and FDA review and approval.

Orange Book Listing

In seeking approval for a drug through an NDA, applicants are required to list with the FDA certain patents whose claims cover the applicant’s product. Upon approval of an NDA, each of the patents listed in the application for the drug is then published in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations, known as the Orange Book. Any applicant who files an Abbreviated New Drug Application, or ANDA, seeking approval of a generic equivalent version of a drug listed in the Orange Book referencing a drug listed in the Orange Book must certify, for each patent listed in the Orange Book for the referenced drug, to the FDA that (1) no patent information on the drug product that is the subject of the application has been submitted to the FDA, (2) such patent has expired, (3) the date on which such patent expires or (4) such patent is invalid or will not be infringed upon by the manufacture, use or sale of the drug product for which the application is submitted. The fourth certification described above is known as a paragraph IV certification. A notice of the paragraph IV certification must be provided to each owner of the patent that is the subject of the certification and to the holder of the approved NDA to which the ANDA. The applicant may also elect to submit a “section viii” statement certifying that its proposed label does not contain (or carves out) any language regarding the patented method-of-use rather than certify to a listed method-of-use patent. This section viii statement does not require notice to the patent holder or NDA owner. There might also be no relevant patent certification.

If the reference NDA holder and patent owners assert a patent challenge directed to one of the Orange Book listed patents within 45 days of the receipt of the paragraph IV certification notice, the FDA is prohibited from approving the application until the earlier of 30 months from the receipt of the paragraph IV certification expiration of the patent, settlement of the lawsuit, or a decision in the infringement case that is favorable to the applicant. Even if the 45 days expire, a patent infringement lawsuit can be brought and could delay market entry, but it would not extend the FDA-related 30-month stay of approval.

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Post-Approval Requirements

Drugs manufactured or distributed pursuant to FDA approvals are subject to pervasive and continuing regulation by the FDA, including, among other things, requirements relating to recordkeeping, periodic reporting, product sampling and distribution, advertising and promotion and reporting of adverse experiences with the product. After approval, most changes to the approved product, such as adding new indications, manufacturing changes or other labeling claims, are subject to further testing requirements and prior FDA review and approval. There also are continuing annual user fee requirements for any marketed products and the establishments at which such products are manufactured, as well as application fees for supplemental applications with clinical data.

Even if the FDA approves a product, it may limit the approved indications for use of the product, require that contraindications, warnings or precautions be included in the product labeling, including a boxed warning, require that post-approval studies, including Phase 4 clinical trials, be conducted to further assess a drug’s safety after approval, require testing and surveillance programs to monitor the product after commercialization, or impose other conditions, including distribution restrictions or other risk management mechanisms under a REMS, which can materially affect the potential market and profitability of the product. The FDA may prevent or limit further marketing of a product based on the results of post-marketing studies or surveillance programs.

In addition, drug manufacturers and other entities involved in the manufacture and distribution of approved drugs are required to register their establishments with the FDA and state agencies, and are subject to periodic unannounced inspections by the FDA and these state agencies for compliance with cGMP requirements. Changes to the manufacturing process are strictly regulated and often require prior FDA approval before being implemented. FDA regulations also require investigation and correction of any deviations from cGMP and impose reporting and documentation requirements upon the sponsor and any third party manufacturers that the sponsor may decide to use. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to maintain cGMP compliance.

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, or with manufacturing processes, or failure to comply with regulatory requirements, may result in mandatory revisions to the approved labeling to add new safety information; imposition of post-market studies or clinical trials to assess new safety risks; or imposition of distribution or other restrictions under a REMS program. Other potential consequences include, among other things:

| ● | restrictions on the marketing or manufacturing of the product, complete withdrawal of the product from the market or product recalls;

| ● | fines, warning letters or holds on post-approval clinical trials;

| ● | refusal of the FDA to approve pending NDAs or supplements to approved NDAs, or suspension or revocation of product approvals;

| ● | product seizure or detention, or refusal to permit the import or export of products; or

| ● | injunctions or the imposition of civil or criminal penalties.

The FDA strictly regulates marketing, labeling, advertising and promotion of products that are placed on the market. Drugs may be promoted only for the approved indications and in accordance with the provisions of the approved label, although physicians, in the practice of medicine, may prescribe approved drugs for unapproved indications. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to liability.

In addition, the distribution of prescription pharmaceutical products is subject to the Prescription Drug Marketing Act, or PDMA, which regulates the distribution of drugs and drug samples at the federal level, and sets minimum standards for the registration and regulation of drug distributors by the states. Both the PDMA and state laws limit the distribution of prescription pharmaceutical product samples and impose requirements to ensure accountability in distribution.

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United States Federal and State Fraud and Abuse, Data Privacy and Security, and Transparency Laws and Regulations

In addition to FDA restrictions on marketing of pharmaceutical products, federal and state healthcare laws and regulations restrict business practices in the biopharmaceutical industry. These laws may impact, among other things, our current and future business operations, including our clinical research activities, and proposed sales, marketing and education programs and constrain the business or financial arrangements and relationships with healthcare providers and other parties through which we market, sell and distribute our products for which we obtain marketing approval. These laws include anti-kickback and false claims laws and regulations, data privacy and security, and transparency laws and regulations, including, without limitation, those laws described below.

The federal Anti-Kickback Statute prohibits, among other things, individuals or entities from knowingly and willfully offering, paying, soliciting or receiving remuneration, directly or indirectly, overtly or covertly, in cash or in kind to induce or in return for purchasing, leasing, ordering or arranging for or recommending the purchase, lease or order of any item or service reimbursable under Medicare, Medicaid or other federal healthcare programs. The term “remuneration” has been broadly interpreted to include anything of value. The federal Anti-Kickback Statute has been interpreted to apply to arrangements between pharmaceutical manufacturers on one hand and prescribers, purchasers and formulary managers on the other hand. Although there are a number of statutory exceptions and regulatory safe harbors protecting some common activities from prosecution, the exceptions and safe harbors are drawn narrowly. Practices that involve remuneration that may be alleged to be intended to induce prescribing, purchases or recommendations may be subject to scrutiny if they do not qualify for an exception or safe harbor.

The reach of the federal Anti-Kickback Statute was also broadened by the Patient Protection and Affordable Care Act of 2010, as amended by the Health Care and Education Reconciliation Act of 2010, or collectively the ACA, which, among other things, amended the intent requirement of the federal Anti-Kickback Statute such that a person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it in order to have committed a violation. In addition, the ACA provides that the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the False Claims Act and the civil monetary penalties statute.

The federal civil and criminal false claims laws, including the False Claims Act, which prohibit, among other things, any individual or entity from knowingly presenting, or causing to be presented, a false claim for payment to the federal government or knowingly making, using or causing to be made or used a false record or statement material to a false or fraudulent claim to the federal government. A claim includes “any request or demand” for money or property presented to the U.S. government. Numerous pharmaceutical and other healthcare companies have been prosecuted under these laws for, among other things, allegedly providing free product to customers with the expectation that the customers would bill federal programs for the product and for causing false claims to be submitted because of the companies’ marketing of products for unapproved, and thus non-reimbursable, uses.

The federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, created additional federal criminal statutes that prohibit, among other things, knowingly and willfully executing a scheme to defraud any healthcare benefit program, including private third party payors and knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items or services. Similar to the federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation.

HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH, and their respective implementing regulations, impose certain requirements relating to the privacy, security and transmission of individually identifiable health information without appropriate authorization on certain health plans, healthcare clearinghouses and certain healthcare providers, known as covered entities, and their respective business associates, independent contractors that perform certain services involving the use or disclosure of individually identifiable health information as well as their covered subcontractors. HITECH also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business associates, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce HIPAA and seek attorneys’ fees and costs associated with pursuing federal civil actions.

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The federal Physician Payments Sunshine Act requires certain manufacturers of drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program, with specific exceptions, to report annually to the Centers for Medicare & Medicaid Services, or CMS, information related to payments or other transfers of value made to physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors), other healthcare professionals (such as physician assistants and nurse practitioners), and teaching hospitals, and applicable manufacturers and applicable group purchasing organizations to report annually to CMS ownership and investment interests held by physicians and their immediate family members.

We may also be subject to state and foreign law equivalents of each of the above federal laws; state laws that require manufacturers to report information related to payments and other transfers of value to physicians and other healthcare providers or marketing expenditures; state laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government, or that otherwise restrict payments that may be made to healthcare providers; state and local laws that require the registration of pharmaceutical sales representatives; as well as state and foreign laws that govern the privacy and security of health information in some circumstances, many of which differ from each other in substantial ways and often are not preempted by HIPAA, thus complicating compliance efforts.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations will involve substantial costs. Because of the breadth of these laws and the narrowness of the statutory exceptions and regulatory safe harbors available, it is possible that some of our business activities could be subject to challenge under one or more of such laws. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to substantial civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, exclusion from participating in government funded healthcare programs, such as Medicare and Medicaid, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, contractual damages, reputational harm and the curtailment or restructuring of our operations. To the extent that any of our products are sold in a foreign country, we may be subject to similar foreign laws and regulations, which may include, for instance, applicable post-marketing requirements, including safety surveillance, anti-fraud and abuse laws and implementation of corporate compliance programs and reporting of payments or transfers of value to healthcare professionals.

Coverage and Reimbursement

Market acceptance and sales of any drug products depend in part on the extent to which reimbursement for drug products will be available from third party payors, including government health administration authorities, managed care organizations and other private health insurers. third party payors decide which drug products they will pay for and establish reimbursement levels. third party payors often rely upon Medicare coverage policy and payment limitations in setting their own coverage and reimbursement policies. However, decisions regarding the extent of coverage and amount of reimbursement to be provided for drug products are made on a payor-by-payor basis. One payor’s determination to provide coverage for a drug product does not assure that other payors will also provide coverage, and adequate reimbursement, for the drug product. Additionally, a third party payor’s decision to provide coverage for a drug product does not imply that an adequate reimbursement rate will be approved. Each payor determines whether or not it will provide coverage for a drug product, what amount it will pay the manufacturer for the therapy, and on what tier of its formulary it will be placed. The position on a payor’s list of covered drugs, or formulary, generally determines the co-payment that a patient will need to make to obtain the drug product and can strongly influence the adoption of such drug product by patients and physicians. Patients who are prescribed drug products for their conditions and providers prescribing such drug products generally rely on third party payors to reimburse all or part of the associated costs. Patients are unlikely to use a drug product unless coverage is provided and reimbursement is adequate to cover a substantial portion of the cost of the drug product.

Reimbursement by a third-party payor may depend upon a number of factors, including the third-party payor’s determination that a drug product is neither experimental nor investigational, safe, effective, and medically necessary, appropriate for the specific patient, cost-effective, supported by peer-reviewed medical journals and included in clinical practice guidelines.

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Third party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular drug products. Even if reimbursement is available, the level of reimbursement is unpredictable. Inadequate coverage and reimbursement can impact the demand for, or the price of, drug products. If coverage and adequate reimbursement are not available, or are available only to limited levels, drug products may not be successfully commercialized. Further, adequate third-party payor reimbursement may not be available to enable price levels sufficient to realize appropriate returns on investment in drug product development.

In addition, the federal government and state legislatures have continued to implement cost containment programs, including price controls and restrictions on coverage and reimbursement. To contain costs, governmental healthcare programs and third-party payors are increasingly challenging the price, scrutinizing the medical necessity and reviewing the cost-effectiveness of drug products.

Impact of Healthcare Reform on our Business

In the United States and some foreign jurisdictions, there have been, and continue to be, several legislative and regulatory changes and proposed changes regarding the healthcare system that could prevent or delay marketing approval of drug product candidates, restrict or regulate post-approval activities, and affect the profitable sale of drug candidates.

Among policy makers and payors in the United States and elsewhere, there is substantial interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs, improving quality and / or expanding access. In the United States, the pharmaceutical industry has been a particular focus of these efforts and has been affected by major legislative initiatives. In March 2010, the ACA was passed, which substantially changed the way healthcare is financed by both the government and private insurers, and continues to greatly impact the U.S. pharmaceutical industry. The ACA, among other things: (i) increased the minimum Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program and extends the rebate program to individuals enrolled in Medicaid managed care organizations; (ii) established an annual, nondeductible fee on any entity that manufactures or imports certain specified branded prescription drugs and biologic agents apportioned among these entities according to their market share in some government healthcare programs; (iii) expanded the availability of lower pricing under the 340B drug pricing program by adding new entities to the program; (iv) increased the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program, to 23.1% and 13% of the average manufacturer price for most branded and generic drugs, respectively and capped the total rebate amount for innovator drugs at 100% of the Average Manufacturer Price, or AMP; (v) expanded the eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to additional individuals and by adding new mandatory eligibility categories for individuals with income at or below 133% of the federal poverty level, thereby potentially increasing manufacturers’ Medicaid rebate liability; (vi) established a new Medicare Part D coverage gap discount program, in which manufacturers must now agree to offer 70% point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D; (vii) created a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research; and (viii) established a Center for Medicare Innovation at CMS to test innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug.

There have been executive, judicial and Congressional challenges to certain aspects of the ACA. For example, on June 17, 2021 the United States Supreme Court dismissed a challenge on procedural grounds that argued the ACA is unconstitutional in its entirety because the “individual mandate” was repealed by Congress. Further, prior to the U.S. Supreme Court ruling, President Biden issued an executive order that initiated a special enrollment period for the purposes of obtaining health insurance coverage through the ACA marketplace, which began on February 15, 2021 and remained open through August 15, 2021. The executive order also instructed certain governmental agencies to review and reconsider their existing policies and rules that limit access to healthcare, including among others, reexamining Medicaid demonstration projects and waiver programs that include work requirements, and policies that create unnecessary barriers to obtaining access to health insurance coverage through Medicaid or the ACA. It is possible that the ACA will be subject to judicial or Congressional challenges in the future. Further, on August 16, 2022 President Biden signed the Inflation Reduction Act of 2022, or IRA, into law, which among other things, extends enhanced subsidies for individuals purchasing health insurance coverage in ACA marketplaces through plan year 2025. The IRA also eliminates the “donut hole” under the Medicare Part D program beginning in 2025 by significantly lowering the beneficiary maximum out-of-pocket cost and creating a new manufacturer discount program. It is possible that the ACA will be subject to judicial or Congressional challenges in the future. It is unclear how such challenges, and the healthcare reform measures of the Biden administration will impact the ACA and our business.

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Other legislative changes have been proposed and adopted since the ACA was enacted. These changes include aggregate reductions to Medicare payments to providers of 2% per fiscal year pursuant to the Budget Control Act of 2011, which began in 2013, and due to subsequent legislative amendments to the statute, including the BBA, and the Infrastructure Investment and Jobs Act, will remain in effect through 2032 unless additional Congressional action is taken. The American Taxpayer Relief Act of 2012, among other things, further reduced Medicare payments to several providers, including hospitals and cancer treatment centers, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. These new laws may result in additional reductions in Medicare and other healthcare funding, which could have an adverse effect on customers for our drug candidates, if approved, and, accordingly, our financial operations. Additionally, on March 11, 2021, President Biden signed the American Rescue Plan Act of 2021 into law, which eliminates the statutory Medicaid drug rebate cap, currently set at 100% of a drug’s average manufacturer price, for single source and innovator multiple source drugs, that began on January 1, 2024.

Additionally, there has been heightened governmental scrutiny in the United States of pharmaceutical pricing practices in light of the rising cost of prescription drugs and biologics. Such scrutiny has resulted in several recent congressional inquiries and proposed and enacted federal and state legislation designed to, among other things, bring more transparency to product pricing, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for products. At the federal level, in July 2021, the Biden administration released an executive order, “Promoting Competition in the American Economy,” with multiple provisions aimed at prescription drugs. In response to Biden’s executive order, on September 9, 2021, the Department of Health and Human Services, or HHS released a Comprehensive Plan for Addressing High Drug Prices that outlines principles for drug pricing reform and sets out a variety of potential legislative policies that Congress could pursue as well as potential administrative actions HHS can take to advance these principles. No legislation or administrative actions have been finalized to implement these principles. In addition, the IRA, among other things, (i) directs HHS to negotiate the price of certain high-expenditure, single-source drugs and biologics covered under Medicare, and subjects drug manufacturers to civil monetary penalties and a potential excise tax by offering a price that is not equal to or less than the negotiated “maximum fair price” for such drugs and biologics under the law, and (ii) imposes rebates with respect to certain drugs and biologics covered under Medicare Part B or Medicare Part D to penalize price increases that outpace inflation. The IRA permits HHS to implement many of these provisions through guidance, as opposed to regulation, for the initial years. These provisions take effect progressively starting in fiscal year 2023. On August 29, 2023, HHS announced the list of the first ten drugs that will be subject to price negotiations, although the Medicare drug price negotiation program is currently subject to legal challenges. It is currently unclear how the IRA will be implemented but is likely to have a significant impact on the pharmaceutical industry. In response to the Biden administration’s October 2022 executive order, on February 14, 2023, HHS released a report outlining three new models for testing by the CMS Innovation Center which will be evaluated on their ability to lower the cost of drugs, promote accessibility, and improve quality of care. It is unclear whether the models will be utilized in any health reform measures in the future. Further, on December 7, 2023, the Biden administration announced an initiative to control the price of prescription drugs through the use of march-in rights under the Bayh-Dole Act. On December 8, 2023, the National Institute of Standards and Technology published for comment a Draft Interagency Guidance Framework for Considering the Exercise of March-In Rights which for the first time includes the price of a product as one factor an agency can use when deciding to exercise march-in rights. While march-in rights have not previously been exercised, it is uncertain if that will continue under the new framework. Additionally, on July 9, 2021, President Biden issued an executive order directing the FDA to, among other things, continue to clarify and improve the approval framework for biosimilars, including the standards for interchangeability of biological products, facilitate the development and approval of biosimilar and interchangeable products, clarify existing requirements and procedures related to the review and submission of BLAs, and identify and address any efforts to impede biosimilar competition. It is unclear whether these or similar policy initiatives will be implemented in the future.

At the state level, legislatures are increasingly passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. For example, on January 5, 2024, the FDA approved Florida’s Section 804 Importation Program (SIP) proposal to import certain drugs from Canada for specific state healthcare programs. It is unclear how this program will be implemented, including which drugs will be chosen, and whether it will be subject to legal challenges in the United States or Canada. Other states have also submitted SIP proposals that are pending review by the FDA. Any such approved importation plans, when implemented, may result in lower drug prices for products covered by those programs.

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Manufacturing and Supply

We rely on third party manufacturing and supply partners for our supply for, preclinical studies and clinical trials. We currently do not have in-house facilities to manufacture our research and development, preclinical and clinical drug supplies.

Legal Proceedings

From time to time, we may become involved in litigation or other legal proceedings relating to claims arising from the ordinary course of business. There are currently no claims or actions pending against us that, in the opinion of our management, are likely to have a material adverse effect on our results of operations, financial condition or cash flows.

C. Organizational Structure

The following diagram illustrates our corporate structure at the issuance date of this Annual Report on Form 20-F including the indirect 20% minority equity interest into Neurosterix Pharma Sàrl held by Addex since April 2, 2024 following the sale to Neurosterix Pharma Sàrl of our allosteric modulator drug discovery technology platform and a portfolio of pre-clinical programs:

D. Property, Plants and Equipment.

Our registered office is located in 12, Chemin des Aulx, Plan-les-Ouates, Geneva, Switzerland. Our administrative offices are located in Campus Biotech, Chemin des Mines 9, Geneva, Switzerland. At the issuance date of this annual report on Form 20-F, our office and laboratory spaces at Campus Biotech have been transferred Neurosterix Pharma Sàrl,. Under the service agreement signed between Addex Pharma SA and Neurosterix Pharma Sàrl, we have access to administrative offices now leased by Neuroterix Pharma Sàrl.

Item 4A. Unresolved Staff Comments.

Not applicable.

Item 5. Operating and Financial Review and Prospects.

You should read the following discussion in conjunction with our audited consolidated financial statements, including the related notes thereto, included in this Annual Report on Form 20-F. In addition to historical information, this discussion contains

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forward-looking statements that involve risks and uncertainties. You should read the sections of this Annual Report on Form 20-F entitled “Item 3D—Risk Factors” and “Special Note Regarding Forward - Looking Statements” for a discussion of the factors that could cause our actual results to differ materially from our expectations.

Overview

We are a clinical-stage pharmaceutical company focused on the development of a portfolio of novel orally available small molecule drug candidates. Our business comprises of a pipeline of proprietary clinical and preclinical stage drug candidates that are being developed by our partners and internally. We or our partners are developing these clinical and preclinical stage proprietary drug candidates for diseases for which there are no approved therapies or where improved therapies are needed including epilepsy, Parkinson’s disease levodopa induced dyskinesia or PD-LID, post-stroke sensorimotor recovery, traumatic brain injury, or TBI, recovery, substance use disorder, or, SUD, and cough.

Allosteric modulators target a specific receptor or protein and alter the effect of the body’s own signaling molecules on their target through a novel mechanism of action. These innovative small molecule drug candidates offer several potential advantages over conventional non-allosteric molecules and may offer an improved therapeutic approach to existing drug treatments. We believe that the allosteric modulator principle has broad applicability across a wide range of biological targets and therapeutic areas.

Our lead partnered drug candidate, ADX71149 is a novel orally active metabotropic glutamate receptor subtype 2 positive allosteric modulator, or mGlu2 PAM for the treatment of epilepsy. Our partner, Janssen Pharmaceuticals, Inc., or Janssen, a subsidiary of Johnson & Johnson is conducting a placebo-controlled Phase 2a proof of concept clinical trial of ADX71149 in epilepsy patients since June 2021. Cohort 1 of the study has been completed and on November 14, 2023, we announced that the last patient had been randomized in Cohort 2. Results evaluating the efficacy, safety and tolerability of ADX71149 in combination with levetiracetam or brivaracetam from patient Cohort 1 and Cohort 2 are anticipated for the second quarter of 2024. Under our agreement with Janssen, Janssen is responsible for financing the development and commercialization, if any, of ADX71149.

Our lead wholly owned drug candidate, dipraglurant, a metabotropic glutamate receptor subtype 5 negative allosteric modulator, or mGlu5 NAM, is currently under evaluation for future development in PD-LID or post-stroke/TBI recovery. We have initiated discussions with potential partners with the objective of collaborating with them for the future development of dipraglurant:

| ● | Dipraglurant for PD-LID. We received orphan drug designation from the United States Food and Drug Administration, or FDA, for dipraglurant in PD-LID and in a 28-day Phase 2a placebo-controlled clinical trial, conducted in the United States and Europe, in patients with PD-LID, dipraglurant met its primary end point in being generally well tolerated with no clinically significant abnormalities of safety monitoring parameters occurring. In addition, at Day 1 and Day 14, dipraglurant showed statistically significant effects on PD-LID clinical symptoms, as measured using the modified abnormal involuntary movement scale, or mAIMs. However, an increasing placebo response resulted in the effect of dipraglurant on PD-LID clinical symptoms not showing statistical significance at Day 28. On June 17, 2022, we terminated our United States registration program including a pivotal Phase 2B/3 study and an open label study in PD-LID due to slow recruitment attributed to the COVID 19 global pandemic related constraints. Subject to funding or securing a development partner, we are ready to recommence a Phase 2B/3 clinical study.

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| ● | Dipraglurant for post-stroke/TBI recovery. There are currently no drugs to support post-stroke/TBI recovery and current therapies rely on retraining and physiotherapy, with rehabilitation, largely partial, taking 6 month or more. Functional recovery by stimulating network connectivity in the brain with mGlu5 NAM post-stroke, has been highlighted in a recent publication in Brain and demonstrated preclinically with dipraglurant, which significantly restored functional control after just three days of once-daily treatment. We are conducting additional in vivo studies with dipraglurant in animal models of stroke and subject to funding or securing a development partner, we plan to commence a Phase 2a clinical study.There is a large unmet need in post-stroke/TBI recovery, and we believe this innovative approach represents a significant commercial opportunity.

We are completing a funded research program to discover novel gamma-aminobutyric acid subtype-b positive allosteric modulators, or GABAB PAMs, for Indivior PLC, or Indivior. Under the terms of the agreement with Indivior, we have the right to select GABAB PAM drug candidates for a number of reserved indications, including chronic cough. This target is clinically validated with baclofen, an orthosteric agonist of GABAB, used off label to treat cough patients. However, baclofen’s use is limited by serious side-effects, short half-life and gradual loss of efficacy during chronic treatment. By more precisely targeting the GABAB receptor with a PAM we aim to have a best-in-class treatment with improved tolerability suitable for the chronic nature of this disease. This indication has a significant unmet medical need and represents a significant commercial opportunity. We are in the late clinical candidate selection phase and have demonstrated proof-of-concept in animal models of cough with several GABAB PAM compounds. We expect to select drug candidates under the agreement with Indivior at the end of Q2 2024 and subject to securing financial resources expect to start IND enabling studies.

We cannot forecast with any degree of certainty which proprietary products or indications, if any, will be subject to future collaborative arrangements, in whole or in part, and how such arrangements would affect our development plan or capital requirements. To date, we have secured grants and other funding from: The Michael J. Fox Foundation for Parkinson’s Research, or MJFF, for the development of dipraglurant for the treatment of PD-LID; the National Institute of Drug Abuse, or NIDA, to generate important data on the role of GABAB in substance use disorder and the Charcot-Marie-Tooth Association, or CMTA to evaluate the role of GABAB PAM compounds in preclinical models of CMT1A. As we advance our clinical and preclinical programs, we will continue to apply for subsidies, grants and government or agency sponsored studies that could offset or reduce our development costs.

The development and commercialization of drugs is highly competitive. We compete with a variety of multinational pharmaceutical companies and specialized pharmaceutical companies, including products approved for marketing and/or drug candidates under development, for each of the drug candidates and each of the indications for which we are developing. Furthermore, government authorities in the United States, at the federal, state and local levels, and in other countries, extensively regulate, among other things, the research, development, testing, manufacture, packaging, storage, recordkeeping, labeling, advertising, promotion, distribution, marketing, import and export of pharmaceutical products, such as those we are developing. The processes for obtaining regulatory approvals in the United States and in foreign countries, along with subsequent compliance with applicable statutes and regulations, require the expenditure of substantial time and financial resources.

We were founded in May 2002 and completed our initial public offering of shares on the SIX Swiss Exchange in May 2007. On January 29, 2020, we listed American Depositary Shares (ADSs) representing our shares on the Nasdaq Stock Market following the United States Securities and Exchange Commission (SEC) having declared our registration statements on Forms F-1 and F-6 effective. On October 6, 2023, we filed a post-effective amendment to the form F-6 in order to change our ADS ratio from one ADS to six shares to a new ratio of one ADS to one hundred and twenty shares. The ADS ratio change has been effective since October 23, 2023 and had the same effect as a one to twenty ADS reverse split. The ADS ratio change had no impact on the Company’s underlying shares and was intended to enable the Company to regain compliance with the Nasdaq minimum bid price requirement of ADSs. On November 8, 2023, the company announced that it had received a written notification from Nasdaq confirming that the compliance had been regained. In the future, we may be subject to further written notifications from Nasdaq related to the non-compliance of continued listing rules such as minimum shareholders’ equity.

Our operations to date have included organizing and staffing our company, raising capital, out-licensing rights to our research stage programs including our mGlu2 PAM and GABAB PAM programs and conducting preclinical studies and clinical trials.

To date, we have generated CHF 66.4 million of revenue from the sale of license rights and conducting funded research activities for certain of our research programs. We have historically financed our operations mainly through the sale of equity. Through December 31, 2023, we had raised an aggregate of CHF 355.2 million of gross proceeds from the sale of equity.

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We have never been profitable and have incurred significant net losses in each period since our inception. Our net losses were CHF 10.6 million, CHF 20.8 million, and CHF 15.4 million for years ended December 31, 2023, 2022 and 2021, respectively. As of December 31, 2023, we had accumulated losses of CHF 360.4 million. We expect to continue to incur significant expenses and operating losses in the medium to long term. We anticipate that our expenses will increase significantly in connection with our ongoing and future activities as we:

| ● | continue to invest in our portfolio of preclinical and clinical stage programs;

| ● | hire additional research and development, and general and administrative personnel;

| ● | maintain, expand and protect our intellectual property portfolio;

| ● | identify and in-license or acquire additional drug candidates; and

| ● | incur additional costs associated with operating as a public company in the United States.

We will need substantial additional funding to support our operating activities as we advance our research and drug candidates through clinical development, seek regulatory approval and prepare for commercialization, if any, of our product candidates are approved. Adequate funding may not be available to us on acceptable terms, or at all.

We have no manufacturing facilities, and all of our manufacturing activities are contracted out to third parties. Additionally, we currently utilize third-party contractors to carry out a significant proportion of our research and development activities. Furthermore, we do not yet have a sales organization.

The Neurosterix Transaction

On April 2, 2024, we divested our allosteric modulator discovery platform and pre-clinical programs to a new Swiss company, Neurosterix Pharma Sàrl (equivalent to an LLC). Neurosterix is focused on the discovery and development of novel orally available allosteric modulator drug candidates, including M4 PAM for schizophrenia, mGlu7NAM for stress related disorders and mGlu2NAM for mild neurocognitive disorders. In connection with the transaction, we received CHF 5.0 million and a 20% equity interest in Neurosterix US Holdings LLC, the sole shareholder of Neurosterix. Neurosterix received USD 63 million in initial funding from a syndicate of investors led by Perceptive Advisors.

The divestment of our discovery platform and early-stage programs includes the transfer of the associated research and development staff, with the provision of a service agreement to allow key members of staff to support us in achieving our business strategy. As of the date of the Transaction, all employees of Addex, other than our Head of Finance, became employees of Neurosterix. Pursuant to the service agreement, certain former Addex employees, including our Chief Executive Officer, will dedicate a portion of their time to Addex.

License Agreement with Indivior

In January 2018, we entered into an agreement with Indivior for the discovery, development and commercialization of novel GABAB PAM compounds for the treatment of addiction and other CNS diseases. This agreement included the selected clinical candidate, ADX71441. In addition, Indivior agreed to fund a research program at Addex to discover novel GABAB PAM compounds.

Indivior has sole responsibility, including funding liability, for development of selected compounds under the agreement through preclinical and clinical trials, as well as registration procedures and commercialization, if any, worldwide. Indivior has the right to design development programs for selected compounds under the agreement. Through our participation in a joint development committee, we review, in an advisory capacity, any development programs designed by Indivior. However, Indivior has authority over all aspects of the development of such selected compounds.

Under terms of the agreement, we have granted Indivior an exclusive license to use relevant patents and know-how in relation to the development and commercialization of drug candidates selected by Indivior. Subject to agreed conditions, Addex and

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Indivior jointly own all intellectual property rights that are jointly developed, and Addex or Indivior individually own all intellectual property rights that Addex or Indivior develop individually. Addex has retained the right to select compounds from the research program for further development in areas outside the interest of Indivior including cough. Under certain conditions, but subject to certain consequences, Indivior may terminate the agreement.

In January 2018, under terms of the agreement, we received a non-refundable upfront fee of USD 5.0 million for the right to use the clinical candidate, ADX71441, including all materials and know-how related to this clinical candidate. In addition, we are eligible for payments on successful achievement of pre-specified clinical, regulatory and commercial milestones totaling $330 million, and royalties on net sales ranging from mid-single digits to low double-digits. On February 14, 2019, Indivior terminated the development of their selected compound, ADX71441.

Separately, Indivior funds research at Addex, based on a research plan to be mutually agreed between the parties, to discover novel GABAB PAM compounds. These future novel GABAB PAM compounds, if selected by Indivior, become licensed compounds. We agreed with Indivior to an initial research term and duration of two years with a funding of USD 4 million over the period for our R&D costs incurred, that can be extended by twelve-month increments. Following Indivior’s selection of one newly identified compound, Addex has the right to also select one additional newly identified compound. Addex is responsible for the funding of all development and commercialization costs of its selected compounds and Indivior has no rights to the Addex selected compounds. The initial two-year research term was expected to run from May 2018 to April 2020. In 2019, Indivior agreed an additional research funding of USD 1.6 million, for the research period. On October 30, 2020, the research term was extended until June 30, 2021 and Indivior agreed to additional research funding of USD 2.8 million. Effective May 1, 2021, the research term was extended until July 31, 2022 and Indivior agreed additional research funding of CHF 3.7 million, of which CHF 2.7 million has been paid to us, and CHF 1.0 million paid directly by Indivior to third party suppliers that are supporting the funded research program. In August 2022, the research agreement was extended until March 31, 2023 with additional research funding of CHF 0.85 million. The reserved indications, where Addex retains exclusive rights to develop its own independent GABAB PAM program, have also been expanded to include cough. Effective November 1, 2022 the research term was extended until June 30, 2023 and Indivior agreed to additional research funding of CHF 0.95 million. Effective July 1, 2023, the research term was extended until June 30, 2024 and Indivior agreed to additional research funding of CHF 2.7 million including CHF 1.1 million expected to be received directly by us and CHF 1.6 million paid directly by Indivior to third party suppliers that are supporting the funded research program.

The contract contains two distinct material promises and performance obligations: (1) the selected compound ADX71441 which falls within the definition of a licensed compound, whose rights of use and benefits thereon was transferred in January 2018 and, (2) the research services to be conducted by Addex and funded by Indivior to discover novel GABAB PAM compounds for clinical development that may be discovered over the research term of the agreement and selected by Indivior.

License Agreement with Janssen

Under our agreement with Janssen Pharmaceuticals Inc. (formerly known as Ortho-McNeil-Janssen Pharmaceuticals Inc), or Janssen, we granted Janssen an exclusive license to use relevant patents and know-how in relation to the development and commercialization of drug candidates selected by Janssen under the agreement and a non-exclusive worldwide license to conduct research on the collaboration compounds using relevant patents and know-how. Subject to certain conditions, we and they agreed to own, jointly, all intellectual property rights that we develop jointly and, individually, all intellectual property rights that either party develops individually. Under certain conditions, but subject to certain consequences, Janssen may terminate the agreement for any reason, subject to a 90-day notice period.

Janssen has sole responsibility, including funding liability, for development of selected compounds under the agreement through preclinical and clinical trials, as well as registration procedures and commercialization, if any, in the United States, Japan, the United Kingdom, Germany, France, Spain and Italy. Janssen has the right to design development programs for selected compounds under the agreement. Through our participation in a joint development committee, we review, in an advisory capacity, any development programs designed by Janssen. However, Janssen has authority over all aspects of the development of selected compounds and may develop or commercialize third-party compounds.

Janssen initiated a Phase 2a proof of concept clinical trial of ADX71149 in epilepsy patients in June 2021. We are eligible for a further EUR 109 million in success-based development and regulatory milestones and low double-digit royalties on net sales.

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Components of Results of Operations

Revenue

From the beginning of January 2017 through December 2023, we recognized CHF 18.4 million as revenue primarily under our license agreement with Indivior. We do not have approval to market or commercialize any of our drug candidates, we have never generated revenue from the sale of products and we do not expect to generate any revenue from product sales for the foreseeable future. Prior to approval of a drug candidate, we will seek to generate revenue from a combination of license fees, milestone payments in connection with collaborative or strategic relationships, royalties resulting from the licensing of our drug candidates and payments from sponsored research and development activities as well as grants from governmental and non-governmental organizations.

Revenue from collaborative arrangements comprises the fair value for the sale of products and services, net of value-added tax, rebates and discounts. Revenue from the rendering of services is recognized in the accounting period in which the services are rendered, by reference to completion of the specific transaction assessed on the basis of the actual service provided as a proportion of the total service to be provided. Revenue from collaborative arrangements may include the receipt of non-refundable license fees, milestone payments, and research and development payments. When we have continuing performance obligations under the terms of the arrangements, non-refundable fees and payments are recognized as revenue by reference to the completion of the performance obligation and the economic substance of the agreement.

Our revenue has varied, and we expect revenue to continue to vary, substantially from year to year, depending on the structure and timing of milestone events, as well as our development and commercialization strategies and those of our collaboration partners for our drug candidates. We, therefore, believe that historical period to period comparisons are not meaningful and should not be relied upon as an indicator of our future revenue and performance potential.

Other Income

From the beginning of January 2017 through December 2023, we recognized CHF 1.7 million as other income including CHF 1.2 million relating to grants from The Michael J. Fox Foundation for Parkinson’s Research, or MJFF, to finance certain clinical activities related to dipraglurant development in Parkinson’s disease levodopa-induced dyskinesia, or PD-LID, and other discovery activities.

In July 2019, we were funded by Eurostars/Innosuisse for CHF 0.5 million to support our mGlu7 NAM program totally recognized as income as of December 31, 2023.

In September 2023, we were funded by Eurostars/Innosuisse for CHF 0.5 million to support our mGlu2 NAM program of which CHF 0.3 million were received in December 2023. As of December 31, 2023, CHF 0.03 million has been recognized as income as of December 31, 2023, and CHF 0.32 million as deferred income in accordance with the grant conditions.

Grants are recognized at their fair value where there is reasonable assurance that the grant will be received and that we will comply with all associated conditions. Grants relating to costs are recognized as other income in the statement of comprehensive loss over the period necessary to match them with the costs that they are intended to compensate.

Operating Expenses

Research and Development Costs

From the beginning of January 2017 through December 2023, we incurred CHF 64.8 million in research and development costs. They consist mainly of direct research costs, which include costs associated with the use of contract research organizations, or CROs, and consultants hired to assist on our research and development activities, personnel costs, share-based compensation for our employees and consultants, costs related to regulatory affairs and intellectual property, as well as depreciation for assets used in research and development activities.

We typically use our employee, consultant and infrastructure resources across our research and development programs. We track by program the directly attributable costs from CROs and consultants.

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The following table provides a breakdown of our outsourced research and development costs that are directly attributable to the specified programs for the years ended December 31, 2023, 2022 and 2021:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the years ended December 31,
​ |  | 2023 |  | 2022 |  | 2021
​ |  | (CHF in thousands, unaudited)
Dipraglurant PD-LID |  | (99) |  | 5,984 |  | 5,455
Dipraglurant blepharospasm | ​ | — | ​ | 632 | ​ | 720
GABAB PAM |  | 1,042 |  | 1,267 |  | 1,513
M4 PAM | ​ | 1,518 | ​ | 1,228 | ​ | 403
Other discovery programs |  | 287 |  | 919 |  | 923
Total outsourced research and development costs |  | 2,748 |  | 10,030 |  | 9,014

​

On June 17, 2022, we terminated our dipraglurant United States registration program including pivotal Phase 2B/3 and open label clinical trials in PD-LID due to slow recruitment of patients. Therefore, we experienced a decrease in our outsourced R&D costs in the twelve-month period ended December 31, 2023 compared to the twelve month period ended December 31, 2022. We expect a significant decrease in our research and development expenses in the near term compared to the expenses incurred in the twelve-month period ended December 31, 2023 as a result of the Neurosterix transaction, in which our internal preclinical programs, including our M4 PAM program, was sold to Neurosterix. We have no ongoing self-funded clinical studies. In the medium and long term, our expenses may increase to pre-Neurosterix transaction levels, particularly as we continue to the development of a GABAB PAM drug candidate, initiate further clinical trials and seek marketing approval for our drug candidates.

At this time, we cannot reasonably estimate or know the nature, timing and estimated costs of the efforts that will be necessary to complete the development of our drug candidates. We are also unable to predict when, if ever, material net cash inflows will commence from sales of our drug candidates. This is due to the numerous risks and uncertainties associated with developing such drug candidates, including:

| ● | uncertainty related to discovering clinical candidates;

| ● | uncertainty related to efficiently manufacturing and distributing drug products;

| ● | competitor intellectual property restraining our freedom to operate; and

| ● | timing of initiation, completion and outcome of further clinical trials;

In addition, the probability of success for any of our drug candidates will depend on numerous factors, including competition, manufacturing capabilities and commercial viability. A change in the outcome of any of these variables with respect to the development of any of our drug candidates would significantly change the costs, timing and viability associated with the development of that drug candidate.

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General and Administrative Costs

General and administrative costs consist primarily of personnel costs, including salaries, benefits and share-based compensation cost for our employees as well as corporate facility costs not otherwise included in research and development expenses, legal fees related to corporate matters and fees for accounting and financial or tax consulting services.

We expect a decrease in our general and administrative costs in the near future as a result of the Neurosterix transaction. In the medium and long term, our expenses may increase to pre-Neurosterix transaction levels.

Finance Result, Net

Finance result, net consists mainly of currency exchange differences, interest expenses relating to lease liabilities, and to the negative interest rate on Swiss franc cash deposits, partially offset by positive interest income on USD bank deposits.

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Taxation

We are subject to corporate taxation in Switzerland, United States and France. We are also entitled under Swiss laws to carry forward any losses incurred for a period of seven years and can offset our losses carried forward against future taxes. As of December 31, 2023, we had tax losses carried forward totaling CHF 153.5 million of which CHF 0.3 million will expire by the end of 2024. Deferred income taxes are not recognized as we do not believe it is probable that we will generate sufficient taxable profits to utilize these tax losses carried forward.

A. Operating Results

Analysis of Results of Operations

The following table presents our consolidated results of operations for the fiscal years 2023, 2022 and 2021.

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the years ended December 31,
​ |  | 2023 |  | 2022 |  | 2021
​ |  | (CHF in thousands, unaudited)
Revenue |  | 1,613 |  | 1,422 |  | 2,916
Other Income |  | 34 |  | 23 |  | 237
Research and development costs |  | (6,962) |  | (14,665) |  | (12,840)
General and administrative costs |  | (4,966) |  | (7,300) |  | (5,819)
Operating loss |  | (10,281) |  | (20,520) |  | (15,506)
Finance income |  | 64 |  | 29 |  | 217
Finance expense |  | (339) |  | (313) |  | (63)
Net loss |  | (10,556) |  | (20,804) |  | (15,352)

​

Year Ended December 31, 2023 Compared to Year Ended December 31, 2022

Revenue

The following table sets forth our revenue in 2023 and 2022.

​ | ​ | ​ | ​ | ​
​ |  | For the years
​ | ​ | ended
​ | ​ | December 31,
​ | ​ | 2023 | ​ | 2022
​ | ​ | (CHF in thousands)
Collaborative research funding | ​ | 1,613 | ​ | 1,422
Total |  | 1,613 |  | 1,422

​

Revenue increased by CHF 0.2 million in 2023 compared to 2022 due to amounts received under our agreement with Indivior which are recognized as related costs are incurred.

Other Income

The following table sets forth our other income in 2023 and 2022.

​ | ​ | ​ | ​ | ​
​ |  | For the years
​ | ​ | ended
​ | ​ | December 31,
​ | ​ | 2023 | ​ | 2022
​ | ​ | (CHF in thousands)
Research grants | ​ | 30 | ​ | —
Other service income | ​ | 4 | ​ | 23
Total |  | 34 |  | 23

​

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Other income was close to nil in 2023 and 2022. Other income recognized primarily related to Eurostars/Innosuisse’s grant recognized as costs are incurred in accordance with the grant conditions in 2023 and to IT consulting services in 2022.

Research and Development Expenses

The following table sets forth our research and development expenses in 2023 and 2022.

​ | ​ | ​ | ​ | ​
​ | ​ | For the years
​ | ​ | ended
​ | ​ | December 31,
​ |  | 2023 |  | 2022
​ | ​ | (CHF in thousands, unaudited)
Dipraglurant PD‑LID |  | (99) |  | 5,984
Dipraglurant blepharospasm |  | — |  | 632
GABAB PAM |  | 1,042 |  | 1,267
M4 PAM |  | 1,518 |  | 1,228
Other discovery programs |  | 287 |  | 919
Subtotal outsourced R&D per program |  | 2,748 |  | 10,030
Staff costs |  | 2,912 |  | 3,358
Depreciation and amortization |  | 245 |  | 256
Laboratory consumables |  | 331 |  | 319
Patent maintenance and registration costs |  | 370 |  | 318
Short‑term leases |  | 27 |  | 42
Other operating expenses |  | 329 |  | 342
Subtotal unallocated R&D expenses |  | 4,214 |  | 4,635
Total |  | 6,962 |  | 14,665

​

Research and development expenses decreased by CHF 7.7 million in 2023 compared to 2022, mainly due to decreased outsourced R&D costs for CHF 7.3 million attributed to reduced dipraglurant clinical development activities terminated on June 17, 2022. Changes in estimates of costs to terminate the dipraglurant clinical development resulted in the release of CHF 0.2 million of previously recorded accruals resulting in a credit to dipraglurant related R&D costs. During the same period, staff costs decreased by CHF 0.4 million primarily due to decreased share-based compensation costs.

General and Administrative Costs

The following table sets forth our general and administrative costs in 2023 and 2022.

​ | ​ | ​ | ​ | ​
​ | ​ | For the years
​ | ​ | ended
​ | ​ | December 31,
​ | ​ | 2023 |  | 2022
​ | ​ | (CHF in thousands, unaudited)
Staff costs |  | 2,465 |  | 3,695
Depreciation and amortization |  | 61 |  | 68
Professional fees |  | 1,164 |  | 1,424
Short‑term leases |  | 8 |  | 5
D&O insurance |  | 629 |  | 1,591
Other operating costs |  | 639 |  | 517
Total |  | 4,966 |  | 7,300

​

General and administrative costs decreased by CHF 2.3 million in 2023 compared to 2022, primarily due to decreased D&O insurance costs of CHF 1.0 million and decreased staff costs primarily driven by reduced share-based service costs of CHF 1.1 million.

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Finance Result, Net

The following table sets forth our finance result net in 2023 and 2022.

​ | ​ | ​ | ​ | ​
​ |  | For the years
​ | ​ | ended
​ | ​ | December 31,
​ | ​ | 2023 |  | 2022
​ | ​ | (CHF in thousands)
Interest income |  | 64 |  | 29
Interest cost |  | (2) |  | (26)
Interest expense on leases |  | (20) |  | (23)
Foreign exchange (losses), net |  | (317) |  | (264)
Total |  | (275) |  | (284)

​

Finance result, net remained stable in 2023 compared to 2022 and primarily relates to foreign exchange loss on USD cash deposits partially offset by interest income related to USD cash deposits.

Year Ended December 31, 2022 Compared to Year Ended December 31, 2021

Revenue

The following table sets forth our revenue in 2022 and 2021.

​

​ | ​ | ​ | ​ | ​
​ | ​ | For the years
​ | ​ | ended
​ | ​ | December 31,
​ |  | 2022 |  | 2021
​ |  | (CHF in thousands)
Collaborative research funding |  | 1,422 |  | 2,916
Total |  | 1,422 |  | 2,916

​

Revenue decreased by CHF 1.5 million in 2022 compared to 2021 due to amounts received under our license and research agreements with Indivior which are recognized as related costs are incurred.

Other Income

The following table sets forth the other income in 2022 and 2021.

​

​ | ​ | ​ | ​ | ​
​ | ​ | For the years
​ | ​ | ended
​ | ​ | December 31,
​ |  | 2022 |  | 2021
​ |  | (CHF in thousands)
Research grants |  | — |  | 218
Other service income |  | 23 |  | 19
Total |  | 23 |  | 237

​

Other income, decreased by CHF 0.2 million in 2022 compared to 2021 as we did not recognize any income from the grant with Eurostars/Innosuisse in 2022, in accordance with the grant conditions. Other service income relates to IT consultancy agreements.

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Research and Development Expenses

The following table sets forth our research and development expenses in 2022 and 2021.

​

​ | ​ | ​ | ​ | ​
​ | ​ | For the years
​ | ​ | ended
​ | ​ | December 31,
​ |  | 2022 |  | 2021
​ |  | (CHF in thousands,
​ |  | unaudited)
Dipraglurant PD-LID |  | 5,984 |  | 5,455
Dipraglurant blepharospasm | ​ | 632 | ​ | 720
GABAB PAM |  | 1,267 |  | 1,513
M4 PAM | ​ | 1,228 | ​ | 403
Other discovery programs |  | 919 |  | 923
Subtotal outsourced R&D per program |  | 10,030 |  | 9,014
Staff costs |  | 3,358 |  | 2,587
Depreciation and amortization |  | 256 |  | 273
Laboratory consumables |  | 319 |  | 295
Patent maintenance and registration costs |  | 318 |  | 266
Short-term leases |  | 42 |  | 22
Other operating expenses |  | 342 |  | 383
Subtotal unallocated R&D expenses |  | 4,635 |  | 3,826
Total |  | 14,665 |  | 12,840

​

Research and development costs increased by CHF 1.8 million in 2022 compared to 2021 primarily due to higher outsourced R&D expenses of CHF 1.0 million including CHF 0.6 million for discovery activities and CHF 0.4 million for dipraglurant clinical development activities. During the same period, staff costs primarily driven by the evolution of higher share-based compensation costs, increased by CHF 0.8 million.

General and Administrative Costs

The following table sets forth our general and administrative costs in 2022 and 2021.

​

​ | ​ | ​ | ​ | ​
​ |  | For the years
​ | ​ | ended
​ | ​ | December 31,
​ |  | 2022 |  | 2021
​ |  | (CHF in thousands,
​ |  | unaudited)
Staff costs |  | 3,695 |  | 2,150
Depreciation and amortization |  | 68 |  | 74
Professional fees |  | 1,424 |  | 1,380
Short‑term leases |  | 5 |  | 16
D&O Insurance |  | 1,591 |  | 1,592
Other operating costs |  | 517 |  | 607
Total |  | 7,300 |  | 5,819

​

General and administrative costs increased by CHF 1.5 million in 2022 compared to 2021. The increase primarily relates to staff costs for CHF 1.5 million driven by higher share-based compensation costs.

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Finance Result, Net

The following table sets forth our finance result net in 2022 and 2021.

​

​ | ​ | ​ | ​ | ​
​ | ​ | For the years
​ | ​ | ended
​ | ​ | December 31,
​ |  | 2022 |  | 2021
​ |  | (CHF in thousands)
Interest income |  | 29 |  | 5
Interest cost |  | (26) |  | (39)
Interest expense on leases |  | (23) |  | (24)
Foreign exchange gains/(losses), net |  | (264) |  | 212
Total |  | (284) |  | 154

​

Finance result, net decreased by CHF 0.4 million in 2022 compared to 2021 mainly due to a net currency exchange loss of CHF 0.3 million in 2022 compared to a net currency exchange gain of CHF 0.2 million in 2021 primarily due to currency exchange differences on U.S dollar cash deposits due to the strengthening of the Swiss franc.

B. | Liquidity and Capital Resources

Since our inception through December 31, 2023, we have generated CHF 66.4 million of revenue and have incurred net losses and negative cash flows from our operations. We have funded our operations primarily through the sale of equity. From inception through December 31, 2023, we raised an aggregate of CHF 355.2 million of gross proceeds from the sale of equity. As at December 31, 2023, we had CHF 3.9 million in cash and cash equivalents. Between the closing date and the issuance date of our Annual Report on Form 20-F, we have raised a total of CHF 5.2 million including CHF 5.0 million from the sale of our allosteric modulator drug discovery technology platform and a portfolio of preclinical programs to Neurosterix and CHF 0.2 million under our sale agency agreement with Kepler Cheuvreux.

Our primary uses of cash are to fund operating expenses, which consist mainly of research and development expenditures and associated general and administrative costs. Cash used to fund operating expenses is impacted by the timing of when we pay these expenses, as reflected in the changes in our outstanding accounts payable and accrued expenses. We currently have no ongoing material financing commitments, such as lines of credit or guarantees.

We expect a significant decrease of our expenses in the near term compared to the expenses incurred in the twelve-month period ended December 31, 2023, as we sold our allosteric modulator drug discovery technology platform and a portfolio of pre-clinical programs to Neurosterix on April 2, 2024 (See Item 8-B – significant changes) and we have no ongoing self-funded clinical studies. In the medium and long term, our expenses may increase to pre-Neurosterix transaction levels, particularly as we continue to the development of our GABAB PAM chronic cough drug candidate, initiate further clinical trials and seek marketing approval for our drug candidates.

In addition, if we obtain marketing approval for any of our drug candidates, we expect to incur significant commercialization expenses related to program sales, marketing, manufacturing and distribution to the extent that such sales, marketing and distribution are not the responsibility of potential collaborators. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when needed or on attractive terms, we would be forced to delay, reduce or eliminate our research and development programs or future commercialization efforts.

We expect our existing cash and cash equivalents at the issuance date of Annual Report on Form 20-F will enable us to fund our operating expenses and capital expenditure requirements through 2026. Our future viability is dependent on our ability to monetize our intellectual property portfolio and /or raise additional capital though public or private financings that may dilute existing shareholders. We have based this estimate on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we currently expect. Our future capital requirements will depend on many factors, including:

| ● | the scope, progress, results and costs of our ongoing and planned preclinical study for our GABAB PAM cough indication drug candidate;

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| ● | the timing and amount of milestone and royalty payments we may receive under our license agreements;

| ● | the extent to which we out-license, in-license, sell or acquire other drug candidates and technologies;

| ● | the number and development requirements of other drug candidates that we may pursue;

| ● | the costs, timing and outcome of regulatory review of our drug candidates;

| ● | cost associated with finding alternative suppliers due to geopolitical events such as the ongoing war in Ukraine;

| ● | the costs associated with building out our operations; and

| ● | the costs and timing of future commercialization activities, including drug manufacturing, marketing, sales and distribution, for any of our drug candidates for which we receive marketing approval.

Identifying potential drug candidates and conducting preclinical studies and clinical trials is a time-consuming, expensive and uncertain process that takes many years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve product sales. In addition, our drug candidates, if approved, may not achieve commercial success. Our revenue, if any, will be derived from sales of products that we do not expect to be commercially available for many years, if at all.

Until such time, if ever, as we can generate substantial product revenue, we may finance our cash needs through a combination of equity offerings, debt financings, collaborations, strategic alliances and licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms of any additional securities may include liquidation or other preferences that adversely affect your rights as a shareholder. Debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends.

If we raise funds through additional collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or drug candidates or to grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market drug candidates that we would otherwise prefer to develop and market ourselves.

The following table shows a summary of our cash flows for the years indicated:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the years ended December 31,
​ |  | 2023 |  | 2022 |  | 2021
​ |  | (CHF in thousands)
Cash and cash equivalents at the beginning of the year |  | 6,957 |  | 20,485 |  | 18,695
Net cash flows used in operating activities |  | (7,992) |  | (16,437) |  | (14,705)
Net cash flows from /(used in) investing activities |  | (7) |  | 3 |  | (30)
Net cash flows from financing activities |  | 5,264 |  | 3,102 |  | 16,403
Increase/(Decrease) in cash and cash equivalents. |  | (2,735) |  | (13,332) |  | 1,668
Effect of the exchange rates |  | (357) |  | (196) |  | 122
Cash and cash equivalents at end of year |  | 3,865 |  | 6,957 |  | 20,485

​

Operating Activities

Net cash flows from or used in operating activities consist of the net loss adjusted for changes in net working capital (current assets less current liabilities), and for non-cash items such as depreciation, the value of share-based services and changes in post-employment benefits.

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During the year ended December 31, 2023, operating activities used CHF 8.0 million of cash primarily due to our net loss of CHF 10.6 million adjusted for CHF 0.3 million of net finance costs and CHF 0.2 million of decreased net working capital, partially offset by non-cash items of CHF 2.0 million including CHF 1.8 million of share-based compensation costs and CHF 0.3 million of depreciation of the right-of-use assets of leases. The decrease of the net working capital primarily relates to decreased trade receivables, prepayments and contract assets for a cumulative amount of CHF 0.5 million and increased deferred income of CHF 0.3 million related to funds received from Innosuisse/Eurostar’s grant, partially offset by decreased payables and accruals of CHF 0.6 million.

During the year ended December 31, 2022, operating activities used CHF 16.4 million of cash primarily due to our net loss of CHF 20.8 million adjusted for CHF 0.2 million of decreased net working capital and CHF 0.2 million of net finance costs, partially offset by non-cash items for CHF 4.0 million including CHF 3.7 million of share-based compensation costs and CHF 0.3 million of depreciation of the right-of-use assets for leases. Changes in net working capital mainly relate to decreased prepayments due to the termination of our dipraglurant clinical development activities.

During the year ended December 31, 2021, operating activities used CHF 14.7 million of cash primarily due to our net loss of CHF 15.4 million adjusted for CHF 0.6 million of increased net working capital and a net finance income of CHF 0.1 million primarily related to currency exchange gains on cash and cash equivalents, partially offset by non-cash items for CHF 1.4 million mainly related to the value of share-based services and depreciation of the right-of-use assets for leases. Changes in net working capital mainly relate to increased prepayments on our dipraglurant PD-LID program.

Investing Activities

Net cash used in investing activities consist primarily of investments in computer and laboratory equipment, security rental deposits related to laboratory and office space.

During the year ended December 31, 2023, 2022 and 2021 investing activities were close to nil and primarily related to investments in our laboratory equipment and to a lesser extent computer hardware.

Financing Activities

Net cash flows from financing activities consists of proceeds from the sale of equity securities, whilst net cash flows used in financing activities primarily relate to the principal element of lease payments and associated interest expenses, interest expenses on Swiss francs cash deposits and capital increase costs.

During the year ended December 31, 2023, net cash flows from financing activities amounted to CHF 5.3 million including CHF 4.5 million from the offering executed with an institutional investor on April 3, 2023 and CHF 1.2 million from the sale agency agreement managed by Kepler Cheuvreux, partially offset by costs associated with the offering, the sale and the issuance of treasury shares whose combined amount paid during the annual year ended December 31, 2023 amounted to CHF 0.3 million and CHF 0.3 million for the principal element of lease payments.

During the year ended December 31, 2022, net cash flows from financing activities amounted to CHF 3.1 million and relate to an offering executed on July 22, 2022 with an institutional investor and sales of treasury shares through the sale agency agreement with Kepler Cheuvreux in July 2022 with gross proceed of CHF 4.1 million and CHF 0.4 million, respectively, partially offset by the costs associated with the offering executed on December 16, 2021 and July 22, 2022 and paid in 2022 for CHF 0.5 million and CHF 0.4 million, respectively. The other cash out flows primarily relate to the principal element of lease payments and associated interest expense for CHF 0.3 million and issuance cost of new treasury shares executed in 2022 for a total amount of CHF 0.2 million.

During the year ended December 31, 2021, net cash flows from financing activities amounted to CHF 16.4 million and primarily relate to offerings executed on January 8, 2021 and December 16, 2021, with a respective gross proceed of CHF 10.1 million and CHF 9.2 million partially offset by total offering costs of CHF 3.3 million of which CHF 0.2 million was paid in December 2020 and CHF 0.5 million remained payable as of December 31, 2021. The other cash out flows primarily relate to the principal element of lease payments and associated interest expense for CHF 0.4 million.

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Lease liabilities and commitments

The maturities for lease payments in relation to operating lease under IFRS 16 as of December 31, 2023 are as follows:

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Carrying
​ |  | Less than |  | 1 to |  | More than |  | Total cash |  | amount
At December 31 2023 | ​ | 1 Year | ​ | 5 Years | ​ | 5 Years | ​ | out flows | ​ | liabilities
​ | ​ | (CHF in thousands)
Lease Liabilities |  | 294 |  | 72 |  | — |  | 366 |  | 344

​

Lease liabilities relate to the rent of laboratories, equipment, offices and related spaces used by us. There are no cancellable operating lease commitments over 5 years. Our office and laboratory spaces at Campus Biotech have been transferred to Neurosterix Pharma Sàrl on April 2, 2024. Under the service agreement signed with Neurosterix Pharma Sàrl, we have access to administrative offices now leased by Neurosterix. (See Item 8 - B significant changes).

We enter into contracts in the normal course of business with CROs for preclinical studies, manufacturing and other services and products for operating purposes. These contracts generally provide for termination upon notice, and therefore we believe that our non-cancelable obligations under these agreements are not material.

Outstanding Debt

We do not engage in trading activities involving non-exchange traded contracts nor do we currently have any debt outstanding. We therefore believe that we are not materially exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in these relationships.

C. | Research and Development

For a discussion of our research and development activities, see “Item 4.B—Business Overview” and “Item 5.A—Operating Results.”

D. | Trend Information

For a discussion of trends, see “Item 5.A—Operating Results” and “Item 5.B—Liquidity and Capital Resources.”

E. | Critical Accounting Estimates

Not applicable

Item 6. Directors, Senior Management and Employees.

A. | Directors and Senior Management.

The following table sets forth information regarding our executive officers and directors, including their ages, as of December 31, 2023. Our directors are appointed for one-year terms, which expire on the occasion of each annual general meeting. Accordingly, the terms of the directors set forth below will expire on the date of our 2024 annual general meeting of shareholders. On April 2, 2024, all Addex employees, other than Mr. Teyssédou, became employees of Neurosterix. Pursuant to a service agreement, certain former Addex employees, including our Chief Executive Officer, will dedicate a portion of their time to Addex in 2024. Such

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Neurosterix employees will retain their former titles and responsibilities at Addex, other than Dr. Rocher and Dr. Lutjens, who have stepped down from their Addex positions.

​

​ | ​ | ​ | ​ | ​
Name |  | Age |  | Position(s)
Executive Officers: | ​ |  | ​ |
Tim Dyer |  | 55 |  | Chief Executive Officer and Director
Roger Mills |  | 67 |  | Chief Medical Officer and Director
Robert Lütjens(1) |  | 54 |  | Head of Discovery—Biology
Jean-Philippe Rocher(1) | ​ | 64 | ​ | Head of Discovery—Chemistry
Mikhail Kalinichev |  | 56 |  | Head of Translational Science
Lénaïc Teyssédou(2) |  | 38 |  | Head of Finance
Non-Employee Directors: |  | ​ |  | ​
Vincent Lawton(3)(4) |  | 74 |  | Chairman of the Board of Directors
Raymond Hill(3) |  | 78 |  | Director
Isaac Manke(4) |  | 46 |  | Director
Jake Nunn(4) |  | 53 |  | Director

(1)Dr Jean-Philippe Rocher and Dr Robert Lütjens stepped down from the Executive Management on April 2, 2024

(2)Mr. Teyssédou became a member of the Executive Management on April 2, 2024

(3)Member of the Compensation Committee

(4)Member of the Audit Committee

Executive Officers

Tim Dyer, Co-Founder, Director and Chief Executive Officer: Since co-founding Addex in 2002, Mr. Dyer has played a pivotal role in building the Addex Group, raising significant capital, including Addex IPO and negotiating licensing agreements with pharmaceutical industry partners. Prior to founding Addex, he spent 10 years with Price Waterhouse, or PW & PricewaterhouseCoopers, or PwC in the UK and Switzerland as part of the audit and business advisory group. At PwC in Switzerland, Mr. Dyer’s responsibilities included managing the service delivery to a diverse portfolio of clients including high growth start-up companies, international financial institutions and venture capital and investment companies. Mr. Dyer has extensive experience in finance, corporate development, business operations and the building of start-up companies. In April 2024, Mr Dyer was appointed as a Director and Chief Executive Officer of Neurosterix Group, a drug development company in which Addex holds a 20% equit interest. He is a UK Chartered Accountant and holds a BSc (Hons) in Biochemistry and Pharmacology from the University of Southampton, UK.

​

Roger Mills, Director and Chief Medical Officer: Dr. Mills brings more than 30 years of biopharmaceutical industry experience at both large global pharmaceutical companies and smaller biotechnology companies, including Acadia Pharmaceuticals, Pfizer, Gilead Sciences, Abbott Laboratories and The Wellcome Foundation, across a spectrum of disease areas. His extensive track record includes managing drug development programs, including IND’s and NDAs as well as post-marketing and OTC products. Most recently, Dr. Mills was with Acadia Pharmaceuticals for nine years, serving as Executive Vice President, Development and Chief Medical Officer. In this role, he oversaw the largest ever international Phase 3 program in Parkinson’s Disease Psychosis and led its NDA submission to the FDA for NUPLAZID, which was subsequently approved and remains the first and only medication approved in this indication. Dr. Mills currently serves as an Honorary Professor at the University of Exeter, UK. He is a member of the Board of Directors of Enterin Inc, a United States biopharmaceutical company. He received his medical degree from Imperial College, Charing Cross Hospital Medical School, London, United Kingdom.

Robert Lütjens, Head of Discovery—Biology: Dr. Lütjens was responsible for all biology activities and has extensive experience in drug discovery. He established the biology capabilities and built the Company’s small molecule allosteric modulator biology platform. He played a pivotal role in the success of both internal and partnered programs, including the discovery of dipraglurant and ADX71149, both of which progressed into Phase II clinical development. Prior to joining Addex at inception in 2002, Dr. Lütjens completed a postdoctoral fellowship in the Department of Neuropharmacology at the Scripps Research Institute, in La Jolla, CA, where he focused on understanding molecular changes involved in addiction disorders. Dr. Lütjens obtained his degrees in Biology from the University of Geneva, his master’s at the Swiss Institute for Experimental Cancer Research and his Ph.D. thesis at the Glaxo Institute for Molecular Biology in Geneva and the Institute for Cellular Biology and Morphology in Lausanne. Dr. Lütjens is co-author of over 30 peer-reviewed publications and patents.

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Jean-Philippe Rocher, Head of Discovery—Chemistry: Dr. Rocher was responsible for IP and for all chemistry activities including CMC, scale-up and formulation, medicinal chemistry, computational chemistry, compound library management and activities linked to developability. He has extensive experience in drug discovery and returns to Addex from Pierre Fabre where he was Director of CNS Programs from March 2014 to May 2018. Joining Addex at its inception in 2002, Dr. Rocher established the Company’s chemistry capabilities and built its small molecule allosteric modulator chemistry platform. He played a pivotal role in the success of both internal and partnered programs, including the discovery of dipraglurant and ADX71149, both of which progressed into Phase 2 clinical development. Prior to joining Addex, Dr. Rocher was Director of Chemistry at Devgen NV (Gent, Belgium), Senior Research Scientist for GlaxoSmithKline KK (Tsukuba, Japan), Scientific Project Leader in CNS at Mitsubishi Tanabe (Yokohama, Japan) and Head of Drug Discovery Unit for Battelle (Geneva, Switzerland). He started his career as a Research Scientist in the Dermatology Research Center of Galderma (Sophia-Antipolis, France) following a PhD in Medicinal Chemistry and Pharm D at the Faculty of Pharmacy of Lyon (France). He is a co-author of more than 40 research publications and patents.

Mikhail Kalinichev, Head of Translational Science: This is the second time Dr. Kalinichev is a part of Addex team, as previously, he spent 4 years in the company in several positions, including Associate Director and Group Leader, Behavioral Neuroscience. Immediately before his second appointment at Addex, Dr. Kalinichev spent 6 years as Director of in vivo neurology at Ipsen, France. In this role, he helped define the neuroscience therapeutic strategy, led operational activities and initiated several industrial and academic collaborations in the area of neuromuscular disorders and pain. Before Ipsen, he was a section head at Lundbeck, Denmark where he helped drive translational studies in schizophrenia, cognitive impairment and pain. His first role in pharmaceutical industry was as a principal scientist at Psychiatry Center of Excellence of GlaxoSmithKline, UK. Dr. Kalinichev’s post-doctoral training was at the Department of Pharmacology, Emory University School of Medicine (United States). Dr. Kalinichev has been awarded several prestigious awards, including the Vernalis Prize of the British Association for Psychopharmacology and the GlaxoSmithKline Exceptional Science Award. He is inventor on several patents and co-authored more than 50 papers. Dr. Kalinichev earned his PhD in behavioral neuroscience at Rutgers University (USA).

Lénaic Teyssédou, Head of Finance: Mr. Teyssédou is responsible for finance since 2017 and has extensive experience in the financial management of both private and public companies. Mr. Teyssédou is a French certified public accountant and worked in audit firms where he gained valuable experience related to audit, due diligence, financial regulation and compliance across a diverse client portfolio of startups, small and middle size companies. Mr Teyssédou also holds two master’s degrees in Finance and Management from EM Strasbourg Business School, France.

Non-Employee Directors

Vincent Lawton, Chairman of the Board of Directors: Dr. Lawton was Vice President Merck Europe and Managing Director of MSD UK until he stepped down in 2006, after 26 years’ service internationally for Merck & Co Inc. He was appointed CBE (Commander of the British Empire) by the Queen of England for services to the Pharmaceutical Industry. During his tenure, MSD UK achieved sustained commercial success, launching many new medicines to the market in a wide range of therapeutic areas, becoming the fastest growing company in the market over a number of years. He worked in commercial, research and senior management roles in France, the United States and Canada, Spain and throughout Europe. As President of the UK Industry Association, the ABPI, he negotiated industry pricing, worked with Government bodies to help establish the UK globally as a leading center of clinical research. He served on the board of the UK regulatory authority (MHRA) from 2008 to 2015. He was a Senior Strategy Advisor for Imperial College Department of Medicine, University of London and serves as a consultant to a number of leading healthcare organizations. He studied Psychology at the University of London and holds an undergraduate degree and PhD.

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Raymond Hill, Director: Dr. Hill was previously a member of the Board of Directors from the Annual General Meetings of 2008 until 2012. Currently Visiting Professor of Pharmacology at Imperial College in London, and Chairman/Non-Executive Director of Avilex (Denmark), Chair of SAB Asceneuron (Switzerland) and was NED of Orexo AB (Sweden) from 2008 to 2019. Prior to his retirement, he was Executive Director, Licensing and External Research at Merck/MSD in Europe (2002 - 2008); Executive Director, Pharmacology (1990-2002) at the Merck Neuroscience Research Centre and had oversight responsibility for Neuroscience research at the Banyu Research Labs in Tsukuba, Japan (1997-2002). At Merck, he chaired a number of discovery project teams including those responsible for the marketed products Maxalt® and Emend®. Dr. Hill received his academic training (BPharm PhD) at the University of London. He was awarded an Honorary DSc by the University of Bradford in 2004 and was elected to Fellowship of the Academy of Medical Sciences in 2005. He was a lecturer in Pharmacology at the University of Bristol School of Medicine from 1974 to 1983 and supervisor in Pharmacology at Downing College, University of Cambridge from 1983 to 1988. He joined the pharmaceutical industry in 1983 as Head of Biology and founder member of the Park Davis Research Unit at Cambridge. In 1988, he joined SK&F (United Kingdom) as Group Director of Pharmacology and in 1990 moved to Merck. He is a past Council Member of the UK Academy of Medical Sciences and President Emeritus of the British Pharmacological Society. He is a Visiting Professor at the University of Bristol and was a member of the UK Government Advisory Council on the Misuse of Drugs from 2010 to 2019.

​

Isaac Manke, Director: Dr. Manke has more than 15 years of experience in the life science industry as an investor, research analyst, consultant and scientist. Isaac is currently a General Partner at Acorn Bioventures, where he focuses on investing in small-cap public and private biotechnology companies. Prior to Acorn, Isaac spent 11 years at New Leaf Venture Partners (NLV). In addition to private venture investments, during his time at NLV, he also led the firm’s public investment activities initially with the public portfolio within NLV-II, and from 2014 through 2019, had day-to-day management and oversight responsibility for the NLV Biopharma Opportunities Funds. Isaac has been a board member or observer for several companies, including the boards of True North Therapeutics (acquired by Bioverativ) and Karos Pharmaceuticals (acquired by an undisclosed company). Previously, Isaac was an Associate in the Global Biotechnology Equity Research group at Sanford C. Bernstein. Isaac was also an Associate in the Biotechnology Equity Research group at Deutsche Bank and was a Senior Analyst at Health Advances, a biopharmaceutical and medical device strategy consulting firm. Isaac received a B.A. in Biology and a B.A. in Chemistry at Minnesota State University (Moorhead), and a Ph.D. in Biophysical Chemistry and Molecular Structure at the Massachusetts Institute of Technology, or MIT. Isaac’s discoveries led to several publications in top journals, including Science and Cell, and were selected by Science as one of the “2003: Signaling Breakthroughs of the Year”. These discoveries also resulted in four issued patents.

​

Jake Nunn, Director: Mr. Nunn has more than 25 years of experience in the life science industry as an investor, independent director, research analyst and investment banker. He is currently an independent advisor to life science companies and a venture partner at SR One Capital Management. Mr. Nunn was previously a venture advisor at New Enterprise Associates, or NEA, where he was a partner from 2006 to 2018, focusing on later-stage specialty pharmaceuticals, biotechnology and medical device investments and managing a number of NEA’s public investments in healthcare. Mr. Nunn is a Director of Regulus Therapeutics (Nasdaq: RGLS) and Trevena, Inc. (Nasdaq: TRVN). He previously was a Director of Dermira Inc. (acquired by Eli Lilly), Hyperion Therapeutics (acquired by Horizon Pharma PLC), TriVascular (acquired by Endologix), Aciex Therapeutics (acquired by Nicox SA), Transcept Pharmaceuticals (merged with Paratek) and a board observer at Vertiflex, Inc. (acquired by Boston Scientific). Prior to NEA, Mr. Nunn worked at MPM Capital as a Partner with the MPM BioEquities Fund, where he specialized in public, PIPE and mezzanine-stage life sciences investing. Previously, he was a healthcare research analyst and portfolio manager at Franklin Templeton Investments. Mr. Nunn was also an investment banker with Alex. Brown & Sons. He received an MBA from the Stanford Graduate School of Business and an AB in Economics from Dartmouth College. Mr. Nunn holds the Chartered Financial Analyst designation, is a member of the CFA Society of San Francisco, and recently completed the Stanford GSB Directors’ Consortium executive education program.

The table below provides certain highlights of the composition of our board members and nominees. Each of the categories listed in the below table has the meaning as it is used in Nasdaq Rule 5605(f).

​ |  |  |  |  | ​ | ​ | ​ | ​
Board Diversity Matrix
Country of Principle Executive Offices: | Switzerland
Foreign Private Issuer | Yes
Disclosure Prohibited under Home Country Law | No
​ | As of 04/18/2024 | 12/21/2023
Total Number of Directors | 6 | 6

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​ | Female | Male | Non-Binary | Did not Disclose | Female | Male | Non-Binary | Did not Disclose Gender
Part I: Gender Identity | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Directors | 0 | 6 | 0 | 0 | 0 | 6 | 0 | 0
Part II: Demographic Background | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Underrepresented Individual in Home Country Jurisdiction | 0 | 0
LGBTQ+ | 0 | 0
Did Not Disclose Demographic Background | 0 | 0

​

As of December 21, 2023 and April 18, 2024 respectively, our Board of Directors does not include two diverse directors due to the current financial situation which makes very challenging to attract qualified board members including those who would qualify as diverse.

​

Family Relationships

There are no family relationships among any of our executive officers or directors.

B. | Compensation of Executive Officers and Directors

Board of Directors

The compensation of the non-executive board members mostly includes variable elements whilst executive board members are not remunerated as board member. The fixed element comprises a fixed annual monetary compensation per Board term from one general meeting of shareholders to the next. The variable element comprises a monetary compensation based on Board meeting attendance and the fair value of equity incentive units (share options and equity sharing certificates) and represents from 50% to 350% of fixed annual compensation. Nevertheless, in 2022, the variable compensation of the chairman of the Board of Directors and of the chairman of the compensation committee represented fourteen and thirteen time their fixed annual compensation respectively, primarily due to the increased fair value of their options granted as the exercise prices have been reduced (See note 14 of the audited consolidated financial statements included elsewhere in this Annual Report on Form 20-F). Social security contributions of the Company are accrued on the fixed and variable elements. Board member social security contributions are accrued on the fair value of equity incentive units. Equity incentive units are granted based on the discretion of the Board of Directors. Equity incentive units are granted to compensate for the dilutive effects of capital raising to ensure Board Members have sufficient unvested equity incentive units in accordance with external benchmarks. The most recent review of compensation for members of the Board took place in November 2023.

Executive Management

The compensation of members of the Executive Management consists of fixed and variable elements. The fixed element may include a base salary or a cash retainer paid under a consulting contract. The variable element may include performance-related cash or share based bonuses, consulting fees based on chargeable hours and equity incentive units (equity sharing certificates and share options). Company contributions to pension plans, death and invalidity insurances and social security contributions are accrued on all fixed and variable element compensation that relates to an employment relationship. Company social security contributions are accrued for all shares or equity incentive unit compensation. The amount of the fixed element depends on the position, responsibilities, experience and skills, and takes into account individual performance. The fixed element is reviewed at the end of each year by the Board. Any changes in the fixed elements are made effective in January of the following year. The variable elements are based on individual and company goals. The potential variable cash bonus is determined in the employment contract and in general is a percentage of the base salary. Where the Executive Manager has been engaged under a consulting contract, the variable element is based on the time spent at the contractually defined rate of remuneration. Every year, the Board decides on the total amount of variable elements including the amount of cash and equity incentive units to be granted for the previous year based on the achievement of Company and Individual goals. Equity incentive units are granted based on the discretion of the Board of Directors. Variable cash compensation paid to Executive Managers includes bonus and equity incentive units. The variable compensation of CEO is determined 100% based on company goals and includes a cash bonus representing from 0% to 50% of base salary and equity

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incentive units representing from 0% to 200% of base salary, exceptionally increased to seven times of base salary in 2022 primarily due to the higher fair value of his equity incentive units following the reduction of the exercise prices. Our Chief Medical Officer (“CMO”) is engaged through a consultancy agreement and invoices the company for hours worked on a monthly basis which are settled in cash. In addition, equity incentive units are granted from time to time at the discretion of the Board of Directors. The variable compensation of the other Executive Managers includes a cash bonus representing from 0% to 25% of base salary and is determined based on 20% individual goals and 80% company goals, and equity incentive units representing 0% to 100% of base salary, exceptionally increased up to 185% of base salary in 2022 primarily due to the increased fair value of their equity incentive units granted following the reduction of the exercise prices. In addition, the Board of Directors grants equity incentive units to Executive Managers to compensate for the dilutive effects of capital raising to ensure Executive Managers have sufficient unvested equity incentive units in accordance with external benchmarks.

The company goals for 2023 were established at the beginning of the year as follows:

​ | ​ | ​ | ​
Advancing pre-clinical R&D programs |  | 60 | %
Securing the Group’s financial situation |  | 35 | %
Maintain effective governance, regulation and administration |  | 5 | %

​

The individual goals of the Executive Managers for 2023 were as follows: 1) Deliver novel drug candidates weighted at 50%; 2) Develop collaborative arrangements to efficiently advance preclinical portfolio weighted at 25%; and 3) Develop novel tools to identify and characterize allosteric modulators weighted at 25%.

Equity incentive plans

The purpose of the Group’s share purchase, share option and equity sharing certificate programs (refer to note 14 of the consolidated financial statements) is to provide members of the Board of Directors, Executive Management, employees and certain consultants (together “Staff”) with an opportunity to benefit from the potential appreciation in the value of the Company’s shares, thus providing an increased incentive for participants to contribute to the future success and prosperity of the Group, enhancing the value of the shares for the benefit of the shareholders of the Group and increasing the ability of the Group to attract and retain individuals of exceptional skills. In addition, these plans provide the Group with a mechanism to engage services for non-cash consideration by settling them through a transfer of treasury shares under the share purchase plan based on predefined terms of the consulting contract. The grant of any share option or equity sharing certificate is at the discretion of the Board of Directors. Key factors considered by the Board of Directors in making grants of share options or equity sharing certificates are the amount of shareholder approved conditional capital, the benchmarking with other companies as well as individual performance (for further information on the detail and composition of the benchmark please refer to the paragraph review and approval process above). The strike price is determined by the Board of Directors and is primarily based on the closing price of the Company’s shares on the SIX Swiss Exchange on the grant date. In addition, the Group has implemented a staff retention plan which includes a deferred strike price payment plan (“DSPPP”) encouraging Board Members, Executive Managers and employees to exercise their share options or equity sharing certificates and become shareholders of the Company by allowing deferral of the obligation to pay the strike price on exercise (“Deferred Strike Price Payment Obligations”).

Indirect benefits

The Company may contribute to the pension plan and maintains certain insurance for death and invalidity for the members of the Executive Management. New entrants may be eligible for reimbursement of relocation costs, compensation for lost benefits or stock granted by a previous employer, international school for children or language courses for a limited time period. No Indirect benefits have been paid to Executive Management in 2023.

Special conditions in case of change of control

In the event of a change of control of the company, three Executive Managers are entitled to receive an amount equivalent to one time the annual gross salary and 1.5 times the targeted annual bonus 12 months after the change of control, unless they have given notice of termination or have received notice of termination for cause.

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Compensation for the financial year under review

​

Measurement basis for compensation

The measurement basis for each component of compensation is described below:

| ● | Fixed cash compensation, variable cash compensation and shares acquired under the share purchase plan: accrual basis;

| ● | Equity incentive units: fair value at the grant date in accordance with IFRS 2 valuation methodology; and

| ● | Employers’ social security: accrual basis except for equity incentive units where the notional amount is calculated based on the fair value at grant date.

​

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Compensation of the Board of Directors in 2023 and 2022

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Variable compensation
​ | ​ | ​ | ​ | ​ | ​ | number of | ​ | value of | ​ | ​
​ | ​ | Fixed | ​ | ​ | ​ | equity | ​ | equity | ​ | ​
2023 | ​ | cash | ​ | cash | ​ | incentive | ​ | incentive | ​ | Total
CHF | ​ | compensation | ​ | attendance | ​ | units(1) | ​ | units(2) | ​ | 2023
Vincent Lawton, chairman | ​ | 29,034 | ​ | 29,034 |  | 1,043,153 |  | 97,681 |  | 155,750
Raymond Hill, member | ​ | 18,231 | ​ | 18,231 |  | 567,969 |  | 53,185 |  | 89,646
Tim Dyer, member | ​ | — | ​ | — |  | — |  | — |  | —
Roger Mills, member | ​ | — | ​ | — |  | — |  | — |  | —
Jake Nunn, member | ​ | 16,370 | ​ | 16,370 |  | 91,323 |  | 8,551 |  | 41,291
Isaac Manke, member | ​ | 16,370 | ​ | 16,370 |  | 91,323 |  | 8,551 |  | 41,291
Total | ​ | 80,005 | ​ | 80,005 |  | 1,793,768 |  | 167,968 |  | 327,978

(1) Equity incentive units include share options granted during the year under the Company’s share option plan (refer to note 14 of the consolidated financial statements).

(2)Value of equity incentive units include the fair value of share options granted during the year under the Company’s share option plan amounting to CHF 149,010 and the increase of CHF 18,958 in fair value of the equity incentive units whose grant conditions have been changed during the year (Refer to note 14 of the consolidated financial statements).

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Variable compensation | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | number of | ​ | value of | ​ | ​
2022 | ​ | Fixed cash | ​ | cash | ​ | equity | ​ | equity | ​ | ​
CHF |  | compensation |  | attendance |  | incentive units(1) |  | incentive units(2) |  | Total 2022
Vincent Lawton, chairman |  | 26,330 |  | 26,330 |  | 758,317 |  | 384,587 |  | 437,247
Raymond Hill, member |  | 15,529 |  | 15,529 |  | 411,869 |  | 209,113 |  | 240,171
Tim Dyer, member |  | — |  | — |  | — |  | — |  | —
Roger Mills, member |  | — |  | — |  | — |  | — |  | —
Jake Nunn, member |  | 13,639 |  | 13,639 |  | 68,238 |  | 25,616 |  | 52,894
Isaac Manke, member |  | 13,639 |  | 13,639 |  | 68,238 |  | 25,616 |  | 52,894
Total |  | 69,137 |  | 69,137 |  | 1,306,662 |  | 644,932 |  | 783,206

(1) | Equity incentive units include share options granted during the year under the Company’s share option plan (refer to note 14 of the consolidated financial statements).

(2) | The value of the equity incentive units include the fair value of the share options granted during the year under the Company’s share option plan amounting to CHF 246,502 and the increase of CHF 398,430 in fair value of the equity incentive units whose grant conditions have been changed during the year (Refer to note 14 of the consolidated financial statements).

​

Deferred Strike Price Payment Obligations of the Board of Directors:

​

​ | ​ | ​ | ​ | ​
​ | ​ | December | ​ | December
CHF | ​ | 31, 2023 | ​ | 31, 2022
Vincent Lawton, chairman |  | 235,219 |  | 190,364
Raymond Hill, member |  | 128,106 |  | 103,683
Tim Dyer, member |  | — |  | —
Roger Mills, member |  | — |  | —
Jake Nunn, member |  | 20,598 |  | 16,671
Isaac Manke, member |  | 20,598 |  | 16,671
Total (1) |  | 404,521 |  | 327,389

(1) | The amounts reported in this table correspond to the amounts owed by members of the Board of Directors in relation to Deferred Strike Price Payment Obligations (see note 14), which may be assimilated to loans to be disclosed in this Compensation report within the meaning of the Swiss Federal Code of Obligations.

​

​

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Compensation to the Executive Management in 2023 and 2022

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Variable compensation
​ |  | ​ | ​ | ​ | ​ | number of | ​ | value of | ​ | ​
​ | ​ | Fixed | ​ | ​ | ​ | equity | ​ | equity | ​ | ​
2023 | ​ | cash | ​ | ​ | ​ | incentive | ​ | incentive | ​ | Total
CHF | ​ | compensation | ​ | Cash(4) | ​ | units (2) | ​ | units(3) | ​ | 2023
Total Executive Management (1) | ​ | 1,275,109 |  | 226,288 |  | 9,492,817 |  | 935,516 |  | 2,436,913

(1) The highest paid member of Executive Management in 2023 was the CEO, Tim Dyer, who received CHF 471,969 of fixed cash compensation, CHF 109,151 of variable cash compensation and 7,008,033 equity incentive units. The fair value of equity incentive units including accrued social charges amounted to CHF 691,031 including CHF 613,036 for equity incentive units granted during the year and CHF 77,995 relating to the change in grant conditions made during the year (see note 14).

(2) Equity incentive units include share options granted during the year under the Company’s share option plan.

(3) The value of equity incentive units include the fair value of share options granted during the year under the Company’s share option plan amounting to CHF 829,927 and the increase of CHF 105,589 in fair value of the equity incentive units whose grant conditions have been changed during the year (Refer to note 14 of the consolidated financial statements).

(4) Variable compensation in cash relates to bonuses and compensation paid to Executive Managers engaged under consulting contracts which provide for hourly and daily rates with a monthly cap.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Variable compensation |  |
​ | ​ | ​ | ​ | ​ | ​ | number of | ​ | value of | ​ | ​
2022 | ​ | Fixed cash | ​ | ​ | ​ | equity | ​ | equity | ​ | ​
CHF |  | compensation |  | Cash(4) |  | incentive units(2) |  | incentive units(3) |  | Total 2022
Total Executive Management (1) |  | 1,249,366 |  | 375,685 |  | 6,846,206 |  | 3,455,027 |  | 5,080,077

(1)The highest paid member of Executive Management in 2022 was the CEO, Tim Dyer, who received CHF 472,724 of fixed cash compensation, CHF 133,881 of variable cash compensation and 4,882,845 equity incentive units. The fair value of equity incentive units including accrued social charges amounted to CHF 2,498,459 including CHF 970,001 for equity incentive units granted during the year and CHF1,528,458 relating to the change in grant conditions made during the year (see note 14).
(2) Equity incentive units include share options granted during the year under the Company’s share option plan.
(3) The value of equity incentive units include the fair value of the share options granted during the year under the Company’s share option plan amounting to CHF 1,343,025 and the increase of CHF 2,112,002 in fair value of the equity incentive units whose grant conditions have been changed during the year (Refer to note 14 of the consolidated financial statements).
(4) Variable compensation in cash relates to bonuses and compensation paid to Executive Managers under consulting contracts, which provide for hourly and daily rates with a monthly cap.

Deferred Strike Price Payment Obligations of the Executive Management:

​

​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |  | December 31,
CHF | ​ | 2023 | ​ | 2022
Total Executive Management (1) |  | 2,119,980 |  | 1,711,789

(1)The amounts reported in this table correspond to the amounts owed by Executive Managers in relation to Deferred Strike Price Payment Obligations (see note 14), which may be assimilated to loans to be disclosed in this Compensation Report report within the meaning of the Swiss Federal Code of Obligations. The highest Deferred Strike Price Payment Obligation amounted to CHF 1,524,093 as of December 31, 2023 (CHF 1,222,748 as of December 31, 2022) and was attributable to the CEO Tim Dyer.

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Addex’s shares held by members of the Board of Directors and Executive Management

​

​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022
​ | ​ | Number of Addex’s | ​ | Number of Addex’s
​ | ​ | Shares | ​ | Shares
Tim Dyer |  | 16,848,979 |  | 9,840,946
Robert Lütjens |  | 3,005,836 |  | 1,755,612
Jean-Philippe Rocher |  | 2,541,197 |  | 1,484,231
Vincent Lawton |  | 2,507,987 |  | 1,464,834
Raymond Hill |  | 1,365,532 |  | 797,563
Roger Mills |  | 785,976 |  | 735,976
Mikhail Kalinichev |  | 306,765 |  | 179,171
Jake Nunn |  | 219,561 |  | 128,238
Isaac Manke |  | 219,561 |  | 128,238
Total |  | 27,801,394 |  | 16,514,809

​

Members of the Board and Executive Management do not hold equity incentive units as of December 31, 2023 and December 31, 2022.

​

C. | Board Practices.

Composition of our Board of Directors

Our board of directors is currently composed of six members. As a foreign private issuer, under the listing requirements and rules of Nasdaq, we are not required to have independent directors on our board of directors, except that our audit committee is required to consist fully of independent directors. However, our board of directors has determined that Vincent Lawton, Jake Nunn and Isaac Manke do not have a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of director and that each of these directors is “independent” as that term is defined under Nasdaq rules. There are no family relationships among any of our directors or senior management.

Committees of our Board of Directors

The audit committee, which consists of Vincent Lawton, Isaac Manke and Jake Nunn, assists the board of directors in overseeing our accounting and financial reporting processes. Vincent Lawton serves as chairman of the audit committee. The audit committee consists exclusively of members of our board who are financially literate, and Jake Nunn is considered an “audit committee financial expert” as defined by applicable SEC rules and has the requisite financial sophistication as defined under the applicable Nasdaq rules and regulations. Our board of directors has determined that Vincent Lawton, Isaac Manke and Jake Nunn are independent directors under Nasdaq listing rules and under Rule 10A-3 under the Exchange Act. The audit committee is governed by a charter that complies with Nasdaq rules. The audit committee’s responsibilities include:

| ● | to review and assess the effectiveness of the statutory auditors and the group auditors, in particular their independence from Addex. In connection therewith, it reviews in particular additional assignments given by the Company or its subsidiaries. It may issue binding regulations or directives in connection with such additional assignments;

| ● | to review and assess the scope and plan of the audit, the examination process and the results of the audit and to examine whether the recommendations issued by the auditors have been implemented by management;

| ● | to review the auditors’ reports, to discuss their contents with the auditors and with the management;

| ● | to approve the terms and conditions of the engagement of the auditors;

| ● | to review the effectiveness of the internal audit function, its professional qualifications, resources and independence and its cooperation with external audit;

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| ● | to approve the annual internal audit concept and the annual internal audit report, including the responses of the management thereto

| ● | to assess the risk assessment established by the management and the proposed measures to reduce risks;

| ● | to assess the state of compliance with norms within Addex;

| ● | to review in cooperation with the auditors, the CEO and Head of Finance whether the accounting principles and the financial control mechanism of Addex and its subsidiaries are appropriate in view of our size and complexity;

| ● | to review the annual and interim statutory and consolidated financial statements intended for publication. It should discuss these with the CEO and the Head of Finance and, separately, with the head of external audit;

| ● | to make a proposal to the Board with respect to these annual and interim statutory and consolidated financial statements; and

| ● | the responsibility for approving the annual financial statements remains with the Board.

Compensation Committee

The compensation committee, which consists of Vincent Lawton and Raymond Hill, advises the board in determining executive compensation. The compensation committee’s responsibilities include:

| ● | to review and assess on a regular basis the remuneration system of Addex (including the management incentive plans) and to make proposals in connection thereto to the Board;

| ● | to recommend the terms of employment, in particular the remuneration package, of the CEO and to make proposals in relation to the remuneration of Directors;

| ● | to recommend upon proposal of the CEO the terms of employment, in particular the remuneration package, of employees reporting directly to the CEO as well as review matters related to the compensation of other top managers, as well as the general employee compensation, benefit policies and HR practices of Addex; and

| ● | to make recommendations on the grant of options or other securities under any management incentive plan of Addex.

D. | Employees.

We had 23 full-time employees and consultants as of December 31, 2023. At the issuance date of this Annual Report on form 20F, we have 1 full - time employee, our Head of Finance, Lénaïc Teyssédou. Under the service agreement signed with Neurosterix, our R&D team and our CEO, Tim Dyer, who are now employed by Neurosterix, are supporting Addex commitments. In the near term, we will employ consultants for the development of our programs.

E. | Share Ownership.

For information regarding the share ownership of our directors and executive officers, see “Item 6.B—Compensation” and “Item 7.A—Major Shareholders.”

F. | Disclosure of a registrant’s action to recover erroneously awarded compensation

On November 28, 2023, the Board adopted a clawback policy to comply with the applicable provisions of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and rules and requirements of the NYSE (including Section 303A.14 of the NYSE Listed Company Manual). In the event of an accounting restatement, under the Company’s clawback policy, the Compensation Committee is authorized to recover certain incentive-based compensation paid to an executive officer of the Company on or after October 2, 2023, to the extent such incentive-based compensation was paid on the basis of financial results in respect of any of our three most recently completed fiscal years preceding the restatement.

During the period covered by this Annual Report on Form 20-F, we were not required to prepare an accounting restatement which would require recoupment of any erroneously awarded incentive compensation.

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Item 7. Major Shareholders and Related Party Transactions

A. | Major shareholders.

The following table sets forth information with respect to the beneficial ownership of our shares as of February 29, 2024 by:

| ● | each beneficial owner of 5% or more of our outstanding shares;

| ● | each of our directors and executive officers; and

| ● | all of our directors and executive officers as a group.

Beneficial ownership is determined in accordance with the rules of the SEC. These rules generally attribute beneficial ownership of securities to persons who possess sole or shared voting power or investment power with respect to those securities and include shares that can be acquired within 60 days of February 29, 2024. Percentage ownership calculations are based on 128,257,059 shares issued and outstanding, excluding 56,097,437 treasury shares indirectly held through our wholly-owned subsidiary Addex Pharma SA, as of February 29, 2024, plus consistent with SEC rules on disclosure of beneficial ownership, shares that each security holder has the ability to acquire within 60 days of February 20, 2024, due to outstanding equity interests becoming vested or exercisable. The percentage of shares beneficially owned, shown on the table, reflect these incremental shares that a security holder has the ability to acquire within the time frame noted.

​

​ | ​ | ​ | ​ | ​ | ​
​ |  | Number |  | Percentage |
​ | ​ | of shares | ​ | of shares | ​
​ | ​ | beneficially | ​ | beneficially | ​
​ |  | owned |  | owned | ​
5% or Greater Shareholders: | ​ |  | ​ |  |
Growth Equity Opportunities Fund IV, LLC (1) |  | 7,704,600 |  | 5.91 | %
Executive Officers and Directors: |  |  |  |  | ​
Tim Dyer (2) |  | 17,121,860 |  | 13.32 | %
Robert Lutjens (3) |  | 3,051,953 |  | 2.38 | %
Jean-Philippe Rocher (4) |  | 2,594,896 |  | 2.02 | %
Vincent Lawton (5) |  | 2,546,466 |  | 1.98 | %
Raymond Hill (6) |  | 1,386,483 |  | 1.08 | %
Roger Mills |  | * |  | * | ​
Isaac Manke |  | * |  | * | ​
Jake Nunn |  | * |  | * | ​
Mikhail Kalinichev | ​ | * | ​ | * | ​
Lénaïc Teyssédou |  | * |  | * | ​
All current directors and executive officers as a group (10 persons) (7) |  | 28,268,079 |  | 22.01 | %

* | Represents beneficial ownership of less than one percent.

| (1) | Consist of 5,648,690 shares and 2,055,910 shares issuable upon exercise of outstanding warrants directly held by Growth Equity Opportunities Fund IV LLC (“GEO IV”) that is wholly owned by New Enterprise Associates 15, L.P (“NEA 15”). The shares directly held by GEO IV are indirectly held by NEA 15, whose general partner is NEA Partners 15, L.P (“NEA Partners 15”). The general partner of NEA Partners 15 is NEA 15 GP, LLC (“NEA 15 LLC”). The individual Managers of NEA 15 LLC, or collectively, the NEA 15 Managers are Forest Baskett, Anthony A. Florence Jr., Mohamad Makhzoumi and Scott D.Sandell. GEO IV, NEA 15, NEA Partners 15, NEA 15 LLC and the NEA 15 Managers share voting and dispositive power with regard to our securities held directly by GEO IV. The address of Growth Equity Opportunities Fund IV LLC is c/o New Enterprise Associates, Inc., 1954 Greenspring Drive, Suite 600, Timonium, MD 21093.

| (2) | Consist of 16,848,979 shares of which 9,202,903 are not freely tradable as of February 29, 2024, and 272,881 shares issuable upon the exercise of 258,505 outstanding options and 14,376 outstanding warrants.

| (3) | Consist of 3,005,836 shares of which 1,721,493 are not freely tradable as of February 29, 2024, and 46,117 shares issuable upon the exercise of outstanding options.

| (4) | Consist of 2,541,197 shares of which 1,550,388 are not freely tradable as of February 29, 2024, and 53,699 shares issuable upon the exercise of outstanding options.

| (5) | Consist of 2,507,987 shares of which 1,377,052 are not freely tradable as of February 29, 2024, and 38,479 shares issuable upon the exercise of outstanding options.

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| (6) | Consist of 1,365,532 shares of which 749,832 are not freely tradable as of February 29, 2024, and 20,951 shares issuable upon the exercise of outstanding options.

| (7) | Consist of 27,801,394 shares of which 15,140,593 are not freely tradable as of February 29, 2024 and 466,685 shares issuable upon the exercise of 452,309 outstanding options and 14,376 warrants.

B. | Related Party Transactions.

Since January 1, 2022, we did not enter directly or indirectly into any transaction with one of our Directors or Corporate Officers. During this period, we engaged in the following transactions with (i) a company that is owned or controlled by one of our Directors or Corporate Officers (iii) a company in which one of our Directors or Corporate Officers are also a Director or Corporate Officer (iii) our major holders of more of 5% of our outstanding voting securities and their affiliates at the time or after the transaction.

Sale of our allosteric modulator drug discovery technology platform and pre-clinical programs

On April 2, 2024, we sold our allosteric modulator drug discovery technology platform and a portfolio of pre-clinical programs to Neurosterix Pharma Sàrl (Neurosterix), a new company funded by Perceptive Xontogeny Venture Fund II L.P, Perceptive Life Sciences Master fund Ltd and Acorn Bioventures 2, L.P (the “Transaction”). Acorn Bioventures 2, L.P is a fund where our Board Member Isaac Manke is a General Partner. As part of the Transaction, Addex received CHF 5.0 million in cash and shares representing 20% indirect equity interest in Neurosterix.

April 3, 2023 offering

On April 3, 2023, we sold to Armistice Capital Master Fund Ltd 7,999,998 treasury shares in the form of 66,666 ADSs at a price of USD 19.00 per ADS and 23,578,950 pre-funded warrants, in the form of 196,491 ADSs at a price of USD 18.80 per ADS with a remaining strike price of USD 0.20 per ADS. In addition, we granted Armistice Capital Master Fund Ltd, 31,578,948 warrants, in the form of 263,157 ADSs, with a strike price of USD 20.00 per ADS and an exercise period expiring on April 5, 2028. We also reduced the strike price to USD 20.00 per ADS and extended the exercise period to April 5, 2028 of 9,230,772 warrants in the form of 76,923 ADSs issued on December 21, 2021 and 15,000,000 warrants in the form of 125,000 ADSs issued on July 26, 2022. The pre-funded warrants are exercisable only if Armistice Capital Master Fund possesses less than 9.99% of the outstanding shares whilst warrants are exercisable only if Armistice Capital Master Fund possesses less than 4.99% of the outstanding shares. All the pre-funded warrants have been exercised in 2023.

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ADSs |  | ADS Pre-funded |  | ADS Warrants |  | ADS Warrants
​ | ​ | purchased | ​ | warrants purchased | ​ | granted | ​ | repriced
​ | ​ | (1) | ​ | (1) (2) | ​ | (1) (3) | ​ | (1)(3)
Major Shareholder at the time of the transaction |  | 66,666 |  | 196,491 |  | 263,157 |  | 201,923
Armistice Capital Master Fund Ltd (4) |  | ​ | ​ | ​ | ​ | ​ | ​ | ​

(1) | Each ADS represents one hundred and twenty shares.

(2) | Pre-funded warrant ADSs are exercisable only if Armistice Capital Master Fund possesses less than 9.99% of the outstanding shares.

(3) | Warrant ADSs are exercisable only if Armistice Capital Master Fund possesses less than 4.99% of the outstanding shares. Warrant ADSs respectively granted and repriced on April 3, 2023, have both an exercise price of USD 20.00 per ADS and will expire on April 5, 2028.

(4) | Armistice Capital Master Fund Ltd that is wholly owned by Armistice Capital LLC is the holder of more than 5% of our outstanding shares on April 3, 2023.

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July 22, 2022 offering

On July 22, 2022, we sold to Armistice Capital Master Fund Ltd, fully owned by Armistice Capital LLC, 4,500,000 treasury shares in the form of 37,500 ADSs at a price of USD 34.00 per ADS and 10,500,000 pre-funded warrants, in the form of 87,500 ADSs at a price of USD 33.80 per ADS with a remaining strike price of USD 0.20. Additionally, 15,000,000 warrants in the form of 125,000 ADSs were granted with a strike price of USD 38.00 per ADS and will expire on July 26, 2027. The pre-funded warrants are exercisable only if Armistice Capital Master Fund possesses less than 9.99% of the outstanding shares whilst warrants are exercisable only if Armistice Capital Master Fund possesses less than 4.99% of the outstanding shares. All the pre-funded warrants have been exercised in 2022.

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ADSs |  | ADS Pre-funded |  | ADS Warrants
​ | ​ | purchased | ​ | warrants purchased | ​ | granted
​ |  | (1) | ​ | (1) (2) | ​ | (1)(3)
Major Shareholder at the time of the transaction |  |  |  |  |  |
Armistice Capital Master Fund Ltd (4) |  | 37,500 |  | 87,500 |  | 125,000

(1) | Each ADS represents one hundred and twenty shares

(2) | Pre-funded warrant ADSs are exercisable only if Armistice Capital Master Fund possesses less than 9.99% of the outstanding shares. Pre-funded warrant ADSs have an exercise price of USD 0.20 per ADS and will expire when exercised in full.

(3) | Warrant ADSs are exercisable only if Armistice Capital Master Fund possesses less than 4.99% of the outstanding shares. Warrant ADSs have an exercise price of USD 38.00 per ADS and will expire on July 26, 2027.

(4) | Armistice Capital Master Fund Ltd that is wholly owned by Armistice Capital LLC, is a holder of more than 5% of our outstanding shares on July 22, 2022.

Director and Executive Officer Compensation

See “Item 6.B—Compensation of Directors and Executive Officers” for information regarding compensation of directors and executive officers.

We have entered into indemnification agreements with each of our directors and executive officers. These agreements require us to indemnify our directors and executive officers to the fullest extent permitted by law.

Related-Party Transactions Policy

We have adopted a related-party transaction policy that sets forth our procedures for the identification, review, consideration and approval or ratification of related-party transactions. For purposes of our policy only, a related-party transaction is a transaction, arrangement or relationship, or any series of similar transactions, arrangements or relationships, in which we and any related parties are, were or will be participants, which are not in the ordinary course of business, (2) at arms’ length and (3) in which the amount involved exceeds CHF 120,000. Transactions involving compensation for services provided to us as an employee or director are not covered by this policy. For purposes of this policy, a related party is any executive officer, director (or nominee for director) or beneficial owner of more than 5% of any class of our voting securities, including any of their immediate family members and any entity owned or controlled by such persons.

Under the policy, if a transaction has been identified as a related-party transaction, including any transaction that was not a related-party transaction when originally consummated or any transaction that was not initially identified as a related-party transaction prior to consummation, our management must present information regarding the related-party transaction to our board of directors for review, consideration and approval. The presentation must include a description of, among other things, the material facts, the interests, direct and indirect, of the related parties, the benefits to us of the transaction and whether the transaction is on terms that are comparable to the terms available to or from, as the case may be, an unrelated third party or to or from employees generally. Under the policy, we will collect information that we deem reasonably necessary from each director, executive officer and, to the extent feasible, significant shareholder to enable us to identify any existing or potential related-party transactions and to effectuate the terms of the policy. In addition, our board of directors has adopted a Code of Business Conduct and Ethics, under which our employees and directors will have an affirmative responsibility to disclose any transaction or relationship that reasonably could be expected to give rise to a conflict of interest. In considering related-party transactions, our audit committee, or other independent body of our board of directors, will take into account the relevant available facts and circumstances including:

| ● | the risks, costs and benefits to us;

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| ● | the impact on a director’s independence in the event that the related party is a director, immediate family member of a director or an entity with which a director is affiliated;

| ● | the availability of other sources for comparable services or products; and

| ● | the terms available to or from, as the case may be, unrelated third parties or to or from employees generally.

The policy requires that, in determining whether to approve, ratify or reject a related-party transaction, our audit committee, or other independent body of our board of directors, must consider, in light of known circumstances, whether the transaction is in, or is not inconsistent with, our best interests and those of our shareholders, as our audit committee, or other independent body of our board of directors, determines in the good faith exercise of its discretion.

C. | Interests of Experts and Counsel.

Not applicable.

Item 8. Financial Information

A. | Consolidated Statements and Other Financial Information.

Our consolidated financial statements are appended at the end of this Annual Report on Form 20-F, starting at page F-1, and are incorporated herein by reference.

Dividend Distribution Policy

We have never paid a dividend, and we do not anticipate paying dividends in the foreseeable future. We intend to retain all available funds and any future earnings to fund the development and expansion of our business.

Under Swiss law, any dividend must be proposed by our board of directors and approved by a shareholders’ meeting. In addition, our auditors must confirm that the dividend proposal of our board of directors conforms to Swiss statutory law and our articles of association. A Swiss corporation may pay dividends only if it has sufficient distributable profits brought forward from the previous business years (“Gewinnvortrag”) or if it has distributable reserves (“frei verfügbare Reserven”), each as evidenced by its audited standalone statutory balance sheet prepared pursuant to Swiss law and after allocations to reserves required by Swiss law and its articles of association have been deducted. Distributable reserves are generally booked either as “free reserves” (“freie Reserven”) or as “reserve from capital contributions” (“Reserven aus Kapitaleinlagen”). Distributions out of issued share capital, which is the aggregate nominal value of a corporation’s issued shares, may be made only by way of a share capital reduction. See Exhibit 2.4 “Description of Shares”.

B. | Significant Changes.

On April 2, 2024, we divested our allosteric modulator discovery platform and a portfolio of pre-clinical programs to a new Swiss company, Neurosterix Pharma Sàrl (equivalent to an LLC). Neurosterix is focused on the discovery and development of novel orally available allosteric modulator drug candidates, including M4 PAM for schizophrenia, mGlu7NAM for stress related disorders and mGlu2NAM for mild neurocognitive disorders. In connection with the transaction, we received CHF 5.0 million and a 20% equity interest in Neurosterix US Holdings LLC, the sole shareholder of Neurosterix. Neurosterix received USD 63 million in initial funding from a syndicate of investors led by Perceptive Advisors.

The divestment of our discovery platform and early-stage programs includes the transfer of the associated research and development staff, with the provision of a service agreement to allow key members of staff to support us in achieving our business strategy. As of the date of the Transaction, all employees of Addex, other than our Head of Finance, became employees of Neurosterix. Pursuant to the service agreement, certain former Addex employees, including our Chief Executive Officer, will dedicate a portion of their time to Addex in 2024. Neurosterix services are provided at no charge, other than documented out-of pocket costs. Unless the service agreement is extended, we will need to significantly expand our operations in order to continue to develop our programs.

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Item 9. The Offer and Listing.

A. | Offer and Listing Details.

Our shares have been listed on Nasdaq Capital Market, or Nasdaq, under the symbol “ADXN” since January 29, 2020 and on the SIX Swiss Exchange, or SIX, under the symbol “ADXN” since May 22, 2007.

B. | Plan of Distribution.

Not applicable.

C. | Markets.

Our shares have been listed on Nasdaq Capital Market, or Nasdaq, under the symbol “ADXN” since January 29, 2020 and on the SIX Swiss Exchange, or SIX, under the symbol “ADXN” since May 22, 2007.

D. | Selling Shareholders.

Not applicable.

E. | Dilution.

Not applicable.

F. | Expenses of the Issue.

Not applicable.

​

Item 10. Additional Information.

A. | Share Capital.

Not applicable.

B. | Memorandum and Articles of Association.

See the information set forth in Exhibit 2.4 “Description of Shares,” which is incorporated herein by reference.

C. | Material Contracts.

Service Agreement

Pursuant to a service agreement dated April 2, 2024, Neurosterix agreed to provide us certain services as well as the provision of office space.

At the Market Offering (ATM) Programs

On June 29, 2021, we entered into a Controlled Equity OfferingSM Sales Agreement with Cantor Fitzgerald & Co. to sell treasury shares from time to time at our discretion under an “at the market offering” (ATM) program, or the Cantor Sales Agreement. The prospectus supplement for the Cantor Sales Agreement was terminated on October 15, 2021 and the Cantor Sales Agreement was terminated on January 29, 2024. From June 29, 2021 through December 13, 2021, the Company issued an aggregate of 1,200 ADSs representing 7,200 ordinary shares at an average price of USD 10.12 per ADS through the Sales Agreement Prospectus, resulting in gross proceeds to the Company for approximately USD 12 thousand. No ADSs were issued under the Cantor Sales Agreement from December 13, 2021 through the termination of the Cantor Sales Agreement on January 29, 2024.

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On January 30, 2024, we entered into an At the Market Offering Agreement with H.C. Wainwright & Co., LLC to sell treasury shares from time to time at our discretion under an ATM program, or the Wainwright Sales Agreement. From January 30, 2024 to the date hereof, we have not sold any ADSs under the Wainwright Sales Agreement.

Sale Agency Agreement

On August 24, 2020, we entered into a sale agency agreement with Kepler Cheuvreux to sell treasury shares on Six Swiss Exchange from time to time. The initial termination date of March 31, 2021 has been extended to December 31, 2021. On June 21, 2022, we entered into a new sale agency agreement with Kepler Cheuvreux expiring on June 21, 2023 whose substantive terms are aligned with the agreement entered into on August 24, 2020. On July 25, 2023, we entered into a new sale agency agreement with Kepler Cheuvreux expiring on June 26, 2024 whose substantive terms are aligned with the agreements entered into on August 24, 2020 and June 21, 2022. From inception of the sale agency agreement with Kepler Cheuvreux to the publication of our Annual Report on Form 20-F, we generated gross proceeds of CHF 2.7 million.

Exclusive Placement Agent Agreement

On September 27, 2021, we signed with H.C Wainwright an exclusive placement agent agreement expiring on December 27, 2021, but remaining in force until September 26, 2022 for offerings executed with investors contacted by H.C Wainwright during the validity period of the contract. Total gross proceeds raised within this Exclusive Placement Agent agreement amounted to USD 14.2 million in two offerings with Armistice Capital Master Fund Ltd, fully owned by Armistice Capital LLC. On December 16, 2021, we sold 3,752,202 shares in the form of 31,268 ADSs at a sale price of USD 130.00 per ADS and 5,478,570 pre-funded warrants in the form of 45,654 ADSs at a sale price of USD 129.80 per ADS with a remaining strike price of USD 0.20 per ADS. All pre-funded warrants have been exercised in 2022 and the total gross proceed of this offering amounted to USD 10 million. Additionally, 9,230,772 warrants to purchase 76,923 ADSs, expiring on December 21, 2027, were granted with a strike price of USD 130.00 per ADS. On July 22, 2022, we sold 4,500,000 treasury shares in the form of 37,500 ADSs at a price of USD 34.00 per ADS and 10,500,000 pre-funded warrants, in the form of 87,500 ADSs at a price of USD 33.80 per ADS with a remaining strike price of USD 0.20. Additionally, 15,000,000 warrants in the form of 125,000 ADSs, expiring on July 26, 2027, were granted with a strike price of USD 38.00 per ADS. All pre-funded warrants have been exercised in 2022 and the total gross proceed of this offering a,mounted to USD 4.2 million. On April 3, 2024, the 9,230,772 warrants in a form of 76,923 ADSs issued on December 21, 2021 and the 15,000,000 warrants in a form of 125,000 ADSs issued on July 26, 2022 were amended. Their exercise price has been reduced to USD 20.00 per ADS and their exercise period has been extended to April 5, 2028.

Collaboration Agreement with Indivior for Development of novel GABAB PAM Compounds, including for the Treatment of Addiction and Other CNS Diseases

In January 2018, we entered into an agreement with Indivior for the discovery, development and commercialization of novel GABAB PAM compounds for the treatment of addiction and other CNS diseases. This agreement included the selected clinical candidate, ADX71441. In addition, Indivior agreed to fund a research program at Addex to discover novel GABAB PAM compounds.

Indivior has sole responsibility, including funding liability, for development of selected compounds under the agreement through preclinical and clinical trials, as well as registration procedures and commercialization, if any, worldwide. Indivior has the right to design development programs for selected compounds under the agreement. Through our participation in a joint development committee, we review, in an advisory capacity, any development programs designed by Indivior. However, Indivior has authority over all aspects of the development of such selected compounds.

Under terms of the agreement, we have granted Indivior an exclusive license to use relevant patents and know-how in relation to the development and commercialization of drug candidates selected by Indivior. Subject to agreed conditions, Addex and Indivior jointly own all intellectual property rights that are jointly developed, and Addex or Indivior individually own all intellectual property rights that Addex or Indivior develop individually. Addex has retained the right to select compounds from the research program for further development in areas outside the interest of Indivior including Charcot-Marie-Tooth type 1A neuropathy, or CMT1A. Under certain conditions, but subject to certain consequences, Indivior may terminate the agreement.

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Under terms of the agreement, we received a non-refundable upfront fee of USD 5.0 million for the right to use the clinical candidate, ADX71441, including all materials and know-how related to this clinical candidate. In addition, we are eligible for payments on successful achievement of pre-specified clinical, regulatory and commercial milestones totaling USD 330 million. In addition, we are eligible for a royalty in the low double digits on net sales of applicable products on a country-by country-basis. The term of the royalty for each licensed product in any particular country commences on such product’s launch and ends on the latest of ten-year anniversary of launch, expiration of certain applicable patent rights, and expiration of certain applicable marketing or data exclusivity periods. On February 14, 2019, Indivior terminated the development of their selected compound, ADX71441.

Separately, Indivior funds research at Addex, based on a research plan to be mutually agreed between the parties, to discover novel GABAB PAM compounds. These future novel GABAB PAM compounds, if selected by Indivior, become licensed compounds. We agreed with Indivior to an initial research term and duration and duration of two years, with a funding of USD4 million over the period for our R&D costs incurred, that can be extended by twelve-month increments. Following Indivior’s selection of one newly identified compound, Addex has the right to also select one additional newly identified compound. Addex is responsible for the funding of all development and commercialization costs of its selected compounds and Indivior has no rights to the Addex selected compounds. The initial two-year research term was expected to run from May 2018 to April 2020. In 2019, Indivior agreed an additional research funding of USD1.6 million, for the research period. On October 30, 2020, the research term was extended until June 30, 2021 and Indivior agreed additional research funding of USD2.8 million. Effective May 1, 2021, the research term was extended until July 31, 2022 and Indivior agreed additional research funding of CHF 3.7 million, of which CHF 2.7 million has been paid to the Group and CHF 1.0 million paid directly by Indivior to third party suppliers that are supporting the funded research program. In August 2022, the research agreement was extended until March 31, 2023 and Indivior agreed additional research funding of CHF 0.85 million. Effective November 1, 2022 the research term was extended until June 30, 2023 and Indivior agreed additional research funding of CHF 0.95 million. Effective July 1, 2023, the research term was extended until June 30, 2024 and Indivior agreed to additional research funding of CHF 2.7 million including CHF 1.1 million expected to be received directly by the Group and CHF 1.6 million paid directly by Indivior to third party suppliers that are supporting the funded research program.

Indivior may terminate the Agreement in its entirety or with respect to one or more countries or products upon 90 days’ prior written notice prior to receipt of marketing approval for drug candidates or twelve months’ prior written notice after the receipt of marketing approval.

Addex may terminate the agreement if Indivior commits a material breach of the agreement and fails to cure such breach within 90 days of Addex’s written notification to Indivior or fails to cure breaches to any payment obligations breach within 30 days.

​

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Collaboration Agreement with Janssen for Development of Novel mGlu2 PAM Compounds, including ADX71149, for the Treatment of CNS and Related Diseases

On December 31, 2004, we entered into a collaboration and license agreement with Janssen Pharmaceuticals Inc., or Janssen, for the discovery, development and commercialization of novel mGlu2 PAM compounds for the treatment of CNS and related diseases. We agreed with Janssen to an initial research term and duration of two years that can be extended if parties mutually agree thereto in writing. The agreement was not extended. ADX71149 is one of the drug candidates discovered and selected for development by Janssen under the agreement. In 2012, Janssen announced completion of a Phase 2a clinical trial in Europe with ADX71149 for the treatment of schizophrenia demonstrating proof of principal in patients with negative symptoms of schizophrenia, such as apathy, social withdrawal, loss of emotional expression or sleep disorders. Janssen also conducted a Phase 2a clinical trial with ADX71149 for the treatment of patients with anxious depression, which failed to show statistically significant effects. In addition, Janssen announced in 2015 that ADX71149 demonstrated synergies with levetiracetam (a globally commercialized antiepileptic drug) in preclinical models of epilepsy.

Under our agreement with Janssen, we have granted Janssen an exclusive license to use relevant patents and know-how in relation to the development and commercialization of drug candidates selected by Janssen under the agreement and a non-exclusive worldwide license to conduct research on the collaboration compounds using relevant patents and know-how. Subject to certain conditions, we and Janssen own, jointly, all intellectual property rights that we and Janssen develop jointly, and we or Janssen own all intellectual property rights that we or Janssen develop individually. Under certain conditions, but subject to certain consequences, Janssen may terminate the agreement for any reason, subject to a 90-day notice period.

Janssen has sole responsibility, including funding liability, for development of selected compounds under the agreement through preclinical and clinical trials, as well as registration procedures and commercialization, if any, in the United States, Japan, the United Kingdom, Germany, France, Spain and Italy. Janssen has the right to design development programs for selected compounds under the agreement. Through our participation in a joint development committee, we review, in an advisory capacity, any development programs designed by Janssen. However, Janssen has authority over all aspects of the development of selected compounds and may develop or commercialize third-party compounds with a different mechanism of action for identical use.

Under the terms of the Janssen agreement, we received an upfront fee of € 4.6 million and research funding of € 6.4 million during the research period, which ran from 2005 to 2007. In addition, we are eligible for payments on successful achievement of pre-specified clinical and regulatory milestones. We are also eligible for a royalty in the low double-digits on net sales of applicable products on a country-by country-basis and on a product by product basis, for a period commencing on the date of first sale and ending upon the latest of the expiration of twelve years from the date of first sale of a product in a given country or the last to expire of our patents containing a claim covering composition of compound comprised in a product sold by Janssen, its affiliates or sublicensees in such country. We received a € 1.5 million milestone payment in relation to the entry of ADX71149 into Phase 1 in July 2009 and a € 2.6 million milestone payment in relation to the entry of ADX71149 into Phase 2 in June 2011. We are eligible for a further €109 million in success-based development and regulatory milestones and low double-digit royalties on net sales.

In the event that no compounds are discovered or identified during the research period, the agreement shall terminate.

In the event that there are compounds but no mGlu2 PAM are discovered during the research period or 6 months thereafter, our and Janssen’s rights and obligations to develop commercialize, pay royalties and milestones on mGlu2 PAM compounds will terminate. The contract also contains termination rights for non-defaulting parties upon breach.

For additional information on our material contracts, please see “Item 4. Information on the Company,” “Item 6. Directors, Senior Management and Employees,” and “Item 7.B. Related Party Transactions” of this Annual Report on 20-F.

D. | Exchange Controls.

There are no Swiss governmental laws, decrees, regulations or other legislation that restrict, in a manner material to us, the export or import of capital, including any foreign exchange controls, or that generally affect the remittance of dividends or other payments to non-residents or non-citizens of Switzerland who hold our shares.

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E. | Taxation.

Material U.S. Federal Income Tax Considerations for U.S. Holders

The following is a description of the material U.S. federal income tax consequences to the U.S. Holders (as defined below) of acquiring, owning and disposing of our shares or ADSs representing our shares. It is not a comprehensive description of all tax considerations that may be relevant to a particular person’s decision to acquire securities. This discussion applies only to U.S. Holders that are initial purchasers of our ADSs representing our shares and that will hold such ADSs as a capital asset for tax purposes (generally, property held for investment). In addition, it does not describe all of the tax consequences that may be relevant in light of a U.S. Holder’s particular circumstances, including state and local tax consequences, estate tax consequences, alternative minimum tax consequences, the potential application of the Medicare contribution tax, and tax consequences applicable to U.S. Holders subject to special rules, such as:

| ● | banks, insurance companies, and certain other financial institutions;

| ● | U.S. expatriates and certain former citizens or long-term residents of the United States;

| ● | dealers or traders in securities who use a mark-to-market method of tax accounting;

| ● | persons holding our shares or ADSs representing our shares as part of a hedging transaction, “straddle,” wash sale, conversion transaction or integrated transaction or persons entering into a constructive sale with respect to our shares or ADSs representing our shares;

| ● | persons whose “functional currency” for U.S. federal income tax purposes is not the U.S. dollar;

| ● | brokers, dealers or traders in securities, commodities or currencies;

| ● | tax-exempt entities or government organizations;

| ● | S corporations, partnerships, or other entities or arrangements classified as partnerships for U.S. federal income tax purposes;

| ● | regulated investment companies or real estate investment trusts;

| ● | persons who acquired our shares or ADSs representing our shares pursuant to the exercise of any employee stock option or otherwise as compensation;

| ● | persons required under Section 451(b) of the Code to conform to the timing of income accruals with respect to our ADSs representing our shares or the shares represented by such ADSs;

| ● | persons that own or are deemed to own (including by attribution) ten percent or more of our shares by voting power or value; and

| ● | persons holding our shares or ADSs representing our shares in connection with a trade or business, permanent establishment, or fixed base outside the United States.

Holders of our shares or ADSs representing our shares who fall within one of the categories above are advised to consult their tax advisor regarding the specific tax consequences which may apply to their particular situation.

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If an entity that is classified as a partnership for U.S. federal income tax purposes holds our shares or ADSs representing our shares, the U.S. federal income tax treatment of a partner will generally depend on the status of the partner and the activities of the partnership. Partnerships holding our shares or ADSs representing our shares and partners in such partnerships are encouraged to consult their tax advisers as to the particular U.S. federal income tax consequences of holding and disposing of such shares or ADSs representing our shares.

The discussion is based on the Internal Revenue Code of 1986, as amended, or the Code, administrative pronouncements, judicial decisions, final, temporary and proposed Treasury Regulations, and the Convention between the United States of America and the Swiss Confederation for the Avoidance of Double Taxation with Respect to Taxes on Income, signed on October 2, 1996, as amended and currently in force, or the U.S.-Swiss Tax Treaty, in each case, as in effect and available on the date hereof. All of the foregoing are subject to change, which change could apply retroactively, and to differing interpretations, all of which could affect the tax considerations described below. There can be no assurances that the U.S. Internal Revenue Service, or the IRS, will not take a different position concerning the tax consequences of the acquisition, ownership and disposition of our shares or ADSs representing our shares or that such a position would not be sustained by a court. We have not obtained, nor do we intend to obtain, a ruling with respect to the U.S. federal income tax considerations in the purchase, ownership or disposition of our shares or ADSs representing our shares. Accordingly, holders should consult their own tax advisors concerning the U.S. federal, state, local and non-U.S. tax consequences of acquiring, owning and disposing of our shares or ADSs representing our shares in their particular circumstances.

A “U.S. Holder” is a holder who, for U.S. federal income tax purposes, is a beneficial owner of our shares or ADSs representing our shares who is eligible for the benefits of the U.S.-Swiss Tax Treaty and is:

| ● | a citizen or individual resident of the United States;

| ● | a corporation, or other entity taxable as a corporation, created or organized in or under the laws of the United States, any state therein or the District of Columbia;

| ● | an estate the income of which is subject to U.S. federal income taxation regardless of its source; or

| ● | a trust if (1) a U.S. court is able to exercise primary supervision over the administration of the trust and one or more U.S. persons have authority to control all substantial decisions of the trust or (2) the trust has a valid election to be treated as a U.S. person under applicable U.S. Treasury Regulations.

U.S. Holders are encouraged to consult their tax advisers concerning the U.S. federal, state, local and foreign tax consequences of owning and disposing of our shares or ADSs representing our shares in their particular circumstances.

The discussion below assumes that the representations contained in the deposit agreement are true and that the obligations in the deposit agreement and any related agreement will be complied with in accordance with their terms. Generally, a holder of ADSs should be treated for U.S. federal income tax purposes as the beneficial owner of the underlying ordinary shares represented by the ADS. Accordingly, no gain or loss will be recognized if a U.S. Holder exchanges ADSs for the underlying shares representing those ADSs. The U.S. Treasury has expressed concern that parties to whom ADSs are released before shares are delivered to the Depositary or intermediaries in the chain of ownership between holders and the issuer of the security underlying the ADSs, may be taking actions that are inconsistent with the claiming of foreign tax credits by U.S. Holders of ADSs. These actions would also be inconsistent with the claiming of the reduced rate of tax, described below, applicable to dividends received by certain non-corporate U.S. Holders. Accordingly, the creditability of non-U.S. withholding taxes (if any), and the availability of the reduced tax rate for dividends received by certain non-corporate U.S. Holders, each described below, could be affected by actions taken by such parties or intermediaries.

Passive Foreign Investment Company Rules

Based on the nature and composition of our income, assets and activities for our taxable year ended December 31, 2023, and certain assumptions with respect to the characterization of our income and assets as active or passive, we believe that we were classified as a PFIC for our taxable year ended December 31, 2023 and may be a PFIC in future years. The application of the PFIC rules is subject to uncertainty in several respects, and therefore, no assurances can be provided with respect to our PFIC status for our taxable year ended December 31, 2023 or with regard to our PFIC status in any other past, the current or any future taxable year.

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If we are classified as a PFIC in any taxable year, a U.S. Holder will be subject to special rules generally intended to reduce or eliminate any benefits from the deferral of U.S. federal income tax that a U.S. Holder could derive from investing in a non-U.S. company that does not distribute all of its earnings on a current basis.

A non-U.S. corporation will be classified as a PFIC for any taxable year in which, after applying certain look-through rules with respect to the income and assets of its subsidiaries, either:

| ● | at least 75% of its gross income is “passive income”; or

| ● | at least 50% of its gross assets (determined on the basis of a quarterly weighted average) is attributable to assets that produce “passive income” or are held for the production of “passive income.”

For this purpose, cash generally is a passive asset and passive income generally includes dividends, interest, royalties and rents (other than royalties and rents derived in the active conduct of a trade or business and not derived from a related person). We will be treated as owning our proportionate share of the assets and earning our proportionate share of the income of any other corporation or partnership, the equity of which we own, directly or indirectly, 25% or more (by value).

The determination of whether we are a PFIC is a fact-intensive determination made on an annual basis and the applicable law is subject to varying interpretation. In particular, the characterization of our assets as active or passive may depend in part on our current and intended future business plans, which are subject to change. In addition, for our current and future taxable years, the total value of our assets for PFIC testing may be determined in part by reference to the market price of our ordinary shares or ADSs from time to time, which may fluctuate considerably. If we are a PFIC for any taxable year during which a U.S. Holder holds our shares or ADSs representing our shares, such U.S. Holder will be subject to special tax rules discussed below and could suffer adverse tax consequences.

Under the income test, our status as a PFIC depends on the composition of our income which will depend on the transactions we enter into in the future and our corporate structure. The composition of our income and assets is also affected by how, and how quickly, we spend the cash we raise in any offering. Our U.S. counsel expresses no opinion with respect to our PFIC status for our taxable year ended December 31, 2023 or any future taxable year.

A separate determination must be made after the close of each taxable year as to whether we are a PFIC for that year. As a result, our PFIC status may change from year to year and we have not yet made any determination as to our expected PFIC status for the current year. The total value of our assets for purposes of the asset test generally will be calculated using the market price of our shares or ADSs representing our shares, which may fluctuate considerably. Fluctuations in the market price of the shares or ADSs representing our shares may result in our being a PFIC for any taxable year. Because of the uncertainties involved in establishing our PFIC status, our United States tax counsel expresses no opinion regarding our PFIC status for our taxable year ended December 31, 2023 or our current, or any other past or future taxable year.

If we are classified as a PFIC in any year with respect to which a U.S. Holder owns our shares or ADSs representing our shares, we will continue to be treated as a PFIC with respect to such U.S. Holder in all succeeding years during which the U.S. Holder owns the shares or ADSs representing our shares, regardless of whether we continue to meet the tests described above unless (i) we cease to be a PFIC and the U.S. Holder has made a “deemed sale” election under the PFIC rules, or (ii) the U.S. Holder makes a “QEF Election” (defined below) or is eligible to make and makes a mark-to-market election (as described below), with respect to all taxable years during such U.S. Holder’s holding period in which we are a PFIC. If the “deemed sale” election is made, a U.S. Holder will be deemed to have sold the shares or ADSs representing our shares the U.S. Holder holds at their fair market value as of the date of such deemed sale and any gain from such deemed sale would be subject to the rules described below. After the deemed sale election, so long as we do not become a PFIC in a subsequent taxable year, the U.S. Holder’s shares or ADSs representing our shares with respect to which such election was made will not be treated as shares in a PFIC and the U.S. Holder will not be subject to the rules described below with respect to any “excess distribution” the U.S. Holder receives from us or any gain from an actual sale or other disposition of the shares or ADSs representing our shares. U.S. Holders should consult their tax advisors as to the possibility and consequences of making a deemed sale election if such election becomes available.

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For each taxable year we are treated as a PFIC with respect to U.S. Holders, U.S. Holders will be subject to special tax rules with respect to any “excess distribution” such U.S. Holder receives and any gain such U.S. Holder recognizes from a sale or other disposition (including a pledge) of our shares or ADSs representing our shares, unless (i) such U.S. Holder makes a QEF Election or (ii) our shares or ADSs representing our shares constitute “marketable” securities, and such U.S. Holder makes a mark-to-market election as discussed below. Distributions a U.S. Holder receives in a taxable year that are greater than 125% of the average annual distributions a U.S. Holder received during the shorter of the three preceding taxable years or the U.S. Holder’s holding period for the shares or ADSs representing our shares will be treated as an excess distribution. Under these special tax rules:

| ● | the excess distribution or gain will be allocated ratably over a U.S. Holder’s holding period for the shares or ADSs representing our shares;

| ● | the amount allocated to the current taxable year, and any taxable year prior to the first taxable year in which we became a PFIC, will be treated as ordinary income; and

| ● | the amount allocated to each other year will be subject to the highest tax rate in effect for that year and the interest charge generally applicable to underpayments of tax will be imposed on the resulting tax attributable to each such year.

The tax liability for amounts allocated to years prior to the year of disposition or “excess distribution” cannot be offset by any net operating losses for such years, and gains (but not losses) realized on the sale of the shares or ADSs representing our shares cannot be treated as capital gains, even if a U.S. Holder holds the shares or ADSs representing our shares as capital assets. In addition, dividend distributions made to you will not qualify for the lower rates of taxation applicable to qualified dividends discussed below under “Taxation of Distributions.”

If we are a PFIC, a U.S. Holder will generally be subject to similar rules with respect to distributions we receive from, and our dispositions of the stock of, any of our direct or indirect subsidiaries that also are PFICs, as if such distributions were indirectly received by, and / or dispositions were indirectly carried out by, such U.S. Holder. U.S. Holders should consult their tax advisors regarding the application of the PFIC rules to our subsidiaries.

U.S. Holders can avoid the interest charge on excess distributions or gain relating to our shares or ADSs representing our shares by making a mark-to-market election with respect to the shares or ADSs representing our shares, provided that the shares or ADSs representing our shares are “marketable.” Shares or ADSs representing our shares will be marketable if they are “regularly traded” on certain U.S. stock exchanges or on a foreign stock exchange that meets certain conditions. For these purposes, the shares or ADSs representing our shares will be considered regularly traded during any calendar year during which they are traded on, other than in de minimis quantities, at least 15 days during each calendar quarter. Any trades that have as their principal purpose meeting this requirement will be disregarded. Our ADSs representing our shares are listed on Nasdaq, which is a qualified exchange for these purposes. Consequently, if our ADSs representing our shares remain listed on Nasdaq and are regularly traded, and you are a U.S. Holder of ADSs representing our shares, we expect the mark-to-market election would be available to you if we are a PFIC. Each U.S. Holder should consult its tax advisor as to the whether a mark-to-market election is available or advisable with respect to the shares or ADSs representing our shares. It should be noted that only our ADSs representing our shares and not our shares are listed on Nasdaq. Consequently, our shares may not be marketable if SIX Swiss Exchange (where our shares are listed) does not meet the applicable requirements. U.S. Holders should consult their tax advisors regarding the availability of the mark-to-market election for shares that are not represented by ADSs.

A U.S. Holder that makes a mark-to-market election must include in ordinary income for each year an amount equal to the excess, if any, of the fair market value of our shares or ADSs representing our shares at the close of the taxable year over the U.S. Holder’s adjusted tax basis in the shares or ADSs representing our shares. An electing holder may also claim an ordinary loss deduction for the excess, if any, of the U.S. Holder’s adjusted basis in the shares or ADSs representing our shares over the fair market value of the shares or ADSs representing our shares at the close of the taxable year, but this deduction is allowable only to the extent of any net mark-to-market gains for prior years. Gains from an actual sale or other disposition of the shares or ADSs representing our shares will be treated as ordinary income, and any losses incurred on a sale or other disposition of the shares will be treated as an ordinary loss to the extent of any net mark-to-market gains for prior years. Once made, the election cannot be revoked without the consent of the IRS unless the shares or ADSs representing our shares cease to be marketable.

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However, a mark-to-market election generally cannot be made for equity interests in any lower-tier PFICs that we own, unless shares of such lower-tier PFIC are themselves “marketable.” As a result, even if a U.S. Holder validly makes a mark-to-market election with respect to our shares or ADSs representing our shares, the U.S. Holder may continue to be subject to the PFIC rules (described above) with respect to its indirect interest in any of our investments that are treated as an equity interest in a PFIC for U.S. federal income tax purposes. U.S. Holders should consult their tax advisors as to the availability and desirability of a mark-to-market election, as well as the impact of such election on interests in any lower-tier PFICs.

Alternatively, a U.S. Holder can make an election, if we provide the necessary information, to treat us and each lower-tier PFIC as a qualified electing fund, or a QEF Election, in the first taxable year we (and our relevant subsidiaries) are treated as a PFIC with respect to the U.S. Holder. If such election remains in place while we and any lower-tier PFIC subsidiaries are PFICs, we and our subsidiaries will not be treated as PFICs with respect to such U.S. Holder. A U.S. Holder must make the QEF Election for us and for each of our subsidiaries that is a PFIC by attaching a separate properly completed IRS Form 8621 for each such PFIC to the U.S. Holder’s timely filed U.S. federal income tax return. For each year in which we are a PFIC, we expect to provide U.S. Holders, upon request, a “PFIC Annual Information Statement”, with the information required to allow U.S. Holders to make a QEF Election for United States federal income tax purposes.

If a U.S. Holder makes a QEF Election with respect to a PFIC, then in lieu of the tax consequences described above, the U.S. Holder will be currently taxable on its pro rata share of the PFIC’s ordinary earnings and net capital gain (at ordinary income and capital gain rates, respectively) for each taxable year that the entity is classified as a PFIC. If a U.S. Holder makes a QEF Election with respect to us, any distributions paid by us out of our earnings and profits that were previously included in the U.S. Holder’s income under the QEF Election would not be taxable to the holder. However, a U.S. Holder can only make a QEF election with respect to ADSs in a PFIC if such company agrees to furnish such U.S. Holder with certain tax information annually. For our taxable year ended December 31, 2023, we intend to provide U.S. Holders, upon request, such information as the IRS may require, including a PFIC annual information statement, in order to enable U.S. Holders to make a QEF Election. However, there is no assurance that we will have timely knowledge of our status as a PFIC in the future or that the required information will be provided at a time that will permit a U.S. Holder to make or maintain a QEF Election. We have not determined if we will provide U.S. Holders such information for any subsequent taxable year. A U.S. Holder will increase its tax basis in its shares or ADSs representing our shares by an amount equal to any income included under the QEF Election and will decrease its tax basis by any amount distributed on the shares or ADSs representing our shares that is not included in the holder’s income. However, we do not currently expect to pay distributions with respect to our ADSs. U.S. Holders should consult with their tax advisors regarding the implications of owning stock in a PFIC, including whether and how to make and maintain a QEF Election. In addition, a U.S. Holder will recognize capital gain or loss on the disposition of shares or ADSs representing our shares in an amount equal to the difference between the amount realized and the holder’s adjusted tax basis in the shares or ADSs representing our shares. U.S. Holders should note that if they make QEF Elections with respect to us and lower-tier PFICs, they may be required to pay U.S. federal income tax with respect to their shares or ADSs representing our shares for any taxable year significantly in excess of any cash distributions (which may be zero) received on the shares or ADSs representing our shares for such taxable year. U.S. Holders should consult their tax advisors regarding making QEF Elections in their particular circumstances. If a U.S. Holder does not make and maintain a QEF election for the U.S. Holder’s entire holding period for the shares or ADSs representing our shares by making the election for the first year in which the U.S. Holder owns the shares or ADSs representing our shares, the U.S. Holder will be subject to the adverse PFIC rules discussed above unless the U.S. Holder can properly make a ‘purging election’ with respect to the shares or ADS representing our shares in connection with the U.S. Holder’s QEF Election. A purging election may require the U.S. Holder to recognize taxable gain on the U.S. Holder’s shares or ADSs representing our shares. No purging election is necessary for a U.S. Holder that timely makes a QEF election for the first year in which the U.S. Holder acquired our shares or ADSs representing our shares.

The U.S. federal income tax rules relating to PFICs are complex. Prospective U.S. investors are urged to consult their own tax advisors with respect to the acquisition, ownership and disposition of our shares or ADSs representing our shares, the consequences to them of an investment in a PFIC, any elections available with respect to our shares or ADSs representing our shares and the IRS information reporting obligations with respect to the acquisition, ownership and disposition of our shares or ADSs representing our shares.

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Taxation of Distributions

Subject to the discussion above under “Passive Foreign Investment Company Rules,” distributions paid on our shares or ADSs representing our shares will generally be treated as dividends to the extent paid out of our current or accumulated earnings and profits (as determined under U.S. federal income tax principles). Because we may not calculate our earnings and profits under U.S. federal income tax principles, we expect that distributions generally will be reported to U.S. Holders as dividends. Subject to applicable limitations, dividends paid to certain non-corporate U.S. Holders may be taxable at preferential rates applicable to “qualified dividend income” if we are a “qualified foreign corporation” and certain other requirements (discussed below) are met. A non-U.S. corporation (other than a corporation that is classified as a PFIC for the taxable year in which the dividend is paid or the preceding taxable year) generally will be considered to be a qualified foreign corporation (a) if it is eligible for the benefits of a comprehensive tax treaty with the United States which the Secretary of Treasury of the United States determines is satisfactory for purposes of this provision and which includes an exchange of information provision, or (b) with respect to any dividend it pays on ADSs representing our shares which are readily tradable on an established securities market in the United States. ADSs representing our shares are listed on Nasdaq, which is an established securities market in the United States, and we expect the ADSs representing our shares to be readily tradable on Nasdaq. There can be no assurance that the ADSs representing our shares will be considered readily tradable on an established securities market in the United States in later years. The Company, which is incorporated under the laws of Switzerland, believes that it qualifies as a resident of Switzerland for purposes of, and is eligible for the benefits of, the U.S.-Swiss Tax Treaty, although there can be no assurance in this regard. Further, the IRS has determined that the U.S.-Swiss Tax Treaty is satisfactory for purposes of the qualified dividend rules and that it includes an exchange-of-information program. Therefore, subject to the discussion under “Passive Foreign Investment Company Rules,” above, such dividends will generally be “qualified dividend income” in the hands of individual U.S. Holders, provided that a holding period requirement (more than 60 days of ownership, without protection from the risk of loss, during the 121-day period beginning 60 days before the ex-dividend date) and certain other requirements are met. The dividends will not be eligible for the dividends-received deduction generally allowed to corporate U.S. holders.

However, the qualified dividend income treatment will not apply if we are treated as a PFIC. In addition, the amount of the dividend will be treated as foreign-source dividend income to U.S. Holders and will not be eligible for the dividends-received deduction generally available to U.S. corporations under the Code. Dividends will generally be included in a U.S. Holder’s income on the date of the U.S. Holder’s receipt of the dividend. The amount of any dividend income paid in foreign currency will be the U.S. dollar amount calculated by reference to the exchange rate in effect on the date of actual or constructive receipt, regardless of whether the payment is in fact converted into U.S. dollars. If the dividend is converted into U.S. dollars on the date of receipt, a U.S. Holder should not be required to recognize foreign currency gain or loss in respect of the dividend income. A U.S. Holder may have foreign currency gain or loss if the dividend is converted into U.S. dollars after the date of receipt. Such gain or loss would generally be treated as U.S.-source ordinary income or loss. The amount of any distribution of property other than cash generally will be the fair market value of such property on the date of distribution.

A U.S. Holder generally may claim the amount of any Swiss withholding tax as either a deduction from gross income or a credit against its U.S. federal income tax liability. The foreign tax credit is subject to numerous complex limitations that must be determined and applied on an individual basis. Generally, the credit cannot exceed the proportionate share of a U.S. Holder’s U.S. federal income tax liability that such U.S. Holder’s taxable income bears to such U.S. Holder’s worldwide taxable income. In applying this limitation, a U.S. Holder’s various items of income and deduction must be classified, under complex rules, as either “foreign source” or “U.S. source.” Recently issued U.S. Treasury regulations, which apply to foreign taxes paid or accrued in taxable years beginning on or after December 28, 2021, may in some circumstances prohibit a U.S. Holder from claiming a foreign tax credit with respect to certain foreign taxes that are not creditable under applicable tax treaties. The rules governing foreign tax credits are complex and U.S. Holders should consult their tax advisors regarding the creditability of foreign taxes in their particular circumstances. In addition, the creditability of foreign taxes could be affected by actions taken by intermediaries in the chain of ownership between the holders of our shares or ADSs representing our shares and our company if, as a result of such actions, the holders of our shares or ADSs representing our shares are not properly treated as beneficial owners of the underlying shares. Each U.S. Holder should consult its own tax advisors regarding the foreign tax credit rules.

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Sale or Other Taxable Disposition of Shares and ADSs Representing Our Shares

Subject to the discussion above under “Passive Foreign Investment Company Rules,” gain or loss realized on the sale or other taxable disposition of our shares or ADSs representing our shares will be capital gain or loss, and will be long-term capital gain or loss if the U.S. Holder held the shares or ADSs representing our shares for more than one year. The amount of the gain or loss will equal the difference between the U.S. Holder’s adjusted tax basis in the shares or ADSs representing our shares disposed of and the amount realized on the disposition, in each case as determined in U.S. dollars. The adjusted tax basis in our shares or ADSs representing our shares generally will be equal to the cost of such shares or ADSs. This gain or loss will generally be U.S.-source gain or loss for foreign tax credit purposes. The deductibility of capital losses is subject to limitations.

If the consideration received by a U.S. Holder is not paid in U.S. dollars, the amount realized will be the U.S. dollar value of the payment received determined by reference to the spot rate of exchange on the date of the sale or other disposition. However, if the shares or ADSs representing our shares are treated as traded on an “established securities market” and you are either a cash basis taxpayer or an accrual basis taxpayer that has made a special election (which must be applied consistently from year to year and cannot be changed without the consent of the IRS), you will determine the U.S. dollar value of the amount realized in a non-U.S. dollar currency by translating the amount received at the spot rate of exchange on the settlement date of the sale. If you are an accrual basis taxpayer that is not eligible to or does not elect to determine the amount realized using the spot rate on the settlement date, you will recognize foreign currency gain or loss to the extent of any difference between the U.S. dollar amount realized on the date of sale or disposition and the U.S. dollar value of the currency received at the spot rate on the settlement date.

Information Reporting and Backup Withholding

U.S. Holders generally will be subject to information reporting requirements with respect to dividends on our shares or ADSs representing our shares and on the proceeds from the sale, exchange or disposition of our shares or ADSs representing our shares that are paid within the United States or through certain U.S.-related financial intermediaries, unless the U.S. Holder is an “exempt recipient.” In addition, U.S. Holders may be subject to backup withholding on such payments, unless the U.S. Holder provides a correct taxpayer identification number and a duly executed IRS Form W-9 or otherwise establishes an exemption. Backup withholding is not an additional tax, and the amount of any backup withholding from a payment to a U.S. Holder will be allowed as a credit against a U.S. Holder’s U.S. federal income tax liability and may entitle such holder to a refund, provided that the required information is timely furnished to the IRS.

Certain Reporting Requirements

U.S. Holders paying more than USD100,000 for our shares or ADSs representing our shares generally may be required to file IRS Form 926 reporting the payment of the offer price for our shares or ADSs representing our shares to us. Substantial penalties may be imposed upon a U.S. Holder that fails to comply. Each U.S. Holder should consult its own tax advisor as to the possible obligation to file IRS Form 926.

Information with Respect to Foreign Financial Assets

Certain U.S. Holders who are individuals (and, under regulations, certain entities) may be required to report information relating to our shares or ADSs representing our shares, subject to certain exceptions (including an exception for shares or ADSs representing our shares held in accounts maintained by certain U.S. financial institutions). Such U.S. Holders who fail to timely furnish the required information may be subject to a penalty. Additionally, if a U.S. Holder does not file the required information, the statute of limitations with respect to tax returns of the U.S. Holder to which the information relates may not close until three years after such information is filed. U.S. Holders should consult their tax advisers regarding their reporting obligations with respect to their ownership and disposition of our shares or ADSs representing our shares.

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Swiss Tax Considerations

Swiss Federal, Cantonal and Communal Individual Income Tax and Corporate Income Tax

Non-Resident Shareholders

Holders of shares or ADSs representing our shares who are not resident in Switzerland for tax purposes, and who, during the relevant taxation year, have not engaged in a trade or business carried on through a permanent establishment or fixed place of business situated in Switzerland for tax purposes (all such shareholders are hereinafter referred to as the “Non-Resident Shareholders”), will not be subject to any Swiss federal, cantonal and communal income tax on dividends and similar cash or in-kind distributions on ADSs representing our shares (including dividends on liquidation proceeds and stock dividends) (hereinafter referred to as the “Dividends”), distributions based upon a capital reduction or paid out of qualifying reserves from capital contributions recognized by the Swiss Federal Tax Administration on shares underlying the ADSs, or capital gains realized on the sale or other disposition of ADSs (see, however, “Swiss Federal Withholding Tax” below for a summary of Swiss federal withholding tax on Dividends).

Resident Private Shareholders

Swiss resident individuals who hold their ADSs as private assets (all such shareholders are hereinafter referred to as the “Resident Private Shareholders”) are required to include Dividends, but not distributions based upon a capital reduction or paid out of qualifying reserves from capital contributions of the shares underlying the ADSs, in their personal income tax return and are subject to Swiss federal, cantonal and communal income tax on any net taxable income for the relevant taxation period, including the Dividends, but not the distributions based upon a capital reduction or paid out of qualifying reserves from capital contributions. Capital gains resulting from the sale or other dispositions of ADSs are not subject to Swiss federal, cantonal and communal income tax, and conversely, capital losses are not tax-deductible for Resident Private Shareholders. See “Domestic Commercial Shareholders” below for a summary of the taxation treatment applicable to Swiss resident individuals, who, for income tax purposes, are classified as “professional securities dealers”.

Domestic Commercial Shareholders

Corporate and individual shareholders who are resident in Switzerland for tax purposes or otherwise subject to Swiss taxation and corporate and individual shareholder who are not resident in Switzerland, and who, in each case, hold their ADSs as part of a trade or business carried on in Switzerland, in the case of corporate and individual shareholders not resident in Switzerland, through a permanent establishment or fixed place of business situated, for tax purposes, in Switzerland, are required to recognize Dividends, distributions based upon a capital reduction or paid out of qualifying reserves from capital contributions received on shares underlying the ADSs and capital gains or losses realized on the sale or other disposition of ADSs in their income statement for the relevant taxation period and are subject to Swiss federal, cantonal and communal individual or corporate income tax, as the case may be, on any net taxable earnings for such taxation period. The same taxation treatment also applies to Swiss-resident private individuals who, for income tax purposes, are classified as “professional securities dealers” for reasons of, inter alia, frequent dealing, or leveraged investments in ADSs and other securities (the shareholders referred to in this paragraph), hereinafter for the purposes of this section, as the “Domestic Commercial Shareholders”). Domestic Commercial Shareholders who are corporate tax-payors may be eligible for participation relief in respect of Dividends and distributions based upon a capital reduction or paid out of qualifying reserves from capital contributions if the shares underlying the ADSs held by them as part of a Swiss business have an aggregate market value of at least CHF 1 million.

Swiss Cantonal and Communal Private Wealth Tax and Capital Tax

Non-Resident Shareholders

Non-Resident Shareholders are not subject to Swiss cantonal and communal private wealth tax or capital tax.

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Resident Private Shareholders and Domestic Commercial Shareholders

Resident Private Shareholders and Domestic Commercial Shareholders who are individuals are required to report their ADSs as part of private wealth or their Swiss business assets, as the case may be, and will be subject to Swiss cantonal and communal private wealth tax on any net taxable wealth (including the ADSs), in the case of Domestic Commercial Shareholders to the extent the aggregate taxable wealth is allocated in Switzerland. Domestic Commercial Shareholders who are corporate tax payors are subject to Swiss cantonal and communal capital tax on taxable capital to the extent the aggregate taxable capital is allocated to Switzerland.

Swiss Federal Withholding Tax

Dividends that the Company pays on the shares underlying the ADSs are subject to Swiss Federal withholding tax at a rate of 35% on the gross amount of the Dividend. The Company is required to withhold the Swiss federal withholding tax from the Dividend and remit it to the Swiss Federal Tax Administration. Distributions of the nominal value of the shares underlying the ADSs based upon a capital reduction or paid out of qualifying reserves from capital contributions are not subject to Swiss federal withholding tax.

The Swiss federal withholding tax on a Dividend will be refundable in full to a Resident Private Shareholder and to a Domestic Commercial Shareholder, who, in each case, inter alia, as a condition to refund, duly reports the Dividend in his or her individual income tax return as income or recognizes the Dividends in its income statement as earnings, as applicable.

A Non-Resident Shareholder may be entitled to a partial refund of the Swiss federal withholding tax on Dividend if the country of his or her residence for tax purposes has entered into a bilateral treaty for the avoidance of double taxation with Switzerland and the conditions of such treaty are met. Such shareholders should be aware that the procedures for claiming tax treaty benefits (and the time required for obtaining a refund) might be different from country to country. For example, a shareholder who is resident of the U.S. for the purposes of the bilateral treaty between the U.S. and Switzerland is eligible for a refund of the amount of the withholding tax in excess of the 15% treaty rate, provided such shareholder: (i) qualifies for benefits under this treaty and qualifies as beneficial owner of the Dividends; (ii) hold, directly or indirectly, less than 10% of the voting stock of the Company; (iii) does not qualify as a pension scheme or retirement arrangement for the purpose of the bilateral treaty; and (iv) does not conduct business through a permanent establishment or fixed base in Switzerland to which the ADSs are attributable. Such an eligible U.S. shareholder may apply for a refund of the amount of the withholding tax in excess of the 15% treaty rate. The applicable refund request form may be filed with the Swiss Federal Tax Administration following receipt of the dividend and the relevant deduction certificate, however no later than December 31 of the third year following the calendar year in which the dividend was payable.

Swiss Federal Securities Transfer Tax

Any dealings in the ADSs, where a bank or another securities dealer in Switzerland, as defined in the Swiss Federal Stamp Tax Act, acts as intermediary or is a party to the transaction, are, subject to certain exemptions provided for in the Swiss Federal Stamp Tax Act, subject to Swiss securities transfer tax at an aggregate tax rate of up to 0.15% of the consideration paid for such ADSs.

Swiss Issuance Stamp Duty

The Swiss issuance stamp duty of 1% is levied on the issuance of shares and increases in or contributions to the equity of Swiss tax resident corporations. Exemptions are available in tax neutral restructuring transactions. As a result, the issuance of shares by Company or any other increase in its equity may be subject to the issuance stamp duty unless the equity is increased in the context of a qualifying restructuring transaction.

International Automatic Exchange of Information in Tax Matters

On November 19, 2014, Switzerland signed the Multilateral Competent Authority Agreement, which is based on article 6 of the OECD/Council of Europe administrative assistance convention and is intended to ensure the uniform implementation of automatic exchange of information (the “AEOI”). The Federal Act on the International Automatic Exchange of Information in Tax Matters (the “AEOI Act”) entered into force on January 1, 2017. The AEOI Act is the legal basis for the implementation of the AEOI standard in Switzerland.

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The AEOI bas been introduced in Switzerland through bilateral agreements or multilateral agreements. The agreements have, and will be, concluded on the basis of guaranteed reciprocity, compliance with the principle of specialty (i.e., the information exchanged may only be used to assess and levy taxes (and for criminal tax proceedings)) and adequate data protection.

Based on such multilateral agreements and bilateral agreements and the implementing laws of Switzerland, Switzerland exchanges data in respect of financial assets, including the Shares, held in, and income derived thereon and credited to, accounts or deposits with a paying agent in Switzerland for the benefit of individuals resident in an EU member state or in a treaty state.

Swiss Facilitation of the Implementation of the U.S. Foreign Account Tax Compliance Act

Switzerland has concluded an intergovernmental agreement with the U.S. to facilitate the implementation of FATCA. The agreement ensures that the accounts held by U.S. persons with Swiss financial institutions are disclosed to the U.S. tax authorities either with the consent of the account holder or by means of group requests within the scope of administrative assistance. Information will not be transferred automatically in the absence of consent, and instead will be exchanged only within the scope of administrative assistance on the basis of the double taxation agreement between the U.S. and Switzerland. On October 8, 2014, the Swiss Federal Council approved a mandate for negotiations with the U.S. on changing the current direct-notification-based regime to a regime where the relevant information is sent to the Swiss Federal Tax Administration, which in turn provides the information to the U.S. tax authorities.

F. | Dividends and Paying Agents.

Not applicable.

G. | Statement by Experts.

Not applicable.

H. | Documents on Display.

We are subject to the information reporting requirements of the Exchange Act applicable to foreign private issuers and under those requirements will file reports with the SEC. Those reports may be inspected without charge at the locations described below. As a foreign private issuer, we are exempt from the rules under the Exchange Act related to the furnishing and content of proxy statements, and our officers, directors and principal shareholders are exempt from the reporting and short-swing profit recovery provisions contained in Section 16 of the Exchange Act. In addition, we are not required under the Exchange Act to file periodic reports and financial statements with the SEC as frequently or as promptly as United States companies whose securities are registered under the Exchange Act.

We maintain a corporate website at www.addextherapeutics.com. We intend to post our Annual Report on Form 20-F on our website promptly following it being filed with the SEC. Information contained on, or that can be accessed through, our website does not constitute a part of this Annual Report on Form 20-F. We have included our website address in this Annual Report on Form 20-F solely as an inactive textual reference. The Securities and Exchange Commission maintains a website (www.sec.gov) that contains reports, proxy and information statements and other information regarding registrants, such as Addex, that file electronically with the SEC.

I. | Subsidiary Information.

Not applicable.

J. | Annual Report to Security Holders.

Not required.

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Item 11. Quantitative and Qualitative Disclosures About Market Risk.

We operate primarily in Switzerland, Europe and in the United States and are therefore exposed to market risk, which represents the risk of loss that may impact our financial position due to adverse changes in financial market prices and rates. As of December 31, 2023, we had CHF 3.9 million of cash and cash equivalents and we had no debt. Between the closing date and the issuance date of our Annual Report on Form 20 - F, we have raised a total of CHF 5.2 million including CHF 5.0 million from the sale of our allosteric modulator drug discovery technology platform and a portfolio of preclinical programs and CHF 0.2 million under our sale agency agreement with Kepler Cheuvreux.

Interest Rate Risk

Our cash is held in readily available checking and money market accounts. As of December 31, 2023, Swiss francs balance represented 39.9% of the cash and cash equivalents of the company. Swiss banks have partially re-invoiced to their clients a part of the negative interests on Swiss franc deposit that they pay to the Swiss National Bank. For the year ended December 31, 2023 the effective negative interest rate on Swiss francs cash deposits paid by Addex was limited to −0.01%. As a result, a change in market interest rates would not have had any significant impact on our financial position or results of operations. As of December 31, 2023, we had no debt and, therefore, no material interest rate risk exposure.

Foreign Currency Exchange Risk

We operate primarily in Switzerland and Europe more broadly and our functional currency is the Swiss franc, and as a result, we are exposed to (1) transactional foreign exchange risk when we or a subsidiary enter into a transaction in a currency other than our or its functional currency and (2) translational foreign exchange risk when we translate financial statements of our foreign subsidiaries from their functional currency into Swiss francs.

Transactional Risk

Our expenses are generally denominated in the currencies of the countries where the relevant transaction takes place, which is primarily in Switzerland, the United States, and to a lesser extent in the Euro-zone countries and United Kingdom. Transactions in foreign currencies of our Swiss company are recorded in Swiss francs at the applicable exchange rate on the date of the relevant transaction. Our results of operations and cash flows are, therefore, subject to fluctuations due to changes in foreign currency exchange rates and may be adversely affected in the future due to changes in foreign currency exchange rates.

Translational Risk

Because our reporting currency is the Swiss franc, or CHF, we may be exposed to translation risk when the income statements of our subsidiaries located in countries outside Switzerland are converted into Swiss francs using the average exchange rate for the period, and whilst revenues and costs are unchanged in local currency, changes in exchange rates may lead to effects on the converted balances of revenue, costs and the result in Swiss francs.

To date, our risk management policy is to economically hedge 100% of anticipated transactions in each major currency for the subsequent 12 months.

Capital Risk

We are not regulated and not subject to specific capital requirements, however, we aim to be compliant with the specific needs of the Swiss law. To ensure that statutory capital requirements are met, we monitor capital periodically on an interim basis as well as annually. From time to time, we may take appropriate measures or propose capital increases at the shareholders’ meeting to ensure the necessary capital remains intact.

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Item 12. Description of Securities Other than Equity Securities.

A. | Debt Securities.

Not applicable.

B. | Warrants and Rights.

Not applicable.

C. | Other Securities.

Not applicable.

D. | American Depositary Shares.

Citibank, N.A., or Citibank, acts as the depositary for the ADSs representing our shares. Citibank’s depositary offices are located at 388 Greenwich Street, New York, New York 10013. ADSs represent ownership interests in securities that are on deposit with the depositary. ADSs may be represented by certificates that are commonly known as American Depositary Receipts, or ADRs. The depositary typically appoints a custodian to safekeep the securities on deposit. In this case, the custodian is Citibank Zurich, located at 25 Seestrasee, 8021 Zurich, Switzerland.

A deposit agreement among us, the depositary and the ADS holders sets out the ADS holder rights as well as the rights and obligations of the depositary. New York law governs the deposit agreement and the ADSs. A copy of the deposit agreement is incorporated by reference as an exhibit to this Annual Report.

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Fees and Charges

ADS holders are required to pay the following fees under the terms of the deposit agreement governing the terms of the ADS:

Service |  | Fee
● Issuance of ADSs (e.g., an issuance of ADS upon a deposit of shares, upon a change in the ADS(s)-to-shares ratio, or for any other reason), excluding ADS issuances as a result of distributions of shares) | ​ | ● Up to U.S. 5¢ per ADS issued
● Cancellation of ADSs (e.g., a cancellation of ADSs for delivery of deposited property, upon a change in the ADS(s)-to-shares ratio, or for any other reason) | ​ | ● Up to U.S. 5¢ per ADS cancelled
● Distribution of cash dividends or other cash distributions (e.g., upon a sale of rights and other entitlements) | ​ | ● Up to U.S. 5¢ per ADS held
● Distribution of ADSs pursuant to (i) stock dividends or other free stock distributions, or (ii) exercise of rights to purchase additional ADSs | ​ | ● Up to U.S. 5¢ per ADS held
● Distribution of securities other than ADSs or rights to purchase additional ADSs (e.g., upon a spin-off) | ​ | ● Up to U.S. 5¢ per ADS held
● ADS Services | ​ | ● Up to U.S. 5¢ per ADS held on the applicable record date(s) established by the depositary
● Registration of ADS transfers (e.g., upon a registration of the transfer of registered ownership of ADSs, upon a transfer of ADSs into DTC and vice versa, or for any other reason) | ​ | ● Up to U.S. 5¢ per ADS (or fraction thereof) transferred
● Conversion of ADSs of one series for ADSs of another series (e.g., upon conversion of Partial Entitlement ADSs for Full Entitlement ADSs, or upon conversion of Restricted ADSs (each as defined in the Deposit Agreement) into freely transferable ADSs, and vice versa). | ​ | ● Up to U.S. 5¢ per ADS (or fraction thereof) converted

​

ADS holders are also responsible for paying certain charges such as:

| ● | taxes (including applicable interest and penalties) and other governmental charges;

| ● | the registration fees as may from time to time be in effect for the registration of shares on the share register and applicable to transfers of shares to or from the name of the custodian, the depositary or any nominees upon the making of deposits and withdrawals, respectively;

| ● | certain cable, telex and facsimile transmission and delivery expenses;

| ● | the fees, expenses, spreads, taxes and other charges of the depositary and/or service providers (which may be a division, branch or affiliate of the depositary) in the conversion of foreign currency;

| ● | the reasonable and customary out-of-pocket fees and expenses incurred by the depositary in connection with compliance with exchange control regulations and other regulatory requirements applicable to shares, ADSs and ADRs; and

| ● | the fees, charges, costs and expenses incurred by the depositary, the custodian, or any nominee in connection with the ADR program.

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ADS fees and charges for (i) the issuance of ADSs, and (ii) the cancellation of ADSs are charged to the person for whom the ADSs are issued (in the case of ADS issuances) and to the person for whom ADSs are cancelled (in the case of ADS cancellations). In the case of ADSs issued by the depositary into DTC, the ADS issuance and cancellation fees and charges may be deducted from distributions made through DTC, and may be charged to the DTC participant(s) receiving the ADSs being issued or the DTC participant(s) holding the ADSs being cancelled, as the case may be, on behalf of the beneficial owner(s) and will be charged by the DTC participant(s) to the account of the applicable beneficial owner(s) in accordance with the procedures and practices of the DTC participants as in effect at the time. ADS fees and charges in respect of distributions and the ADS service fee are charged to the holders as of the applicable ADS record date. In the case of distributions of cash, the amount of the applicable ADS fees and charges is deducted from the funds being distributed. In the case of (i) distributions other than cash and (ii) the ADS service fee, holders as of the ADS record date will be invoiced for the amount of the ADS fees and charges and such ADS fees and charges may be deducted from distributions made to holders of ADSs. For ADSs held through DTC, the ADS fees and charges for distributions other than cash and the ADS service fee may be deducted from distributions made through DTC, and may be charged to the DTC participants in accordance with the procedures and practices prescribed by DTC and the DTC participants in turn charge the amount of such ADS fees and charges to the beneficial owners for whom they hold ADSs. In the case of (i) registration of ADS transfers, the ADS transfer fee will be payable by the ADS Holder whose ADSs are being transferred or by the person to whom the ADSs are transferred, and (ii) conversion of ADSs of one series for ADSs of another series, the ADS conversion fee will be payable by the Holder whose ADSs are converted or by the person to whom the converted ADSs are delivered.

In the event of refusal to pay the depositary fees, the depositary may, under the terms of the deposit agreement, refuse the requested service until payment is received or may set off the amount of the depositary fees from any distribution to be made to the ADS holder.

Note that the fees and charges that ADS holders may be required to pay may vary over time and may be changed by us and by the depositary. ADS holders will receive prior notice of such changes. The depositary may reimburse us for certain expenses incurred by us in respect of the ADR program, by making available a portion of the ADS fees charged in respect of the ADR program or otherwise, upon such terms and conditions as we and the depositary agree from time to time.

Taxes

You will be responsible for the taxes and other governmental charges payable on the ADSs and the securities represented by the ADSs. We, the depositary and the custodian may deduct from any distribution the taxes and governmental charges payable by holders and may sell any and all property on deposit to pay the taxes and governmental charges payable by holders. You will be liable for any deficiency if the sale proceeds do not cover the taxes that are due.

The depositary may refuse to issue ADSs, to deliver, transfer, split and combine ADRs or to release securities on deposit until all taxes and charges are paid by the applicable holder. The depositary and the custodian may take reasonable administrative actions to obtain tax refunds and reduced tax withholding for any distributions on your behalf. However, you may be required to provide to the depositary and to the custodian proof of taxpayer status and residence and such other information as the depositary and the custodian may require to fulfill legal obligations. You are required to indemnify us, the depositary and the custodian for any claims with respect to taxes based on any tax benefit obtained for you.

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PART II

Item 13. Defaults, Dividend Arrearages and Delinquencies.

Not applicable.

Item 14. Material Modifications to the Rights of Security Holders and Use of Proceeds.

April 2023 Financing

On April 3, 2023, the company entered into a securities purchase agreement pursuant to which it agreed to issued and sell to an investor, (a) in a private placement (i) warrants to purchase up to an aggregate of 31,578,948 shares represented by 263,157 ADSs, exercisable 90 days after the date of issuance at an exercise price of USD 20.00 per ADS, and (ii) pre-funded warrants to purchase up to 23,578,950 shares represented by 196,491 ADSs, which were exercisable 60 days after the date of issuance with a remaining exercise price of USD 0.20 per ADS and (b) in a concurrent registered direct offering of 7,999,998 shares in a form of 66,666 ADSs (“together, the “April 2023 Financing”). The April 2023 Financing was closed on April 5, 2023and the company received gross proceeds of USD 5.0 million, before deducting offering expenses payable by the company.

Concurrent with the April 2023 Financing, the 9,230,772 warrants in a form of 76,923 ADSs issued during December 2021 Financing and the 15,000,000 warrants in a form of 125,000 ADSs issued during July 2022 Financing were amended. Their exercise price has been reduced to USD 20.00 per ADS and their exercise period has been extended to April 5, 2028.

The ADSs were offered by the Company pursuant to an effective shelf registration statement on Form F-3, which was originally filed with the SEC on April 7, 2021 and was declared effective on April 13, 2021 (File No. 333-255089) and a prospectus supplement thereunder. In accordance with an associated registration rights in the securities purchase agreement, the Company filed a registration statement on Form F-1 covering the resale of ADSs underlying the warrants and pre-funded warrants issued in the April 2023 Financing on June 1, 2023, which was declared effective by the SEC on June 2, 2023 (File No. 333-271611). This registration statement covers as well, the warrants issued during the July 2022 Financing and the December 2021 Financing that were initially filled under registrations statement on Form F-1 No. 333-266995 and No. 333-262050 respectively.

Item 15. Disclosure Controls and Procedures.

Our Chief Executive Officer (principal executive officer) and Head of Finance (principal financial officer), after evaluating the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) of the Exchange Act) as of December 31, 2023, have concluded that, as of such date, our disclosure controls and procedures were effective and ensured that information required to be disclosed by us in reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer (principal executive officer) and Head of Finance (principal financial officer), to allow timely decisions regarding required disclosure and is recorded, processed, summarized and reported within the time periods specified by the SEC’s rules and forms.

Management’s Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal controls over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) and for the assessment of the effectiveness of our internal control over financial reporting. Under the supervision and with the participation of our Chief Executive Officer (principal executive officer) and Chief Financial Officer (principal financial officer), management assessed our internal control over financial reporting based upon the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this assessment, our management has concluded that our internal control over financial reporting was effective as of December 31, 2023.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements, and can only provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

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Attestation Report of the Registered Public Accounting Firm

This Annual Report does not include an attestation report of our registered public accounting firm. For as long as we are an “emerging growth company” under the JOBS Act, our independent registered public accounting firm will not be required to attest to the effectiveness of our internal controls over financial reporting pursuant to Section 404.

Changes in Internal Control Over Financial Reporting

There has been no change in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during the period covered by this Annual Report that has materially affected, or is reasonably likely to materially affect, internal control over financial reporting.

​

Item 16. [Reserved]

​

Item 16A. Audit Committee Financial Expert.

Our board of directors has determined that Jake Nunn is an “audit committee financial expert” as defined by SEC rules and has the requisite financial sophistication under the applicable rules and regulations of the Nasdaq Stock Market. Mr Nunn is independent as such term is defined in Rule 10A-3 under the Exchange Act and under the listing standards of the Nasdaq Stock Market.

​

Item 16B. Code of Business Conduct and Ethics.

We have adopted a Code of Business Conduct and Ethics, or the Code of Conduct, that is applicable to all of our employees, executive officers and directors. A copy of the Code of Conduct is available on our website at www.addextherapeuticscom. Information contained on, or that can be accessed through, our website does not constitute a part of this report and is not incorporated by reference herein. If we make any amendment to the Code of Ethics or grant any waivers, including any implicit waiver, from a provision of the Code of Ethics, we will disclose the nature of such amendment or waiver on our website to the extent required by the rules and regulations of the SEC. Under Item 16B of Form 20-F, if a waiver or amendment of the Code of Ethics applies to our principal executive officer, principal financial officer, principal accounting officer or controller and relates to standards promoting any of the values described in Item 16B(b) of Form 20-F, we are required to disclose such waiver or amendment on our website in accordance with the requirements of Instruction 4 to such Item 16B.

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Item 16C. Principal Accountant Fees and Services.

BDO AG has served as our independent registered public accounting firm for the 2023 and 2022 fiscal years. Our accountants billed the following fees to us for professional services in each of those fiscal years:

​

​ | ​ | ​ | ​ | ​
​ | ​ | For the years
​ | ​ | ended
​ | ​ | December 31,
​ |  | 2023 |  | 2022
​ |  | (CHF in thousands)
Audit Fees |  | 275 |  | 260
Audit‑Related Fees |  | 47 |  | 34
Tax Fees |  | — |  | —
Other Fees |  | — |  | —
Total |  | 322 |  | 294

​

“Audit Fees” consist of fees billed for the annual audit of our consolidated financial statements, and the statutory audit of our consolidated and stand-alone financial statements. Audit Fees also include services that only our independent external auditor can reasonably provide, such as the review of documents filed with the U.S. stock exchange.

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“Audit-Related Fees” consist of fees billed for assurance and related services that are reasonably related to the performance of the audit or review of its financial statements or that are traditionally performed by the external auditor, and mainly include services such as comfort letters issued in connection with securities offerings, due diligence and agreed-upon or expanded audit procedures.

“Tax Fees” consist of tax consultations, such as advice in connection with employees’ taxation arising from share-based compensation.

“Other Fees” consist of advisory services relating to the adoption or application of IFRS.

Audit and Non-Audit Services Pre-Approval Policy

To ensure the independence and objectivity of our external auditors, the provision of all non-audit services by the external auditors are pre- approved by our audit committee.

​

Item 16D. Exemptions from the Listing Standards for Audit Committees.

Not applicable.

​

Item 16E. Purchases of Equity Securities by the Issuer and Affiliated Purchasers.

Not applicable.

​

Item 16F. Change in Registrant’s Certifying Accountant.

Not applicable

Item 16G. Corporate Governance.

Summary of Significant Corporate Governance Differences from Nasdaq Listing Standards

As a “foreign private issuer,” as defined by the SEC, we are permitted to follow home country corporate governance practices, instead of certain corporate governance practices required by Nasdaq for U.S. domestic issuers. While we follow most Nasdaq corporate governance rules, we follow Swiss corporate governance practices in lieu of Nasdaq corporate governance rules as follows:

| ● | We do not comply with Nasdaq Rule 5605(b)(1), which would require that our board of directors be comprised of a majority of independent directors. Such requirements are not required under the laws of Switzerland. However, we do make an assessment of the independence of our directors under Swiss corporate governance practices and have concluded that the majority of our directors are independent based upon those standards.

| ● | We do not follow Nasdaq Rule 5605(d)(1) regarding the compensation committee charter or Nasdaq Rule 5605(d)(2) regarding compensation committee composition. Such requirements are not required under the laws of Switzerland. However, we do maintain a remuneration committee in line with Swiss law.

| ● | We do not follow Nasdaq Rule 5605(e)(1)(A) with respect to having director nominees selected by independent directors constituting a majority of our board’s independent directors in a vote in which only independent directors participate or Nasdaq Rule 5605(e)(2) regarding the adoption of a formal written charter or board resolution, as applicable, addressing the nominations process. Such requirements are not required under the laws of Switzerland.

| ● | We do not follow Nasdaq Rule 5620(c) regarding quorum requirements applicable to meetings of shareholders. Such quorum requirements are not required under the laws of Switzerland.

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We must comply with Nasdaq Rule 5640 Notification of Noncompliance and Rule 5640 Voting Rights. Further, we must have an audit committee that satisfies Rule 5605(c)(3), which addresses audit committee responsibilities and authority, and that consists of committee members that meet the independence requirements of Rule 5605(c)(2)(A)(ii), subject to a transition period for newly public companies.

Because we are a foreign private issuer, our directors and senior management are not subject to short-swing profit and insider trading reporting obligations under Section 16 of the Exchange Act. They and our other shareholders are, however, subject to the obligations to report changes in share ownership under Section 13 of the Exchange Act and related SEC Rules.

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Item 16H. Mine Safety Disclosure.

Not applicable.

Item 16I. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.

Not applicable.

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Item 16J. Insider Trading policies

Not applicable.

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Item 16K. Cybersecurity

Risk Management and Strategy

Safeguarding the Company’s information systems, assets, data, intellectual property and network infrastructure and ensuring that risks related to cybersecurity threats are appropriately managed is essential to maintaining a consistently high level of confidentiality, integrity and availability of our information systems; and the trust of our stakeholders, as well as meeting applicable regulatory requirements. We have implemented a multi-faceted cybersecurity risk management framework, which is integrated in our overall enterprise risk management system and processes.

Our cybersecurity team is tasked with assessing, identifying and managing risks related to cybersecurity threats and, is responsible for:

| ● | proactive detection and assessment of threats and vulnerabilities through vulnerability testing, penetration testing and attack simulation;

| ● | development of risk-based action plans to manage identified vulnerabilities and implementation of new protocols and infrastructure improvements;

| ● | cybersecurity incident investigations, with the assistance of third-party experts as required;

| ● | monitoring threats to sensitive data and unauthorized access to Company systems, with assistance of third-party data loss prevention software and a third-party security operations center;

| ● | developing and executing protocols to ensure that information regarding cybersecurity incidents is promptly shared with our chief information officer, executive leadership team, Audit Committee and Board, as appropriate, to allow for risk and materiality assessments and to consider disclosure and notice requirements;

| ● | developing and implementing periodic training on cybersecurity, information security and threat awareness; and

| ● | collaborating with law enforcement and other companies on cybersecurity incidents and best practices.

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We also use third - party service providers to perform a variety of functions throughout our business such as hosting companies and contract research organizations. We manage cybersecurity risks associated with our use of these providers using several approaches, as deemed necessary, including security questionnaires, review of compliance reports, audits and the imposition of information security contractual obligations on vendors.

For a description of the risks from cybersecurity threats that may materially affect us and how they may do so, see our risk factors under Item 3.D “Risk Factors” in this Annual Report on Form 20 - F.

Role of Management

Our chief information officer leads management’s assessment, identification and management of risks related to cybersecurity threats and reports directly to our Chief Executive Officer. The chief information officer receives regular briefings on cybersecurity matters including results of vulnerability testing and remediation, cyber incident response and progress on cybersecurity infrastructure initiatives.

Role of the Board of Directors

Our Board recognizes the importance of robust cybersecurity management programs and is actively engaged in overseeing and reviewing the Company’s cybersecurity risk profile and exposures.

The responsibilities of the Board include reviewing the cybersecurity threat landscape facing the Company, as well as our strategy, policies and procedures to mitigate cybersecurity risks and any significant cybersecurity incidents. The Board also considers the impact of emerging cybersecurity developments and regulations that may affect the Company.

The Board meets periodically with relevant members of management, who provide reports on cybersecurity matters including, among others: recent external cybersecurity threats and attack trends; updates to threat monitoring processes; the composition of our cybersecurity team; cybersecurity awareness training and stress testing; cybersecurity strategy; cybersecurity metrics, assessments and peer ratings; and cybersecurity programs. The Board has also directed management to be informed promptly and of any investigation of a material cybersecurity incident. The Board may, from time to time, engage third party advisors and experts, and meet with the Company’s external advisors on cybersecurity matters, as appropriate.

There were no cybersecurity incidents during the year ended December 31, 2023, that resulted in an interruption to our operations, known losses of any critical data or otherwise had a material impact on the Company’s strategy, financial condition or results of operations. However, the scope and impact of any future incident cannot be predicted. See “Item 3D—Risk Factors” for more information on how material cybersecurity attacks may impact our business.

PART III

Item 17. Financial Statements.

See pages F-1 through F-38 of this Annual Report on Form 20-F.

Item 18. Financial Statements.

Not applicable.

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Item 19. Exhibits.

List of exhibits:

​ | ​ | ​ | ​ | Incorporated by Reference
--- | --- | --- | --- | ---
Exhibit |  | Description |  | Schedule/ Form |  | File Number |  | Section/ Exhibit |  | File Date
1.1 | ​ | Articles of Association of Addex Therapeutics as of February 20, 2024 | ​ |  | ​ |  | ​ |  | ​ |
1.2 | ​ | Organizational Rules of the Registrant | ​ | F-1 | ​ | 333-235554 | ​ | 3.2 | ​ | Dec. 17, 2019
2.1 | ​ | Form of Deposit Agreement | ​ | F-6 POS | ​ | 333-235561 | ​ | (a) | ​ | Oct. 6, 2023
2.2 | ​ | Form of American Depositary Receipt (included in Exhibit 2.1) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2.3 | ​ | Form of Warrant issued by the Registrant to certain investors on March 28, 2018 | ​ | F-1 | ​ | 333-235554 | ​ | 4.3 | ​ | Dec. 17, 2019
2.4 | ​ | Description of Shares of the Registrant | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2.5 | ​ | Description of American Depositary Shares representing Ordinary Shares of the Registrant | ​ | F-1 | ​ | 333-235554 | ​ | “Description of American Depositary Shares” | ​ | Dec. 17, 2019
2.6 | ​ | Form of warrants and pre-funded warrants issued by the registrant to certain investors on December 16, 2021 | ​ | F-1 | ​ | 333-262050 | ​ | “The offering” | ​ | Jan. 07, 2022
2.7 | ​ | Form of warrants and pre-funded warrants issued by the registrant to certain investors on July 22, 2022 | ​ | F-1 | ​ | 333-266995 | ​ | “The offering” | ​ | Aug. 19, 2022
2.8 | ​ | Form of warrants and pre-funded warrants issued by the registrant to certain investors on April 3, 2023 and amendment of warrants issued on December 16, 2021 and July 22, 2022 | ​ | F-1/A | ​ | 333-271611 | ​ | “The offering” | ​ | June 1, 2023
4.1# | ​ | License Agreement between Ortho-McNeil Pharmaceuticals Inc and the Registrant, dated December 31, 2004, as amended | ​ | F-1 | ​ | 333-235554 | ​ | 10.1 | ​ | Dec. 17, 2019
4.2# | ​ | License Agreement between Indivior UK Limited and the Registrant, dated January 2, 2018 | ​ | F-1 | ​ | 333-235554 | ​ | 10.2 | ​ | Dec. 17, 2019
4.3 | ​ | Registration Rights Agreement among the Registrant and certain investors, dated March 22, 2018 | ​ | F-1 | ​ | 333-235554 | ​ | 10.3 | ​ | Dec. 17, 2019
4.4 | ​ | Addex Therapeutics Ltd Share Option Plan, as amended | ​ | S-8 | ​ | 333-255124 | ​ | 10.4 | ​ | Apr. 8, 2021
4.5 | ​ | Addex Therapeutics Ltd Share Option Plan, as amended on July 22, 2022 | ​ | 20-F | ​ | 001-39179 | ​ | ​ | ​ | ​
4.6 | ​ | Addex Therapeutics Ltd Equity Sharing Certificate Plan, as amended | ​ | F-1 | ​ | 333-235554 | ​ | 10.5 | ​ | Dec. 17, 2019
4.7# | ​ | Amendment No.1 to License Agreement between Indivior UK Limited and the Registrant, dated October 30, 2020 | ​ | F-1 | ​ | 333-235554 | ​ | 10.6 | ​ | Dec. 14, 2020
4.8# | ​ | Sale Agency Agreement between Addex Therapeutics Ltd and Kepler Cheuvreux | ​ | 20-F | ​ | 001-39179 | ​ | ​ | ​ | Mar. 11, 2021
4.10# | ​ | Amendment No.2 to License Agreement between Indivior UK Limited and the Registrant, dated July 26, 2021 | ​ | 20-F | ​ | 001-39179 | ​ | ​ | ​ | March 30, 2023
4.13# | ​ | Amendment No.3 to License Agreement between Indivior UK Limited and the Registrant effective on August 1, 2022 | ​ | F-1 | ​ | 333-266995 | ​ | 10.13 | ​ | Aug. 19, 2022
4.14# | ​ | Amendment No.4 to License Agreement between Indivior UK Limited and the Registrant, effective on November 1, 2022 | ​ | 20-F | ​ | 001-39179 | ​ | ​ | ​ | March 30, 2023
4.16# | ​ | Amendment to Sale Agency Agreement between Addex Therapeutics and Kepler Cheuvreux dated June 21, 2022 | ​ | F-1 | ​ | 333-266995 | ​ | 10.7 | ​ | Aug. 19, 2022

112

Table of Contents

​ | ​ | ​ | ​ | Incorporated by Reference
--- | --- | --- | --- | ---
Exhibit |  | Description |  | Schedule/ Form |  | File Number |  | Section/ Exhibit |  | File Date
4.17# | ​ | Amendment No. 2 to sale Agency Agreement between Addex Therapeutics and Kepler Cheuvreux dated July 25, 2023 | ​ | POSAM | ​ | 333-271611 | ​ | 10.19 | ​ | Aug. 10, 2023
4.19# | ​ | Amendment No.5 to License Agreement between Indivior UK Limited and the Registrant, dated August 2, 2023 | ​ | POSAM | ​ | 333-271611 | ​ | 10.20 | ​ | Aug. 10, 2023
4.20# | ​ | At the Market Offering Agreement, by and between Addex Therapeutics Ltd and H.C Wainwright & Co. LLC dated January 30, 2024 | ​ | 6-K | ​ | 001-39179 | ​ | 1.1 | ​ | Jan. 30, 2024
4.21# | ​ | Service agreement | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
8.1 | ​ | List of Subsidiaries | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
12.1 | ​ | Certification by the Principal Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
12.2 | ​ | Certification by the Principal Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
13.1 | ​ | Certification by the Principal Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
13.2 | ​ | Certification by the Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
15.1 | ​ | Consent of BDO AG | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
97.1 | ​ | Incentive Compensation Recoupment Policy | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
101.INS | ​ | XBRL Instance Document | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
101.SCH | ​ | XBRL Taxonomy Extension Schema Document | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
101.CAL | ​ | XBRL Taxonomy Extension Calculation Linkbase Document | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
101.LAB | ​ | XBRL Taxonomy Extension Label Linkbase Document | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
101.PRE | ​ | XBRL Taxonomy Extension Presentation Linkbase Document | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
101.DEF | ​ | XBRL Taxonomy Extension Definition Linkbase Document | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
104 | ​ | Cover Page interactive data file (formatted as inline XBRL) and contained in Exhibit 101) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

†Indicates a management contract or any compensatory plan, contract or arrangement.

#Confidential treatment has been granted from the Securities and Exchange Commission as to certain portions of this document.

​

113

Table of Contents

SIGNATURES

The Registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this Annual Report on its behalf.

Addex Therapeutics Ltd. | ​ | ​
/s/ TIM DYER | /s/ LÉNAIC TEYSSÉDOU
​ | ​ | ​ | ​
Name: | Tim Dyer | Name: | Lénaic Teyssédou
Title: | Chief Executive Officer | Title: | Head of Finance

​

Switzerland

Dated: April 18, 2024

​

​

114

Table of Contents

INDEX TO FINANCIAL STATEMENTS

| ​
Consolidated Financial Statements | ​
Report of Independent Registered Public Accounting Firm (Zurich, Switzerland; PCAOB ID#5988) | F-2
Consolidated Balance Sheets as at December 31, 2023 and 2022 | F-3
Consolidated Statements of Comprehensive Loss for the years ended December 31, 2023, 2022 and 2021 | F-4
Consolidated Statements of changes in Equity for the period from December 31, 2020 to December 31, 2023 | F-5
Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021 | F-8
Notes to the Consolidated Financial Statements | F-9

​

​

​

F-1

Table of Contents

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

(BDO AG; Zurich, Switzerland; PCAOB ID#5988)

Shareholders and Board of Directors

Addex Therapeutics Ltd

Geneva, Switzerland

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Addex Therapeutics Ltd (the “Company”) as of December 31, 2023 and 2022, the related consolidated statements of comprehensive loss, changes in equity, and cash flows for each of the three years in the period ended December 31, 2023, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board and Interpretations (“IFRS”).

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

BDO AG

/s/ Christoph Tschumi | /s/ Nigel Le Masurier

​

We have served as the Company’s auditor since 2020.

Zurich, Switzerland, April 18, 2024

​

F-2

Table of Contents

Consolidated Balance Sheets

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | December 31, | ​ | December 31,
​ |  | Notes |  | 2023 |  | 2022
​ | ​ | ​ | ​ | Amounts in Swiss francs
ASSETS | ​ | ​ |  | ​ | ​ | ​
Current assets |  |  |  |  |  |
Cash and cash equivalents |  | 6 |  | 3,865,481 |  | 6,957,086
Other financial assets |  | 7 |  | 848 |  | 3,165
Trade and other receivables | ​ | 7 | ​ | 110,361 | ​ | 416,875
Contract asset | ​ | 7 | ​ | 40,907 | ​ | 181,441
Prepayments |  | 7 |  | 217,008 |  | 270,394
Total current assets |  | ​ |  | 4,234,605 |  | 7,828,961
​ | ​ | ​ | ​ | ​ | ​ | ​
Non-current assets |  |  |  | ​ |  |
Right-of-use assets | ​ | 8 | ​ | 330,332 | ​ | 357,613
Property, plant and equipment |  | 9 |  | 22,604 |  | 41,121
Non-current financial assets |  | 10 |  | 54,344 |  | 54,355
Total non-current assets |  | ​ |  | 407,280 |  | 453,089
​ | ​ | ​ | ​ | ​ | ​ | ​
Total assets |  | ​ |  | 4,641,885 |  | 8,282,050
​ | ​ | ​ | ​ | ​ | ​ | ​
LIABILITIES AND EQUITY |  |  |  | ​ |  |
​ | ​ | ​ | ​ | ​ | ​ | ​
Current liabilities |  |  |  | ​ |  |
Current lease liabilities | ​ | 3.2 | ​ | 273,956 | ​ | 286,107
Payables and accruals |  | 11 |  | 2,384,350 |  | 2,996,004
Deferred income |  | 12 |  | 234,978 |  | —
Total current liabilities |  | ​ |  | 2,893,284 |  | 3,282,111
​ | ​ | ​ | ​ | ​ | ​ | ​
Non-current liabilities |  | ​ |  | ​ |  | ​
Non-current lease liabilities | ​ | 3.2 | ​ | 70,380 | ​ | 87,028
Retirement benefits obligations |  | 20 |  | 443,524 |  | —
Deferred income | ​ | 12 | ​ | 89,232 | ​ | —
Total non-current liabilities |  | ​ |  | 603,136 |  | 87,028
​ | ​ | ​ | ​ | ​ | ​ | ​
Equity |  | ​ |  | ​ |  | ​
Share capital |  | 13 |  | 1,843,545 |  | 1,153,483
Share premium |  | 13 |  | 266,194,689 |  | 269,511,610
Other equity |  | 13 |  | 64,620,223 |  | 64,620,223
Treasury shares reserve | ​ | 13 | ​ | (909,566) | ​ | (6,278,763)
Other reserves | ​ | ​ | ​ | 29,814,816 | ​ | 25,768,373
Accumulated deficit |  |  |  | (360,418,242) |  | (349,862,015)
Total equity |  |  |  | 1,145,465 |  | 4,912,911
​ | ​ | ​ | ​ | ​ | ​ | ​
Total liabilities and equity |  |  |  | 4,641,885 |  | 8,282,050

​

The accompanying notes form an integral part of these consolidated financial statements.

​

F-3

Table of Contents

Consolidated Statements of Comprehensive Loss

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | December 31, | ​ | December 31, | ​ | December 31,
​ |  | Notes |  | 2023 |  | 2022 |  | 2021
​ | ​ | ​ | ​ | Amounts in Swiss Francs
Revenue from contract with customer | ​ | 15 | ​ | 1,612,953 | ​ | 1,422,438 | ​ | 2,916,308
Other income | ​ | 16 | ​ | 34,116 | ​ | 22,521 | ​ | 236,997
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating costs | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Research and development | ​ | ​ | ​ | (6,962,486) | ​ | (14,665,462) | ​ | (12,840,540)
General and administration | ​ | ​ | ​ | (4,965,882) | ​ | (7,299,704) | ​ | (5,818,682)
Total operating costs | ​ | 17 | ​ | (11,928,368) | ​ | (21,965,166) | ​ | (18,659,222)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating loss | ​ | ​ | ​ | (10,281,299) | ​ | (20,520,207) | ​ | (15,505,917)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Finance income | ​ | ​ | ​ | 63,964 | ​ | 29,251 | ​ | 217,015
Finance expense | ​ | ​ | ​ | (338,892) | ​ | (313,257) | ​ | (63,012)
Finance result | ​ | 21 | ​ | (274,928) | ​ | (284,006) | ​ | 154,003
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net loss before tax | ​ | ​ | ​ | (10,556,227) | ​ | (20,804,213) | ​ | (15,351,914)
Income tax expense | ​ | 19 | ​ | — | ​ | — | ​ | —
Net loss for the year |  | ​ |  | (10,556,227) |  | (20,804,213) | ​ | (15,351,914)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic and diluted loss per share for loss attributable to the ordinary equity holders of the Company | ​ | 22 | ​ | (0.14) | ​ | (0.46) | ​ | (0.45)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive (loss)/ income |  | ​ |  | ​ |  | ​ | ​ |
Items that will never be reclassified to profit and loss: |  | ​ |  | ​ |  | ​ | ​ |
Remeasurements of retirement benefits obligation |  | 20 |  | (506,167) |  | 1,270,132 | ​ | 260,548
Items that may be classified subsequently to profit and loss: |  | ​ |  | ​ |  | ​ | ​ | ​
Exchange difference on translation of foreign operations |  | ​ |  | (2,000) |  | (345) | ​ | (295)
Other comprehensive (loss)/ income for the year, net of tax |  | ​ |  | (508,167) |  | 1,269,787 | ​ | 260,253
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total comprehensive loss for the year |  | ​ |  | (11,064,394) |  | (19,534,426) | ​ | (15,091,661)

​

The accompanying notes form an integral part of these consolidated financial statements.

​

​

F-4

Table of Contents

Consolidated Statements of Changes in Equity (1/3)

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ |  | ​ |  | ​ |  | Foreign |  | ​ |  | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Treasury | ​ | Currency | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Share | ​ | Share | ​ | Shares | ​ | Translation | ​ | Other | ​ | Accumulated | ​ | ​
​ |  | Notes |  | Capital |  | Premium |  | Reserve |  | Reserve |  | Reserves |  | Deficit |  | Total
Balance as of December 31, 2020 |  | ​ | ​ | 32,848,635 |  | 286,888,354 | ​ | (6,078,935) |  | (657,230) |  | 15,314,867 |  | (313,705,888) |  | 14,609,803
Net loss for the year |  | ​ | ​ | — |  | — | ​ | — |  | — |  | — |  | (15,351,914) |  | (15,351,914)
Other comprehensive income for the year |  | ​ | ​ | — |  | — | ​ | — |  | (295) |  | 260,548 |  | — |  | 260,253
Total comprehensive loss for the year |  | ​ | ​ | — |  | — | ​ | — |  | (295) |  | 260,548 |  | (15,351,914) |  | (15,091,661)
Issue of shares-third parties | ​ | 13 | ​ | 6,900,000 | ​ | 3,199,323 | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 10,099,323
Issue of treasury shares | ​ | 13 | ​ | 9,524,317 | ​ | — | ​ | (9,524,317) | ​ | — | ​ | — | ​ | — | ​ | —
Cost of share capital issuance | ​ | ​ | ​ | — | ​ | (1,865,475) | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (1,865,475)
Sales under shelf- registration | ​ | 13 | ​ | — | ​ | 3,882 | ​ | 3,759,402 | ​ | — | ​ | — | ​ | — | ​ | 3,763,284
Related costs of sales shelf- registration | ​ | ​ | ​ | — | ​ | (581,800) | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (581,800)
Sale of pre-funded warrants | ​ | 13 | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 5,470,141 | ​ | — | ​ | 5,470,141
Cost of pre-funded warrants sold | ​ | ​ | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (848,998) | ​ | — | ​ | (848,998)
Value of warrants and pre-funded warrants | ​ | 13 | ​ | — | ​ | (3,720,491) | ​ | — | ​ | — | ​ | 3,720,491 | ​ | — | ​ | —
Value of share-based services | ​ | 14 | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 1,178,344 | ​ | — | ​ | 1,178,344
Other movements in treasury shares: | ​ | 13 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Settlement of supplier invoices | ​ | ​ | ​ | — | ​ | 48,066 | ​ | 116,914 | ​ | — | ​ | — | ​ | — | ​ | 164,980
Net purchases under liquidity agreement | ​ | ​ | ​ | — | ​ | (31,502) | ​ | (16,283) | ​ | — | ​ | — | ​ | — | ​ | (47,785)
Other net sales of treasury shares | ​ | ​ | ​ | — | ​ | 41,004 | ​ | 39,940 | ​ | — | ​ | — | ​ | — | ​ | 80,944
Balance as of December 31, 2021 | ​ | ​ | ​ | 49,272,952 | ​ | 283,981,361 | ​ | (11,703,279) | ​ | (657,525) | ​ | 25,095,393 | ​ | (329,057,802) | ​ | 16,931,100

​

The accompanying notes form an integral part of these consolidated financial statements.

F-5

Table of Contents

Consolidated Statements of Changes in Equity (2/3)

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | Foreign |  | ​ |  | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Treasury | ​ | Currency | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Share | ​ | Share | ​ | ​ | ​ | Shares | ​ | Translation | ​ | Other | ​ | Accumulated | ​ | ​
​ | ​ | Notes | ​ | Capital | ​ | Premium | ​ | Other equity | ​ | Reserve | ​ | Reserve | ​ | Reserves | ​ | Deficit | ​ | Total
Balance as of December 31, 2021 | ​ | ​ | ​ | 49,272,952 | ​ | 283,981,361 | ​ | — | ​ | (11,703,279) | ​ | (657,525) | ​ | 25,095,393 | ​ | (329,057,802) | ​ | 16,931,100
Net loss for the year | ​ | ​ | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (20,804,213) | ​ | (20,804,213)
Other comprehensive income for the year | ​ | ​ | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (345) | ​ | 1,270,132 | ​ | — | ​ | 1,269,787
Total comprehensive loss for the year | ​ | ​ | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (345) | ​ | 1,270,132 | ​ | (20,804,213) | ​ | (19,534,426)
Reduction of the nominal value |  | 13 |  | (64,620,223) |  | — |  | 64,620,223 |  | — |  | — |  | — |  | — |  | —
Issue of treasury shares |  | 13 |  | 16,326,365 |  | — |  | — |  | (16,326,365) |  | — |  | — |  | — |  | —
Exercise ESOP & ESC (treasury shares IFRS 2) |  | 13/14 | ​ | 174,389 |  | — |  | — |  | (174,389) |  | — |  | — |  | — |  | —
Cost of shares issuance |  | ​ | ​ | — |  | (288,131) |  | — |  | — |  | — |  | — |  | — |  | (288,131)
Sales under shelf registration |  | 13 |  | — |  | (3,275,107) |  | — |  | 4,500,000 |  | — |  | — |  | — |  | 1,224,893
Related costs of sales shelf registration |  | ​ | ​ | — |  | (114,754) |  | — |  | — |  | — |  | — |  | — |  | (114,754)
Sale of pre-funded warrants |  | 13 |  | — |  | — |  | — |  | — |  | — |  | 2,841,270 |  | — |  | 2,841,270
Cost of pre-funded warrants sold |  | ​ |  | — |  | — |  | — |  | — |  | — |  | (301,841) |  | — |  | (301,841)
Exercise of pre-funded warrants |  | ​ |  | — |  | (8,792,756) |  | — |  | 15,978,570 |  | — |  | (7,160,573) |  | — |  | 25,241
Value of warrants and pre-funded warrants |  | 13 |  | — |  | (999,789) |  | — |  | — |  | — |  | 999,789 |  | — |  | —
Value of share-based services |  | 14 |  | — |  | — |  | — |  | — |  | — |  | 3,682,073 |  | — |  | 3,682,073
Movement in treasury shares: |  | 13 |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net purchases under liquidity agreement |  | ​ |  | — |  | (105,433) |  | — |  | 91,452 |  | — |  | — |  | — |  | (13,981)
Sales agency agreement |  | ​ |  | — |  | (890,294) |  | — |  | 1,355,248 |  | — |  | — |  | — |  | 464,954
Costs under sale agency agreement |  | ​ |  | — |  | (3,487) |  | — |  | — |  | — |  | — |  | — |  | (3,487)
Balance as of December 31, 2022 |  | ​ |  | 1,153,483 |  | 269,511,610 |  | 64,620,223 |  | (6,278,763) |  | (657,870) |  | 26,426,243 |  | (349,862,015) |  | 4,912,911

​

The accompanying notes form an integral part of these consolidated financial statements.

F-6

Table of Contents

Consolidated Statements of Changes in Equity (3/3)

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | Foreign |  | ​ |  | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Treasury | ​ | Currency | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Share | ​ | Share | ​ | ​ | ​ | Shares | ​ | Translation | ​ | Other | ​ | Accumulated | ​ | ​
​ |  | Notes |  | Capital |  | Premium |  | Other equity |  | Reserve |  | Reserve |  | Reserves |  | Deficit |  | Total
Balance as of January 1, 2023 | ​ | ​ | ​ | 1,153,483 | ​ | 269,511,610 | ​ | 64,620,223 | ​ | (6,278,763) | ​ | (657,870) | ​ | 26,426,243 | ​ | (349,862,015) | ​ | 4,912,911
Net loss for the year |  | ​ |  | — |  | — |  | — |  | — |  | — |  | — |  | (10,556,227) |  | (10,556,227)
Other comprehensive loss for the year |  | ​ |  | — |  | — |  | — |  | — |  | (2,000) |  | (506,167) |  | — |  | (508,167)
Total comprehensive loss for the year |  | ​ |  | — |  | — |  | — |  | — |  | (2,000) |  | (506,167) |  | (10,556,227) |  | (11,064,394)
Issue of treasury shares |  | 13 |  | 329,000 |  | — |  | — |  | (329,000) |  | — |  | — |  | — |  | —
Exercise ESOP (treasury shares IFRS 2) |  | 13/14 |  | 125,272 |  | — |  | — |  | (125,272) |  | — |  | — |  | — |  | —
Cost of treasury shares issuance |  | ​ |  | — |  | (30,804) |  | — |  | — |  | — |  | — |  | — |  | (30,804)
Sales under shelf registration |  | 13 |  | — |  | (920,069) |  | — |  | 2,079,828 |  | — |  | — |  | — |  | 1,159,759
Related costs of sales shelf registration |  | ​ |  | — |  | (36,747) |  | — |  | — |  | — |  | — |  | — |  | (36,747)
Sale of pre-funded warrants |  | 13 |  | — |  | — |  | — |  | — |  | — |  | 3,382,259 |  | — |  | 3,382,259
Cost of pre-funded warrants sold |  | ​ |  | — |  | — |  | — |  | — |  | — |  | (136,327) |  | — |  | (136,327)
Exercise of pre-funded warrants |  | ​ |  | 235,790 |  | 3,046,123 |  | — |  | — |  | — |  | (3,245,932) |  | — |  | 35,981
Costs of pre - funded warrants exercised | ​ | ​ | ​ | — | ​ | (53,445) | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (53,445)
Value of warrants and pre-funded warrants |  | 13 |  | — |  | (2,760,143) |  | — |  | — |  | — |  | 2,760,143 |  | — |  | —
Value of share-based services |  | 14 |  | — |  | — |  | — |  | — |  | — |  | 1,794,467 |  | — |  | 1,794,467
Movement in treasury shares: |  | 13 |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​
Net purchases under liquidity agreement |  | ​ |  | — |  | (817) |  | — |  | (1,504) |  | — |  | — |  | — |  | (2,321)
Sales agency agreement |  | 13 |  | — |  | (2,552,071) |  | — |  | 3,745,145 |  | — |  | — |  | — |  | 1,193,074
Costs under sale agency agreement |  | ​ |  | — |  | (8,948) |  | — |  | — |  | — |  | — |  | — |  | (8,948)
Balance as of December 31, 2023 |  | ​ |  | 1,843,545 |  | 266,194,689 |  | 64,620,223 |  | (909,566) |  | (659,870) |  | 30,474,686 |  | (360,418,242) |  | 1,145,465

​

The accompanying notes form an integral part of these consolidated financial statements.

​

​

​

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Table of Contents

Consolidated Statements of Cash Flows

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | December 31, | ​ | December 31, | ​ | December 31,
​ |  | Notes |  | 2023 |  | 2022 |  | 2021
​ | ​ | ​ | ​ | Amounts in Swiss francs
Net loss for the year |  |  |  | (10,556,227) |  | (20,804,213) | ​ | (15,351,914)
Adjustments for: |  |  |  | ​ |  | ​ | ​ | ​
Depreciation |  | 8/9 |  | 305,952 |  | 323,144 | ​ | 347,613
Lease modifications related to right-of-use assets | ​ | ​ | ​ | (318) | ​ | — | ​ | (127)
Value of share-based services |  | 14 |  | 1,794,467 |  | 3,682,073 | ​ | 1,178,344
Post-employment benefits | ​ | 20 | ​ | (62,643) | ​ | (11,393) | ​ | (150,464)
Finance cost/(income) net |  |  |  | 312,602 |  | 215,527 | ​ | (132,050)
Decrease in other financial assets |  | 7 |  | 2,317 |  | 13,980 | ​ | 47,785
Decrease / (increase) in trade and other receivables |  | 7 |  | 306,514 |  | (252,090) | ​ | (96,412)
Decrease / (increase) in contract asset |  | 7 |  | 140,534 |  | (21,805) | ​ | (159,636)
Decrease / (increase) in prepayments |  | 7 |  | 53,386 |  | 844,980 | ​ | (616,992)
(Decrease) / increase in payables and accruals |  |  |  | (613,205) |  | (427,388) | ​ | 883,837
Decrease in contract liability |  |  |  | — |  | — | ​ | (733,668)
(Decrease) / increase in deferred income |  | 12 |  | 324,210 |  | — | ​ | (86,481)
Services paid in shares | ​ | ​ | ​ | — | ​ | — | ​ | 164,980
Net cash used in operating activities |  |  |  | (7,992,411) |  | (16,437,185) | ​ | (14,705,185)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash flows from investing activities |  |  |  | ​ |  | ​ | ​ | ​
Purchase of property, plant and equipment |  | 9 |  | (6,842) |  | (581) | ​ | (31,549)
Proceeds from decrease in non-current financial assets |  | ​ |  | — |  | 3,553 | ​ | 1,236
Net cash from/(used in) investing activities |  |  |  | (6,842) |  | 2,972 | ​ | (30,313)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash flows from financing activities |  |  |  | ​ |  | ​ | ​ | ​
Proceeds from capital increase |  | ​ |  | — |  | — | ​ | 10,161,746
Costs / deferred costs paid on issue of shares |  |  |  | — |  | — | ​ | (1,698,782)
Proceeds from sale of treasury shares-shelf registration |  | 13 |  | 1,159,759 |  | 1,224,893 | ​ | 3,763,284
Costs paid on sale of treasury shares-shelf registration | ​ | ​ | ​ | (39,103) | ​ | (304,009) | ​ | (389,857)
Proceeds from sale of pre-funded warrants | ​ | 13 | ​ | 3,382,259 | ​ | 2,841,270 | ​ | 5,470,141
Costs paid on sale of pre-funded warrants | ​ | ​ | ​ | (141,822) | ​ | (576,117) | ​ | (569,228)
Proceeds from the exercise of pre-funded warrants | ​ | 13 | ​ | 35,981 | ​ | 25,241 | ​ | —
Costs paid on exercise of pre-funded warrants | ​ | ​ | ​ | (21,247) | ​ | — | ​ | —
Sales under sale agency agreement & liquidity agreement movements | ​ | 13 | ​ | 1,190,753 | ​ | 450,973 | ​ | 33,159
Costs paid on sale of treasury shares under sale agency agreement | ​ | ​ | ​ | (8,948) | ​ | (3,487) | ​ | (332)
Cost paid on issue of treasury shares | ​ | 13 | ​ | (53,600) | ​ | (248,354) | ​ | —
Principal element of lease payment | ​ | ​ | ​ | (281,793) | ​ | (288,076) | ​ | (309,617)
Interest received | ​ | 21 | ​ | 63,964 | ​ | 29,251 | ​ | 5,322
Interest paid |  | 21 |  | (21,607) |  | (48,897) | ​ | (63,012)
Net cash from financing activities |  |  |  | 5,264,596 |  | 3,102,688 | ​ | 16,402,824
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Increase/(decrease) in cash and cash equivalents |  |  |  | (2,734,657) |  | (13,331,525) | ​ | 1,667,326
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents at beginning of the year |  | 6 |  | 6,957,086 |  | 20,484,836 | ​ | 18,695,040
Exchange difference on cash and cash equivalents |  |  |  | (356,948) |  | (196,225) | ​ | 122,470
Cash and cash equivalents at end of the year |  | 6 |  | 3,865,481 |  | 6,957,086 | ​ | 20,484,836

​

The accompanying notes form an integral part of these consolidated financial statements.

​

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Table of Contents

Notes to the Consolidated Financial Statements

(Amounts in Swiss francs)

1. General information

Addex Therapeutics Ltd (the “Company”), formerly Addex Pharmaceuticals Ltd, and its subsidiaries (together, the “Group”) are a clinical stage pharmaceutical group applying its leading allosteric modulator drug discovery platform to discovery and development of small molecule pharmaceutical products, with an initial focus on central nervous system disorders.

The Company is a Swiss stockholding corporation domiciled c/o Addex Pharma SA, Chemin des Aulx 12, CH1228 Plan-les-Ouates, Geneva, Switzerland and the parent company of Addex Pharma SA, Addex Pharmaceuticals France SAS and Addex Pharmaceuticals Inc. Its registered shares are traded at the SIX, Swiss Exchange, under the ticker symbol ADXN. On January 29, 2020, the Group listed on the Nasdaq Stock Market, American Depositary Shares (ADSs) under the symbol “ADXN”, without a new issuance of securities. ADSs represents shares that continue to be admitted to trading on SIX Swiss Exchange.

These consolidated financial statements have been approved for issuance by the Board of Directors on April 17, 2024.

2. Summary of material accounting policies

The principal accounting policies applied in the preparation of these consolidated financial statements are set out below. These policies have been consistently applied to all the years presented, unless otherwise stated.

2.1 | Basis of preparation

The consolidated financial statements of Addex Therapeutics Ltd have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (“IASB”), and under the historical cost convention.

The preparation of financial statements in conformity with IFRS requires the use of certain critical accounting estimates. It also requires management to exercise its judgment in the process of applying the Group’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the consolidated financial statements are disclosed in note 4 “Material accounting estimates and judgements”.

Due to rounding, numbers presented throughout these consolidated financial statements, may not add up precisely to the totals provided. All ratios and variances are calculated using the underlying amount rather than the presented rounded amount.

Where necessary, comparative figures have been revised to conform with the current year 2023 presentation. In particular, the ADS numbers previously disclosed have been amended following the change in ADS ratio executed on October 23, 2023, from one ADS to six shares to a new ratio of one ADS to one hundred and twenty shares. The ADS ratio change had the same effect as a one to twenty ADS reverse split and except as otherwise indicated, all information in these consolidated financial statements gives retroactive effect to the ADS Ratio Change.

2.2 | Standards and interpretations published by the IASB

New and amended standards adopted by the Group

A number of new or amended standards and interpretations became applicable for financial periods beginning on or after January 1, 2023. Of the latter, the Group noted that the amendments of IAS 1 (disclosure of accounting policies) and IAS 8 (definition of accounting estimates) respectively relating to the definition of accounting estimate and the disclosure of accounting policies are relevant for the Group but did not have a material impact on the disclosures made in the consolidated financial statements.

There are other new standards, amendments to standards and interpretations which have been deemed by the Group as currently not relevant, hence are not listed or discussed further here.

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New standards and interpretations not yet adopted by the Group

The Group is currently assessing the potential impacts of the various new and revised standards and interpretations that will be mandatory from January 1, 2024 which the Group has not yet applied. Based on an analysis to date, the Group does not anticipate that these will have a material impact on the Group’s overall results and financial position. The Group is also assessing other new and revised standards which are not mandatory until after 2024.

2.3 | Consolidation

Subsidiaries are all entities over which the Group has control. The Group controls an entity when the Group is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. Subsidiaries are fully consolidated from the date on which control is transferred to the Group. They are de-consolidated from the date that control ceases.

The Company currently consolidates the financial operations of its three fully-owned subsidiaries, Addex Pharma SA, Addex Pharmaceuticals Inc., and Addex Pharmaceuticals France SAS.

Inter-company transactions, balances and unrealized gains on transactions between Group companies are eliminated. Unrealized losses are also eliminated unless the transaction provides evidence of an impairment of the asset transferred. Accounting policies of subsidiaries have been changed where necessary to ensure consistency with the policies adopted by the Group. The reporting date of all Group companies is December 31.

2.4 | Segment reporting

The Group operates in one segment, which is the discovery, development and commercialization of small-molecule pharmaceutical products. A single management team that reports to the Chief Executive Officer comprehensively manages the entire business. The chief operating decision-maker is the Chief Executive Officer who reviews the statement of operations of the Group on a consolidated basis, makes decisions and manages the operations of the Group as a single operating segment. The Group’s activities are not affected by any significant seasonal effect. Revenue is attributable to the Company’s country of domicile, Switzerland.

2.5 | Foreign currency transactions

Functional and presentation currency

Items included in the financial statements of each of the Group’s entities are measured using the currency of the primary economic environment in which the entity operates (“the functional currency”). The consolidated financial statements are presented in Swiss francs, which is the Group’s presentation currency.

Transactions and balances

Foreign currency transactions are translated into the functional currency using the exchange rates prevailing at the dates of the transactions or valuation where items are re-measured. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation at year-end exchange rates of monetary assets and liabilities denominated in foreign currencies are recognized in the statement of comprehensive loss.

Foreign exchange gains and losses that relate to borrowings and cash and cash equivalents are presented in the statement of comprehensive loss within ‘finance result’.

Group companies

The results and financial position of the Group’s subsidiary that has a functional currency different from the presentation currency are translated into the presentation currency as follows:

● | assets and liabilities for each balance sheet presented are translated at the closing rate at the date of that balance sheet;

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● | income and expenses for each statement of comprehensive loss are translated at the average exchange rate; and

● | all resulting exchange differences are recognized in other comprehensive loss.

2.6 | Property, plant and equipment

Property, plant and equipment are stated at historical cost less accumulated depreciation, and impairment (if any). Historical cost includes expenditure that is directly attributable to the acquisition of the item. Subsequent costs are included in the asset’s carrying amount or recognized as a separate asset, as appropriate, only when it is probable that future economic benefits associated with the item will flow to the Group and the cost of the item can be measured reliably. All other repairs and maintenance are charged to the statement of comprehensive loss during the financial period in which they are incurred. Depreciation is calculated using the straight-line method to allocate their cost to their residual values over their estimated useful lives as follows:

​

​ | ​ | ​
Computer equipment |  | 3 years
Laboratory equipment |  | 4 years
Furniture and fixtures |  | 5 years
Chemical library |  | 5 years

​

The assets’ residual values and useful lives are reviewed, and adjusted if appropriate, at each balance sheet date. An asset’s carrying amount is written down immediately to its recoverable amount if the asset’s carrying amount is greater than its estimated recoverable amount (see note 2.7). Gains and losses on disposals are determined by comparing proceeds with the carrying amount and are included in the statement of comprehensive loss.

2.7 | Financial assets

The Group has one category of financial assets, namely “trade and other receivables”. Trade and other receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. These assets are held for collection of contractual cash flows which represent solely the payment of principal and interest. They arise when the Group provides money, goods or services directly to a debtor with no intention of trading the receivable. They are included in current assets, except for maturities greater than 12 months after the balance sheet date, which are classified as non-current assets. Trade and other receivables are included in other current assets in the balance sheet (see note 7).

Trade and other receivables are initially measured at fair value and subsequently measured at amortized cost and are derecognized when settled.

The Group classifies a contract asset as a receivable when the Group’s right to consideration is unconditional. If the Group transfers control of goods or services to a customer before the customer pays consideration, the Group records either a contract asset or a receivable depending on the nature of the Group’s right to consideration for its performance. Contract assets and contract liabilities arising from the same contract are netted and presented as either a single net contract asset or net contract liability.

Impairment of financial assets

The Group recognizes a loss allowance for expected credit losses on trade and other receivables, contract assets and security rental deposits that are measured at amortized cost. The amount of expected credit losses is updated at each reporting date to reflect changes in credit risk since initial recognition of the respective financial instrument.

The Group always recognizes lifetime expected credit losses(“ECL”) for trade and other receivables and contract assets where applicable. The ECL on these financial assets are estimated using a provision matrix based on the Group’s historical credit loss experience, adjusted for factors that are specific to the debtors, general economic conditions and an assessment of both the current as well as the forecast direction of conditions at the reporting date, including time value of money where appropriate.

Lifetime ECL represents the ECL that will result from all possible default events over the expected life of a financial instrument. In contrast, 12-month ECL represents the portion of lifetime ECL that is expected to result from default events on a financial instrument that are possible within 12 months after the reporting date.

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2.8 | Cash and cash equivalents

Cash and cash equivalents include cash on hand, deposits held at call with banks and other short-term highly liquid investments with original maturities of three months or less. They are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Any bank overdrafts are not netted against cash and cash equivalents but are shown as part of current liabilities on the consolidated balance sheet.

2.9 | Share capital

Shares are classified as equity. Incremental costs directly attributable to the issue of new shares are shown as a deduction, net of tax, from the proceeds.

Where any Group company purchases the Company’s equity share capital (treasury shares), the consideration paid, including any directly attributable incremental cost (net of income taxes) is recorded as a deduction from equity attributable to the Company’s equity holders as a treasury share reserve until the shares are cancelled, reissued or disposed of. When such shares are subsequently sold or reissued, any consideration received, net of any directly attributable incremental transaction costs and the related income tax effect, the nominal amount is reversed from the treasury share reserve, with any remaining difference to the total transaction value being recognized in share premium.

The Company has entered into a liquidity contract where an independent broker buys and sells the Company’s shares held in the broker’s custody. Such shares are presented in the treasury share reserve with all other treasury shares directly held by Addex Pharma SA.

The Group also uses treasury shares to partially settle services rendered by third and related parties. When shares are issued for this purpose, the nominal share value is recognized as a treasury share reserve and the value above par is presented as a share premium.

2.10 | Equity instruments

Shares issued by the Group and the sale of pre-funded warrants are both recorded at the fair value of the proceeds received, net of direct issuance costs. The fair value of pre-funded warrants sold is recorded in equity at the grant date. The Group grants as well from time-to-time warrants to brokers and investors. The fair value of the warrants is recorded in equity at the grant date.

2.11 | Trade payables

Trade payables are recognized initially at fair value and subsequently measured at amortized cost using the effective interest method. All payables have a contract maturity within 1 year.

2.12 | Grants

Grants are not recognized until there is reasonable assurance that the Group will comply with the terms and conditions of the grant and that the grants will be received. Grants are recognized as other income in the statement of comprehensive loss on a systematic basis over the periods in which the Group recognizes as expenses the related costs for which the grant is intended to compensate. Specifically, grants whose primary conditions are that the Group should undertake specific research activities within a defined period of time, are recognized as deferred income in the consolidated statement of financial position and transferred to the statement of comprehensive loss on a systematic and rationale basis over the defined timeframe.

2.13 | Deferred income tax

Deferred income tax is recorded in full, using the liability method, on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the consolidated financial statements. However, if the deferred income tax arises from initial recognition of an asset or liability in a transaction other than a business combination that at the time of the transaction affects neither accounting nor taxable profit or loss, it is not accounted for. Deferred income tax is determined using tax rates and laws that have been enacted or substantively enacted by the balance sheet date and are expected to apply when the related deferred income tax asset is realized, or the deferred income tax liability is settled.

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Deferred income tax assets are recognized to the extent that it is probable that future taxable profit will be available against which the temporary differences can be utilized.

Deferred income tax is recorded on temporary differences arising on investments in subsidiaries, except where the Group deems it probable that the temporary difference will not reverse in the foreseeable future.

Potential deferred income tax assets from tax loss carry forwards exceed deferred tax liabilities. Deferred income tax assets from tax loss carry forwards are initially recognized to the extent that the realization of the related tax benefit through future taxable profits is probable.

2.14 | Pension obligations

The Group operates one pension scheme. The scheme is generally funded through payments to insurance companies or trustee-administered funds, determined by periodic actuarial calculations. The Group has defined benefit plans. A defined benefit plan is a pension plan that defines an amount of pension benefit that an employee will receive on retirement, usually dependent on one or more factors such as age, years of service and compensation. Actuarial gains and losses arising from experience adjustments, changes in actuarial assumptions and changes in the asset ceiling effect are recognized immediately in other comprehensive loss and past-service costs are recognized immediately in statement of comprehensive loss.

Under IAS 19, the shortfall or the surplus of the fair value of the plan assets compared with the defined benefit obligation is recorded as a liability or an asset in the consolidated balance sheet. That recognition is subject to asset ceiling rules and minimum funding requirements set out in IFRIC 14. The defined benefit obligation is calculated at least annually by an independent actuary using the projected unit credit method. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid, and that have terms to maturity approximating to the terms of the related pension liability.

2.15 | Share-based compensation

The Group operates an equity sharing certificates’ equity incentive plan, a share option plan, and a share purchase plan. The fair value of the services received in exchange for the grant or transfer of equity sharing certificates, options, shares is recognized in the consolidated financial statements over the period for which the services are received. The total amount to be recognized over the vesting period is determined by reference to the fair value of the equity incentive unit granted or transferred. The fair value of instruments granted includes any market performance conditions and excludes the impact of any service and non-market performance vesting conditions. Service and non-market performance conditions are included in assumptions about the number of equity incentive units that are expected to vest. At each balance sheet date, the Group revises its estimates for the number of equity incentive units that are expected to vest. It recognizes the impact of the revision to original estimates, if any, in the statement of comprehensive loss, with a corresponding adjustment to equity.

The proceeds received net of any directly attributable transaction costs are credited to share capital (nominal value) and share premium when the equity incentive units are exercised.

2.16 | Revenue recognition

The Group recognizes revenue from the license of intellectual property and providing research and development services:

License of intellectual property

If the license to the Group’s intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, the Group recognizes revenues when the license conveys a right of use, or there is a right of access to the underlying intellectual property. For licenses that are sold in conjunction with a related service, the Group uses judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time. If the performance obligation is settled over time, the Group determines the appropriate method of measuring progress for purposes of recognizing license revenue. The Group evaluates the measure of progress each reporting period and, if necessary, adjusts the measure of performance and related revenue recognition.

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Research and development services

The Group has an arrangement with its partner that includes deploying its employees for research and development activities. The Group assesses if these research and development activities are considered distinct in the context of the respective contract and, if so, they are accounted for as a separate performance obligation. This revenue is calculated based on the costs incurred (input method) in accordance with the respective contract and recorded within “Revenue from contract with customer” over time as the activities are performed.

Contract balances

The Group receives payments and determines credit terms from its customers for its various performance obligations based on billing schedules established in each contract. The actual timing of the income recognition, billings and cash collections may result in other current receivables, accrued revenue (contract assets), and deferred revenue (contract liabilities) being recorded on the balance sheet. Amounts are recorded as other current receivables when the Group’s right to consideration is unconditional. The Group does not assess whether a contract has a significant financing component if the expectation at contract inception is such that the period between payment by the customer and the transfer of the promised goods or services to the customer will be one year or less.

Under IFRS 15, the Group recognizes as revenue its non-refundable license fees, milestone, research activities and royalties when its customer obtains control of promised services, in an amount that reflects the consideration which the Group expects to receive in exchange for those rendered services. At contract inception, once the contract is determined to be within the scope of IFRS 15, the Group assesses the services promised within each contract and determine those that are performance obligations and assess whether each promised service is distinct. The Group uses the most likely method to estimate any variable consideration and include such consideration in the amount of the transaction price based on an estimated stand-alone selling price. Revenue is recognized for the respective performance obligation when (or as) the performance obligation is satisfied.

2.17 | Finance income and expense

Interest received or paid on cash and cash equivalents are classified in the statement of cash flows under financing activities.

2.18 | Leases

The Group assesses whether a contract is or contains a lease, at inception of the contract. The Group recognizes a right-of-use asset and a corresponding lease liability with respect to all lease arrangements in which it is the lessee, except for short-term leases (defined as leases with a lease term of 12 months or less) and leases of low value assets (less than USD 5 thousand). For these leases, the Group recognizes the lease payments as an operating expense on a straight-line basis over the term of the lease unless another systematic basis is more representative of the time pattern in which economic benefits from the leased assets are consumed.

The lease liability is initially measured at the present value of the lease payments as from the commencement date of the lease until the expected termination date. In determining the lease term, management consider all facts and circumstances that create an economic incentive to exercise an extension option, or not to exercise a termination option. Extension option are only considered if the lease is reasonably certain to be extended. The assessment of reasonable certainty is only revised if a significant event or a significant change in circumstances, that is within the control of the lessees, occurs.

The right-of-use assets comprise the initial measurement of the corresponding lease liability, lease payments made at or before the commencement day, less any lease incentives received and any initial direct costs. They are subsequently measured at cost less accumulated depreciation and impairment losses. They are depreciated over the shorter period of lease term and useful life of the underlying asset. If a lease transfers ownership of the underlying asset or the cost of the right-of-use asset reflects that the Group expects to exercise a purchase option, the related right-of-use asset is depreciated over the useful life of the underlying asset. The depreciation starts at the commencement date of the lease. The right-of-use assets are presented as a separate line in the consolidated statement of financial position.

All lease payments on leases are presented as part of the cash flow from financing activities, except for the short-term and low value leases cash flows, which are booked under operating activities.

​

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2.19 | Research and development

Research and development costs are expensed as incurred. Costs incurred on development projects are recognized as intangible assets when the following criteria are fulfilled:

● | it is technically feasible to complete the intangible asset so that it will be available for use or sale;

● | management intends to complete the intangible asset and use or sell it;

● | there is an ability to use or sell the intangible asset;

● | it can be demonstrated how the intangible asset will generate probable future economic benefits;

● | adequate technical, financial and other resources to complete the development and to use or sell the intangible asset are available; and

● | the expenditure attributable to the intangible asset during its development can be reliably measured.

In the opinion of management, due to uncertainties inherent in the development of the Group’s products, the criteria for development costs to be recognized as an asset, as prescribed by IAS 38, “Intangible Assets”, are not met.

3. Financial risk management

3.1 | Financial risk factors

The Group’s activities expose it to a variety of financial risks: market risk, credit risk, liquidity risk and capital risk. The Group’s overall risk management program focuses on the unpredictability of financial markets and seeks to minimize potential adverse effects on the Group’s financial performance. Risk management is carried out by the Group’s finance department (Group Finance) under the policies approved by the Board. Group Finance identifies, evaluates and in some instances economically hedges financial risks in close co-operation with the Group’s operating units. The Board provides written guidance for overall risk management, as well as written policies covering specific areas, such as foreign exchange risk, interest-rate risk, use of derivative financial instruments and non-derivative financial instruments, credit risk and investing excess liquidity.

Market risk and foreign exchange risk

The Group operates internationally and is exposed to foreign exchange risk arising from various exposures with respect to the Euro, US dollar and UK pound. Foreign exchange risk arises from future commercial transactions, recognized assets and liabilities and net investments in foreign operations. To manage foreign exchange risk Group Finance maintains foreign currency cash balances to cover anticipated future requirements. The Group’s risk management policy is to economically hedge 50% to 100% of anticipated transactions in each major currency for the subsequent 12 months. The Group has a subsidiary in France and in United States of America, whose net assets are exposed to foreign currency translation risk. In 2023, a 10% increase or decrease in the EUR/CHF exchange rate would have resulted in a CHF 4,901 (respectively a CHF 7,945 decrease or increase in 2022 and CHF 7,948 increase or decrease in 2021) decrease or increase in net loss and shareholders’ equity as at December 31, 2023 a 10% increase or decrease in the GBP/ CHF exchange rate would have resulted in a CHF 15,203 decrease or increase in net loss and shareholders’ equity as at December 31, 2023 (respectively a CHF 1,470 increase or decrease in 2022 and CHF 17,893 decrease or increase in 2021) and a 10% increase or decrease in the USD/CHF exchange rate would have resulted in a CHF 166,581 (respectively CHF 175,837 in 2022 and CHF 1,027,027 in 2021) increase or decrease in net loss and shareholders’ equity as at December 31,2023. The Group is not exposed to equity price risk or commodity price risk as it does not invest in these classes of investment.

Interest rate risk

The Group’s exposure to interest rate fluctuations is limited because the Group has no interest-bearing indebtedness.

​

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Credit risk

Credit risk is managed on a Group basis. Credit risk arises from cash and cash equivalents and deposits with banks, as well as credit exposures to collaboration partners. The Group has a limited number of collaboration partners and consequently has a significant concentration of credit risk. The Group has policies in place to ensure that credit exposure is kept to a minimum and significant concentrations of credit risk are only granted for short periods of time to high credit quality partners. The Group’s policy is to invest funds in low-risk investments including interest bearing deposits. For banks and financial institutions, only independently rated parties with a minimum rating of “A” are accepted (see note 6).

Liquidity risk

The Group’s principal source of liquidity is its cash reserves which are obtained through the sale of new shares and to a lesser extent the sale of its research and development stage products. Group Finance monitors rolling forecasts of the Group’s liquidity requirements to ensure it has sufficient cash to meet operational needs. The ability of the Group to maintain adequate cash reserves to sustain its activities is highly dependent on the Group’s ability to raise further funds from the licensing of its development stage products and the sale of new shares. Consequently, the Group is exposed to significant liquidity risk (see note 4).

3.2 | Capital risk management

The Group is not regulated and not subject to specific capital requirements. The amount of equity depends on the Group’s funding needs and statutory capital requirements. The Group monitors capital periodically on an interim and annual basis. From time to time, the Group may take appropriate measures or propose capital increases to its shareholders to ensure the necessary capital remains intact. The Group did not have any short-term or long-term debt outstanding as of December 31, 2023 and 2022.

The ability of the Group to maintain adequate cash reserves to continue its activities is subject to risk as it is highly dependent on the Group’s ability to raise further funds from the sale of new shares.

The Group’s objectives when managing capital based on its net debt are to safeguard the Group’s ability to continue as a going concern in order to ensure the financing of successful research and development activities so that future profits can be generated and to maintain sufficient financial resources to mitigate against risks and unforeseen events.

A reconciliation of the net debt position is detailed as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Cash and |  | Other |  | ​
​ | ​ | ​ | ​ | cash | ​ | financial |  | ​
​ |  | Leases |  | equivalents |  | assets |  | Total
Net debt as at January 1, 2022 |  | (482,014) | ​ | 20,484,836 | ​ | 17,145 | ​ | 20,019,967
Cash flows |  | 288,076 | ​ | (13,331,525) | ​ | (13,980) | ​ | (13,057,429)
Effect of modification to lease terms |  | (179,197) | ​ | — | ​ | — | ​ | (179,197)
Foreign exchange differences | ​ | — | ​ | (196,225) | ​ | — | ​ | (196,225)
Net debt as at December 31, 2022 |  | (373,135) | ​ | 6,957,086 | ​ | 3,165 | ​ | 6,587,116
Cash flows |  | 281,793 | ​ | (2,734,657) | ​ | (2,317) | ​ | (2,455,181)
Effect of modification to lease terms | ​ | (252,994) | ​ | — | ​ | — | ​ | (252,994)
Foreign exchange differences |  | — | ​ | (356,948) | ​ | — | ​ | (356,948)
Net debt as at December 31, 2023 |  | (344,336) | ​ | 3,865,481 | ​ | 848 | ​ | 3,521,993

​

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Table of Contents

In addition, the maturity profile of the Group’s financial liabilities is presented in the table below:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | More |  | Total |  | Carrying
​ | ​ | Less than | ​ | 1 to 5 | ​ | than | ​ | cash out | ​ | amount
At December 31, 2023 | ​ | 1 Year | ​ | Years | ​ | 5 Years | ​ | flows | ​ | liabilities
Lease Liabilities |  | 293,399 | ​ | 72,350 | ​ | — | ​ | 365,749 | ​ | 344,336
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | More |  | Total |  | Carrying
​ | ​ | Less than | ​ | 1 to 5 | ​ | than | ​ | cash out | ​ | amount
At December 31, 2022 | ​ | 1 Year | ​ | Years | ​ | 5 Years | ​ | flows | ​ | liabilities
Lease Liabilities |  | 305,294 | ​ | 90,684 | ​ | — | ​ | 395,978 | ​ | 373,135

​

Lease liabilities relate to the rent of laboratories, equipment, offices and related spaces used by the Group.

3.3 | Fair value estimation

The nominal value less estimated credit adjustments of trade and other receivables, contract assets and payables are assumed to approximate to their fair values due to the short-term maturity of these instruments and are held at their amortized cost in accordance with IFRS 9. The fair value of other financial assets and liabilities for disclosure purposes is estimated by discounting the future contractual cash flows at the current market interest rate that is available to the Group for similar financial instruments.

4.Material accounting estimates and judgments

The Group makes estimates and assumptions concerning the future. These estimates and judgments are continually evaluated and are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances. The resulting accounting estimates will, by definition, seldom equal the related actual results. The estimates and assumptions that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities or may have had a significant impact on the reported results are disclosed below:

Going concern

The Group’s accounts are prepared on a going concern basis. To date, the Group has financed its cash requirements primarily from share issuances, licensing certain of its research and development stage products and selling its allosteric modulator drug discovery technology platform and a portfolio of pre - clinical programs. The Group is a development - stage enterprise and is exposed to all the risks inherent in establishing a business. The Group expects that its existing cash and cash equivalents, at the issuance date of these audited consolidated financial statements will be sufficient to fund its operations and meet all of its obligations as they fall due, through 2026. The future viability of the Group is dependent on its ability to raise additional capital through public or private financings or collaboration agreements to finance its future operations, which may be delayed due to reasons outside of the Group’s control including health pandemics and geopolitical risks. The sale of additional equity may dilute existing shareholders. The inability to obtain funding, as and when needed, would have a negative impact on the Group’s financial condition and ability to pursue its business strategies. If the Group is unable to obtain the required funding to run its operations and to develop and commercialize its product candidates, the Group could be forced to delay, reduce or stop some or all of its research and development programs to ensure it remains solvent. Management continues to explore options to obtain additional funding, including through collaborations with third parties related to the future potential development and/or commercialization of its product candidates. However, there is no assurance that the Group will be successful in raising funds, closing collaboration agreements, obtaining sufficient funding on terms acceptable to the Group, or if at all, which could have a material adverse effect on the Group’s business, results of operations and financial condition.

​

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Table of Contents

The Business of the Group could be adversely affected by health pandemics and geopolitical risks

The business of the Group could be adversely affected by health epidemics and geopolitical risks in regions where the Group or partners have concentrations of clinical trial sites or other business operations and could cause significant disruption in the operations of third-party manufacturers and CROs upon whom the Group or partners rely. Health pandemics may pose the risk that the Group, employees, contractors, collaborators, and partners may be prevented from conducting certain pre-clinical tests, clinical trials or other business activities for an indefinite period of time, including due to travel restrictions, quarantines, “stay-at-home” and “shelter-in-place” orders or shutdowns that have been or may in the future be requested or mandated by governmental authorities. For example, the COVID-19 pandemic has impacted and could in the future impact the business of the Group and ongoing and planning clinical trials led by the Group or partners, including as a result of delays or difficulties in clinical site initiation, difficulties in recruiting and retaining clinical site investigators and clinical site staff and interruption of the clinical supply chain or key clinical trial activities, such as clinical trial site monitoring, and supply chain interruptions caused by restrictions for the supply of materials for drug candidates or other materials necessary to manufacture product to conduct clinical and preclinical tests. Geopolitical risks such as Russia-Ukraine war or Middle East conflict may create global security concerns including the possibility of an expanded regional or global conflict and potential ramifications such as disruption of the supply chain including research and development activities being conducted by the Group and its strategic partners. The Group and partners rely on global networks of contract research organizations to engage clinical study sites and enroll patients, certain of which are in Russia and Ukraine. Delays in research and development activities of the Group and its partners could increase associated costs and, depending upon the duration of any delays, require the Group and its partners to find alternative suppliers at additional expense. In addition, Russia-Ukraine war has had significant ramifications on global financial markets, which may adversely impact the ability of the Group to raise capital on favorable terms or at all.

Revenue recognition

Revenue is primarily from fees related to licenses, milestones and research services. Given the complexity of the relevant agreements, judgements are required to identify distinct performance obligations; allocate the transaction price to these performance obligations and determine when the performance obligations are met. In particular, the Group’s judgement over the estimated stand-alone selling price which is used to allocate the transaction price to the performance obligations is disclosed in note 15.

Grants

Grants are recorded at their fair value when there is reasonable assurance that they will be received and recognized as income when the Group has satisfied the underlying grant conditions. In certain circumstances, grant income may be recognized before explicit grantor acknowledgement that the conditions have been met.

Accrued research and development costs

The Group records accrued expenses for estimated costs of research and development activities conducted by third party service providers. The Group records accrued expenses for estimated costs of research and development activities based upon the estimated amount of services provided, but not yet invoiced, and these costs are included in accrued expenses on the balance sheets and within research and development expenses in the statements of comprehensive loss. These costs are a significant component of research and development expenses. Accrued expenses for these costs are recorded based on the estimated amount of work completed in accordance with agreements established with these third parties.

Due to the nature of estimates, the Group may be required to make changes to the estimates after a reporting period as it becomes aware of additional information about the status or conduct of its research activities.

​

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Table of Contents

Share-based compensation

The Group recognizes an expense for share-based compensation based on the valuation of equity incentive units using the Black-Scholes valuation model. A number of assumptions related to the volatility of the underlying shares and to the risk-free rate are made in this model. Should the assumptions and estimates underlying the fair value of these instruments vary significantly from management’s estimates, then the share-based compensation expense would be materially different from the amounts recognized. Had these assumptions been modified within their feasible ranges, i.e. a 20% increase or decrease in the volatility assumption for the twelve - month period ended December 31, 2023 (a 10% increase or decrease in the volatility assumption for the twelve - month period ended December 31, 2022 and 2021) and a risk-free rate of 1 or 0.5 for the twelve - month period ended December 31, 2023 (0.5 or 0 for the twelve - month period ended December 31, 2022 and 2021), and the Group calculated the share-based compensation based on the higher and lower values of these ranges, share-based compensation expense in 2023 would have been CHF 1.3 million or CHF 2.1 million, respectively CHF 3.0 million or CHF 4.3 million in 2022 and CHF 1.0 million or CHF 1.3 million in 2021. This is compared to the amount recognized as an expense in 2023 of CHF 1.8 million, respectively of CHF 3.7 million in 2022 and CHF 1.2 million and 2021. Additional information is disclosed in note 14.

Equity instruments

The group records in equity the pre - funded warrants sold to investors and the warrants granted to investors at a fair value whose valuation is calculated using Black - Scholes model.

Pension obligations

The present value of the pension obligations is calculated by an independent actuary and depends on a number of assumptions that are determined on an actuarial basis such as discount rates, future salary and pension increases, and mortality rates. Any changes in these assumptions will impact the carrying amount of pension obligations. The Group determines the appropriate discount rate at the end of each period. This is the interest rate that should be used to determine the present value of estimated future cash outflows expected to be required to settle the pension obligations. In determining the appropriate discount rate, the Group considers the interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid, and that have terms to maturity approximating the terms of the related pension liability. Other key assumptions for pension obligations are based in part on current market conditions. Additional information is disclosed in note 20.

5. Segment information

Management has identified one single operating segment, related to the discovery, development and commercialization of small-molecule pharmaceutical products.

Information about products, services and major customers

External income of the Group for the years ended December 31, 2023, 2022 and 2021 is derived from the business of discovery, development and commercialization of pharmaceutical products. Income was earned from rendering of research services to a pharmaceutical company and grants earned.

Information about geographical areas

External income is exclusively recorded in the Swiss operating company.

Analysis of revenue from contract with customer and other income by nature is detailed as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Collaborative research funding |  | 1,612,953 | ​ | 1,422,438 | ​ | 2,916,308
Grants earned |  | 29,881 | ​ | — | ​ | 218,330
Other service income |  | 4,235 | ​ | 22,521 | ​ | 18,667
Total |  | 1,647,069 | ​ | 1,444,959 | ​ | 3,153,305

​

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Table of Contents

Analysis of revenue from contract with customer and other income by major counterparties is detailed as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Indivior PLC |  | 1,612,953 | ​ | 1,422,438 | ​ | 2,916,308
Eurostars/Innosuisse | ​ | 29,881 | ​ | — | ​ | 218,330
Other counterparties |  | 4,235 | ​ | 22,521 | ​ | 18,667
Total |  | 1,647,069 | ​ | 1,444,959 | ​ | 3,153,305

​

For more detail, refer to note 15, “Revenue from contract with customer” and note 16 “Other Income”.

The geographical allocation of long-lived assets is detailed as follows:

​

​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2023 | ​ | 2022
Switzerland |  | 406,946 | ​ | 452,732
France |  | 334 | ​ | 357
Total |  | 407,280 | ​ | 453,089

​

The geographical analysis of operating costs is as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Switzerland |  | 11,912,110 | ​ | 21,933,056 | ​ | 18,619,123
United States of America | ​ | 11,890 | ​ | 27,513 | ​ | 33,016
France |  | 4,368 | ​ | 4,597 | ​ | 7,083
Total operating costs (note 17) |  | 11,928,368 | ​ | 21,965,166 | ​ | 18,659,222

​

There was capital expenditure of CHF 6,842 in 2023 and CHF 581 in 2022.

6. Cash and cash equivalents

​

​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2023 | ​ | 2022
Cash at bank and on hand |  | 3,865,481 | ​ | 6,957,086
Total cash and cash equivalents |  | 3,865,481 | ​ | 6,957,086

​

Split by currency:

​

​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31, |
​ | ​ | 2023 | ​ | 2022 |
CHF |  | 39.88 | % | 52.98 | %
USD |  | 56.22 | % | 42.10 | %
EUR |  | 3.03 | % | 2.69 | %
GBP |  | 0.87 | % | 2.23 | %
Total |  | 100.00 | % | 100.00 | %

​

The Group no longer pays interest on CHF cash and cash equivalents from the third quarter of 2022 whilst it earns interest on USD cash and cash equivalents. The Group invests its cash balances into a variety of current and deposit accounts mainly with one Swiss bank whose external credit rating is P-1/A-1.

All cash and cash equivalents were held either at banks or on hand as of December 31, 2023 and December 31, 2022.

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Table of Contents

Credit quality of cash and cash equivalents

The table below shows the cash and cash equivalents by credit rating of the major counterparties:

​

​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2023 | ​ | 2022
External credit rating of counterparty | ​ | ​ | ​ | ​
P-1 / A-1 |  | 3,269,523 | ​ | 3,708,603
P-2 / A-1 | ​ | 286,399 | ​ | 3,031,028
Other | ​ | 309,446 | ​ | 217,335
Cash on hand |  | 113 | ​ | 120
Total cash and cash equivalents |  | 3,865,481 | ​ | 6,957,086

​

External credit ratings of counterparties were obtained from Moody’s (P-) or Standard & Poor’s (A-).

7. Other current assets

​

​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2023 | ​ | 2022
Other financial assets |  | 848 | ​ | 3,165
Trade and other receivables |  | 110,361 | ​ | 416,875
Contract asset (Indivior PLC) |  | 40,907 | ​ | 181,441
Prepayments | ​ | 217,008 | ​ | 270,394
Total other current assets |  | 369,124 | ​ | 871,875

​

Other current assets decreased by CHF 0.5 million as of December 31, 2023 compared to December 31, 2022 mainly due to a decrease of CHF 0.4 million in the combined amount of contract assets, trade and other receivables, primarily related to the research agreement with Indivior for CHF 0.3 million and to the grant from Eurostars/Innosuisse for CHF 0.1 million. The Group applies the IFRS 9 simplified approach to measuring expected credit losses (“ECL”), which uses a lifetime expected loss allowance for all contract assets, trade receivables and other receivables. The Group has considered that the contract asset, trade receivables and other receivables have a low risk of default based on historic loss rates and forward-looking information on macroeconomic factors affecting the ability of the third parties to settle invoices. As a result, expected loss allowance has been deemed as nil as of December 31, 2023, 2022 and 2021.

​

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Table of Contents

8. Right-of-use assets

​

​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, 2022 |  | Properties |  | Equipment |  | Total
Opening net book amount |  | 456,885 | ​ | 13,104 | ​ | 469,989
Depreciation charge |  | (277,069) | ​ | (14,504) | ​ | (291,573)
Effect of lease modifications | ​ | 173,281 | ​ | 5,916 | ​ | 179,197
Closing net book amount |  | 353,097 | ​ | 4,516 | ​ | 357,613
​ | ​ | ​ | ​ | ​ | ​ | ​
As of December 31, 2022 |  | Properties |  | Equipment |  | Total
Cost |  | 1,471,850 | ​ | 13,542 | ​ | 1,485,392
Accumulated depreciation |  | (1,118,753) | ​ | (9,026) | ​ | (1,127,779)
Net book value |  | 353,097 | ​ | 4,516 | ​ | 357,613
​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, 2023 |  | Properties |  | Equipment |  | Total
Opening net book amount | ​ | 353,097 | ​ | 4,516 | ​ | 357,613
Depreciation charge | ​ | (277,885) | ​ | (2,708) | ​ | (280,593)
Effect of lease modifications | ​ | 253,312 | ​ | — | ​ | 253,312
Closing net book amount | ​ | 328,524 | ​ | 1,808 | ​ | 330,332
​ | ​ | ​ | ​ | ​ | ​ | ​
As of December 31, 2023 |  | Properties |  | Equipment |  | Total
Cost | ​ | 1,725,162 | ​ | 13,542 | ​ | 1,738,704
Accumulated depreciation | ​ | (1,396,638) | ​ | (11,734) | ​ | (1,408,372)
Net book value | ​ | 328,524 | ​ | 1,808 | ​ | 330,332

​

For the year ended December 31, 2023, the Group recorded a depreciation charge of CHF 0.2 million (respectively CHF 0.2 million for 2022 and 2021) as part of research and development expenses and CHF 0.1 million (respectively CHF 0.1 million for 2022 and 2021) as part of general and administration expenses. The total cash outflows for the principal element of lease payment amounted to CHF 0.3 million for the years ended December 31, 2023 and 2022. The maturity analysis of lease liabilities is presented under note 3.2.

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Table of Contents

9. Property, plant and equipment

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Furniture & |  | Chemical |  | ​
Year ended December 31, 2022 | ​ | Equipment | ​ | fixtures | ​ | library | ​ | Total
Opening net book amount |  | 72,111 | ​ | — | ​ | — | ​ | 72,111
Additions |  | 581 | ​ | — | ​ | — | ​ | 581
Depreciation charge |  | (31,571) | ​ | — | ​ | — | ​ | (31,571)
Closing net book amount |  | 41,121 | ​ | — | ​ | — | ​ | 41,121
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Furniture & |  | Chemical |  | ​
As of December 31, 2022 | ​ | Equipment | ​ | fixtures | ​ | library | ​ | Total
Cost |  | 1,714,409 | ​ | 7,564 | ​ | 1,207,165 | ​ | 2,929,138
Accumulated depreciation |  | (1,673,288) | ​ | (7,564) | ​ | (1,207,165) | ​ | (2,888,017)
Net book value |  | 41,121 | ​ | — | ​ | — | ​ | 41,121
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Furniture & |  | Chemical |  | ​
Year ended December 31, 2023 | ​ | Equipment | ​ | fixtures | ​ | library | ​ | Total
Opening net book amount |  | 41,121 | ​ | — | ​ | — | ​ | 41,121
Additions |  | 6,842 | ​ | — | ​ | — | ​ | 6,842
Depreciation charge |  | (25,359) | ​ | — | ​ | — | ​ | (25,359)
Closing net book amount |  | 22,604 | ​ | — | ​ | — | ​ | 22,604
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Furniture & |  | Chemical |  | ​
As of December 31, 2023 | ​ | Equipment | ​ | fixtures | ​ | library | ​ | Total
Cost |  | 1,721,251 | ​ | 7,564 | ​ | 1,207,165 | ​ | 2,935,980
Accumulated depreciation |  | (1,698,647) | ​ | (7,564) | ​ | (1,207,165) | ​ | (2,913,376)
Net book value |  | 22,604 | ​ | — | ​ | — | ​ | 22,604

​

For the year ended December 31, 2023, the Group recorded a depreciation charge of CHF 22,572 (CHF 26,615 in 2022 and CHF 19,934 in 2021) as part of research and development expenses and CHF 2,787 (CHF 4,956 in 2022 and CHF 7,264 in 2021) as part of general and administration expenses.

10. Non-current financial assets

​

​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2023 | ​ | 2022
Security rental deposits. |  | 54,344 |  | 54,355
Total non‑current financial assets |  | 54,344 |  | 54,355

​

Security rental deposits relate to laboratory and office space. The applicable interest rate to such deposits is immaterial, and therefore, the value approximates amortized cost.

​

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Table of Contents

11. Payables and accruals

​

​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2023 | ​ | 2022
Trade payables |  | 984,384 | ​ | 1,276,546
Social security and other taxes |  | 164,609 | ​ | 120,875
Accrued expenses |  | 1,235,357 | ​ | 1,598,583
Total payables and accruals |  | 2,384,350 | ​ | 2,996,004

​

All payables mature within 3 months. Accrued expenses and trade payables primarily relate to R&D services from contract research organizations, consultants and professional fees. The total amount of payables and accruals decreased by CHF 0.6 million as of December 31, 2023 compared to December 31, 2022 mainly due to reduced clinical development activities. The carrying amounts of payables do not materially differ from their fair values, due to their short-term nature.

12. Deferred income

​

The Group expects the deferred income to be recognized as follows:

​

​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023 |  | December 31, 2022
Expected income recognition in year one after the balance sheet date |  | 234,978 |  | —
Expected income recognition in year two after the balance sheet date |  | 89,232 |  | —
Total deferred income |  | 324,210 |  | —

​

The deferred income relates to a grant from Eurostars/Innosuisse. See note 16 “other income” for further information related to the Eurostars/Innosuisse project.

​

​

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Table of Contents

13. Share capital

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number of shares
​ |  | Common |  | Treasury |  | ​
​ | ​ | shares | ​ | shares | ​ | Total
Balance as of January 1, 2022 |  | 49,272,952 |  | (11,374,803) |  | 37,898,149
Issue of shares - treasury shares | ​ | 48,636,476 | ​ | (48,636,476) | ​ | —
Issue of shares - exercise ESOP & ESC | ​ | 17,438,883 | ​ | — | ​ | 17,438,883
Sale of shares under shelf registration | ​ | — | ​ | 4,500,000 | ​ | 4,500,000
Exercise of pre-funded warrants | ​ | — | ​ | 15,978,570 | ​ | 15,978,570
Sale of shares under sale agency agreement |  | — |  | 1,355,248 |  | 1,355,248
Net purchase of shares under liquidity agreement |  | — |  | (36,830) |  | (36,830)
Balance as of December 31, 2022 |  | 115,348,311 |  | (38,214,291) |  | 77,134,020
Shares reclassed as treasury shares under IFRS 2 | ​ | — | ​ | (17,438,833) | ​ | (17,438,883)
Balance as of December 31, 2022 IFRS 2 | ​ | 115,348,311 | ​ | (55,653,174) | ​ | 59,695,137
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number of shares
​ | ​ | Common | ​ | Treasury | ​ | ​
​ | ​ | shares | ​ | shares | ​ | Total
Balance as of January 1, 2023. | ​ | 115,348,311 | ​ | (38,214,291) | ​ | 77,134,020
Issue of shares - treasury shares |  | 32,900,000 |  | (32,900,000) |  | —
Issue of shares - exercise ESOP | ​ | 12,527,235 | ​ | — | ​ | 12,527,235
Sale of shares under shelf registration | ​ | — | ​ | 7,999,998 | ​ | 7,999,998
Exercise of pre-funded warrants (1) | ​ | 23,578,950 | ​ | — | ​ | 23,578,950
Sale of shares under sale agency agreement | ​ | — | ​ | 4,006,373 | ​ | 4,006,373
Net purchase of shares under liquidity agreement | ​ | — | ​ | (43,872) | ​ | (43,872)
Acquisition of shares forfeited from DSPPP | ​ | — | ​ | (7,311) | ​ | (7,311)
Balance as of December 31, 2023 | ​ | 184,354,496 | ​ | (59,159,103) | ​ | 125,195,393
Shares reclassed as treasury shares under IFRS 2 | ​ | — | ​ | (29,958,807) | ​ | (29,958,807)
Balance as of December 31, 2023 IFRS 2 |  | 184,354,496 |  | (89,117,910) |  | 95,236,586

(1)In accordance with Swiss law, the issuance of 6,120,000 new shares through the exercise of pre-funded warrants from December 12, 2023 to December 31, 2023, have been registered in the commercial register on February 20, 2024. As of December 31, 2023, the amount of the share capital as registered in the commercial register is CHF 1,782,344.96 divided into 178,234,496 shares.

​

As of December 31, 2023, 125,195,393 shares were outstanding excluding 59,159,103 treasury shares directly held by Addex Pharma SA and including 29,958,807 outstanding shares benefiting from our DSPPP, considered as treasury shares under IFRS 2 (see note 14). All shares have a nominal value of CHF 0.01. As of December 31, 2022, 77,134,020 shares were outstanding excluding 38,214,291 treasury shares directly held by Addex Pharma SA and including 17,438,883 outstanding shares benefiting from our DSPPP, considered as treasury shares under IFRS 2. All shares had a nominal value of CHF 0.01 following the reduction of the nominal value effective on July 26, 2022.

The Group maintains a liquidity agreement with Kepler Cheuvreux (“Kepler”). Under the agreement, the Group has provided Kepler with cash and shares to enable them to buy and sell the Company’s shares. As of December 31, 2023, 172,072 (December 31,2022: 128,200) treasury shares are recorded under this agreement in the treasury share reserve and CHF 848 (December 31,2022: CHF 3,165) is recorded in other financial assets.

During the year 2023, the Group sold 4,006,373 treasury shares under the sale agency agreement with Kepler Cheuvreux at an average price of CHF 0.30 per share for gross proceeds of CHF 1,193,074 (during the year 2022, the Group sold 1,355,248 treasury shares at an average price of CHF 0.34 per share for gross proceeds of CHF 464,954).

​

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Table of Contents

On December 13, 2023, the company increased its capital from CHF 1,329,483 to CHF 1,782,345 by the issuance of 45,286,185 new registered shares at a nominal value of CHF 0.01 per share. Of these shares, 29,986,185 has been issued out of our conditional capital including 17,458,950 shares issued following the exercise of pre-funded warrants granted in the offering executed in April 2023 and 12,527,235 shares issued through the exercise of equity incentive units at a strike price of CHF 0.043 by Board Members, Executive Managers and employees on November 27, 2023. The payment of the strike price has been deferred under the Group’s staff retention deferred strike price payment plan (“DSPPP”) and consequently, under IFRS 2, the 12,527,235 shares issued from the exercise of equity incentive units are considered as treasury shares. The 12,527,235 shares are considered to be legally owned by the exercising equity incentive unit holders on November 27, 2023. The remaining 15,300,000 shares have been issued from the capital band of the company and fully subscribed by its 100% owned subsidiary Addex Pharma SA at the nominal value of CHF 0.01.

On October 23, 2023, the ADS ratio was changed from one ADS to six shares to a new ratio of one ADS to one hundred and twenty shares. The ADS ratio change had the same effect as a one to twenty ADS reverse split and except as otherwise indicated, all information in these consolidated financial statements gives retroactive effect to the ADS Ratio Change.

On June 14, 2023, the Company increased its capital from CHF 1,153,483 to CHF 1,329,483 through the issuance of 17,600,000 new shares from its capital band to its 100% owned subsidiary, Addex Pharma SA, at the nominal value of CHF 0.01. These shares are held as treasury shares; hence the operation does not impact the outstanding share capital.

On April 3, 2023, the Group entered into a securities purchase agreement with an institutional investor. The Group sold 7,999,998 treasury shares in the form of ADSs at a price of USD 0.16 (CHF 0.14) per share equivalent to USD 19.00 per ADS (CHF 17.20 per ADS) and 23,578,950 pre-funded warrant shares in the form of ADSs at a price of USD 0.16 (CHF 0.14 per share) equivalent to USD 18.80 (CHF 17.02) per ADS totally exercised as of December 31, 2023. As a consequence, 23,578,950 new shares have been issued from conditional capital of which 6,120,000 have been registered in the commercial register on February 20, 2024 in accordance with Swiss law. The total gross proceeds from the offering amounted to USD 5.0 million (CHF 4.5 million) and directly attributable share offering costs of CHF 0.2 million were recorded as a deduction in equity. In addition, the Group granted the institutional investor, 31,578,948 warrant shares exercisable in the form of ADSs with an exercise price of USD 0.17 (CHF 0.15) per share equivalent to USD 20.00 (CHF 18.11) per ADS and an exercise period expiring on April 5, 2028. The fair value of the warrant shares amounts to CHF 1.78 million and has been recorded in equity as a cost of the offering. The Group also reduced the price to USD 0.17 (CHF 0.15) per share equivalent to USD 20.00 (CHF 18.11) per ADS and extended the exercise period to April 5, 2028 of 9,230,772 warrant shares exercisable in the form of ADSs and 15,000,000 warrant shares exercisable in the form of ADSs granted in the securities purchase agreement signed on December 16, 2021 and July 22, 2022, respectively. Therefore, the institutional investor holds a total of 55,809,720 warrant shares exercisable in the form 465,081 warrant ADSs with an exercise price of USD 0.17 (CHF 0.15) per share equivalent to USD 20.00 (CHF 18.11) per ADS, expiring on April 5, 2028. Additionally, the amendments to the exercise conditions resulted in an increase in the total fair value of CHF 0.96 million that has been recorded in equity as a cost of the offering.

On December 15, 2022, the company increased its capital from CHF 979,094 to CHF 1,153,483 through the issuance of 17,438,883 new registered shares at a nominal value of CHF 0.01 per share from its conditional capital following the exercise of 17,438,883 equity incentive units at a strike price of CHF 0.13 by Board Members, Executive Managers and employees on October 26, 2022. The payment of the strike price has been deferred under the Group’s staff retention deferred strike price payment plan (“DSPPP”) and consequently, under IFRS 2, the 17,438,883 shares issued from the exercise of equity incentive units are considered as treasury shares. The 17,438,883 shares are considered to be legally owned by the exercising equity incentive unit holders on October 26, 2022. Of these shares, 7,311 have been forfeited as of December 31, 2023.

On October 31, 2022, the Group increased its capital from CHF 652,730 to CHF 979,094 through the issuance of 32,636,476 new registered shares from its authorized capital to its fully owned subsidiary, Addex Pharma SA, at CHF 0.01 per share. These shares are held as treasury shares, hence the operation does not impact the outstanding share capital.

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On July 22, 2022, the Group entered into a securities purchase agreement with an institutional investor and sold 4,500,000 treasury shares in the form of ADSs at a price of USD 0.28 (CHF 0.27 per share) equivalent to USD 34.00 (CHF 32.69) per ADS. In addition, 10,500,000 prefunded warrant shares in the form of ADSs were sold at a price of USD 0.28 (CHF 0.27) per share equivalent to USD 33.80 (CHF 32.50) per ADS. Of these pre-funded warrant shares 3,960,000 were exercised as of September 30, 2022 and 6,540,000 were exercised during the fourth quarter of 2022. The total gross proceeds from this offering amounted to USD 4.2 million (CHF 4.1 million). Additionally, all the 5,478,570 pre - funded warrant shares exercisable in the form of ADSs, sold to the same institutional investor in the securities purchase agreement signed on December 16, 2021, have been exercised during the third quarter of 2022.The Group additionally granted the institutional investor, 15,000,000 warrant shares exercisable in the form of ADSs with an exercise price of USD 0.32 (CHF 0.30) per share equivalent to USD 38.00 (CHF 36.54) per ADS and an exercise period of 5 years. Their fair value amounting to CHF 1.0 million has been recorded in equity as a cost of the offering.

On July 19, 2022, the nominal value of the issued, conditional and authorized share capital has been reduced from CHF 1.00 to CHF 0.01 effective on the SIX Swiss Exchange and Nasdaq stock market on July 26, 2022. As a consequence, the share capital was reduced to CHF 652,730. The decrease of CHF 64.6 million in share capital remains in equity and has been reclassed to other equity. The total number of issued, outstanding, conditional and authorized shares remained the same.

On February 2, 2022, the Company issued 16,000,000 new shares from the authorized capital to its 100% owned subsidiary, Addex Pharma SA, at CHF 1.00. These shares are held as treasury shares; hence the operation does not impact the outstanding share capital. Directly attributable share issuance costs of CHF 0.2 million were recorded as a deduction in equity.

14. Share-based compensation

The total share-based compensation expense recognized in the statement of comprehensive loss for equity incentive units granted to Board Members, Executive Managers, employees and consultants has been recorded under the following headings:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Research and development |  | 570,660 | ​ | 1,047,398 | ​ | 467,812
General and administration |  | 1,223,807 | ​ | 2,634,675 | ​ | 710,532
Total share-based compensation |  | 1,794,467 | ​ | 3,682,073 | ​ | 1,178,344

​

Analysis of share-based compensation by equity incentive plan is detailed as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Equity sharing certificate plan |  | — | ​ | 44,244 | ​ | 4,476
Share purchase plan |  | — | ​ | — | ​ | 23,498
Share option plans |  | 1,794,467 | ​ | 3,637,829 | ​ | 1,150,370
Total share-based compensation |  | 1,794,467 | ​ | 3,682,073 | ​ | 1,178,344

​

The share-based compensation expense decreased by CHF 1.9 million in 2023 compared to 2022 primarily due to higher expenses in 2022 in the fair value of equity incentive units following reductions in their strike price.

The share-based compensation expense increased by CHF 2.5 million in 2022 compared to 2021 primarily due to the increase in the fair value of equity incentive units (ESC and employee share options) following reductions in their strike price.

Equity Sharing Certificate Equity Incentive Plan

On June 1, 2010, the Company established an equity incentive plan based on equity sharing certificates (“ESCs”) to provide incentives to Board Members, Executive Managers, employees and consultants of the Group. Each ESC provides the holder (i) a right to subscribe for 1,000 shares in the Company, and (ii) a right to liquidation proceeds equivalent to that of shareholders. All rights of the ESCs expire after their defined exercise period with the ownership of the ESCs reverting to the Group. ESCs granted are subject to certain vesting conditions based on the service period defined in each grant agreement. The holder of vested ESCs has the right to subscribe to shares at the subscription price if the underlying share price has reached the floor price. The floor and subscription price are defined by the Board of Directors in each grant agreement at the time of issuance. In the event of a change in control, all ESCs are automatically vested. The Group has no legal or constructive obligation to repurchase or settle ESCs in cash.

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Movements in the number of share subscription rights attached to the ESCs outstanding are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Average | ​ | ​ | ​ | Average | ​ | ​
​ | ​ | subscription | ​ | ​ | ​ | subscription | ​ | ​
​ | ​ | prices / floor | ​ | ​ | ​ | prices / floor | ​ | ​
​ |  | prices (CHF) |  | 2022 |  | prices (CHF) |  | 2021
At January 1 |  | 1.54 |  | 198,750 | ​ | 1.54 | ​ | 198,750
Exercised under the DSPPP | ​ | 0.13 | ​ | (198,750) | ​ | — | ​ | —
At December 31 |  | — |  | — | ​ | 1.54 | ​ | 198,750

​

At December 31, 2023 and 2022, there are no subscription rights attached to the ESCs (2021: 198,750 were exercisable and outstanding).

Employee share option plans (ESOP)

The Company established an employee share option plan to provide incentives to directors, executives, employees and consultants of the Group.

During 2023, the Group granted the following options with vesting over 4 years and a 10-year exercise period at the grant date as described in the table below. Grant conditions relating to the strike price have been amended during the year ended December 31, 2023.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | ​ |  | Number of |  | ​
​ | ​ | ​ | ​ | ​ | ​ | Number of | ​ | share | ​ | Number of
​ | ​ | ​ | ​ | ​ | ​ | share | ​ | options repriced | ​ | options exercised
​ | ​ | Strike price at | ​ | Expiry date at | ​ | options | ​ | to CHF 0.043 on | ​ | under
​ | ​ | grant date | ​ | grant date | ​ | granted | ​ | November 27 2023 | ​ | the DSPPP
January 1, 2023 |  | 0.101 |  | Dec. 31, 2032 |  | 436,677 |  | — |  | —
May 12, 2023 |  | 0.13 |  | May 11, 2033 |  | 12,736,209 |  | 12,736,209 |  | 12,527,235
July 1, 2023 |  | 0.106 | ​ | June 30, 2033 |  | 147,695 |  | — |  | —
Total 2023 |  |  | ​ | ​ |  | 13,320,581 |  | 12,736,209 |  | 12,527,235

​

In 2023, the Group granted 13,320,581 share options of which 12,736,209 were repriced at a strike price of CHF 0.043 on November 27, 2023 and 12,527,235 have been exercised the same day under the DSPPP.

During 2022, the Group granted the following options with vesting over 4 years and a 10-year exercise period at the grant date as described in the table below. Grant conditions relating to the strike price have been amended during the year ended December 31, 2022.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Number of | ​ | Number of | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | share options | ​ | share options | ​ | Number of
​ | ​ | ​ | ​ | ​ | ​ | Number of | ​ | repriced to | ​ | repriced to | ​ | options exercised
​ | ​ | Strike price at | ​ | Expiry date at | ​ | share options | ​ | CHF 0.19 on | ​ | CHF 0.13 on | ​ | under
​ |  | grant date |  | grant date |  | granted |  | August 2 2022 |  | October 5 2022 |  | the DSPPP
April 12, 2022 | ​ | 1.00 | ​ | April 11, 2032 | ​ | 3,840,657 | ​ | 3,840,657 | ​ | 3,840,657 | ​ | 3,738,258
April 12, 2022 | ​ | 1.00 | ​ | Dec. 31, 2031 | ​ | 6,000 | ​ | 6,000 | ​ | 6,000 | ​ | 6,000
April 12, 2022 | ​ | 1.04 | ​ | Dec. 31, 2031 | ​ | 49,713 | ​ | — | ​ | — | ​ | —
May 2, 2022 | ​ | 1.00 | ​ | May 1, 2032 | ​ | 6,000 | ​ | 6,000 | ​ | 6,000 | ​ | 6,000
October 5, 2022 | ​ | 0.13 | ​ | Oct. 4, 2032 | ​ | 5,423,076 | ​ | — | ​ | — | ​ | 5,332,547
October 6, 2022 | ​ | 0.13 | ​ | Oct. 5, 2032 | ​ | 2,677 | ​ | — | ​ | — | ​ | 2,677
December 29, 2022 | ​ | 0.20 | ​ | June 30, 2032 | ​ | 108,955 | ​ | — | ​ | — | ​ | —
Total 2022 | ​ | ​ | ​ | ​ | ​ | 9,437,078 | ​ | 3,852,657 | ​ | 3,852,657 | ​ | 9,085,482

​

In 2022, the Group granted 9,437,078 share options of which 3,852,657 were repriced at a strike price of CHF 0.13 on October 5, 2022 and 9,085,482 have been exercised on October 26, 2022 under the DSPPP.

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Movements in the number of options outstanding are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Average | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average | ​ | ​
​ | ​ | strike price | ​ | ​ | ​ | strike price | ​ | ​ | ​ | strike price | ​ | ​
​ |  | (CHF) |  | 2023 |  | (CHF) |  | 2022 |  | (CHF) |  | 2021
At January 1 |  | 0.55 |  | 777,000 |  | 2.01 |  | 8,615,885 | ​ | 2.16 | ​ | 6,768,460
Exercised under the DSPPP | ​ | 0.043 | ​ | (12,527,235) | ​ | 0.13 | ​ | (17,240,133) | ​ | — | ​ | —
Granted |  | 0.13 |  | 13,320,581 |  | 0.49 |  | 9,437,078 | ​ | 1.46 | ​ | 1,868,900
Forfeited | ​ | — | ​ | — | ​ | 1.00 | ​ | (35,830) | ​ | 1.93 | ​ | (11,475)
Expired | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 2 | ​ | (10,000)
At December 31 |  | 0.32 |  | 1,570,346 |  | 0.55 |  | 777,000 | ​ | 2.01 | ​ | 8,615,885

​

At December 31, 2023, of the outstanding 1,570,346 share options (respectively 2022: 777,000 and 2021: 8,615,885), 686,605 were exercisable (respectively 2022: 389,668 and 2021: 5,954,115 ).

The outstanding share options as at December 31, 2023 and 2022 have the following expiry dates:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
At December 31, 2023 | ​ | Range of strike prices (CHF)
Expiry date |  | 0.043 to 0.106 |  | 0.13 |  | 0.14 to 0.99 |  | 1.00 to 3.00 |  | Total
2025 |  | — |  | — |  | 25,000 |  | 4,687 |  | 29,687
2027 |  | — |  | 56,655 |  | 11,385 |  | 7,241 |  | 75,281
2028 | ​ | — | ​ | 59,530 | ​ | 26,085 | ​ | 5,292 | ​ | 90,907
2029 |  | — |  | — |  | — |  | 110,500 |  | 110,500
2030 |  | — |  | 10,000 |  | — |  | 44,854 |  | 54,854
2031 | ​ | — | ​ | 40,000 | ​ | — | ​ | 73,888 | ​ | 113,888
2032 | ​ | 436,677 | ​ | 192,928 | ​ | 108,955 | ​ | — | ​ | 738,560
2033 | ​ | 356,669 | ​ | — | ​ | — | ​ | — | ​ | 356,669
Total |  | 793,346 |  | 359,113 |  | 171,425 |  | 246,462 |  | 1,570,346

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
At December 31, 2022 | ​ | Range of strike prices (CHF)
Expiry date |  | 0.13 |  | 0.14 to 0.99 |  | 1.00 to 3.00 |  | Total
2025 |  | — |  | 25,000 |  | 4,687 |  | 29,687
2027 |  | 56,655 |  | 11,385 |  | 7,241 |  | 75,281
2028 | ​ | 59,530 | ​ | 26,085 | ​ | 5,292 | ​ | 90,907
2029 | ​ | — | ​ | — | ​ | 110,500 | ​ | 110,500
2030 | ​ | 10,000 | ​ | — | ​ | 44,854 | ​ | 54,854
2031 | ​ | 40,000 | ​ | — | ​ | 73,888 | ​ | 113,888
2032 | ​ | 192,928 | ​ | 108,955 | ​ | — | ​ | 301,883
Total |  | 359,113 |  | 171,425 |  | 246,462 |  | 777,000

​

The weighted average fair value of share options granted during 2023 determined using a Black-Scholes model was CHF 0.08 (2022: CHF 0.18 and 2021: CHF 0.72). The significant inputs to the model were:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021 | ​
Weighted average share price per share at the grant date |  | CHF 0.14 |  | CHF 0.41 | ​ | CHF 1.58 | ​
Weighted average strike price per share |  | CHF 0.13 |  | CHF 0.49 | ​ | CHF 1.46 | ​
Weighted average volatility (1) |  | 58.16 | % | 50.34 | % | 47.07 | %
Weighted average expected option life (years) | ​ | 6.25 | ​ | 6.25 | ​ | 6.25 | ​
Dividend yield |  | — |  | — | ​ | — | ​
Weighted average annual risk-free rate |  | 0.86 | % | 0.75 | % | 0.44 | %

(1) The expected volatility is based on historical share prices of the company

​

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Deferred Strike Price Payment Plan (DSPPP)

The Group has implemented a staff retention plan which includes a DSPPP which encourages Board Members, Executive Managers and employees to exercise their share options or equity sharing certificates and become shareholders of the Company by allowing the deferral of the obligation to pay the strike price until the earlier of the sale of the shares or 10 years. Shares received through the exercise of unvested share options are subject to sales restrictions reflecting the remaining vesting period of exercised equity incentive units. In the event of a change of control, bankruptcy of the Company or forced sale of the shares at a price below the strike price, the deferred strike price payment obligation is waived. Under IFRS 2, the DSPPP is considered to be a non-recourse loan and consequently the options are deemed to be exercised on the date that the loan is repaid. Therefore, neither the shares nor the loan, are outstanding until either the options are exercised by paying the exercise price for the shares (repaying the loan) or the options expire entirely after 10 years without any remaining obligation from the option holders. The DSPPP is considered to be a modification of the equity incentive plan and consequently, the shares issued from the exercise of equity incentive units (“DSPPP Shares”) are recorded as treasury shares and associated share-based compensation is recognized over the remaining vesting period as if the equity incentive units had not been exercised. During the twelve - months period ending December 31, 2023, 12,527,235 options have been exercised through our DSPPP. The modification of the equity incentive plan decreased the fair value by CHF 12,323. This decrease has not been recognized according to IFRS 2. During the twelve - months period ending December 31, 2022, 17,438,883 options have been exercised through our DSPPP and the resulting modification of the equity incentive plan increased the fair value by CHF 63,399 of which CHF 52,216 has been recognized in 2022.

Movements in the number of DSPPP shares are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Average |  | ​ |  | Average |  | ​
​ | ​ | deferred strike | ​ | ​ | ​ | deferred strike | ​ | ​
​ | ​ | price payment | ​ | ​ | ​ | price payment | ​ | ​
​ | ​ | (CHF) | ​ | 2023 | ​ | (CHF) | ​ | 2022
At January 1 | ​ | 0.13 | ​ | 17,438,883 | ​ | — | ​ | —
Forfeited | ​ | 0.13 | ​ | (7,311) | ​ | — | ​ | —
Granted - exercise of ESOP & ESC | ​ | 0.043 | ​ | 12,527,235 | ​ | 0.13 | ​ | 17,438,883
At December 31 | ​ | 0.09 | ​ | 29,958,807 | ​ | 0.13 | ​ | 17,438,883

​

On November 27, 2023 and October 26, 2022, Board Members, Executive Managers and employees exercised 12,527,235 and 17,438,883 equity incentive units, respectively, at a strike price of CHF 0.043 and CHF 0.13, respectively. At December 31, 2023, of the 29,958,807 DSPPP shares (2022: 17,438,883 DSPPP shares), 12,573,975 (2022: 7,726,415) are not subject to sales restrictions.

The DSPPP will expire as follow:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
At December 31, 2023 |  | Range of strike prices (CHF)
Expiry date | ​ | 0.043 | ​ | 0.13 | ​ | Total
2032 |  | — |  | 17,431,572 |  | 17,431,572
2033 |  | 12,527,235 |  | — |  | 12,527,235
Total |  | 12,527,235 |  | 17,431,572 |  | 29,958,807

​

Share purchase plan

The Group established a share purchase plan under which services are settled for shares. Under the plan Board Members, Executive Managers, employees and consultants may receive fully paid ordinary shares from the Group’s treasury share reserve for services rendered. The Group established a share purchase plan under which services are settled for shares. Under the plan Board Members, Executive Managers, employees and consultants may receive fully paid ordinary shares from the Group’s treasury share reserve for services rendered. During the year ended December 31, 2023 and 2022, the Group did not use its treasury shares to pay consultants whilst during the year ended December 31, 2021, 116,914 shares were transferred to settle CHF 164,980 of consulting fees.

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15. Revenue from contract with customer

License & research agreement with Indivior PLC

On January 2, 2018, the Group entered into an agreement with Indivior for the discovery, development and commercialization of novel GABAB PAM compounds for the treatment of addiction and other CNS diseases. This agreement included the selected clinical candidate, ADX71441. In addition, Indivior agreed to fund a research program at the Group to discover novel GABAB PAM compounds.

The contract contains two distinct material promises and performance obligations: (1) the selected compound ADX71441 which falls within the definition of a licensed compound, whose rights of use and benefits thereon was transferred in January 2018 and, (2) the research services to be conducted by the Group and funded by Indivior to discover novel GABAB PAM compounds for clinical development that may be discovered over the research term of the agreement and selected by Indivior.

Indivior has sole responsibility, including funding liability, for development of selected compounds under the agreement through preclinical and clinical trials, as well as registration procedures and commercialization, if any, worldwide. Indivior has the right to design development programs for selected compounds under the agreement. Through the Group’s participation in a joint development committee, the Group reviews, in an advisory capacity, any development programs designed by Indivior. However, Indivior has authority over all aspects of the development of such selected compounds.

Under terms of the agreement, the Group granted Indivior an exclusive license to use relevant patents and know-how in relation to the development and commercialization of product candidates selected by Indivior. Subject to agreed conditions, the Group and Indivior jointly own all intellectual property rights that are jointly developed and the Group or Indivior individually own all intellectual property rights that the Group or Indivior develop individually. The Group has retained the right to select compounds from the research program for further development in areas outside the interest of Indivior including Charcot-Marie-Tooth type 1A neuropathy, or CMT1A, cough and pain. Under certain conditions, but subject to certain consequences, Indivior may terminate the agreement.

In January 2018, the Group received, under the terms of the agreement, a non-refundable upfront fee of USD 5.0 million for the right to use the clinical candidate, ADX71441, including all materials and know-how related to this clinical candidate. In addition, the Group is eligible for payments on successful achievement of pre-specified clinical, regulatory and commercial milestones totaling USD 330 million and royalties on net sales of mid-single digits to low double-digits.

On February 14, 2019, Indivior terminated the development of their selected compound, ADX71441. Separately, Indivior funds research at the Group, based on a research plan to be mutually agreed between the parties, to discover novel GABAB PAM compounds. These future novel GABAB PAM compounds, if selected by Indivior, become licensed compounds. The Group agreed with Indivior to an initial research term and duration of two years with a funding of $4 million over the period for the Group’s R&D costs incurred, that can be extended by twelve-month increments. R&D costs are calculated based on the costs incurred in accordance with the contract. Following Indivior’s selection of one newly identified compound, the Group has the right to also select one additional newly identified compound. The Group is responsible for the funding of all development and commercialization costs of its selected compounds and Indivior has no rights to the Group’s selected compounds. The initial two-year research term was expected to run from May 2018 to April 2020. In 2019, Indivior agreed to an additional research funding of USD 1.6 million, for the research period. On October 30, 2020, the research term was extended until June 30, 2021 and Indivior agreed to additional research funding of USD 2.8 million. Effective May 1, 2021, the research term was extended until July 31, 2022 and Indivior agreed additional research funding of CHF 3.7 million, of which CHF 2.7 million was paid to the Group and CHF 1.0 million paid directly by Indivior to third party suppliers that are supporting the funded research program. In August 2022, the research agreement was extended until March 31, 2023 and Indivior agreed to additional research funding of CHF 0.85 million. The reserved indications, where Addex retains exclusive rights to develop its own independent GABAB PAM program, have also been expanded to include cough. Effective November 1, 2022, the research term was extended until June 30, 2023 and Indivior agreed to additional research funding of CHF 0.95 million. Effective July 1, 2023, the research agreement with Indivior has been extended until June 30, 2024 and Indivior committed additional research funding of CHF 2.7 million including CHF 1.1 million expected to be paid to the Group and CHF 1.6 million paid directly by Indivior to third party suppliers that are supporting the funded research program.

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For the year ended December 31, 2023, the Group recognized CHF 1.6 million as revenue (2022: CHF 1.4 million and 2021: CHF 2.9 million) and recorded a combined amount of CHF 0.1 million in contract asset and trade receivable as of December 31, 2023 (December 31, 2022: CHF 0.4 million).

Janssen Pharmaceuticals Inc. (formerly Ortho-McNeil-Janssen Pharmaceuticals Inc.)

On December 31, 2004, the Group entered into a research collaboration and license agreement with Janssen Pharmaceuticals Inc. (JPI). In accordance with this agreement, JPI has acquired an exclusive worldwide license to develop mGlu2 PAM compounds for the treatment of human health. The Group is eligible to receive up to EUR 109 million in success-based development and regulatory milestone, and low double-digit royalties on net sales. The Group considers these various milestones to be variable considerations as they are contingent upon achieving uncertain, future development stages and net sales. For this reason, the Group considers the achievement of the various milestones as binary events that will be recognized as revenue upon occurrence.

No amounts have been recognized under this agreement in 2023, 2022 and 2021.

16. Other income

Under grant agreements with Eurostars/Innosuisse the Group is required to complete specific research activities within a defined period of time. The Group’s funding is fixed and received based on the satisfactory completion of the agreed research activities and incurring the related costs.

In July 2019, the Group was funded by Eurostars/Innosuisse for CHF 0.5 million to support our mGlu7 NAM program. Of the amount, CHF 0.38 million were received in October 2019. The remaining funds of CHF 0.12 million recorded as other receivables as of December 31, 2022, were received on February 2023. For the year ended December 31, 2023, the amount recognized in other income is nil (2022: nil and 2021: CHF 0.2 million).

In September 2023, the Group was funded by Eurostars/Innossuise for CHF 0.5 million to support our mGlu2 NAM program of which CHF 0.35 million were received in December 2023. As of December 31, 2023, the Group recognized CHF 0.03 million in other income in accordance with the grant conditions and CHF 0.32 million as deferred income, including CHF 0.23 million as short term (less than one year) and CHF 0.09 million as long term (more than one year) in accordance with the budget for the use of the grant received.

The Group additionally recognized other income from IT consultancy agreements.

17. Operating costs

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Staff costs (note 18) |  | 5,376,859 | ​ | 7,053,102 | ​ | 4,737,138
Depreciation (notes 8/9) |  | 305,952 | ​ | 323,144 | ​ | 347,613
External research and development costs |  | 2,748,422 | ​ | 10,029,786 | ​ | 9,014,083
Laboratory consumables |  | 331,279 | ​ | 319,305 | ​ | 295,377
Patent maintenance and registration costs |  | 370,132 | ​ | 318,194 | ​ | 266,043
Professional fees |  | 1,163,839 | ​ | 1,424,333 | ​ | 1,379,734
Short term leases | ​ | 35,567 | ​ | 47,283 | ​ | 37,512
D&O insurance | ​ | 628,595 | ​ | 1,591,231 | ​ | 1,591,882
Other operating costs |  | 967,723 | ​ | 858,788 | ​ | 989,840
Total operating costs |  | 11,928,368 | ​ | 21,965,166 | ​ | 18,659,222

​

The evolution of the total operating costs is mainly driven by external research and development expenses, staff costs, D&O insurance, professional fees and other operating costs.

During the year ended December 31, 2023, total operating costs decreased by CHF 10.0 million compared to the year ended December 31, 2022, primarily due to decreased dipraglurant related external research and development activities for CHF 7.3 million. During the same period, staff costs decreased by CHF 1.7 million primarily due to lower share-based service costs (note 18) and reduced D&O insurance for CHF 1.0 million.

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During the year ended December 31, 2022, total operating costs increased by CHF 3.3 million compared to the year ended December 31, 2021, primarily due to increased staff costs for CHF 2.3 million mainly due to higher share-based compensation costs. During the same period, the external research and development costs increased by CHF 1.0 million primarily due to dipraglurant clinical development activities for CHF 0.4 million and discovery activities for CHF 0.6 million.

18. Staff costs

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Wages and salaries |  | 3,241,641 |  | 3,341,014 | ​ | 3,268,209
Social charges and insurances |  | 378,454 |  | 397,428 | ​ | 407,944
Value of share-based services (note 14) |  | 1,520,917 |  | 3,034,740 | ​ | 946,632
Retirement benefit (note 20) |  | 235,847 |  | 279,920 | ​ | 114,353
Total staff costs |  | 5,376,859 |  | 7,053,102 | ​ | 4,737,138

​

Total staff costs decreased by CHF 1.7 million for the year ended December 31, 2023 compared to the year ended December 31, 2022, primarily due to lower share-based service costs in 2023 (see note 14).

Total staff costs increased by CHF 2.3 million for the year ended December 31, 2022, compared to the year ended December 31, 2021, primarily due to higher share-based service costs which include CHF 1.8 million for the increase in fair value of equity incentive units due to the reduction of their strike price (see note 14).

​

19. Taxes

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2023 |  | December 31, 2022 |  | December 31, 2021
Loss before tax |  | 10,556,227 |  | 20,804,213 |  | 15,351,914
Tax calculated at a tax rate of 13.99% |  | 1,476,816 |  | 2,910,509 |  | 2,147,733
Effect of different tax rates in USA and France |  | 1,658 |  | 3,801 |  | 5,398
Deductible expenses charged against equity for issuance of shares |  | 37,374 |  | 98,591 |  | 382,829
Sale of treasury shares by a subsidiary, recognized as financial loss (income) in standalone financial statements | ​ | 485,867 | ​ | 1,666,594 | ​ | (8,556)
Expenses not deductible for tax purposes |  | (321,494) |  | (434,593) |  | (145,195)
Temporary differences | ​ | (1,836) | ​ | (1,324) | ​ | (954)
Total tax losses not recognized as deferred tax asset |  | (1,678,385) |  | (4,243,578) |  | (2,381,255)
Income tax expense |  | — |  | — |  | —

​

The Group has decided not to recognize any deferred income tax assets at December 31, 2023, 2022 or 2021. The key factors which have influenced management in arriving at this evaluation are the fact that the Group has not yet a history of making profits and product development remains at an early stage.

The amount of deferred income tax assets that arises from sources other than tax losses carried forward and the amount of deferred income tax liabilities are insignificant compared to the unrecognized tax losses carried forward.

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The tax losses carried forward by the Group and their respective expiry dates are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2023 |  | December 31, 2022 |  | December 31, 2021
2022 |  | — |  | — |  | 3,540,541
2023 |  | — |  | 141,425,567 |  | 141,425,567
2024 |  | 290,949 |  | 290,949 |  | 290,949
2025 |  | 3,586,490 |  | 3,586,490 |  | 3,586,490
2026 |  | 23,467,840 |  | 23,467,840 |  | 23,467,840
2027 |  | 12,590,566 |  | 12,590,566 |  | 9,831,196
2028 | ​ | 28,427,419 | ​ | 28,427,419 | ​ | 24,391,568
2029 | ​ | 65,365,173 | ​ | 65,367,349 | ​ | —
2030 | ​ | 19,766,179 | ​ | — | ​ | —
Total unrecorded tax losses carry forwards. |  | 153,494,616 |  | 275,156,180 |  | 206,534,151

​

Tax losses carried forward expiring in 2027 and 2028, have been increased by CHF 2.8 million and CHF 4.0 million as of end of December 31, 2022 compared to December 31, 2021, respectively, due to final tax returns for the fiscal years ended December 31, 2020 and 2021 received from Swiss tax administration in 2022.

As of December 31, 2023, the unrecorded tax losses carried forward amounted to CHF 153,494,616 (2022: CHF 275,156,180, 2021 CHF 206,534,151).

20. Retirement benefit obligations

Apart from the social security plans fixed by the law, the Group sponsors an independent pension plan. The Group has contracted with Swiss Life for the provision of occupational benefits. All benefits in accordance with the regulations are reinsured in their entirety with Swiss Life within the framework of the corresponding contract. This pension solution fully reinsures the risks of disability, death and longevity with Swiss Life. Swiss Life invests the vested pension capital and provides a 100% capital and interest guarantee. The pension plan is entitled to an annual bonus from Swiss Life comprising the effective savings, risk and cost results. Although, as is the case with many Swiss pension plans, the amount of ultimate pension benefit is not defined, certain legal obligations of the plan create constructive obligations on the employer to pay further contributions to fund an eventual deficit; this results in the plan nevertheless being accounted for as a defined benefit plan. All employees are covered by this plan, which is a defined benefit plan. Retirement benefits are based on contributions, computed as a percentage of salary, adjusted for the age of the employee and shared approximately 46% / 54% by employee and employer. In addition to retirement benefits, the plans provide death and long-term disability benefits to its employees. Liabilities and assets are revised every year by an independent actuary. Assets are held in the insurance company. In accordance with IAS 19 (revised), plan assets have been estimated at fair market values and liabilities have been calculated according to the “projected unit credit” method. The Group recorded a pension benefit charge in 2023 of CHF 235,847 (respectively CHF 279,920 in 2022 and CHF 114,353 in 2021) as part of staff costs.

Employment benefit obligations

The amounts recognized in the balance sheet are determined as follows:

​

​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2023 |  | 2022
Defined benefit obligation |  | (9,138,045) |  | (7,682,529)
Fair value of plan assets |  | 8,694,521 |  | 7,867,835
Effect of asset ceiling | ​ | — | ​ | (185,306)
Funded status (shortfall)/ surplus |  | (443,524) |  | —

​

As of December 31, 2023, the funded status has a shortfall of CHF 0.4 million compared to a surplus of CHF 0.2 million as of December 31, 2022 not recorded as an asset in accordance with the asset ceiling rules and minimum funding requirements. The increase of the present value of the defined benefit obligation is primarily due to the decrease of the discount rate to 1.50% as of December 31, 2023 compared to 2.30% as of December 31, 2022.

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The amounts recognized in the statement of comprehensive loss are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Current service cost |  | (268,097) | ​ | (306,491) |  | (325,144)
Past service cost | ​ | 26,899 | ​ | 36,459 | ​ | 219,104
Interest cost |  | (175,609) | ​ | (98,639) |  | (23,742)
Interest income |  | 180,960 | ​ | 88,751 |  | 15,429
Company pension amount (note 18) |  | (235,847) | ​ | (279,920) |  | (114,353)

​

The conversion rates have changed in the first quarter of 2023, second quarter of 2022 and first quarter of 2021 which has led to a positive past service cost during the years ended December 31, 2023 (respectively 2022 and 2021).

The movements in the defined benefit obligations during the year are as follows:

​

​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022
Defined benefit obligation at beginning of year |  | (7,682,529) |  | (9,276,675)
Current service cost |  | (268,097) |  | (306,491)
Past service cost |  | 26,899 |  | 36,459
Interest cost | ​ | (171,347) | ​ | (98,639)
Employee contributions |  | (250,290) |  | (244,097)
Actuarial (loss)/ gain arising from changes in financial assumptions |  | (671,909) |  | 1,923,273
Actuarial gain arising from changes in demographic assumptions |  | — |  | 51,085
Actuarial gain on experience adjustment |  | 22,250 |  | 6,850
Benefits (paid)/ deposited |  | (143,022) |  | 225,706
Defined benefit obligations at end of year |  | (9,138,045) |  | (7,682,529)

​

The movements in the fair value of plan assets during the year are as follows:

​

​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022
Fair value of plan assets at beginning of year |  | 7,867,835 |  | 7,995,150
Interest income |  | 180,960 |  | 88,751
Employee contributions |  | 250,290 |  | 244,097
Employer contributions |  | 298,490 |  | 291,313
Plan assets loss |  | (46,076) |  | (525,770)
Benefits paid |  | 143,022 |  | (225,706)
Fair value of plan assets at end of year |  | 8,694,521 |  | 7,867,835

​

As of the date of the preparation of these consolidated financial statements, the 2023 annual report of the pension fund has not yet been issued, and therefore the detailed structures and assets held at December 31, 2023, are not currently available for presentation. However, the detailed assets held at December 31, 2022, which were reported to the Group on May 9, 2023 by its plan administrator, are as follows:

​

​ | ​ | ​ | ​
​ |  | December 31, |
​ | ​ | 2022 |
Cash |  | 0.6 | %
Bonds |  | 49.74 | %
Equity instruments |  | 11.45 | %
Real estate |  | 23.72 | %
Mortgages |  | 10.47 | %
Derivatives | ​ | 4.02 | %
Total |  | 100.00 | %

​

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The principal actuarial assumptions used were as follows:

​

​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2023 |  | December 31, 2022 |
Discount rate |  | 1.50 | % | 2.30 | %
Mortality tables |  | BVG2020 GT |  | BVG2020 GT | ​
Salary growth rate | ​ | 1.20 | % | 1.20 | %
Pension growth rate | ​ | 0.00 | % | 0.00 | %

​

The following sensitivity analysis shows the impact of increasing or decreasing certain assumptions on the defined benefit obligation of the Swiss pension plan:

-0.25% increase or decrease in the discount rate would lead to a decrease of 3.23% (2022: 3.09)% or an increase of 3.66% (2022: 3.48)% in the defined benefit obligation.

- | 0.25% increase or decrease in the interest rate on retirement savings capital would lead to an increase of 0.76% (2022: 1.06)% or a decrease of 0.74% (2022: 1.03)% in the defined benefit obligation.

- | 0.25% increase or decrease in salaries would lead to an increase of 0.08% (2022: 0.09)% or a decrease of 0.07% (2022: 0.09)% in the defined benefit obligation; and

- | +/-1 year in the life expectancy would lead to an increase of 1.23% (2022: 1.02)% or a decrease of 1.28% (2022: 1.07)% in the defined benefit obligation.

The discount rate and life expectancy were identified as significant actuarial assumptions for the Swiss pension plan.

​

The above sensitivity analyses are based on a change in an assumption while holding all other assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. When calculating the sensitivity of the defined benefit obligations to significant actuarial assumptions the same method (present value of the defined benefit obligation calculated with the projected unit credit method at the end of the reporting period) has been applied as that used in calculating the pension liability recorded on consolidated balance sheets.

The methods and types of assumptions used in preparing the sensitivity analysis did not change compared to the prior period.

The estimated employer contributions to pension plans for the financial year 2024 amount to CHF 297,000. The following table shows the funding of the defined benefit pensions and the components of the costs recognized in other comprehensive income:

​

​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022
Present value of defined benefit obligation |  | (9,138,045) |  | (7,682,529)
Fair value of plan assets |  | 8,694,521 |  | 7,867,835
Effect of asset ceiling | ​ | — | ​ | (185,306)
(Deficit) / Surplus in the plan |  | (443,524) |  | —
Actuarial (loss)/ gain on defined benefit obligation | ​ | (649,659) | ​ | 1,981,208
Actuarial loss on plan assets | ​ | (46,076) | ​ | (525,770)
Change in the effect of the asset ceiling | ​ | 189,568 | ​ | (185,306)
Total |  | (506,167) |  | 1,270,132

​

The following table shows the estimated benefit payments for the next ten years where the number of employees remains constant:

​

​ | ​ | ​
2024 |  | 790,000
2025 |  | 523,000
2026 |  | 372,000
2027 |  | 371,000
2028 | ​ | 538,000
2029-2033 |  | 2,697,000

​

​

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21. Finance result, net

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Interest income |  | 63,964 |  | 29,251 | ​ | 5,322
Interest expense on leases | ​ | (19,963) | ​ | (23,019) | ​ | (23,866)
Interest cost | ​ | (1,644) | ​ | (25,878) | ​ | (39,146)
Foreign exchange (losses)/gains, net |  | (317,285) |  | (264,360) | ​ | 211,693
Finance result, net |  | (274,928) |  | (284,006) | ​ | 154,003

​

The evolution of the finance result is mainly driven by foreign exchange losses on our U.S Dollar cash deposits due to the evolution of the exchange rate of U.S Dollar compared to the Swiss franc. Finance result was a net loss of CHF 0.3 million for the years ended December 31, 2023 and December 31, 2022, whilst it was a net gain of CHF 0.2 million for the year ended December 31, 2021.

​

22. Loss per share

Basic and diluted loss per share is calculated by dividing the loss attributable to equity holders of the Company by the weighted average number of shares in issue during the year excluding treasury shares.

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Loss attributable to equity holders of the Company |  | (10,556,227) |  | (20,804,213) | ​ | (15,351,914)
Weighted average number of shares in issue |  | 74,307,635 |  | 45,184,865 | ​ | 34,119,666
Basic and diluted loss per share |  | (0.14) |  | (0.46) | ​ | (0.45)

​

The Company has four categories of dilutive potential shares: treasury shares, equity sharing certificates (“ESCs”), share options and warrants which have been ignored in the calculation of the loss per share for the year ended December 31, 2023, 2022 and 2021, as they would be antidilutive.

In addition to treasury shares, the total number of dilutive instruments as of December 31, 2023 is 63,246,964 (2022: 30,874,670 and 2021: 29,590,875) which consists of 1,570,346 share options, 5,866,898 warrants granted to investors on March 28, 2018 and 55,809,720 warrants granted to one investor (9,230,772 warrants on December 21, 2021, 15,000,000 on July 26, 2022 and 31,578,948 on April 3, 2023, respectively). As of December 31, 2022, dilutive instruments consist of 777,000 share options, 5,866,898 warrants granted to investors on March 28,2018 and 24,230,772 warrants granted to one investor (9,230,772 warrants on December 21, 2021 and 15,000,000 on July 26, 2022, respectively). As of December 31, 2021, dilutive instruments primarily consist of 198,750 ESCs, 8,615,885 share options, 5,866,898 warrants granted to investors on March 28, 2018, 9,230,772 warrants and 5,478,570 pre-funded warrants granted to one investor on December 21, 2021. These options could potentially dilute basic earnings per share in the future.

23. Commitments and contingencies

Capital commitments

As at December 31, 2023 and 2022, the Group has no contracted capital expenditure.

Contingencies

As part of the ordinary course of business, the Group is subject to contingent liabilities in respect of certain litigation. Currently, there is no outstanding litigation with a possible negative effect on the Group.

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24. Related party transactions

Related parties include members of the Board of Directors and the Executive Management of the Group. The following transactions were carried out with related parties:

Key management compensation

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
Salaries, other short‑term employee benefits and post-employment benefits |  | 1,644,065 |  | 1,619,186 | ​ | 1,502,377
Consulting fees |  | 17,106 |  | 151,639 | ​ | 224,091
Share‑based compensation |  | 1,536,897 |  | 3,196,353 | ​ | 955,051
Total |  | 3,198,068 |  | 4,967,178 | ​ | 2,681,519

​

Salaries, other short-term employee benefits and post-employment benefits relate to members of the Board of Directors and Executive Management who are employed by the Group. Consulting fees relate mainly to Roger Mills, a member of the Executive Management who delivers his services to the Group under a consulting contract. The Group has a net payable to the Board of Directors and Executive Management of CHF 0.1 million as of December 31, 2023 and December 31, 2022. Share-based compensation relates to the fair value of equity incentive units recognized through profit and loss following their vesting plan.

25. Events after the balance sheet date

On January 8, 2024, 6,439,124 equity incentive units giving the right to purchase 6,439,124 shares listed on SIX, have been granted to Board members, Executive Managers and employees with an exercise price of CHF 0.05 and the related share-based compensation amount of CHF 0.2 million will be recognized over the remaining vesting period of the equity incentive units.

The Group sold 3,050,665 treasury shares for a gross amount of CHF 0.2 million under the sale agency agreement with Kepler Cheuvreux, between the closing date and the approval of these consolidated financial statements.

On April 2, 2024, the Group announced the divestment of its allosteric modulator drug discovery technology platform and a portfolio of preclinical programs to a newly formed Swiss company, Neurosterix Pharma Sàrl (Neurosterix). Neurosterix has received committed funding of USD 63 million from a syndicate of investors led by Perceptive Advisors (Perceptive Xontogeny Venture Fund II L.P, Perceptive Life Sciences Master Fund Ltd and Acorn Bioventures 2, L.P) (the “Neurosterix Transaction” or “Transaction”). As part of the Transaction, Addex received CHF 5.0 million in cash and an equity interest representing 20% of Neurosterix. Addex retained its partnerships with Janssen Pharmaceuticals, Inc. and Indivior PLC, as well as unpartnered clinical stage assets including dipraglurant for Parkinson’s disease and post-stroke/TBI recovery and its preclinical GABAB PAM program for chronic cough. The Transaction includes the transfer of the associated R&D staff and infrastructure. As part of the Transaction, Addex and Neurosterix entered into a service agreement which provides Addex with access to certain staff and infrastructure to ensure the operation of the Addex retained business.

At the effective date of the Transaction of March 1, 2024, Addex transferred to Neurosterix certain assets and liabilities identified as held for sale as of February 29, 2024 amounting to CHF 0.6 million and CHF 0.5 million, respectively. These assets and liabilities mainly related to the Eurostars/Innosuisse grant funding to support the mGlu2NAM program recorded as deferred income for CHF 0.3 million as of February 29, 2024.

​

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