10-Q 1 c716-20130930x10q.htm 10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2013

OR

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

For the transition period from _______________ to _______________.

COMMISSION FILE NUMBER: 000-19271

IDEXX LABORATORIES, INC.

(Exact name of registrant as specified in its charter)

DELAWARE | 01-0393723
(State or other jurisdiction of incorporation or organization) | (IRS Employer Identification No.)
ONE IDEXX DRIVE, WESTBROOK, MAINE | 04092
(Address of principal executive offices) | (ZIP Code)
207-556-0300
(Registrant’s telephone number, including area code)

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 x No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files). Yes x No o

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

Large accelerated filer | x |  | Accelerated filer | o
Non-accelerated filer | o | (Do not check if a smaller reporting company) | Smaller reporting company | o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date. The number of shares outstanding of the registrant’s Common Stock, $0.10 par value, was 51,894,238 on October 11, 2013.

IDEXX LABORATORIES, INC.

Quarterly Report on Form 10-Q

Table of Contents

Item No. |  | Page
| PART I—FINANCIAL INFORMATIO N |
Item 1. | Financial Statements (unaudited) |
| Condensed Co nsolidated Balance Sheets as of September 30, 2013 and December 31, 20 12 | 3
| Condensed Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 20 13 and 20 12 | 4
| Condensed Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2013 and 2012 | 5
| Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2013 and 2012 | 6
| Notes to Condensed Consolidated Financial Statements | 7
Item 2. | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 19
Item 3. | Quantitative and Qualitative Disclosures About Market Risk | 34
Item 4. | Controls and Procedures | 34
| PART II—OTHER INFORMATION |
Item 1. | Legal Proceedings | 34
Item 1A. | Risk Factors | 35
Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds | 42
Item 5. | Other Information | 43
Item 6. | Exhibits | 44
Signatures |  | 45
Exhibit Index |  |

PART I— FINANCIAL INFORMATION

Item 1. Financial Statements.

IDEXX LABORATORIES, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share amounts)

(Unaudited)

| September 30, |  | December 31, |
| 2013 |  | 2012 |
ASSETS |  |  |  |  |  |
Current Assets: |  |  |  |  |  |
Cash and cash equivalents | $ | 264,811 |  | $ | 223,986 |
Accounts receivable, net of reserves of $3,324 in 2013 and $2,632 in 2012 |  | 151,568 |  |  | 138,324 |
Inventories |  | 145,987 |  |  | 140,946 |
Deferred income tax assets |  | 27,304 |  |  | 27,714 |
Other current assets |  | 35,553 |  |  | 38,567 |
Total current assets |  | 625,223 |  |  | 569,537 |
Long-Term Assets: |  |  |  |  |  |
Property and equipment, net |  | 274,158 |  |  | 245,177 |
Goodwill |  | 180,988 |  |  | 174,994 |
Intangible assets, net |  | 61,387 |  |  | 62,833 |
Other long-term assets, net |  | 53,482 |  |  | 51,061 |
Total long-term assets |  | 570,015 |  |  | 534,065 |
TOTAL ASSETS | $ | 1,195,238 |  | $ | 1,103,602 |
LIABILITIES AND STOCKHOLDERS’ EQUITY |  |  |  |  |  |
Current Liabilities: |  |  |  |  |  |
Accounts payable | $ | 38,131 |  | $ | 35,288 |
Accrued liabilities |  | 134,161 |  |  | 137,746 |
Line of credit |  | 397,200 |  |  | 212,000 |
Current portion of long-term debt |  | 1,019 |  |  | 1,107 |
Current portion of deferred revenue |  | 22,441 |  |  | 20,192 |
Total current liabilities |  | 592,952 |  |  | 406,333 |
Long-Term Liabilities: |  |  |  |  |  |
Deferred income tax liabilities |  | 22,863 |  |  | 23,028 |
Long-term debt, net of current portion |  | 624 |  |  | 1,394 |
Long-term deferred revenue, net of current portion |  | 15,129 |  |  | 12,692 |
Other long-term liabilities |  | 28,775 |  |  | 23,898 |
Total long-term liabilities |  | 67,391 |  |  | 61,012 |
Total liabilities |  | 660,343 |  |  | 467,345 |
Commitments and Contingencies (Note 15) |  |  |  |  |  |
Stockholders’ Equity: |  |  |  |  |  |
Common stock, $0.10 par value: Authorized: 120,000 shares; Issued: 100,805 and 100,160 shares in 2013 and 2012, respectively |  | 10,081 |  |  | 10,016 |
Additional paid-in capital |  | 798,332 |  |  | 757,214 |
Deferred stock units: Outstanding: 122 and 119 units in 2013 and 2012, respectively |  | 5,055 |  |  | 4,630 |
Retained earnings |  | 1,450,135 |  |  | 1,305,593 |
Accumulated other comprehensive income |  | 15,562 |  |  | 15,954 |
Treasury stock, at cost: 48,835 and 45,652 shares in 2013 and 2012, respectively |  | (1,744,319) |  |  | (1,457,184) |
Total IDEXX Laboratories, Inc. stockholders’ equity |  | 534,846 |  |  | 636,223 |
Noncontrolling interest |  | 49 |  |  | 34 |
Total stockholders’ equity |  | 534,895 |  |  | 636,257 |
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY | $ | 1,195,238 |  | $ | 1,103,602 |
The accompanying notes are an integral part of these condensed consolidated financial statements.

3

IDEXX LABORATORIES, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share amounts)

(Unaudited)

|  | For the Three Months Ended |  |  | For the Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  |  | 2013 |  |  | 2012 |  |  |  | 2013 |  |  | 2012 |
Revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product revenue |  | $ | 206,693 |  | $ | 196,900 |  |  | $ | 629,782 |  | $ | 613,288 |
Service revenue |  |  | 131,604 |  |  | 118,575 |  |  |  | 393,203 |  |  | 360,512 |
Total revenue |  |  | 338,297 |  |  | 315,475 |  |  |  | 1,022,985 |  |  | 973,800 |
Cost of Revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of product revenue |  |  | 76,521 |  |  | 72,738 |  |  |  | 230,514 |  |  | 226,420 |
Cost of service revenue |  |  | 75,993 |  |  | 72,102 |  |  |  | 225,018 |  |  | 217,282 |
Total cost of revenue |  |  | 152,514 |  |  | 144,840 |  |  |  | 455,532 |  |  | 443,702 |
Gross profit |  |  | 185,783 |  |  | 170,635 |  |  |  | 567,453 |  |  | 530,098 |
Expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales and marketing |  |  | 60,079 |  |  | 52,067 |  |  |  | 179,641 |  |  | 164,238 |
General and administrative |  |  | 38,651 |  |  | 35,307 |  |  |  | 116,871 |  |  | 105,760 |
Research and development |  |  | 21,568 |  |  | 20,349 |  |  |  | 65,507 |  |  | 60,964 |
Income from operations |  |  | 65,485 |  |  | 62,912 |  |  |  | 205,434 |  |  | 199,136 |
Interest expense |  |  | (1,463) |  |  | (873) |  |  |  | (3,477) |  |  | (2,992) |
Interest income |  |  | 456 |  |  | 473 |  |  |  | 1,345 |  |  | 1,389 |
Income before provision for income taxes |  |  | 64,478 |  |  | 62,512 |  |  |  | 203,302 |  |  | 197,533 |
Provision for income taxes |  |  | 18,786 |  |  | 19,639 |  |  |  | 58,745 |  |  | 62,606 |
Net income |  |  | 45,692 |  |  | 42,873 |  |  |  | 144,557 |  |  | 134,927 |
Less: Net income attributable to noncontrolling interest |  |  | 4 |  |  | 20 |  |  |  | 15 |  |  | 14 |
Net income attributable to IDEXX Laboratories, Inc. stockholders |  | $ | 45,688 |  | $ | 42,853 |  |  | $ | 144,542 |  | $ | 134,913 |
Earnings per Share: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.87 |  | $ | 0.78 |  |  | $ | 2.70 |  | $ | 2.45 |
Diluted |  | $ | 0.86 |  | $ | 0.76 |  |  | $ | 2.66 |  | $ | 2.40 |
Weighted Average Shares Outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 52,450 |  |  | 54,938 |  |  |  | 53,562 |  |  | 55,074 |
Diluted |  |  | 53,242 |  |  | 56,088 |  |  |  | 54,391 |  |  | 56,270 |
The accompanying notes are an integral part of these condensed consolidated financial statements. |

4

IDEXX LABORATORIES, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

(Unaudited)

|  | For the Three Months Ended |  |  | For the Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  |  | 2013 |  |  |  | 2012 |  |  |  | 2013 |  |  |  | 2012 |
Net income |  | $ | 45,692 |  |  | $ | 42,873 |  |  | $ | 144,557 |  |  | $ | 134,927 |
Other comprehensive income, net of tax: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments |  |  | 9,418 |  |  |  | 9,221 |  |  |  | (2,115) |  |  |  | 4,548 |
Unrealized gain on investments, net of tax expense of $51 and $84 in 2013 and $33 and $66 in 2012 |  |  | 86 |  |  |  | 56 |  |  |  | 142 |  |  |  | 111 |
Unrealized (loss) gain on derivative instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized (loss) gain, net of tax (benefit) expense of ($1,512) and $1,278 in 2013 and ($1,294) and ($1,235) in 2012 |  |  | (3,601) |  |  |  | (2,684) |  |  |  | 3,066 |  |  |  | (2,329) |
Less: reclassification adjustment for gains included in net income, net of tax expense of $329 and $542 in 2013 and $395 and $1,434 in 2012 |  |  | (834) |  |  |  | (872) |  |  |  | (1,485) |  |  |  | (3,194) |
Unrealized (loss) gain on derivative instruments |  |  | (4,435) |  |  |  | (3,556) |  |  |  | 1,581 |  |  |  | (5,523) |
Other comprehensive income (loss), net of tax |  |  | 5,069 |  |  |  | 5,721 |  |  |  | (392) |  |  |  | (864) |
Comprehensive income |  |  | 50,761 |  |  |  | 48,594 |  |  |  | 144,165 |  |  |  | 134,063 |
Less: comprehensive income attributable to noncontrolling interest |  |  | 4 |  |  |  | 20 |  |  |  | 15 |  |  |  | 14 |
Comprehensive income attributable to IDEXX Laboratories, Inc. |  | $ | 50,757 |  |  | $ | 48,574 |  |  | $ | 144,150 |  |  | $ | 134,049 |
The accompanying notes are an integral part of these condensed consolidated financial statements. |

5

IDEXX LABORATORIES, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(Unaudited)

|  | For the Nine Months Ended |
|  | September 30, |
|  |  | 2013 |  |  |  | 2012 |
Cash Flows from Operating Activities: |  |  |  |  |  |  |  |
Net income |  | $ | 144,557 |  |  | $ | 134,927 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |
Depreciation and amortization |  |  | 41,130 |  |  |  | 38,490 |
Loss on disposal of property and equipment |  |  | 220 |  |  |  | 194 |
Increase in deferred compensation liability |  |  | 226 |  |  |  | 176 |
Provision for uncollectible accounts |  |  | 1,226 |  |  |  | 837 |
Benefit from deferred income taxes |  |  | (984) |  |  |  | (1,861) |
Share-based compensation expense |  |  | 12,265 |  |  |  | 11,684 |
Tax benefit from share-based compensation arrangements |  |  | (7,438) |  |  |  | (10,182) |
Changes in assets and liabilities: |  |  |  |  |  |  |  |
Accounts receivable |  |  | (12,795) |  |  |  | 255 |
Inventories |  |  | (6,360) |  |  |  | (18,078) |
Other assets |  |  | 4,717 |  |  |  | 539 |
Accounts payable |  |  | 2,184 |  |  |  | (4,893) |
Accrued liabilities |  |  | (3,269) |  |  |  | (3,751) |
Deferred revenue |  |  | 4,050 |  |  |  | 5,151 |
Net cash provided by operating activities |  |  | 179,729 |  |  |  | 153,488 |
Cash Flows from Investing Activities: |  |  |  |  |  |  |  |
Purchases of property and equipment |  |  | (60,607) |  |  |  | (43,230) |
Proceeds from disposition of pharmaceutical product lines |  |  | 3,500 |  |  |  | 3,000 |
Proceeds from sale of property and equipment |  |  | - |  |  |  | 45 |
Acquisition of intangible assets |  |  | (1,024) |  |  |  | (900) |
Acquisition of a business, net of cash acquired |  |  | (10,101) |  |  |  | - |
Net cash used by investing activities |  |  | (68,232) |  |  |  | (41,085) |
Cash Flows from Financing Activities: |  |  |  |  |  |  |  |
Borrowings (payments) on revolving credit facilities, net |  |  | 185,200 |  |  |  | (11,000) |
Payment of notes payable |  |  | (858) |  |  |  | (682) |
Repurchases of common stock |  |  | (282,910) |  |  |  | (91,152) |
Proceeds from exercises of stock options and employee stock purchase plans |  |  | 21,734 |  |  |  | 17,156 |
Tax benefit from share-based compensation arrangements |  |  | 7,438 |  |  |  | 10,182 |
Net cash used by financing activities |  |  | (69,396) |  |  |  | (75,496) |
Net effect of changes in exchange rates on cash |  |  | (1,276) |  |  |  | 639 |
Net increase in cash and cash equivalents |  |  | 40,825 |  |  |  | 37,546 |
Cash and cash equivalents at beginning of period |  |  | 223,986 |  |  |  | 183,895 |
Cash and cash equivalents at end of period |  | $ | 264,811 |  |  | $ | 221,441 |
The accompanying notes are an integral part of these condensed consolidated financial statements. |

2

6

IDEXX LABORATORIES, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

NOTE 1. BASIS OF PRESENTATION AND PRINCIPLES OF CONSOLIDATION

The accompanying condensed consolidated financial statements of IDEXX Laboratories, Inc. have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the requirements of Regulation S-X, Rule 10-01 for financial statements required to be filed as a part of Form 10-Q.

The accompanying condensed consolidated financial statements include the accounts of IDEXX Laboratories, Inc. and our wholly-owned and majority-owned subsidiaries (“IDEXX,” the “Company,” “we” or “our”). We do not have any variable interest entities for which we are the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation.

The accompanying condensed consolidated financial statements reflect, in the opinion of our management, all adjustments necessary for a fair statement of our financial position and results of operations. All such adjustments are of a recurring nature. The consolidated balance sheet data at December 31, 2012 was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. The results of operations for the three and nine months ended September 30, 2013 are not necessarily indicative of the results to be expected for the full year or any future period. These condensed consolidated financial statements should be read in conjunction with this Quarterly Report on Form 10-Q for the quarter ended September 30, 2013 and our Annual Report on Form 10-K for the year ended December 31, 2012 filed with the Securities and Exchange Commission.

Certain reclassifications have been made to the prior year condensed consolidated financial statements to conform to the current year presentation. Reclassifications had no material impact on previously reported results of operations, financial position or cash flows.

Note 2. ACCOUNTING POLICIES

Significant Accounting Policies

The significant accounting policies used in preparation of these condensed consolidated financial statements for the three and nine months ended September 30, 2013 are consistent with those discussed in Note 2 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2012.

New Accounting Pronouncements Adopted

In December 2011, the Financial Accounting Standards Board (“FASB”) issued an amendment to the accounting guidance for disclosure of offsetting assets and liabilities and related arrangements. The amendment expands the disclosure requirements so that entities are now required to disclose both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. The amendment is effective for fiscal years, and interim periods within those years, beginning on or after January 1, 2013, and shall be applied retrospectively. The adoption of this accounting pronouncement did not have a material impact on our financial statement disclosures. See Note 1 8 for additional information regarding derivative instruments subject to master netting arrangements.

7

In February 2013, the FASB issued an amendment to the accounting guidance for the reporting of amounts reclassified out of accumulated other comprehensive income (“AOCI”). The amendment expands the existing disclosure by requiring entities to present information about significant items reclassified out of AOCI by component. In addition, an entity is required to provide information about the effects on net income of significant amounts reclassified out of each component of AOCI to net income either on the face of the statement where net income is presented or as a separate disclosure in the notes of the financial statements. The amendment is effective prospectively for annual or interim reporting periods beginning after December 15, 2012. The adoption of this accounting pronouncement did not have a material impact on our financial statement disclosures. See Note 1 3 for additional information regarding AOCI.

NOTE 3. SHARE-BASED COMPENSATION

The fair value of options, restricted stock units, deferred stock units and employee stock purchase rights awarded during the three and nine months ended September 30, 2013 tota led $0.3 million and $18.9 million, respectively, compared to $1.1 million and $17.9 million for the three and nine months ended September 30, 2012, respectively. T he total unrecognized compensation expense, net of estimated forfeitures, for unvested share-based compensation awards out standing at September 30, 2013 was $36.2 million, which will be recognized over a weighted average period of approximately 1.8 years.

We determine the assumptions used in the valuation of option awards as of the date of grant. Differences in the stock price volatility, expected term or risk-free interest rate may necessitate distinct valuation assumptions at each grant date. As such, we may use different assumptions for options granted throughout the year. Option awards are granted with an exercise price equal to the closing market price of our common stock at the date of grant. We have never paid any cash dividends on our common stock and we have no present intention to pay a dividend; therefore, we assume that no dividends will be paid over the expected terms of option awards. The weighted averages of the valuation assumptions used to determine the fair value of each option award on the date of grant and the weighted average estimated fair values were as follows:

|  | For the Nine Months Ended
|  | September 30,
|  |  | 2013 |  |  | 2012 |
Expected stock price volatility |  |  | 33 | % |  | 34 | %
Expected term, in years |  |  | 4.7 |  |  | 4.6 |
Risk-free interest rate |  |  | 0.9 | % |  | 0.8 | %
Weighted average fair value of options granted |  | $ | 26.36 |  | $ | 26.37 |

Note 4. ACQUISITION OF BUSINESS AND OTHER ASSETS

During the three months ended September 30, 2013, we paid an aggregate of $10.1 million in cash to acquire all outstanding shares of a distributor of our bovine and dairy test products, as well as other food safety testing products, in Brazil. We recorde d provisional amounts for all of the assets acquired and the liabilities assumed based upon their estimated fair values at the date of the business acquisition. These provisional amounts are subject to revision as valuation work and other analyses are still being conducted. We may adjust our recorded provisional amounts as necessary, up to one year after the acquisition closing date, as we obtain more information regarding asset values and liabilities assumed as a result of the business acquisition.

A s part of this business acquisition, we reco rded $4.8 million in amortizable intangibl e assets other than goodwill and $6.2 million in goodwill. T he amortizable assets acquired consisted of a customer list, non-compete agreement and a trademark, which were assigned useful lives of 10, 5, and 15 years, respectively. Additionally, we have recorded $2.0 million in working capital, $0.4 million of fixed assets and $2.6 million of other liabilities. The weighted average useful life of all recognized amortizable intangible assets was 9.9 years. Goodwil l is calculated as the consider ation in excess of net assets recognized and represents the future economic benefits arising from othe r assets acquired that could not be individually identified and separately recognized. The goodwill and amortizable intangible assets recorded from this business acquisition are not deductible for income tax purposes. All assets acquired in connection wi th this business acquisition were assigned to our Livestock, Poultry and Dairy s egment. Pro forma information has not been presented for this business acquisition because such information is not material to the financial statements.

8

We acquired a customer list in February 2013 for a purchase price of $1.0 million, which was recorded entirely to intangible assets other than goodwill. The asset acquired was assigned to ou r Companion Animal Group segment.

Note 5. Inventories

Inventories include material, labor and overhead, and are stated at the lower of cost (first-in, first-out) or market. The components of inventories were as follows (in thousands):

|  | September 30, |  | December 31, |
|  |  | 2013 |  |  | 2012 |
Raw materials |  | $ | 24,916 |  | $ | 26,986 |
Work-in-process |  |  | 15,499 |  |  | 16,031 |
Finished goods |  |  | 105,572 |  |  | 97,929 |
|  | $ | 145,987 |  | $ | 140,946 |

Note 6. Goodwill and Intangible Assets, NET

The increase in goodwill during the nine months ended September 30, 2013 resulted from the impact of goodwill reco rded in connection with a business combination, partly offset by changes in foreign currency exchange rates. The decrease in intangible assets other than goodwill during the nine months ended September 30, 2013 resulted from the continued amortization of our intangible assets, partly offset by the impact of the acquisition of intangible assets. See Note 4 for a discussion of goodwill and amortizable intangible assets acquired during the nine months ended September 30, 2013.

NOTE 7. Other NONCURRENT ASSETS

Other noncurrent assets consisted of the following (in thousands):

|  | September 30, |  | December 31, |
|  |  | 2013 |  |  | 2012 |
Investment in long-term product supply arrangements |  | $ | 10,825 |  | $ | 10,324 |
Customer acquisition costs, net |  |  | 20,531 |  |  | 21,795 |
Other assets |  |  | 22,126 |  |  | 18,942 |
|  | $ | 53,482 |  | $ | 51,061 |

Note 8. Accrued liabilities

Accrued liabilities consisted of the following (in thousands):

|  | September 30, |  | December 31, |
|  | 2013 |  | 2012 |
Accrued expenses |  | $ | 40,617 |  | $ | 43,026 |
Accrued employee compensation and related expenses |  |  | 57,001 |  |  | 53,408 |
Accrued taxes |  |  | 9,887 |  |  | 14,945 |
Accrued customer programs |  |  | 26,656 |  |  | 26,367 |
|  | $ | 134,161 |  | $ | 137,746 |

NOTE 9. WARRANTY RESERVES

We provide a standard twelve month warranty on all instruments sold. We recognize the cost of instrument warranties in cost of product revenue at the time revenue is recognized based on the estimated cost to repair the instrument over its warranty period. Cost of product revenue reflects not only estimated warranty expense for instruments sold in the current period, but also any changes in estimated warranty expense for the portion of the aggregate installed base that is under warranty. Estimated warranty expense is based on a variety of inputs, including historical instrument performance in the customers’ environment, historical costs incurred in servicing instruments and projected instrument reliability. Should actual service rates or costs differ

9

from our estimates, revisions to the estimated warranty liability would be required. The liability for warranties is included in accrued liabilities in the accompanying condensed consolidated balance sheets.

The following is a summary of changes in accrued warranty reserves for the three and nine months ended September 30, 2013 and 2012 (in thousands):

|  | For the Three Months Ended |  |  | For the Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  |  | 2013 |  |  |  | 2012 |  |  |  | 2013 |  |  |  | 2012 |
Balance, beginning of period |  | $ | 1,308 |  |  | $ | 1,499 |  |  | $ | 1,583 |  |  | $ | 1,693 |
Provision for warranty expense |  |  | 441 |  |  |  | 539 |  |  |  | 1,350 |  |  |  | 1,655 |
Change in estimate, balance beginning of period |  |  | - |  |  |  | 7 |  |  |  | (133) |  |  |  | (92) |
Settlement of warranty liability |  |  | (540) |  |  |  | (613) |  |  |  | (1,591) |  |  |  | (1,824) |
Balance, end of period |  | $ | 1,209 |  |  | $ | 1,432 |  |  | $ | 1,209 |  |  | $ | 1,432 |

No te 10. DEBT

In May 2013, we refinanced our existing $300 million unsecured revolving credit facility by entering into an amended and restated credit agreement relating to a five-year unsecured revolving credit facility in the principal amount of $450 million with a syndicate of multinational banks, which matures on May 8, 2018 (the new credit facility and the previous credit facility are referred to collectively as the “Credit Facility”) and requires no scheduled prepayments before that date. Though the Credit Facility does not mature until May 8, 2018, all amounts borrowed under the terms of the Credit Facility are reflected in the current liabilities section in the accompanying condensed consolidated balance sheets because the Credit Facility contains a subjective material adverse event clause, which allows the debt holders to call the loans under the Credit Facility if we fail to notify the syndicate of such an event. The funds available u nder the Credit Facility at September 30, 2013 and December 31, 2012 reflect a further reduction due to the issuance of a letter of credit for $1.0 million, which was issued in connection with our workers’ compensation policy covering claims for the years 2009 through 2013.

Applicable interest rates on borrowings under the Credit Facility generally range from 0.875 to 1.25 percentage points (“Credit Spread”) above the London interbank offered rate or the Canadian Dollar-denominated bankers’ acceptance rate, based on our leverage ratio, or the prevailing prime rate plus a maximum spread of up to 0.25%, based on our leverage ratio. We have entered into forward fixed interest rate swap agreements to manage the economic effect of the first $80 million of variable interest rate borrowings. As such, we continue to designate the existing interest rate swaps as cash flow hedges. See Note 18 for a discussion of our derivative instruments and hedging activities. Under the Credit Facility, we pay quarterly commitment fees of 0.15% to 0.30%, based on our leverage ratio, on any unused commitment.

The obligations under the Credit Facility may be accelerated upon the occurrence of an event of default under the Credit Facility, which includes customary events of default including, without limitation, payment defaults, defaults in the performance of affirmative and negative covenants, the inaccuracy of representations or warranties, bankruptcy and insolvency related defaults, defaults relating to judgments, certain events related to employee pension benefit plans under the Employee Retirement Income Security Act of 1974, the failure to pay specified indebtedness, and a change of control default. The Credit Facility contains affirmative, negative and financial covenants customary for financings of this type. The negative covenants include restrictions on liens, indebtedness of subsidiaries of the Company, fundamental changes, investments, transactions with affiliates and certain restrictive agreements. The financial covenant is a consolidated leverage ratio test that requires our ratio of debt to earnings before interest, taxes, depreciation and amortization, defined as the consolidated leverage ratio under the terms of the Credit Facility, not to exceed 3-to-1. At September 30, 2013, we were in compliance with the covenants of the Credit Facility.

At September 30, 2013, our long-term debt is consistent with that discussed in Note 11 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2012.

10

Note 11. Repurchases of common STOCK

The following is a summary of our open market common stock repurchases for the three and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):

|  | For the Three Months Ended |  | For the Nine Months Ended
|  | September 30, |  | September 30,
|  | 2013 |  | 2012 |  | 2013 |  | 2012
Shares repurchased |  |  | 801 |  |  | 386 |  |  | 3,139 |  |  | 1,038
Total cost of shares repurchased |  | $ | 76,575 |  | $ | 36,146 |  | $ | 282,910 |  | $ | 91,152
Average cost per share |  | $ | 95.52 |  | $ | 93.76 |  | $ | 90.12 |  | $ | 87.82

We primarily acquire shares by means of repurchases in the open market. However, we also acquire shares that are surrendered by employees in payment for the minimum required withholding taxes due on the vesting of restricted stock units and the settlement of deferred stock units. The number of shares acquired through employee surrenders during both the three months ended September 30, 2013 and 2012 was not material. We acquired 47,483 shares having a total cost of $4.3 million in connection with such employee surren ders during the nine months ended September 30, 2013 compared to 51,484 shares having a total cost of $4.5 million during the nine months ended September 30, 2012.

We issue shares of treasury stock upon the vesting of certain restricted stock units and upon the exercise of certain stock options. The number of shares of treasury stock issued during both the nine months ended September 30, 2013 and 2012 was not material.

Note 12. Income Taxes

Our effective income tax rates were 29.1% and 28.9% for the t hree and nine months ended September 30, 2013, respectively, compared to 31.4% and 31.7% for the three and nine months ended September 30, 2012, respectively.

On January 2, 2013, U.S. federal legislation was enacted that retroactively allowed a research and development (“R&D”) tax credit for all of 2012 and extended the R&D tax credit through the twelve months ending December 31, 2013. For the three and nine months ended September 30, 2012, the U.S. legislation authorizing the R&D tax credit had expired and no associated tax benefit was recognized within these periods.

The decrease in our effective income tax rate for the three months ended September 30, 2013 as compared to the same period of the prior year was due primarily to tax benefits realized in the 2013 period resulting from the R&D tax credit and the resolution of an international audit, which resulted in a reduction in our provision for uncertain tax positions. The decrease in our effective income tax rate for the nine months ended September 30, 2013 as compared to the same period of the prior year was due primarily to the R&D tax credit. Because the related legislation was enacted in 2013, the full benefit of the R&D tax credit related to the prior year’s activities was recognized during the three months ended March 31, 2013.

Note 1 3. ACCUMULATED OTHER Comprehensive Income

The changes in accumulated other comprehensive income, net of tax, for the nine months ended September 3 0, 2013 consisted of the following (in thousands):

|  |  | Unrealized Loss on Investments, Net of Tax |  |  | Unrealized Loss on Derivative Instruments, Net of Tax |  |  | Cumulative Translation Adjustment |  |  | Total |
Balance as of December 31, 2012 |  | $ | (171) |  | $ | (2,070) |  | $ | 18,195 |  | $ | 15,954 |
Other comprehensive income (loss) before reclassifications |  |  | 142 |  |  | 3,066 |  |  | (2,115) |  |  | 1,093 |
Gains reclassified from accumulated other comprehensive income |  |  | - |  |  | (1,485) |  |  | - |  |  | (1,485) |
Balance as of September 30, 2013 |  | $ | (29) |  | $ | (489) |  | $ | 16,080 |  | $ | 15,562 |

11

The following is a summary of reclassifications out of accumulated other comprehensive income for the three and nine months ended September 30, 2013 and 2012 (in thousands):

Details about Accumulated Other Comprehensive Income Components |  | Affected Line Item in the Statement Where Net Income is Presented |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income For the Three Months Ended September 30, |
|  |  |  |  | 2013 |  |  | 2012 |
Gains (losses) on derivative instruments included in net income: |  |  |  |  |  |  |  |  |
Foreign currency exchange contracts |  | Cost of revenue |  | $ | 1,294 |  | $ | 1,379 |
Interest rate swaps |  | Interest expense |  |  | (131) |  |  | (112) |
|  | Total gains before tax |  |  | 1,163 |  |  | 1,267 |
|  | Tax expense |  |  | 329 |  |  | 395 |
|  | Gains, net of tax |  | $ | 834 |  | $ | 872 |
Details about Accumulated Other Comprehensive Income Components |  | Affected Line Item in the Statement Where Net Income is Presented |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income For the Nine Months Ended September 30, |
|  |  |  |  | 2013 |  |  | 2012 |
Gains (losses) on derivative instruments included in net income: |  |  |  |  |  |  |  |  |
Foreign currency exchange contracts |  | Cost of revenue |  | $ | 2,659 |  | $ | 5,202 |
Interest rate swaps |  | Interest expense |  |  | (632) |  |  | (574) |
|  | Total gains before tax |  |  | 2,027 |  |  | 4,628 |
|  | Tax expense |  |  | 542 |  |  | 1,434 |
|  | Gains, net of tax |  | $ | 1,485 |  | $ | 3,194 |

Note 14. Earnings per Share

Basic earnings per share is computed by dividing net income attributable to IDEXX Laboratories, Inc. stockholders by the weighted average number of shares of common stock and vested deferred stock units outstanding during the year. The computation of diluted earnings per share is similar to the computation of basic earnings per share, except that the denominator is increased for the assumed exercise of dilutive options and assumed issuance of unvested restricted stock units and unvested deferred stock units using the treasury stock method unless the effect is anti-dilutive. The treasury stock method assumes that proceeds, including cash received from the exercise of employee stock options, the total unrecognized compensation expense for unvested share-based compensation awards and the excess tax benefits resulting from share-based compensation tax deductions in excess of the related expense recognized for financial reporting purposes, would be used to purchase our common stock at the average market price during the period. Vested deferred stock units outstanding are included in shares outstanding for basic and diluted earnings per share because the associated shares of our common stock are issuable for no cash consideration, the number of shares of our common stock to be issued is fixed and issuance is not contingent. See Note 4 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2012 for additional information regarding deferred stock units.

The following is a reconciliation of shares outstanding for basic and diluted earnings per s hare for the three and nine months ended September 30, 2013 and 2012 (in thousands):

|  | For the Three Months Ended |  | For the Nine Months Ended
|  | September 30, |  | September 30,
|  | 2013 |  | 2012 |  | 2013 |  | 2012
Shares outstanding for basic earnings per share: |  | 52,450 |  | 54,938 |  | 53,562 |  | 55,074
Shares outstanding for diluted earnings per share: |  |  |  |  |  |  |  |
Shares outstanding for basic earnings per share |  | 52,450 |  | 54,938 |  | 53,562 |  | 55,074
Dilutive effect of share-based payment awards |  | 792 |  | 1,150 |  | 829 |  | 1,196
|  | 53,242 |  | 56,088 |  | 54,391 |  | 56,270

12

Certain options to acquire shares have been excluded from the calculation of shares outstanding for diluted earnings per share because they were anti-dilutive. The following table presents information concerning those anti-dilutive options for the three an d nine months ended September 30, 2013 and 2012 (in thousands):

|  | For the Three Months Ended |  | For the Nine Months Ended
|  | September 30, |  | September 30,
|  | 2013 |  | 2012 |  | 2013 |  | 2012
Weighted average number of shares underlying anti-dilutive options |  | 561 |  | 380 |  | 530 |  | 713

Note 1 5. Commitments, Contingencies and Guarantees

Significant commitments, contingencies and guarantees at September 30, 2013 are consistent with those discussed in Note 14 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2012.

Note 16. Segment Reporting

Prior to January 1, 2013, we operated primarily through three business segments: diagnostic and information technology-based products and services for the veterinary market, which we continue to refer to as our Companion Animal Group (“CAG”), water quality products (“Water”) and diagnostic products for livestock and poultry health, which we referred to as Livestock and Poultry Diagnostics. We also operated two smaller operating segments that comprised products for milk quality and safety (“Dairy”) and products for the human point-of-care medical diagnostics market (“OPTI Medical”). Financial information about our Dairy and OPTI Medical operating segments was combined and presented with our remaining pharmaceutical product line and our out-licensing arrangements in an “Other” category because they did not meet the quantitative or qualitative thresholds for reportable segments.

We have combined the management of our Livestock and Poultry Diagnostics, and Dairy lines of business to more effectively realize the market synergies between the product lines and to achieve operational efficiencies. We refer to this newly created segment as Livestock, Poultry and Dairy (“LPD”). Our OPTI Medical operating segment remains combined and presented with our remaining pharmaceutical product line and our out-licensing arrangements in an “Other” category because they do not meet the quantitative or qualitative thresholds for reportable segments. The segment income (loss) from operations discussed within t his report for the three and nine months ended September 30, 2012 has been retrospectively revised to reflect this change in the composition of our reportable segments.

13

The following is a summary of segment performance for the three and nine months ended September 30, 2013 and 2012 (in thousands):

|  | For the Three Months Ended September 30, |
|  |  | CAG |  | Water |  | LPD |  | Other |  | Unallocated Amounts |  | Consolidated Total |
2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ | 283,843 |  | $ | 23,247 |  | $ | 25,131 |  | $ | 6,076 |  | $ | - |  | $ | 338,297 |
Income from operations |  | $ | 52,711 |  | $ | 10,414 |  | $ | 1,125 |  | $ | 612 |  | $ | 623 |  | $ | 65,485 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,007) |
Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 64,478 |
Provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,786 |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 45,692 |
Less: Net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |
Net income attributable to IDEXX Laboratories, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 45,688 |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ | 262,357 |  | $ | 22,223 |  | $ | 24,696 |  | $ | 6,199 |  | $ | - |  | $ | 315,475 |
Income (loss) from operations |  | $ | 50,651 |  | $ | 10,128 |  | $ | 3,873 |  | $ | (488) |  | $ | (1,252) |  | $ | 62,912 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (400) |
Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,512 |
Provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,639 |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,873 |
Less: Net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 |
Net income attributable to IDEXX Laboratories, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 42,853 |

|  | For the Nine Months Ended September 30, |
|  |  | CAG |  | Water |  | LPD |  | Other |  | Unallocated Amounts |  | Consolidated Total |
2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ | 856,617 |  | $ | 66,297 |  | $ | 81,448 |  | $ | 18,623 |  | $ | - |  | $ | 1,022,985 |
Income (loss) from operations |  | $ | 167,377 |  | $ | 28,682 |  | $ | 9,176 |  | $ | 1,888 |  | $ | (1,689) |  | $ | 205,434 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,132) |
Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 203,302 |
Provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 58,745 |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 144,557 |
Less: Net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 |
Net income attributable to IDEXX Laboratories, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 144,542 |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ | 808,724 |  | $ | 63,788 |  | $ | 82,413 |  | $ | 18,875 |  | $ | - |  | $ | 973,800 |
Income (loss) from operations |  | $ | 157,337 |  | $ | 28,619 |  | $ | 15,563 |  | $ | (314) |  | $ | (2,069) |  | $ | 199,136 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,603) |
Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 197,533 |
Provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,606 |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 134,927 |
Less: Net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14 |
Net income attributable to IDEXX Laboratories, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 134,913 |

14

During the second quarter of 2013, we changed the name of our Practice Management product and service category within our CAG segment to Customer Information Man a gement in order to more closely align with our offerings. The following is a summary of revenue by product and servic e category for the three and nine months ended September 30, 2013 and 2012 (in thousands):

|  | For the Three Months Ended |  | For the Nine Months Ended
|  | September 30, |  | September 30,
|  |  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012
CAG segment revenue: |  |  |  |  |  |  |  |  |  |  |  |
VetLab® instruments and consumables |  | $ | 107,944 |  | $ | 101,325 |  | $ | 323,651 |  | $ | 307,565
Rapid assay products |  |  | 43,042 |  |  | 39,315 |  |  | 133,182 |  |  | 128,556
Reference laboratory diagnostic and consulting services |  |  | 110,292 |  |  | 101,449 |  |  | 333,858 |  |  | 309,696
Customer information management and digital imaging systems |  |  | 22,565 |  |  | 20,268 |  |  | 65,926 |  |  | 62,907
CAG segment revenue |  |  | 283,843 |  |  | 262,357 |  |  | 856,617 |  |  | 808,724
Water segment revenue |  |  | 23,247 |  |  | 22,223 |  |  | 66,297 |  |  | 63,788
LPD segment revenue |  |  | 25,131 |  |  | 24,696 |  |  | 81,448 |  |  | 82,413
Other segment revenue |  |  | 6,076 |  |  | 6,199 |  |  | 18,623 |  |  | 18,875
Total revenue |  | $ | 338,297 |  | $ | 315,475 |  | $ | 1,022,985 |  | $ | 973,800

Note 17. FAIR VALUE MEASUREMENTS

U.S. GAAP defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. U.S. GAAP requires an entity to maximize the use of observable inputs, where available, and minimize the use of unobservable inputs when measuring fair value.

The Company has certain financial assets and liabilities that are measured at fair value on a recurring basis, certain nonfinancial assets and liabilities that may be measured at fair value on a nonrecurring basis and certain financial assets and liabilities that are not measured at fair value in our condensed consolidated balance sheets but for which we disclose the fair value. The fair value disclosures of these assets and liabilities are based on a three-level hierarchy, which is defined as follows:

Level 1 | Quoted prices in active markets for identical assets or liabilities that the entity can access at the measurement date.
Level 2 | Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3 | Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. We did not have any significant nonfinancial assets or nonfinancial liabilities which requi red remeasurement during the nine months ended September 30, 2013. We did not have any transfers between Level 1 and Level 2 or transfers in or out of Level 3 of the fai r value hierarchy during the nine months ended September 30, 2013.

Our foreign currency exchange contracts and interest rate swap agreements are measured at fair value on a recurring basis in our accompanying condensed consolidated balance sheets. We measure the fair value of our foreign currency exchange contracts classified as derivative instruments using an income approach, based on prevailing market forward rates less the contract rate multiplied by the notional amount. The product of this calculation is then adjusted for counterparty risk. We measure the fair value of our interest rate swaps classified as derivative instruments using an income approach, utilizing a discounted cash flow analysis based on the terms of the contract and the interest rate curve adjusted for counterparty risk.

15

The amount outstanding under our Credit Facility, notes receivable and long-term debt are measured at carrying value in our accompanying condensed consolidated balance sheets though we disclose the fair value of these financial instruments. We determine the fair value of the amount outstanding under our Credit Facility, notes receivable and long-term debt using an income approach, utilizing a discounted cash flow analysis based on current market interest rates for debt issues with similar remaining years to maturity, adjusted for applicable credit risk. Our Credit Facility and long-term debt are valued using level 2 inputs, while our notes receivable, representing a strategic investment in a privately held company with a carrying value of $4.9 milli on as of September 30, 2013, are valued using level 3 inputs. The results of these calculations yield fair values that approximate carrying values.

The following tables set forth our assets and liabilities that were measured at fair value on a recurring basis at September 30, 2013 and at December 31, 2012 by level within the fair value hierarchy (in thousands):

|  | Quoted Prices |  | Significant |  |  |  |  |
|  | in Active |  | Other |  | Significant |  |  |
|  | Markets for |  | Observable |  | Unobservable |  |
|  | Identical Assets |  | Inputs |  | Inputs |  | Balance at
As of September 30, 2013 |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | September 30, 2013
Assets |  |  |  |  |  |  |  |  |  |  |  |
Money market funds(1) |  | $ | 143,101 |  | $ | - |  | $ | - |  | $ | 143,101
Equity mutual funds(2) |  |  | 2,559 |  |  | - |  |  | - |  |  | 2,559
Foreign currency exchange contracts(3) |  |  | - |  |  | 2,594 |  |  | - |  |  | 2,594
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange contracts(3) |  |  | - |  |  | 2,149 |  |  | - |  |  | 2,149
Deferred compensation(4) |  |  | 2,559 |  |  | - |  |  | - |  |  | 2,559
Interest rate swaps(5) |  |  | - |  |  | 1,943 |  |  | - |  |  | 1,943

|  | Quoted Prices |  | Significant |  |  |  |
|  | in Active |  | Other |  | Significant |  |
|  | Markets for |  | Observable |  | Unobservable |  |
|  | Identical Assets |  | Inputs |  | Inputs |  | Balance at
As of December 31, 2012 |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | December 31, 2012
Assets |  |  |  |  |  |  |  |  |  |  |  |
Money market funds(1) |  | $ | 127,576 |  | $ | - |  | $ | - |  | $ | 127,576
Equity mutual funds(2) |  |  | 2,320 |  |  | - |  |  | - |  |  | 2,320
Foreign currency exchange contracts(3) |  |  | - |  |  | 2,128 |  |  | - |  |  | 2,128
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange contracts(3) |  |  | - |  |  | 2,193 |  |  | - |  |  | 2,193
Deferred compensation(4) |  |  | 2,320 |  |  | - |  |  | - |  |  | 2,320
Interest rate swaps(5) |  |  | - |  |  | 2,682 |  |  | - |  |  | 2,682

_____________

(1) | Money market funds are included within cash and cash equivalents. The remaining balance of cash and cash equivalents as of September 30, 2013 and December 31, 2012 consisted of demand deposits.

(2) | Equity mutual funds relate to a deferred compensation plan that was assumed as part of a previous business combination. This amount is included within other long-term assets, net. See number (4) below for a discussion of the related deferred compensation liability.

(3) | Foreign currency exchange contracts are included within other current assets; other long-term assets, net; accrued liabilities; or other long-term liabilities depending on the gain (loss) position and anticipated settlement date.

(4) | A deferred compensation plan assumed as part of a previous business combination is included within other long-term liabilities. The fair value of our deferred compensation plan is indexed to the performance of the underlying equity mutual funds discussed in number (2) above.

(5) | Interest rate swaps are included within accrued liabilities.

The estimated fair value of certain financial instruments, including cash and cash equivalents, accounts receivable and accounts payable, approximate carrying value due to their short maturity.

16

Note 18. Derivative Instruments and Hedging

Disclosure within this footnote is presented to provide transparency about how and why we use derivative instruments, how the instruments and related hedged items are accounted for, and how the instruments and related hedged items affect our financial position, results of operations and cash flows.

We are exposed to certain risks related to our ongoing business operations. The primary risks that we manage by using derivative instruments are foreign currency exchange risk and interest rate risk. Our subsidiaries enter into foreign currency exchange contracts to manage the exchange risk associated with their forecasted intercompany inventory purchases and sales for the next year. From time to time, we may also enter into foreign currency exchange contracts to minimize the impact of foreign currency fluctuations associated with specific, significant transactions. We enter into interest rate swaps to minimize the impact of interest rate fluctuations associated with our variable-rate debt.

The primary purpose of our foreign currency hedging activities is to protect against the volatility associated with foreign currency transactions, including transactions denominated in Euro, British pound, Japanese yen, Canadian dollar, Australian dollar and Swiss franc. We also utilize natural hedges to mitigate our transaction and commitment exposures. Our corporate policy prescribes the range of allowable hedging activity. We enter into foreign currency exchange contracts with large multinational financial institutions and we do not hold or engage in transactions involving derivative instruments for purposes other than risk management.

We recognize all derivative instruments, including our foreign currency exchange contracts and interest rate swap agreements, on the balance sheet at fair value at the balance sheet date. Derivative instruments that do not qualify for hedge accounting treatment must be recorded at fair value through earnings. To qualify for hedge accounting treatment, cash flow hedges must be highly effective in offsetting changes to expected future cash flows on hedged transactions. If a derivative instrument qualifies for hedge accounting, c hanges in the fair value of the derivative instrument from the effective portion of the hedge are deferred in A OCI, net of tax, and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. We immediately record in earnings the extent to which a hedge instrument is not effective in achieving offsetting changes in fair value. We de-designate derivative instruments from hedge accounting when the likelihood of the hedged transaction occurring becomes less than probable. For de-designated instruments, the gain or loss from the time of de-designation through maturity of the instrument is recognized in earnings. Any gain or loss in A OCI at the time of de-designation is reclassified into earnings in the same period or periods during which the hedged transacti on affects earnings. See Note 13 for further information regarding the effect of derivative instruments designated as cash flow hedges on the condensed consolidated statement of operations for the three and nine months ended September 30, 2013 and 2012.

We enter into master netting arrangements with the counterparties to our derivative transactions which permit outstanding receivables and payables to be offset in the event of default. Our derivative contracts do not require either party to post cash collateral. We elect to present our derivative assets and liabilities in the accompanying condensed consolidated balance sheets on a gross basis. All cash flows related to our foreign currency exchange contracts and interest rate swaps are classified as operating cash flows, which is consistent with the cash flow treatment of the underlying items being hedged.

Cash Flow Hedges

We have designated our foreign currency exchange contracts and variable-to-fixed interest rate swaps as cash flow hedges as these derivative instruments mitigate the exposure to variability in the cash flows of forecasted transactions attributable to foreign currency exchange and interest rates. Unless noted otherwise, we have also designated our derivative instruments as qualifying for hedge accounting treatment.

We did not de-designate any instruments from hedge accounting tr eatment during the three and nine months ended September 30, 2013 or 2012. Gains or losses related to hedge ineffectiveness recognized in earnings during the three and nine months ended September 30, 2013 and 2012 were not material. At Septem ber 30, 2013, the estimated amount of net gains, net of income tax expense, which are expected to be reclassified out of A OCI and into earnings within the next 12 months if exchange and interest rates do not fluctuate from the levels at September 30, 2013 is less than $0.1 million.

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We enter into foreign currency exchange contracts for amounts that are less than the full value of forecasted intercompany inventory purchases and sales. Our hedging strategy related to intercompany inventory purchases and sales is to employ the full amount of our hedges for the succeeding year at the conclusion of our budgeting process for that year. We primarily utilize foreign currency exchange contracts with durations of less than 24 months. Quarterly, we enter into contracts to hedge incremental portions of anticipated foreign currency transactions for the current and following year. As a result, our risk with respect to foreign currency exchange rate fluctuations and the notional value of foreign currency exchange contracts may vary throughout the year. The U.S. dollar is the currency purchased or sold in all of our foreign currency exchange contracts. The notional amount of foreign currency exchange contracts to hedge forecasted intercompany inventory purchases and sales totale d $1 66.2 million and $157.0 mill ion at September 30, 2013 and December 31, 2012, respectively.

We have entered into forward fixed interest rate swap agreements to manage the economic effect of variable interest obligations on amounts borrowed under the terms of our Credit Facility. Beginning on March 30, 2012, the variable interest rate associated with $40 million of borrowings outstanding under the Credit Facility became effectively fixed at 1.36% plus the Credit Spread through June 30, 2016. Beginning on March 28, 2013, the variable interest rate associated with an additional $40 million of borrowings outstanding under the Credit Facility became effectively fixed at 1.64% plus the Credit Spread through June 30, 2016. Two of our forward fixed interest rate swap agreements expired on March 31, 2012. Under these agreements, the variable interest rate associated with $80 million of borrowings outstanding under the Credit Facility had been effectively fixed at 2% plus the Credit Spread.

The fair values of derivative instruments, their respective classification on the condensed consolidated balance sheets and amounts subject to offset under master netting arrangements consisted of the following (in thousands):

|  |  |  | Asset Derivatives
|  |  |  | September 30, |  |  | December 31,
|  |  |  |  | 2013 |  |  | 2012
Derivatives designated as hedging instruments |  | Balance Sheet Classification |  |  |  |  |  |
Foreign currency exchange contracts |  | Other current assets |  | $ | 2,266 |  | $ | 2,128
Foreign currency exchange contracts |  | Other long-term assets, net |  |  | 328 |  |  | -
Total derivative instruments presented on the balance sheet |  |  | 2,594 |  |  | 2,128
Gross amounts subject to master netting arrangements not offset on the balance sheet |  |  | 1,861 |  |  | 1,918
Net amount |  |  |  | $ | 733 |  | $ | 210

|  |  |  | Liability Derivatives
|  |  |  | September 30, |  |  | December 31,
|  |  |  |  | 2013 |  |  | 2012
Derivatives designated as hedging instruments |  | Balance Sheet Classification |  |  |  |  |  |
Foreign currency exchange contracts |  | Accrued liabilities |  | $ | 1,782 |  | $ | 2,193
Foreign currency exchange contracts |  | Other long-term liabilities |  |  | 367 |  |  | -
Interest rate swaps |  | Accrued liabilities |  |  | 1,943 |  |  | 2,682
Total derivative instruments presented on the balance sheet |  |  | 4,092 |  |  | 4,875
Gross amounts subject to master netting arrangements not offset on the balance sheet |  |  | 1,861 |  |  | 1,918
Net amount |  |  |  | $ | 2,231 |  | $ | 2,957

The effect of derivative instruments designated as cash flow hedges on the condensed consolidated balance sheets consisted of the following (in thousands):

|  |  | Gain (Loss) Recognized in OCI on Derivative Instruments (Effective Portion) |
|  |  | For the Three Months Ended |  | For the Nine Months Ended |
|  |  | September 30, |  | September 30, |
Derivative instruments |  |  |  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Foreign currency exchange contracts, net of tax |  |  | $ | (4,380) |  | $ | (3,227) |  | $ | 1,117 |  | $ | (4,655) |
Interest rate swaps, net of tax |  |  |  | (55) |  |  | (329) |  |  | 464 |  |  | (868) |
Total derivative instruments, net of tax |  |  | $ | (4,435) |  | $ | (3,556) |  | $ | 1,581 |  | $ | (5,523) |

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Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations.

This Quarterly Report on Form 10-Q contains statements which, to the extent they are not statements of historical fact, constitute “forward-looking statements.” Such forward-looking statements about our business and expectations within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, include statements relating to future revenue growth rates, earnings and other measures of financial performance, the effect of economic conditions on our business performance; demand for our products; realizability of assets; future cash flow and uses of cash; future repurchases of common stock; future levels of indebtedness and capital spending; interest expense; warranty expense; share-based compensation expense; and competition. Forward-looking statements can be identified by the use of words such as “expects,” “may,” “anticipates,” “intends,” “would,” “will,” “plans,” “believes,” “estimates,” “should,” and similar words and expressions. These forward-looking statements are intended to provide our current expectations or forecasts of future events; are based on current estimates, projections, beliefs, and assumptions; and are not guarantees of future performance. Actual events or results may differ materially from those described in the forward-looking statements. These forward-looking statements involve a number of risks and uncertainties as more fully described under the heading “Part II, Item 1A. Risk Factors” in this Quarterly Report on Form 10-Q. The risks and uncertainties discussed herein do not reflect the potential impact of any mergers, acquisitions or dispositions. In addition, any forward-looking statements represent our estimates only as of the day this Quarterly Report was first filed with the Securities and Exchange Commission (“SEC”) and should not be relied upon as representing our estimates as of any subsequent date. From time to time, oral or written forward-looking statements may also be included in other materials released to the public. While we may elect to update forward-looking statements at some point in the future, we specifically disclaim any obligation to do so, even if our estimates or expectations change.

§ | Business Overview and Trends

Operating segments. Prior to January 1, 2013, IDEXX Laboratories, Inc. and our wholly-owned and majority-owned subsidiaries (“IDEXX,” the “Company,” “we” or “our”) operated primarily through three business segments: diagnostic and information technology-based products and services for the veterinary market, which we continue to refer to as the Companion Animal Group (“CAG”); water q uality products (“Water”); and diagnostic products for livestock and poultry health, which we refer red to as Livestock and Poultry Diagnostics. We also operate d two smaller operating segments that comprise products for milk quality and safety (“Dairy”) and products for the human point-of-care medical diagnostics market (“OPTI Medical”). Financial information about our Dairy and OPTI Medical operating segments wa s combined and presented with our remaining pharmaceutical product line and our out-licensing arrangements in an “Other” category because they d id not meet the quantitative or qualitative thresholds for reportable segments.

W e have combined the management of our Livestock and Poultry Diagnostics, and Dairy lines of business to more effectively realize the market synergies between the product lines and to achieve operational efficiencies. We refer to this newly created segment as Livestock, Poultry and Dairy (“LPD”). Our OPTI Medical operating segment remains combined and presented with our remaining pharmaceutical product line and our out-licensing arrangements in an “Other” category because they do not meet the quantitative or qualitative thresholds for reportable segments. The segment income (loss) from operations discussed with in this report for the three and nine months ended September 30, 2012 has been retrospectively revised to reflect this change in the composition of our reportable segments. See Note 1 6 to the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q for financial information about our segments and the section entitled “Description of Business by Segment” under the heading “Item 1. Business” in our Annual Report on Form 10-K for the year ended December 31, 2012 for additional description pertaining to our product and services.

CAG develops, designs, manufactures, and distributes products and performs services for veterinarians and the bioresearch market, primarily related to diagnostics and information management. Water develops, designs, manufactures and distributes a range of products used in the detection of various microbiological parameters in water. LPD develops, designs, manufactures and distributes diagnostic tests and related instrumentation that are used to det ect a wide range of diseases, to monitor health status in livestock and poultry and to detect contaminants in milk. OPTI Medical develops, designs, manufactures, and distributes point-of-care electrolyte and blood gas analyzers and related consumable products for the human medical diagnostics market. Further, OPTI Medical manufactures the dry slide electrolyte consumables that are a subset of the consumables used with our Catalyst Dx® analyzer and our VetStat® Electrolyte and Blood Gas Analyzer and associated cassettes for our CAG segment.

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Effects of Certain Factors on Results of Operations

Distributor Purchasing and Inventories. The instrument consumables and rapid assay products in our CAG segment are sold in the U.S. and certain other geographies by third party distributors, who purchase products from us and sell them to veterinary practices, which are the end users. As a result, distributor purchasing dynamics have an impact on our reported sales of these products. Distributor purchasing dynamics may be affected by many factors and in a given period may not be directly related to underlying end-user demand for our products. Consequently, reported results may reflect fluctuations in inventory levels held at distributors and not necessarily reflect changes in underlying end-user demand. Therefore, we believe it is important to track distributor sales to end users and to distinguish between the impact of end-user demand and the impact of distributor purchasing dynamics on reported revenue.

Where growth rates are affected by changes in end-user demand, we refer to this as the impact of practice-level sales on growth. Where growth rates are affected by distributor purchasing dynamics, we refer to this as the impact of changes in distributors’ inventories on growth. If during the current year, distributors’ inventories grew by less than those inventories grew in the comparable period of the prior year, then changes in distributors’ inventories have an unfavorable impact on our reported sales growth in the current period. Conversely, if during the current year, distributors’ inventories grew by more than those inventories grew in the comparable period of the prior year, then changes in distributors’ inventories have a favorable impact on our reported sales growth in the current period.

Consistent with our estimate as of Se ptember 30, 2012, we believe that our U.S. CAG distributors typically hold inventory equivalent to approximately four weeks of the anticipated end-user demand for instrument consumables and rapid assay products at the end of a quarter.

Currenc y Impact. For the three and nine months ended September 30, 2013, approximately 25% and 26%, respectively, of our revenue was derived from products manufactured in the U.S. and sold internationally in local currencies compared to 25% for both the three and nine months ended September 30, 2012. Strengthening of the rate of exchange for the U.S. dollar relative to other currencies has a negative impact on our revenues derived in currencies other than the U.S. dollar and on profits of products manufactured in the U.S. and sold internationally, and a weakening of the U.S. dollar has the opposite effect. Similarly, to the extent that the U.S. dollar is stronger in current or future periods relative to the exchange rates in effect in the corresponding prior periods, our growth rate will be negatively affected. The impact of foreign currency denominated operating expenses and foreign currency denominated supply contracts partly offset this exposure.

The impact on revenue resulting from changes in foreign currency exchange rates is not a measure defined by generally accepted accounting principles in the United States of America (“U.S. GAAP”), otherwise referred to herein as a non-U.S. GAAP measure. We calculate the impact on revenue resulting from changes in foreign currency exchange rates by applying the difference between the weighted average exchange rates during the current year period and the comparable previous year period to foreign currency denominated revenues for the current year period.

During the three and nine months ended September 30, 2013, as compared to the same periods of the prior year, changes in foreign currency exchange rates decreased total company revenue by approximately $2.2 million and $6.9 million, respectively, due primarily to the strengthening of the U.S. dollar against the Japanese yen.

Effect s of Economic Conditions. Demand for many of our products and services has been negatively affected by economic conditions since mid-2008. In our CAG segment, we believe that low economic growth and relatively high unemployment have led to negative or cautious consumer sentiment, which has affected the number of patient visits to veterinary clinics. With regard to the U.S., based on data provided by a subset of our customers that use our practice management systems, we observed patient visits were flat to slightly down beginning in 2009. Beginning in the fourth quarter of 2011, we observed a slight improvement in the growth of patient visits, followed by further improvement during 2012 over the previous year periods. This improvement slowed during the first nine months of 2013. We believe that this data, though limited, provides a fair and meaningful representation of the trend in patient visit activity in the U.S. Economic conditions in certain European countries remain challenging, which we believe has a negative impact on our CAG segment in particular. We believe that the overall trend in patient visits since the beginning of the economic downturn has had a slightly negative impact on the growth rate of sales of rapid assay tests, VetLab® instrument consumables and reference laboratory diagnostic and consulting services. In addition, we believe the rate of growth of sales of our VetLab instruments, digital radiography and practice management systems, which are larger capital purchases for veterinarians, has also been affected by continued caution among veterinarians regarding economic conditions. Weaker economic conditions since mid-2008 have also caused our customers to remain sensitive to the pricing of our products and services resulting in lower revenue growth due to limited price increases for certain products.

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We also believe that current economic conditions have affected purchasing decisions of our Water and LPD business customers. Lower water testing volumes have resulted from a decline in discretionary testing and a decline in mandated testing as a result of lower home and commercial construction. Fiscal difficulties in certain European countries have also reduced government funding for some water and livestock testing programs.

We believe that the diversity of our products and services and the geographic diversity of our markets have partially mitigated the effects of the economic environment and negative consumer sentiment on our revenue growth rates. Looking forward, we are cautiously optimistic that the improvements we began to see in the U.S. commencing in the fourth quarter of 2011 and continuing in 2012 and 2013 are reflective of a gradual improvement in the macroeconomic environment that over time will further reduce these effects.

§ | Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations is based upon our condensed consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates. We base our estimates on historical experience and on various assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates. The significant accounting policies used in preparation of these condensed consolidated financial statements for the three and nine months ended September 30, 2013 are consistent with those discussed in Note 2 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 201 2. T he critical accounting policies and the significant judgments and estimates used in the preparation of our condensed consolidated financial statements for the three and nine months ended September 30, 2013 are consistent with those discussed in our Annual Report on Form 10-K for the year ended December 31, 2012 in the section under the heading “Part 2, Item 7. Management’s Discussion and Analysis of Financial Cond ition and Results of Operations - Critical Accounting Policies and Estimates.”

§ | Results of Operations

Three Months En ded September 30, 2013 Compared to Three Months Ended September 30, 2012

Revenue

The following revenue analysis and discussion focuses on organic revenue growth. Organic revenue growth should be considered in addition to, and not as a replacement for or as a superior measure to, revenues reported in accordance with U.S. GAAP, and may not be comparable to similarly titled measures reported by other companies. Management believes that reporting organic revenue growth provides useful information to investors by facilitating easier comparisons of our revenue performance with prior and future periods and to our peers. We exclude the effect of changes in foreign currency exchange rates because changes in foreign currency exchange rates are not under management’s control, are subject to volatility, and can obscure underlying business trends. We exclude the effect of acquisitions because the nature, size and number of acquisitions can vary dramatically from period to period and therefore can also obscure underlying business trends.

Organic revenue growth and the percentage changes in revenue from currency and acquisitions are non-U.S. GAAP measures. See the subsection above titled “Effects of Certain Factors on Results of Operations” for a description of the calculation of the percentage change in revenue resulting from changes in foreign currency exchange rates. The percentage change in revenue resulting from acquisitions represents incremental revenues attributable to acquisitions that have occurred since the beginning of the prior year period.

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Total Company. The following table presents revenue by operating segment:

Net Revenue (dollars in thousands) |  | For the Three Months Ended September 30, 2013 |  | For the Three Months Ended September 30, 2012 |  | Dollar Change |  | Percentage Change |  | Percentage Change from Currency |  | Percentage Change from Acquisitions |  | Organic Revenue Growth
CAG |  | $ | 283,843 |  | $ | 262,357 |  | $ | 21,486 |  | 8.2 | % |  | (0.9 | %) |  | 0.4 | % |  | 8.7 | %
Water |  |  | 23,247 |  |  | 22,223 |  |  | 1,024 |  | 4.6 | % |  | (0.7 | %) |  | - |  |  | 5.3 | %
LPD |  |  | 25,131 |  |  | 24,696 |  |  | 435 |  | 1.8 | % |  | 1.1 | % |  | 2.8 | % |  | (2.1 | %)
Other |  |  | 6,076 |  |  | 6,199 |  |  | (123 | ) | (2.0 | %) |  | 0.3 | % |  | - |  |  | (2.3 | %)
Total Company |  | $ | 338,297 |  | $ | 315,475 |  | $ | 22,822 |  | 7.2 | % |  | (0.7 | %) |  | 0.5 | % |  | 7.4 | %

Companion Animal Group. The following table presents revenue by product and service category for CAG, with the exception of the VetLab instruments, consumables, and service and accessories categories, which represent VetLab subcomponents:

Net Revenue (dollars in thousands) |  | For the Three Months Ended September 30, 2013 |  | For the Three Months Ended September 30, 2012 |  | Dollar Change |  | Percentage Change |  | Percentage Change from Currency |  | Percentage Change from Acquisitions |  | Organic Revenue Growth
VetLab instruments |  | $ | 19,085 |  | $ | 21,730 |  | $ | (2,645 | ) | (12.2 | %) |  | (2.0 | %) |  | - |  |  | (10.2 | %)
VetLab consumables |  |  | 75,813 |  |  | 67,703 |  |  | 8,110 |  | 12.0 | % |  | (0.7 | %) |  | - |  |  | 12.7 | %
VetLab service and accessories |  |  | 13,047 |  |  | 11,892 |  |  | 1,155 |  | 9.7 | % |  | (2.6 | %) |  | - |  |  | 12.3 | %
Rapid assay products |  |  | 43,042 |  |  | 39,315 |  |  | 3,727 |  | 9.5 | % |  | (0.5 | %) |  | - |  |  | 10.0 | %
Reference laboratory diagnostic and consulting services |  |  | 110,291 |  |  | 101,449 |  |  | 8,842 |  | 8.7 | % |  | (0.9 | %) |  | 0.3 | % |  | 9.3 | %
Customer information management and digital imaging systems |  |  | 22,565 |  |  | 20,268 |  |  | 2,297 |  | 11.3 | % |  | (0.4 | %) |  | 3.1 | % |  | 8.6 | %
Net CAG revenue |  | $ | 283,843 |  | $ | 262,357 |  | $ | 21,486 |  | 8.2 | % |  | (0.9 | %) |  | 0.4 | % |  | 8.7 | %

The decrease in VetLab instruments revenue was due primarily to lower hematology and chemistry instrument placements.

VetLab consumables revenue growth was due to higher unit volumes and, to a lesser extent, higher realized prices. The increase in unit volumes resulted primarily from growth of our installed base for our Catalyst Dx® and ProCyte Dx® instruments as a result of customer acquisitions, as well as an increase in testing from existing customers wh o upgraded to these instruments, partially offset by lower sales of consumables us ed with our VetTest® chemistry instrument. Higher realized prices were due primarily to changes in certain distributor arrangements. The imp act of changes in distributors’ inventory levels reduced reported consumables revenue gro wth by approximately 5%.

VetLab service and accessories revenue growth was primarily a result of the increase in our active installed base of instruments.

The increase in rapid assay product revenue was due primarily to an increase in sales volumes, most notably higher canine practice-level sales volumes, and higher average unit sales prices resulting from price increases. The impact of changes in distributors’ inventory levels contributed approximately 1% to r eported revenue growth. A portion of the higher canine practice-level sales volumes was due to the impact of changes to customer loyalty programs, which resulted in a shift of sales volumes from the first quarter to the second and third quarters.

The increase in reference laboratory diagnostic and consulting services revenue resulted primarily from the impact of higher testing volumes and, to a lesser extent, price increases. Higher testing volumes were driven by the acquisition of new customers, increased testing volumes from existing customers and improved customer retention.

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The increase in customer information management and digital imaging systems revenue resulted primarily from higher support revenue due to an increase in our active installed base and revenue from Pet Health Network® Pro, which launched commercially in the first quarter of 2013.

Water. The increase in Water revenue resulted from higher sales of our Colilert® product s and increased sales volumes of our Filta-Max® products. Higher sales of our Colilert product s were the result of higher sales volumes in North America, a geography where these products are sold at higher average unit sales prices.

Livestock, Poultry and Dairy. The decrease in LPD revenue resulted primarily from lower sales volumes of Bovine Spongiform Encephalopathy (“BSE”) tests resulting from changes in European Union testing requirements, partly offset by higher sales volumes of certain swine tests.

Other. The decrease in Other revenue was attributable primarily to lower sales volumes associated with our pharmaceutical product line, partly offset by higher sales volumes of consumables used with our OPTI Medical instruments and royalty revenue from our pharmaceutical out-licensing arrangements.

Gross Profit

Total Company. The following table presents gross profit and gross profit percentages by operating segment:

Gross Profit (dollars in thousands) |  | For the Three Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Three Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
CAG |  | $ | 152,359 |  |  | 53.7 | % |  | $ | 138,558 |  |  | 52.8 | % |  | $ | 13,801 |  |  | 10.0 | %
Water |  |  | 15,598 |  |  | 67.1 | % |  |  | 14,489 |  |  | 65.2 | % |  |  | 1,109 |  |  | 7.7 | %
LPD |  |  | 13,140 |  |  | 52.3 | % |  |  | 14,632 |  |  | 59.2 | % |  |  | (1,492 | ) |  | (10.2 | %)
Other |  |  | 2,978 |  |  | 49.0 | % |  |  | 2,575 |  |  | 41.5 | % |  |  | 403 |  |  | 15.7 | %
Unallocated Amounts |  |  | 1,708 |  |  | N/A |  |  |  | 381 |  |  | N/A |  |  |  | 1,327 |  |  | 348.3 | %
Total Company |  | $ | 185,783 |  |  | 54.9 | % |  | $ | 170,635 |  |  | 54.1 | % |  | $ | 15,148 |  |  | 8.9 | %

Companion Animal Group. Gross profit for CAG increased due to higher sales and an increase in the gross profit percentage to 54% from 53%. The increase in gross pr ofit percentage resulted from higher average unit sales prices due primarily to price increases for our reference laboratory diagnostic and consulting services and a combination of higher relative sales of VetLab consumables that yield higher margins and lower relative sales of low margin VetLab instruments.

Water. Gross profit for Water increased due to higher sales and an increase in the gross profit pe rcentage to 67% from 65%. The in crease in the gross profit percentage was due primarily to lower relative sales of low margin products, higher relative sales of our Colilert products in North America where these products are sold at higher average unit sales prices and lower overall manufacturing costs driven by a decrease in materials cost.

Livestock, Poultry and Dairy. Gross profit for LPD decreased due to a decrease in the gross profit percentage to 52% from 59%, partly offset by higher sales. The decrease in the gross profit percentage was due to higher overall manufacturing costs, due primarily to lower production volumes in certain product lines and an increase in materials costs.

Other. Gross profit for Other increased due to an increase in the gross profit percentage to 49% from 42%, partly offset by lower sales. The increase in the gross profit percentage was due to higher relative royalty revenue from our remaining pharmaceutical out-licensing arrangements and sales of consumables used with our OPTI Medical instruments, both of which yield higher m argins, as well as a decrease in OPTI Medical manufacturing costs resulting from a reduction in materials costs.

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Unallocated Amounts. Gross profit for Unallocated Amounts increased due to changes in certain currency exchange rates and a decrease i n certain manufacturing costs. In certain geographies where w e maintain inventories in currencies other than the U.S. dollar, the product costs reported in our operating segments include our standard cost for products sold stated at the budgeted currency exchange rate from the beginning of the fiscal year, which is used to establish our standard costs for products sold. In these geographies, the variances from standard cost for products sold related to changes in currency exchange rates are reported within the caption “Unallocated Amounts”. For th e three months ended September 3 0, 2013, these variances were due primarily to the cost of product sold in Japan. Additionally, t he manufacturing costs reported in our operating segments include our standard cost for products sold and certain variances from standard cost for products purchased or manufactured within the period. We capitalize these variances for inventory on hand at the end of the period to record inventory in accordance with U.S. GAAP. We then record these variances as cost of product rev enue as that inventory is sold. The impact to cost of product revenue resulting from this variance capitalization and subsequent recognition is reported within the caption “Unallocated Amounts.” The net impact to gross profit as a result of manufacturing cos ts was favorable during the three months ended September 30, 2013 as result of the recognition of prior favorable variance capitalization in 2012.

Operating Expenses and Operating Income

Total Company. The following tables present operating expenses and operating income by operating segment:

Operating Expenses (dollars in thousands) |  | For the Three Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Three Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
CAG |  | $ | 99,648 |  |  | 35.1 | % |  | $ | 87,907 |  |  | 33.5 | % |  | $ | 11,741 |  |  | 13.4 | %
Water |  |  | 5,184 |  |  | 22.3 | % |  |  | 4,361 |  |  | 19.6 | % |  |  | 823 |  |  | 18.9 | %
LPD |  |  | 12,015 |  |  | 47.8 | % |  |  | 10,759 |  |  | 43.6 | % |  |  | 1,256 |  |  | 11.7 | %
Other |  |  | 2,366 |  |  | 38.9 | % |  |  | 3,063 |  |  | 49.4 | % |  |  | (697 | ) |  | (22.8 | %)
Unallocated Amounts |  |  | 1,085 |  |  | N/A |  |  |  | 1,633 |  |  | N/A |  |  |  | (548 | ) |  | (33.6 | %)
Total Company |  | $ | 120,298 |  |  | 35.6 | % |  | $ | 107,723 |  |  | 34.1 | % |  | $ | 12,575 |  |  | 11.7 | %

Operating Income (dollars in thousands) |  | For the Three Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Three Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
CAG |  | $ | 52,711 |  |  | 18.6 | % |  | $ | 50,651 |  |  | 19.3 | % |  | $ | 2,060 |  |  | 4.1 | %
Water |  |  | 10,414 |  |  | 44.8 | % |  |  | 10,128 |  |  | 45.6 | % |  |  | 286 |  |  | 2.8 | %
LPD |  |  | 1,125 |  |  | 4.5 | % |  |  | 3,873 |  |  | 15.7 | % |  |  | (2,748 | ) |  | (71.0 | %)
Other |  |  | 612 |  |  | 10.1 | % |  |  | (488 | ) |  | (7.9 | %) |  |  | 1,100 |  |  | 225.4 | %
Unallocated Amounts |  |  | 623 |  |  | N/A |  |  |  | (1,252 | ) |  | N/A |  |  |  | 1,875 |  |  | 149.8 | %
Total Company |  | $ | 65,485 |  |  | 19.4 | % |  | $ | 62,912 |  |  | 19.9 | % |  | $ | 2,573 |  |  | 4.1 | %

Companion Animal Group. The following table presents CAG operating expenses by functional area:

Operating Expenses (dollars in thousands) |  | For the Three Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Three Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
Sales and marketing |  | $ | 51,932 |  |  | 18.3 | % |  | $ | 45,110 |  |  | 17.2 | % |  | $ | 6,822 |  |  | 15.1 | %
General and administrative |  |  | 32,067 |  |  | 11.3 | % |  |  | 28,965 |  |  | 11.0 | % |  |  | 3,102 |  |  | 10.7 | %
Research and development |  |  | 15,649 |  |  | 5.5 | % |  |  | 13,832 |  |  | 5.3 | % |  |  | 1,817 |  |  | 13.1 | %
Total operating expenses |  | $ | 99,648 |  |  | 35.1 | % |  | $ | 87,907 |  |  | 33.5 | % |  | $ | 11,741 |  |  | 13.4 | %

The increase in sales and marketin g expense re sulted primarily from higher personnel-related costs associated with expanding and transitioning our sales force that represen ted either in-house or reference laboratory diagnostics to account representatives who represent all CAG diagnostic modalities. T he increase in general and administrative expense resulted primarily from increased per sonnel-related costs and an increase in costs attributable to investments in information techno logy. The i ncrease in research and development expense resulted primarily from increased personnel-related costs and higher consulting and external development costs.

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Water. The following table presents Water operating expenses by functional area:

Operating Expenses (dollars in thousands) |  | For the Three Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Three Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
Sales and marketing |  | $ | 2,443 |  |  | 10.5 | % |  | $ | 2,233 |  |  | 10.0 | % |  | $ | 210 |  |  | 9.4 | %
General and administrative |  |  | 2,114 |  |  | 9.1 | % |  |  | 1,552 |  |  | 7.0 | % |  |  | 562 |  |  | 36.2 | %
Research and development |  |  | 627 |  |  | 2.7 | % |  |  | 576 |  |  | 2.6 | % |  |  | 51 |  |  | 8.9 | %
Total operating expenses |  | $ | 5,184 |  |  | 22.3 | % |  | $ | 4,361 |  |  | 19.6 | % |  | $ | 823 |  |  | 18.9 | %

The increase in sales and marketing and general and administrative expenses resulted primarily from higher personnel-related costs. Research and development expense for the three months ended September 30, 2013 was generally consistent with the same period of the prior year.

Livestock, Poultry and Dairy. The following table presents LPD operating expenses by functional area:

Operating Expenses (dollars in thousands) |  | For the Three Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Three Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
Sales and marketing |  | $ | 5,071 |  |  | 20.2 | % |  | $ | 4,151 |  |  | 16.8 | % |  | $ | 920 |  |  | 22.2 | %
General and administrative |  |  | 3,945 |  |  | 15.7 | % |  |  | 3,385 |  |  | 13.7 | % |  |  | 560 |  |  | 16.5 | %
Research and development |  |  | 2,999 |  |  | 11.9 | % |  |  | 3,223 |  |  | 13.1 | % |  |  | (224 | ) |  | (7.0 | %)
Total operating expenses |  | $ | 12,015 |  |  | 47.8 | % |  | $ | 10,759 |  |  | 43.6 | % |  | $ | 1,256 |  |  | 11.7 | %

The increase in sales and marketin g expenses resulted primarily from higher personnel related costs, in part due to costs associated with the acquisition of a Brazilian distributor, as described in Note 4 to the condensed consolidated financial statements included in this Quarterly Report on 10-Q. The increase in general and administrative expenses resulted primarily from transaction and integra tion expenses associated with the acquisition of the Brazilian distributor and higher personnel related costs. The decr ease in research and development expense resulted primarily from lower consulting costs and a decrease in personnel-related costs.

Other. Operating expenses for Oth er decreased $0.7 million to $2.4 million for the three months ended September 30, 2013 as compared to the same period of the prior year due primarily to lower personnel-related costs.

Unallocated Amounts. Operating expenses that are not allocated to our operating segments decreased $0.5 million to $1.1 million for the three months ended September 30, 2013 as compared to the same period of the prior year due primari ly to a decrease in certain personnel-related costs. We estimate certain personnel-related costs and allocate the estimated expenses to the operating segments. This allocation differs from actual expense and consequently yields a difference that is reported under the caption “Unallocated Amounts.” The decrease in certain personnel-related costs for Unallocated Amounts is due primarily to lower self-insured health care costs during the three months ended September 30, 2013 compared to the same period of the prior year.

Interest Income and Interest Expense

Interest income was $0.5 million for both the three months ended September 30, 2013 and 2012.

Interest expense increased $0.6 million to $1.5 million for the three months ended September 30, 2013 due primarily to higher average balances outstanding on our unsecured revolving credit facility. In May 2013, we refinanced our existing $300 million unsecured revolving credit facility by entering into an amended and restated credit agreement relating to a five-year unsecured revolving credit facility in the principal am ount of $450 million as more fully described under the heading “Item 1. Financial Statements; Notes to Condensed Consolida ted Financial Statements; Note 10” in this Quarterly Report on Form 10-Q.

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Provision for Income Taxes

Our effective income tax rate was 29.1% for the three months ended September 30, 2013 compared to 31.4% for the three months ended September 30, 2012. On January 2, 2013, U.S. federal legislation was enacted that retroactively allowed a research and development (“R&D”) tax credit for all of 2012 and extended the R&D tax credit through the twelve months ending December 31, 2013. For the three months ended September 30, 2012, the U.S. legislation authorizing the R&D tax credit had expired and no associated tax benefit was recognized within this period. The decrease in our effective income tax rate for the three months ended September 30, 2013 as compared to the same period of the prior year was due primarily to tax benefits realized in the 2013 period resulting from the R&D tax credit and the resolution of an international audit, which resulted in a reduction in our provision for uncertain tax positions.

Nine Months En ded September 30, 2013 Compared to Nine Months Ended September 30, 2012

Revenue

The following revenue analysis and discussion focuses on organic revenue growth. Organic revenue growth should be considered in addition to, and not as a replacement for or as a superior measure to, revenues reported in accordance with U.S. GAAP, and may not be comparable to similarly titled measures reported by other companies. Management believes that reporting organic revenue growth provides useful information to investors by facilitating easier comparisons of our revenue performance with prior and future periods and to our peers. We exclude the effect of changes in foreign currency exchange rates because changes in foreign currency exchange rates are not under management’s control, are subject to volatility and can obscure underlying business trends. We exclude the effect of acquisitions because the nature, size and number of acquisitions can vary dramatically from period to period and therefore can also obscure underlying business trends.

Organic revenue growth and the percentage changes in revenue from currency and acquisitions are non-U.S. GAAP measures. See the subsection above titled “Effects of Certain Factors on Results of Operations - Currency Impact” for a description of the calculation of the percentage change in revenue resulting from changes in foreign currency exchange rates. The percentage change in revenue resulting from acquisitions represents incremental revenues attributable to acquisitions that have occurred since the beginning of the prior year period.

Total Company. The following table presents revenue by operating segment:

Net Revenue (dollars in thousands) |  | For the Nine Months Ended September 30, 2013 |  | For the Nine Months Ended September 30, 2012 |  | Dollar Change |  | Percentage Change |  | Percentage Change from Currency |  | Percentage Change from Acquisitions |  | Organic Revenue Growth
CAG |  | $ | 856,617 |  | $ | 808,724 |  | $ | 47,893 |  | 5.9 | % |  | (0.8 | %) |  | 0.3 | % |  | 6.4 | %
Water |  |  | 66,297 |  |  | 63,788 |  |  | 2,509 |  | 3.9 | % |  | (0.6 | %) |  | - |  |  | 4.5 | %
LPD |  |  | 81,448 |  |  | 82,413 |  |  | (965 | ) | (1.2 | %) |  | 0.1 | % |  | 0.8 | % |  | (2.1 | %)
Other |  |  | 18,623 |  |  | 18,875 |  |  | (252 | ) | (1.3 | %) |  | 0.1 | % |  | - |  |  | (1.4 | %)
Total Company |  | $ | 1,022,985 |  | $ | 973,800 |  | $ | 49,185 |  | 5.1 | % |  | (0.7 | %) |  | 0.4 | % |  | 5.4 | %

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Companion Animal Group. The following table presents revenue by product and service category for CAG, with the exception of the VetLab instruments, consumables, and service and accessories categories, which represent VetLab subcomponents:

Net Revenue (dollars in thousands) |  | For the Nine Months Ended September 30, 2013 |  | For the Nine Months Ended September 30, 2012 |  | Dollar Change |  | Percentage Change |  | Percentage Change from Currency |  | Percentage Change from Acquisitions |  | Organic Revenue Growth
VetLab instruments |  | $ | 55,622 |  | $ | 65,553 |  | $ | (9,931 | ) | (15.1 | %) |  | (1.1 | %) |  | - |  |  | (14.0 | %)
VetLab consumables |  |  | 229,805 |  |  | 206,398 |  |  | 23,407 |  | 11.3 | % |  | (0.8 | %) |  | - |  |  | 12.1 | %
VetLab service and accessories |  |  | 38,225 |  |  | 35,614 |  |  | 2,611 |  | 7.3 | % |  | (2.8 | %) |  | - |  |  | 10.1 | %
Rapid assay products |  |  | 133,182 |  |  | 128,556 |  |  | 4,626 |  | 3.6 | % |  | (0.7 | %) |  | - |  |  | 4.3 | %
Reference laboratory diagnostic and consulting services |  |  | 333,857 |  |  | 309,696 |  |  | 24,161 |  | 7.8 | % |  | (0.7 | %) |  | 0.2 | % |  | 8.3 | %
Customer information management and digital imaging systems |  |  | 65,926 |  |  | 62,907 |  |  | 3,019 |  | 4.8 | % |  | (0.2 | %) |  | 3.2 | % |  | 1.8 | %
Net CAG revenue |  | $ | 856,617 |  | $ | 808,724 |  | $ | 47,893 |  | 5.9 | % |  | (0.8 | %) |  | 0.3 | % |  | 6.4 | %

The decrease in VetLab instruments revenue was due primarily to a decrease in hematology placements and, to a lesser extent, Catalyst Dx placements. Lower instrument revenue was also due to the impact of customer programs, including a reagent rental program that was launched in the fourth quarter of 2012, where instrument revenue is recognized over the term of the rental agreement instead of at the time we place the instrument.

VetLab consumables revenue growth was due to both higher unit volumes and higher realized prices. The increase in unit volumes resulted primarily from growth of our installed base for our Catalyst Dx and ProCyte Dx instruments as a result of customer acquisitions, as well as an increase in testing from existing customers who upgraded to these instruments, partially offset by lower sales of consumables used with our VetTest chemistry instrument. Higher realized prices include the impact of list price increases, as well as higher prices charged as a result of changes in certain distributor arrangements. The impact of changes in distributors’ inventory levels reduced reported consumables revenue growth by approximately 2%.

VetLab service and accessories revenue growth was primarily a result of the increase in our active installed base of instruments.

The increase in rapid assay product revenue was due primarily to an increase in canine practice-level sales volumes and higher average unit sales prices resulting from price increases. The impact of changes in distributors’ inventory levels did not have a significant impact on revenue growth.

The increase in reference laboratory diagnostic and consulting services revenue resulted from the impact of both increased testing volumes and price increases. Higher testing volumes were driven by the acquisition of new customers and increased testing volumes from existing customers.

The decrease in customer information management and digital imaging systems revenue resulted primarily from a decrease in digital radiography system placements and, to a lesser extent, Cornerstone® s ystem placements. These unfavorable factors were partly offset by higher support revenue due to an increase in our active installed base an d revenue from Pet Health Network® Pro, which launched commercially in the first quarter of 2013.

Water. The increase in Water revenue resulted primarily from higher Colilert product and related accessories sales volumes in North America, Latin America and Europe.

Livestock, Poultry and Dairy. The decrease in LPD revenue resulted primarily from lower sales volumes of BSE tests resulting from changes in European Union testing requirements and lower sales volumes of our Dairy SNAP® tests used for the detection of the contaminant Aflatoxin M1 and antibiotic residues in milk. In early 2012, Dairy SNAP® sales volumes were favorably impacted by testing as a result of an Aflatoxin M1 outbreak in China. Testing volumes in China subside d over the remainder of 2012. These unfavorable factors were partly offset by increased sales volume of certain swine tests.

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Other. The decrease in Other revenue was attributable primarily to lower sales volumes associated with our pharmaceutical product line, partly offset by higher sales volumes of consumables used with our OPTI Medical instruments and milestone and royalty revenue from our pharmaceutical out-licensing arrangements.

Gross Profit

Total Company. The following table presents gross profit and gross profit percentages by operating segment:

Gross Profit (dollars in thousands) |  | For the Nine Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Nine Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
CAG |  | $ | 464,301 |  |  | 54.2 | % |  | $ | 425,867 |  |  | 52.7 | % |  | $ | 38,434 |  |  | 9.0 | %
Water |  |  | 44,136 |  |  | 66.6 | % |  |  | 42,250 |  |  | 66.2 | % |  |  | 1,886 |  |  | 4.5 | %
LPD |  |  | 44,270 |  |  | 54.4 | % |  |  | 49,801 |  |  | 60.4 | % |  |  | (5,531 | ) |  | (11.1 | %)
Other |  |  | 9,235 |  |  | 49.6 | % |  |  | 8,151 |  |  | 43.2 | % |  |  | 1,084 |  |  | 13.3 | %
Unallocated Amounts |  |  | 5,511 |  |  | N/A |  |  |  | 4,029 |  |  | N/A |  |  |  | 1,482 |  |  | 36.8 | %
Total Company |  | $ | 567,453 |  |  | 55.5 | % |  | $ | 530,098 |  |  | 54.4 | % |  | $ | 37,355 |  |  | 7.0 | %

Companion Animal Group. Gross profit for CAG increased due to higher sales and an increase in the gross profit percentage to 54% from 53%. The increase in gross profit percentage was due primarily to price increases for both our reference laboratory diagnostic and consulting services and VetLab consumables, efficiencies realized throughout our reference laboratory operations and a combination of lower relative sales of low margin VetLab instruments and higher relative sales of VetLab consumables that yield higher margins.

Water. Gross profit for Water increased due to higher sales and an increase in the gross profit percentage to 67% from 66%. The increase in the gross profit percentage was due primarily to higher relative sales of our Colilert product s in geographies where these products are sold at higher average unit sales prices.

Livestock, Poultry and Dairy. Gross profit for LPD decreased due to a decrease in the gross profit percentage to 54% from 60% and lower sales. The decrease in the gross profit percentage was due primarily to higher overall manufacturing costs, due primarily to lower production volumes in certain product lines and an increase in materials costs, and the unfavorable impact of curre ncy. The unfavorable impact of currency was due primarily to hedging losses during the nine months ended September 30, 2013 compared to hedging gains during the same period of the prior year.

Other. Gross profit for Other increased due to an increase in the gross profit percentage to 50% from 43%, partly offset by lower sales. The increase in the gross profit percentage was due to a decrease in OPTI Medical manufacturing costs resulting from a reduction in materials cost and higher relative milestone and royalty revenue from our remaining pharmaceutical out-licensin g arrangements, which yield higher margins.

Unallocated Amounts. Gross profit for Unallocated Amounts increased due to changes in certain currency exchange rates. In certain geographies where w e maintain inventories in currencies other than the U.S. dollar, the product costs reported in our operating segments include our standard cost for products sold stated at the budgeted currency exchange rate from the beginning of the fiscal year, which is used to establish our standard cost for products sold. In these geographies, the variances from standard cost for products sold related to changes in currency exchange rates are reported within the caption “Unallocated Amounts”. For th e nine months ended September 3 0, 2013, these variances were due primarily to the cost of product sold in Japan.

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Operating Expenses and Operating Income

Total Company. The following tables present operating expenses and operating income by operating segment:

Operating Expenses (dollars in thousands) |  | For the Nine Months Ended September 30, 2013 |  |  | Percent of Revenue |  | For the Nine Months Ended September 30, 2012 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
CAG |  | $ | 296,924 |  |  | 34.7 | % |  | $ | 268,530 |  |  | 33.2 | % |  | $ | 28,394 |  |  | 10.6 | %
Water |  |  | 15,454 |  |  | 23.3 | % |  |  | 13,631 |  |  | 21.4 | % |  |  | 1,823 |  |  | 13.4 | %
LPD |  |  | 35,094 |  |  | 43.1 | % |  |  | 34,238 |  |  | 41.5 | % |  |  | 856 |  |  | 2.5 | %
Other |  |  | 7,347 |  |  | 39.5 | % |  |  | 8,465 |  |  | 44.8 | % |  |  | (1,118 | ) |  | (13.2 | %)
Unallocated Amounts |  |  | 7,200 |  |  | N/A |  |  |  | 6,098 |  |  | N/A |  |  |  | 1,102 |  |  | 18.1 | %
Total Company |  | $ | 362,019 |  |  | 35.4 | % |  | $ | 330,962 |  |  | 34.0 | % |  | $ | 31,057 |  |  | 9.4 | %

Operating Income (dollars in thousands) |  | For the Nine Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Nine Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
CAG |  | $ | 167,377 |  |  | 19.5 | % |  | $ | 157,337 |  |  | 19.5 | % |  | $ | 10,040 |  |  | 6.4 | %
Water |  |  | 28,682 |  |  | 43.3 | % |  |  | 28,619 |  |  | 44.9 | % |  |  | 63 |  |  | 0.2 | %
LPD |  |  | 9,176 |  |  | 11.3 | % |  |  | 15,563 |  |  | 18.9 | % |  |  | (6,387 | ) |  | (41.0 | %)
Other |  |  | 1,888 |  |  | 10.1 | % |  |  | (314) |  |  | (1.7 | %) |  |  | 2,202 |  |  | 701.3 | %
Unallocated Amounts |  |  | (1,689 | ) |  | N/A |  |  |  | (2,069 | ) |  | N/A |  |  |  | 380 |  |  | 18.4 | %
Total Company |  | $ | 205,434 |  |  | 20.1 | % |  | $ | 199,136 |  |  | 20.4 | % |  | $ | 6,298 |  |  | 3.2 | %

Companion Animal Group. The following table presents CAG operating expenses by functional area:

Operating Expenses (dollars in thousands) |  | For the Nine Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Nine Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
Sales and marketing |  | $ | 154,765 |  |  | 18.1 | % |  | $ | 140,713 |  |  | 17.4 | % |  | $ | 14,052 |  |  | 10.0 | %
General and administrative |  |  | 94,858 |  |  | 11.1 | % |  |  | 86,235 |  |  | 10.7 | % |  |  | 8,623 |  |  | 10.0 | %
Research and development |  |  | 47,301 |  |  | 5.5 | % |  |  | 41,582 |  |  | 5.1 | % |  |  | 5,719 |  |  | 13.8 | %
Total operating expenses |  | $ | 296,924 |  |  | 34.7 | % |  | $ | 268,530 |  |  | 33.2 | % |  | $ | 28,394 |  |  | 10.6 | %

The increase in sales and marketing expense resulted primarily from higher personnel-related costs associated with expanding and transitioning our sales force that represented either in-house or reference laboratory diagnostics to account representatives who represent all CAG diagnostic modalities. The increase in general and administrative expense resulted primarily from increased personnel-related costs and an increase in costs attributable to investments in information technolog y. The increase in research and development expense resulted primarily from increased personnel-related costs and higher consulting and external develo pment costs.

Water. The following table presents Water operating expenses by functional area:

Operating Expenses (dollars in thousands) |  | For the Nine Months Ended September 30, 201 3 |  |  | Percent of Revenue |  | For the Nine Months Ended September 30, 201 2 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
Sales and marketing |  | $ | 7,262 |  |  | 11.0 | % |  | $ | 7,116 |  |  | 11.2 | % |  | $ | 146 |  |  | 2.1 | %
General and administrative |  |  | 6,298 |  |  | 9.5 | % |  |  | 4,658 |  |  | 7.3 | % |  |  | 1,640 |  |  | 35.2 | %
Research and development |  |  | 1,894 |  |  | 2.9 | % |  |  | 1,857 |  |  | 2.9 | % |  |  | 37 |  |  | 2.0 | %
Total operating expenses |  | $ | 15,454 |  |  | 23.3 | % |  | $ | 13,631 |  |  | 21.4 | % |  | $ | 1,823 |  |  | 13.4 | %

Sales and marketing and research and development expense for the nine months ended September 30, 2013 were generally consistent with the same period of the prior year. The increase in general and administrative expense resulted primarily from higher personnel-related costs.

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Livestock, Poultry and Dairy. The following table presents LPD operating expenses by functional area:

Operating Expenses (dollars in thousands) |  | For the Nine Months Ended September 30, 2013 |  |  | Percent of Revenue |  | For the Nine Months Ended September 30, 2012 |  |  | Percent of Revenue |  | Dollar Change |  |  | Percentage Change
Sales and marketing |  | $ | 14,953 |  |  | 18.4 | % |  | $ | 14,137 |  |  | 17.2 | % |  | $ | 816 |  |  | 5.8 | %
General and administrative |  |  | 10,855 |  |  | 13.3 | % |  |  | 10,684 |  |  | 13.0 | % |  |  | 171 |  |  | 1.6 | %
Research and development |  |  | 9,286 |  |  | 11.4 | % |  |  | 9,417 |  |  | 11.4 | % |  |  | (131 | ) |  | (1.4 | %)
Total operating expenses |  | $ | 35,094 |  |  | 43.1 | % |  | $ | 34,238 |  |  | 41.5 | % |  | $ | 856 |  |  | 2.5 | %

The increase in sales and marketing ex pense resulted primarily from higher personnel-related costs and increased spending on promotional activities in the Asia Pacific Region. The increases in g eneral and administrative expense associated with the acquisition of a Brazilian distributor, including transaction and integration expenses, were largely offset by lower personnel-related costs and a decrease in intangible asset amortization. R esearch and development expense for the nine mont hs ended September 30, 2013 was generally consisten t with the same period of the prior year.

Other. Operating expenses for Other d ecreased $1.1 million to $7.3 million for the nine months ended September 30, 2013 as compared to the same period of the prior year due primarily to a decrease in personnel-related costs.

Unallocated Amounts. Operating expenses that are not allocated to our operating segments increased $1.1 million to $7.2 million for t he nine months ended September 30, 2013 as compared to the same period of the prior year due primarily to losses incurred resulting from the bankruptcy of a freight payment and audit service provider (“freight service company”), partly offset by lower legal and other professional fees incurred as result of the resolution of the FTC investigation in February 2013 and proceeds received during the nine months ended September 30, 2013 in connection with the demutualization of an insurance provider. On March 25, 2013, the freight service company provided notice to us that all freight payment services would cease immediately and that certain amounts paid by us to the freight service company were not subsequently remitted to our freight carriers due to an employee fraud and a breakdown in internal controls, both at the freight service company, concluding in significant losses and the resulting bankruptcy. In response, we recorded a $3.9 million loss related to these unremitted amounts in general and administrative expense during the nine months ended September 30, 2013. We continue to monitor the freight service company’s bankruptcy proceeding, but we cannot be certain of any recovery at this time.

The increase in operating expenses that are not allocated to our operating segments was further offset by lower personnel-related costs related to unallocated corporate support function expenses. With respect to personnel-related costs, we estimate certain personnel-related costs and allocate the estimated expenses to the operating segments. This allocation differs from actual expense and consequently yields a difference that is reported under the caption “Unallocated Amounts.”

Interest Income and Interest Expense

Interest income was $1.3 million for the nine months ended September 30, 2013 compared to $1.4 million for the same period of the prior year.

Interest expense increased $0.5 million to $3.5 million for the nine months ended September 30, 2013 due primarily to higher average balances outstanding on our unsecured revolving credit facility. In May 2013, we refinanced our existing $300 million unsecured revolving credit facility by entering into an amended and restated credit agreement relating to a five-year unsecured revolving credit facility in the principal a mount of $450 million as more fully described under the heading “Item 1. Financial Statements; Notes to Condensed Consolidated Financial Statements; Note 10” in this Quarterly Report on Form 10-Q.

Provision for Income Taxes

Our effective income tax rate w as 2 8.9% for the nine months ended September 30, 2013 compared to 31.7% for the nine months ended September 30, 2012. On January 2, 2013, U.S. federal legislation was enacted that retroactively allowed a R&D tax credit for all of 2012 and extended the R&D tax credit through the twelve months ending December 31, 2013. For the nine months ended September 30, 2012, the U.S. legislation authorizing the R&D tax credit had expired and no associated tax benefit was recognized within this period. The decrease in our effective income tax rate for the nine months ended September 30, 2013 as compared to the same period of the prior year was due primarily to the R&D tax credit. Because the related legislation was enacted in 2013, the full benefit of the R&D tax credit related to the prior year’s activities was recognized during the three months ended March 31, 2013.

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§ | Recent Accounting Pronouncements

A discussion of recent accounting pronouncements is included in Note 2 to the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q.

§ | Liquidity and Capital Resources

Liquidity

We fund the capital needs of our business through cash on hand, funds generated from operations, and amounts available under our unsecured revolving c redit f acility. At September 30, 2013 and December 31, 2012, we had $264.8 million and $224.0 million, respectively, of cash and cash equivalents, and working capital of $3 2.3 million and $163.2 million, respectively. Additionally, at September 30, 2013, we had remaining borrowing availability of $51.8 million under our $450 million unsecured revolving c redit f acility. We believe that, if necessary, we could obtain additional borrowings at prevailing market interest rates to fund our growth objectives. We further believe that current cash and cash equivalents, funds generated from operations, and available borrowings will be sufficient to fund our operations, capital purchase requirements, and strategic growth needs for the next twelve months, and that these resources will be sufficient in the long term to fund our business as currently conducted.

We consider the majority of the operating earnings of certain non-U.S. subsidiaries to be indefinitely invested outside the U.S. No provision has been made for the payment of U.S. federal and state, or international taxes that may result from future remittances of these undistributed earnings of non-U.S. subsidiaries. Changes to this position could have adverse tax consequences. A determination of related tax liability that would be paid on these undistributed earnings if eventually repatriated is not practicable. We manage our worldwide cash requirements considering available funds among all of our subsidiaries. Our foreign cash balances are generally available without restrictions to fund ordinary business operations outside the U.S. Of our total cash and cash equivalents at September 30, 2013, approximately $263.2 million was held by our foreign subsidiaries and was subject to material repatriation tax effects. The amount of cash and cash equivalents held by foreign subsidiaries subject to other restrictions on the free flow of funds (primarily securing various obligations) was approximately $1.4 million. As of September 30, 2013, 30% of the cash and cash equivalents held by our foreign subsidiaries was invested in money market funds restricted to U.S. government and agency securities, 4 5% was held as bank deposits, and 25% was invested in money market funds having investments in highly liquid investment-grade fixed-income securities. As of September 30, 2013, approximately 57% of the cash and cash equivalents held by our foreign subsidiaries was held in U.S. dollars.

Should we require more capital in the U.S. than is generated by our operations domestically, for example to fund significant discretionary activities, we could elect to repatriate future earnings from foreign jurisdictions or raise capital in the U.S. through debt or equity issuances. These alternatives could result in higher effective tax rates, increased interest expense, or other dilution of our earnings. We have borrowed funds domestically and continue to have the ability to borrow funds domestically at reasonable interest rates.

The following table presents additional key information concerning working capital:

|  | For the Three Months Ended
|  | September 30, 2013 |  | June 30, 2013 |  | March 31, 2013 |  | December 31, 2012 |  | September 30, 2012
Days sales outstanding(1) |  |  | 41.9 |  |  | 41.2 |  |  | 40.8 |  |  | 39.9 |  |  | 41.7
Inventory turns(2) |  |  | 1.7 |  |  | 1.7 |  |  | 1.7 |  |  | 1.8 |  |  | 1.7
(1) Days sales outstanding represents the average of the accounts receivable balances at the beginning and end of each quarter divided by revenue for that quarter, the result of which is then multiplied by 91.25 days.
(2) Inventory turns represents inventory-related cost of product revenue for the 12 months preceding each quarter-end divided by the inventory balance at the end of the quarter.

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Sources and Uses of Cash

The following table presents cash provided (used):

|  | For the Nine Months Ended September 30, |  |  |  |
(dollars in thousands) |  | 2013 |  | 2012 |  | Dollar Change |
Net cash provided by operating activities |  | $ | 179,729 |  | $ | 153,488 |  | $ | 26,241 |
Net cash used by investing activities |  |  | (68,232 | ) |  | (41,085 | ) |  | (27,147 | )
Net cash used by financing activities |  |  | (69,396 | ) |  | (75,496 | ) |  | 6,100 |
Net effect of changes in exchange rates on cash |  |  | (1,276 | ) |  | 639 |  |  | (1,915 | )
Net increase in cash and cash equivalents |  | $ | 40,825 |  | $ | 37,546 |  | $ | 3,279 |

Operating Activities. Cash provided by operating activities was $179.7 million for the nine months ended September 30, 2013 as compared to $153.5 million for the same period of the prior year. The total of net income and net non-cash charges, excluding the impact of reclassifying the tax benefit from share based compensation arrangements to a financing activity, was $198.6 million for the nine months ended September 30, 2013 compared to $184.4 million for the same period in 2012, resulting in incremental operating cash flows of $14.2 million driven primarily by the increase in net income. The total of changes in operating assets and liabilities and the tax benefit from share-based compensation arrangements decreased cash by $18.9 million and $31.0 million for the nine months ended September 30, 2013 and 2012, respectively, resulting in an incremental increase in cash of $12.0 million.

The following table presents cash flows from changes in operating assets and liabilities and the tax benefit from share-based compensation arrangements:

| For the Nine Months Ended September 30, |  |  |  |
(dollars in thousands) |  | 2013 |  | 2012 |  | Dollar Change |
Accounts receivable |  | $ | (12,795 | ) | $ | 255 |  | $ | (13,050 | )
Inventories |  |  | (6,360 | ) |  | (18,078 | ) |  | 11,718 |
Other assets |  |  | 4,717 |  |  | 539 |  |  | 4,178 |
Accounts payable |  |  | 2,184 |  |  | (4,893 | ) |  | 7,077 |
Accrued liabilities |  |  | (3,269 | ) |  | (3,751 | ) |  | 482 |
Deferred revenue |  |  | 4,050 |  |  | 5,151 |  |  | (1,101 | )
Tax benefit from share-based compensation arrangements |  |  | (7,438 | ) |  | (10,182 | ) |  | 2,744 |
Total change in cash due to changes in operating assets and liabilities and the tax benefit from share-based compensation arrangements |  | $ | (18,911 | ) | $ | (30,959 | ) | $ | 12,048 |

The in crease in cash used for purchasing inventories during the nine months ended September 30, 2013 was less than the same period of the prior year due primarily to the timing of inventory receipts during the nine months ended September 30, 2012. Incremental cash provided by accounts payable during the nine months ended September 30, 2013 was due primarily to the timing of vendor payments during the nine months ended September 30, 2013 as compared to the same period of the prior year. The incremental cash provided by other assets during the nine months ended September 30, 2013 was due primarily to a $6.3 million royalty prepayment to a licensor during the nine months ended September 30, 2012. The increase in accounts receivable during the nine months ended September 30, 2013 was greater than the increase during the same period of the prior year due primarily to higher revenues in the last month of the quarter ended September 30, 2013 as compared to the same period of the prior year and the timing of customer payments.

We historically have experienced proportionally lower net cash flows from operating activities during the first quarter and proportionally higher cash flows from operating activities for the remainder of the year and for the annual period driven primarily by the payment of annual bonuses in connection with employee incentive programs in the first quarter following the year for which the bonuses were earned and the seasonality of vector-borne disease testing, which has historically resulted in significant increases in accounts receivable balances during the first quarter of the year.

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Investing Activities. Cash used by investing activities was $68.2 million for the nine months ended September 30, 2013 as compared to $41.1 million for the same period of the prior year. The increase in cash used by investing activities during the nine months ended September 30, 2013 as compared to the same period of the prior year was due primarily to incremental purchases of property and equipment and the acquisition of a Brazilian distributor. The incremental purchases of property and equipment were primarily related to investments to expand our headquarters facility in Westbrook, Maine and, to a lesser extent, our investments in manufacturing equipment. Our acquisition of the Brazilian distributor is described in Note 4 to the condensed consolidated financial statements included in this Quarterly Report on 10-Q.

Our total capital expenditure plan for 2013 is estimated to be approximately $90 million, which includes the expansion of our headquarters facility in Westbrook, Maine, investments in software for internal use and information technology infrastructure, capital investments in manufacturing equipment and investments in our reference laboratory equipment and facilities.

Financing Activities. Cash used by financing activities was $69.4 million for the nine months ended September 30, 2013 as compared to $75.5 million for the same period in 2012. The incremental cash provided by financing activities was due primarily to an increase in net borrowings under the Credit Facility, partly offset by an increase in cash used to repurchase common stock.

Cash used to repurchase shares of our common stock increased by $191.8 million during the nine months ended September 30, 2013 as compared to the same period of the prior year. From the inception of our share repurchase program in August 1999 to September 30, 2013, we have repurchased 48.2 million shares. During the nine months ended September 30, 2013, we purchased 3.1 million shares for an aggregate cost of $282.9 million compared to purchases of 1.0 million shares for an aggregate cost of $91.2 million during the nine months ended September 30, 2012. We believe that the repurchase of our common stock is a favorable means of returning value to our shareholders and we also repurchase to offset the dilutive effect of our share-based compensation programs. Repurchases of our common stock may vary depending upon the level of other investing activities and the share price. See Note 1 1 to the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q for additional information about our share repurchases.

In May 2013, we refinanced our existing $300 million unsecured revolving credit facility by entering into an amended and restated credit agreement relating to a five-year unsecured revolving credit facility in the principal amount of $450 million with a syndicate of multinational banks, which matures on May 8, 2018 (the new credit facility and the previous credit facility are referred to collectively as the “Credit Facility”) and requires no scheduled prepayments before that date. Though the Credit Facility does not mature until May 8, 2018, all amounts borrowed under the terms of the Credit Facility are reflected in the current liabilities section in the accompanying condensed consolidated balance sheets because the Credit Facility contains a subjective material adverse event clause, which allows the debt holders to call the loans under the Credit Facility if we fail to notify the syndicate of such an event. Applicable interest rates on borrowings under the Credit Facility generally range from 0.875 to 1.25 percentage points (“Credit Spread”) above the London interbank offered rate or the Canadian Dollar-denominated bankers’ acceptance rate, dependent on our leverage ratio, or the prevailing prime rate plus a maximum spread of up to 0.25%, dependent on our leverage ratio.

Net borrowing and repayment activity under our Credit Facility resulted in incremental cash provided of $196.2 million during the nine months ended September 30, 2013 as compared to the same period of the prior year. At September 30, 2013, we had $397.2 million outstanding under the Credit Facility. The general availability of funds under the Credit Facility was further reduced by $1.0 million for a letter of credit issued related to our worker’s compensation policy covering claims for the years ending 2009 through 2013. The obligations under the Credit Facility may be accelerated upon the occurrence of an event of default under the Credit Facility, which includes customary events of default including, without limitation, payment defaults, defaults in the performance of affirmative and negative covenants, the inaccuracy of representations or warranties, bankruptcy and insolvency related defaults, defaults relating to judgments, certain events related to employee pension benefit plans under the Employee Retirement Income Security Act of 1974, the failure to pay specified indebtedness, and a change of control default. The Credit Facility contains affirmative, negative and financial covenants customary for financings of this type. The negative covenants include restrictions on liens, indebtedness of subsidiaries of the Company, fundamental changes, investments, transactions with affiliates and certain restrictive agreements. The financial covenant is a consolidated leverage ratio test that requires our ratio of debt to earnings before interest, taxes, depreciation and amortization not to exceed 3-to-1. At September 30, 2013, we were in compliance with the covenants of the Credit Facility.

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Other Commitments, Contingencies and Guarantees

Significant commitments, contingencies and guarantees at September 30, 2013 are consistent with those discussed in the section under the heading “Part 2, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources,” and in Note 14 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2012.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

For quantitative and qualitative disclosures about market risk affecting IDEXX, see the section under the heading “Part II, Item 7A. Quantitative and Qualitative Disclosures About Market Risk” of our Annual Report on Form 10-K for the year ended December 31, 2012. As of the date of this report, there have been no material changes to the market risks described in our Annual Report on Form 10-K for the year ended December 31, 2012.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

Our management is responsible for establishing and maintaining disclosure controls and procedures, as defined by the Securities and Exchange Commission (the “SEC”) in its Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934 as amended (the “Exchange Act”). The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of an issuer that are designed to ensure that information required to be disclosed by the issuer in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC's rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures at September 30, 2013, our chief executive officer and chief financial officer have concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the three months ended September 30, 2013 that materially affected, or are reasonably likely to materially affect, the Company’s internal contro l over financial reporting.

PART II — OTHER INFORMATION

Item 1. Legal Proceedings

In January 2010, we received a letter from the U.S. Federal Trade Commission (“FTC”), stating that it was conducting an investigation to determine whether IDEXX or others had engaged in unfair methods of competition in violation of Section 5 of the Federal Trade Commission Act (“FTC Act”), through pricing or marketing policies for companion animal veterinary products and services, including but not limited to exclusive dealing or tying arrangements with distributors or end-users of those products or services (the “Investigation”).

On December 5, 2012, we entered into an Agreement Containing Consent Order to Cease and Desist (“Consent Agreement”) with the FTC staff to resolve the Investigation. The Consent Agreement, which is ten years in duration, specifies that IDEXX may have exclusive distribution agreements with two of the following three distributors: MWI Veterinary Supply, Inc. (“MWI”), Butler Schein Animal Health, and Webster Veterinary. The FTC Commissioners granted final approval of the Consent Agreement on February 11, 2013 resulting in the final resolution of the Investigation.

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We continue to believe that our marketing and sales practices for companion animal veterinary products and services do not violate applicable antitrust laws. We have chosen to enter into the Consent Agreement because we believe this course will help us avoid long and costly litigation and that our business will not be materially adversely affected.

From time to time, we are subject to other legal proceedings and claims, which arise in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on our results of operations, financial condition or cash flows.

Item 1A. Risk Factors

Our future operating results involve a number of risks and uncertainties. Actual events or results may differ materially from those discussed in this report. Factors that could cause or contribute to such differences include, but are not limited to, the factors discussed be low, which have been updated to reflect developments subsequent to the discussion of those factors included in our Annual Report on Form 10-K for the year ended December 31, 2012, as well as those factors discussed elsewhere in this report.

Our Failure to Successfully Execute Certain Strategies Could Have a Negative Impact on Our Growth and Profitability

The companion animal healthcare industry is highly competitive and we anticipate increasing levels of competition from both existing competitors and new market entrants. Our ability to maintain or enhance our growth rates and our profitability depends on our successful execution of many elements of our strategy, which include:

· | Developing, manufacturing and marketing innovative new or improved and cost competitive in-clinic laboratory analyzers that drive sales of IDEXX VetLab® instruments, grow our installed base of instruments, and increase demand for related consumable products, services and accessories;

· | Developing and introducing new proprietary diagnostic tests and services that provide valuable medical information to our customers and effectively differentiate our products and services from those of our competitors;

· | Increasing the value to our customers of our companion animal products and services by enhancing the integration of these products and the management of diagnostic information derived from our products;

· | Providing our veterinary customers with the medical and business tools, information and resources that enable them to grow their practices through increased pet visits and enhanced practice of real-time care;

· | Achieving cost improvements in our worldwide network of laboratories by implementing global best practices including lean processing techniques, incorporating technological enhancements including laboratory automation and a global laboratory information management system, employing purchasing strategies to maximize leverage of our global scale, increasing the leverage of existing infrastructure and consolidating testing in high volume laboratory hubs;

· | Achieving cost improvements in the manufacture and service of our in-clinic laboratory analyzers by employing the benefits of economies of scale in both negotiating supply contracts and leveraging manufacturing overhead, and by improving reliability of our instruments;

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· | Achieving productivity improvements in our companion animal diagnostic sales organization in North America by transitioning our specialty sales force that represent either in-house or reference laboratory diagnostics to account representatives who represent the full line of IDEXX diagnostics. We believe we have mitigated our risk of sales force turnover and productivity losses during this transition by adding headcount to our sales force while reducing the size of the geographic territories, providing extensive individualized training and empowering our sales representatives with intuitive sales technologies. We further believe this transition better aligns our sales force with the needs of the veterinary practices resulting in deeper relationships with our customers, improved sales force retention and alignment with our overall diagnostic strategy;

· | Attracting, developing and retaini ng key leadership and talent necessary to support all elements of our strategy;

· | Expanding our served market and growing our market share by strengthening our sales and marketing activities both within the U.S. and in geographies outside of the U.S.;

· | Identifying, completing and integrating acquisitions that enhance our existing businesses or create new business or geographic areas for us; and

· | Developing and implementing new technology and licensing strategies.

If we are unsuccessful in implementing and executing on some or all of these strategies, our rate of growth or profitability may be negatively impacted.

Our Dependence on a Limited Number of Suppliers Could Limit Our Ability to Sell Certain Products or Reduce Our Profitability

We currently purchase many products and materials from sole or single sources. Some of the products that we purchase from these sources are proprietary and, therefore, cannot be readily or easily replaced by alternative sources. These products include our Catalyst Dx® consumables; ProCyte Dx® hematology, IDEXX VetAutoread™ hematology, VetLyte® e lectrolyte, IDEXX VetLab® UA™ urinalysis, VetTest® chemistry, and Coag Dx™ blood coagulation analyzers and relate d consumables and accessories; image capture plates used in our digital radiography systems; and certain components and raw materials used in our SNAP® rapid assay devices, livestock and poultry diagnostic tests, dairy testing products and LaserCyte® and LaserCyte® Dx hematology analyzer s. To mitigate risks associated with sole and single source suppliers, we seek when possible to enter into long-term contracts that ensure an uninterrupted supply of products at predictable prices. However, some suppliers decline to enter into long-term contracts and we are required to purchase products on a purchase order basis. There can be no assurance that suppliers with which we do not have contracts will continue to supply our requirements for products, that suppliers with which we do have contracts will always fulfill their obligations under these contracts, or that any of our suppliers will not experience disruptions in their ability to supply our requirements for products. In cases where we purchase sole and single source products or components under purchase orders, we are more susceptible to unanticipated cost increases or changes in other terms of supply. In addition, under some contracts with suppliers we have minimum purchase obligations and our failure to satisfy those obligations may result in loss of some or all of our rights under these contracts or require us to compensate the supplier. If we are unable to obtain adequate quantities of products in the future from sole and single source suppliers, we may be unable to supply the market, which could have a material adverse effect on our results of operations.

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Our Biologic Products Are Complex and Difficult to Manufacture, Which Could Negatively Affect Our Ability to Supply the Market

Many of our rapid assay, livestock and poultry diagnostic, water and dairy products are biologic products, which are products that include materials from living organisms, such as antibodies, cells and sera. Manufacturing biologic products is highly complex due to the inherent variability of biological input materials and to the difficulty of controlling the interactions of these materials with other components of the products, with samples and with the environment. There can be no assurance that we will be able to maintain adequate sources of biological materials or that we will be able to consistently manufacture biologic products that satisfy applicable product release criteria. Further, products that meet release criteria at the time of manufacture may fall out of specification while in customer inventory, which could necessitate field actions that would require us to incur expenses associated with recalling products and providing customers with new products, and could damage customer relations. Our inability to produce or obtain necessary biological materials or to successfully manufacture biologic products that incorporate such materials could result in our inability to supply the market with these products, which could have a material adverse effect on our results of operations.

A Weak Economy Could Result in Reduced Demand for Our Products and Services or Increased Customer Credit Risk

A substantial percentage of our sales are made worldwide to the companion animal veterinary market. Demand for our companion animal diagnostic products and services is driven in part by the number of patient visits with their respective owners to veterinary hospitals and the practices of veterinarians with respect to the recommendations for diagnostic testing, as well as the pet owner compliance with these recommendations. Economic weakness in our significant markets in recent years has caused and could continue to cause pet owners to skip or defer visits to veterinary hospitals or could affect their willingness to approve certain diagnostic tests, comply with a treatment plan or, even more fundamentally, continue to own a pet. In addition, concerns about the financial resources of pet owners could cause veterinarians to be less likely to recommend certain diagnostic tests and concerns about the economy may cause veterinarians to defer purchasing capital items such as our instruments and systems. A decline in patient visits to the hospital, in the willingness of pet owners to treat certain health conditions or approve certain tests, in pet ownership in general, or in the inclination of veterinarians to recommend certain tests or make capital purchases could result in a decrease in sales of diagnostic products and services, which could have a material adverse effect on our results of operations.

Demand for our water products is driven in part by the availability of funds at the government laboratories, water utilities and private certified laboratories that utilize our products. Availability of funds also affects demand by the government laboratories and cattle, swine and poultry producers that utilize our livestock and poultry diagnostic products, and by users of our human point-of-care diagnostic instruments. Economic weakness in our markets has caused and could continue to cause our customers to reduce their investment in such testing, which could have a material adverse effect on our results of operations.

In all of our markets, a weak economy may also cause deterioration in the financial condition of our distributors and customers, which could inhibit their ability to pay us amounts owed for products delivered or services provided in a timely fashion or at all.

Strengthening of the Rate of Exchange for the U.S. Dollar Has a Negative Effect on Our Business

Any strengthening of the rate of exchange for the U.S. dollar against non-U.S. currencies, and in particular the Euro, British pound, Canadian dollar, Japanese yen and Australian dollar, adversely affects our results, as it reduces the dollar value of sales that are made in those currencies and reduces the profits on products manufactured or sourced in U.S. dollars and exported to international markets. For the three and nine months ended September 30, 2013, approximately 25% and 26%, respectively, of our revenue was derived from products manufactured in the U.S. and sold internationally in local currencies compared to 25% for both the three and nine months ended September 30, 2012. To mitigate such foreign currency exposure, we utilize non-speculative forward currency exchange contracts. A strengthening U.S. dollar could also negatively impact the ability of customers outside the U.S. to pay for purchases denominated in U.S. dollars.

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Various Government Regulations Could Limit or Delay Our Ability to Market and Sell Our Products

In the U.S., the manufacture and sale of our products are regulated by agencies such as the United States Department of Agriculture (“USDA”), the U.S. Food and Drug Administration (“FDA”) and the U.S. Environmental Protection Agency (“EPA”). Our infectious disease diagnostic tests for animal health applications, including most rapid assay canine and feline SNAP® tests and livestock and poultry diagnostic tests, must be approved by the USDA prior to sale in the U.S. Our dairy testing products require approval by the FDA prior to sale in the U.S. Our water testing products must be approved by the EPA before they can be used by customers in the U.S. as a part of a water quality monitoring program required by the EPA. The manufacture and sale of our OPTI® line of human point-of-care electrolytes and blood gas analyzers are regulated by the FDA and these products require approval by the FDA before they may be sold commercially in the U.S. The manufacture and sale of our products are subject to similar and sometimes more stringent laws in many foreign countries. Any failure to comply with legal and regulatory requirements relating to the manufacture and sale of our products in the U.S. or in other countries could result in fines and sanctions against us or suspensions or discontinuations of our ability to manufacture or sell our products, which could have a material adverse effect on our results of operations. In addition, delays in obtaining regulatory approvals for new products or product upgrades could have a negative impact on our growth and profitability.

The Impact of One of Our Distributors Becoming Non-exclusive on Our Results of Operations is Uncertain

On February 11, 2013, the FTC granted final approval of the Agreement Containing Consent Order to Cease and Desist previously reached with the FTC staff to resolve the investigation into whether IDEXX had engaged in unfair methods of competition in violation of Section 5 of the Federal Trade Commission Act. Details about the FTC investigation and the resulting agreement are described above in “Part II, Item 1. Legal Proceedings.”

On September 28, 2012, we entered into a modified agreement with MWI Veterinary Supply, Inc. (“MWI”) that became effective January 1, 2013. Under this modified agreement, MWI is permitted to carry any competitive products without restriction or potential negative consequence. This agreement satisfies the requirements of the Consent Agreement, that we may have exclusive distribution agreements with only two of the three largest U.S. distributors of companion animal veterinary products. The modification of our agreement with MWI has result ed in several of our competitors selling products through MWI, which we expect will add field sales resources of MWI to those of our competitors to sell their products. Under the modified agreement with MWI, we will provide lower compensation to MWI on sales of our products since we will no longer receive the benefits of MWI’s exclusive focus on our products. We have reinvest ed savings from this lower rate of compensation in other direct sales and marketing resource s. We believe that the reallocation of these sales resources will help mitigate the potential effects of the loss of exclusive focus of MWI and the additional field sales resources used by our competitors. However, there can be no assurances that we will be able to fully mitigate the competitive effects of the changes in the nature of our agreement with MWI. Any reduction in the relative effectiveness of our overall selling efforts could have an adverse effect on our results of operations, which we do not believe would be material.

Our Success Is Heavily Dependent Upon Our Proprietary Technologies

We rely on a combination of patent, trade secret, trademark and copyright laws to protect our proprietary rights. If we do not have adequate protection of our proprietary rights, our business may be affected by competitors who utilize substantially equivalent technologies that compete with us.

We cannot ensure that we will obtain issued patents, that any patents issued or licensed to us will remain valid, or that any patents owned or licensed by us will provide protection against competitors with similar technologies. Even if our patents cover products sold by our competitors, the time and expense of litigating to enforce our patent rights could be substantial, and could have a material adverse effect on our results of operations. In addition, expiration of patent rights could result in substantial new competition in the markets for products previously covered by those patent rights.

In the past, we have received notices claiming that our products infringe third-party patents and we may receive such notices in the future. Patent litigation is complex and expensive, and the outcome of patent litigation can be difficult to predict. We cannot ensure that we will win a patent litigation case or negotiate an acceptable resolution of such a case. If we lose, we may be stopped from selling certain products and/or we may be required to pay damages and/or ongoing royalties as a result of the lawsuit. Any such result could have a material adverse effect on our results of operations.

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Distributor Purchasing Patterns Could Negatively Affect Our Operating Results

We sell many of our products, including substantially all of the rapid assays and instrument consumables sold in the U.S., through distributors. Distributor purchasing patterns can be unpredictable and may be influenced by factors unrelated to the end-user demand for our products. In addition, our agreements with U.S. distributors may generally be terminated by the distributors for any reason on 60 days prior written notice. Because significant product sales are made to a limited number of distributors, the unanticipated loss of a distributor or unanticipated changes in the frequency, timing or size of distributor purchases, could have a negative effect on our results of operations.

Distributors of veterinary products have entered into business combinations resulting in fewer distribution companies. Consolidation within distribution channels increases our customer concentration level, which could increase the risks described in the preceding paragraph.

Increased Competition and Technological Advances by Our Competitors Could Negatively Affect Our Operating Results

We face intense competition within the markets in which we sell our products and services and we expect that future competition may become even more intense. Competition could negatively affect our sales and profitability in a number of ways. New competitors may enter our markets and new or existing competitors may introduce new and competitive products and services, which could be superior to our products and services. Some of our competitors and potential competitors may choose to differentiate themselves by offering similar products and services to ours at lower sales prices, which could have a material adverse effect on our results of operations through loss of market share or a decision to lower our own sales prices to remain competitive. In addition, multiple competitors could bundle product and service offerings through co-marketing or other arrangements, which could enhance their ability to compete with our broad product and service offering. Some of our competitors and potential competitors, including large diagnostic and pharmaceutical companies, have substantially greater financial resources than us, and greater experience in manufacturing, marketing, research and development and obtaining regulatory approvals than we do.

Changes in Testing Patterns Could Negatively Affect Our Operating Results

The market for our companion animal, livestock and poultry diagnostic tests and our dairy and water testing products could be negatively impacted by a number of factors impacting testing practices. The introduction or broad market acceptance of vaccines or preventatives for the diseases and conditions for which we sell diagnostic tests and services could result in a decline in testing. Changes in accepted medical protocols regarding the diagnosis of certain diseases and conditions could have a similar effect. Eradication or substantial declines in the prevalence of certain diseases also could lead to a decline in diagnostic testing for such diseases. Our livestock and poultry products business in particular is subject to fluctuations resulting from changes in disease prevalence. In addition, changes in government regulations or in the availability of government funds available for monitoring programs could negatively affect sales of our products that are driven by compliance testing, such as our livestock and poultry, dairy and water products. Declines in testing for any of the reasons described, along with lost opportunities associated with a reduction in veterinary visits, could have a material adverse effect on our results of operations.

Effective January 1, 2009, the age at which healthy cattle to be slaughtered are required to be tested for bovine spongiform encephalopathy (“BSE” or “mad cow disease”) in the European Union was increased from 30 months to 48 months, which reduced the population of cattle tested by approximately 30%. In February 2011, the European Union’s Standing Committee on the Food Chain and Animal Health (“SCFCAH”) agreed to allow its member states to further raise the recommended testing age to 72 months, effective July 1, 2011, which further reduced the population of cattle tested. In December 2012, the SCFCAH agreed to allow European Union member states the option to eliminate BSE testing of healthy cattle at slaughter effective March 2013. The demand for our BSE testing products has been negatively impacted as a result of these regulatory changes and could be further impacted by further changes that could be made in the future. Revenue from BSE testing products was less than $10 million during the twelve months ended December 31, 2012.

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Increase in Corporate Hospital Ownership and Prevalence of Buying Consortiums Could Negatively Affect Our Business

An increasing percentage of veterinary hospitals in the U.S. is owned by corporations that are in the business of acquiring veterinary hospitals and/or opening new veterinary hospitals nationally or regionally. Major corporate hospital owners in the U.S. include Banfield Pet Hospital, VCA Antech, Inc., and National Veterinary Associates, each of which is currently a customer of IDEXX. A similar trend exists in the U.K. and the Nordic countries and may in the future also develop in other countries. Furthermore, an increasing percentage of individually owned veterinary hospitals in the U.S. are participating in buying consortiums. Corporate owners of veterinary hospitals and buying consortiums often seek to improve profitability by leveraging the buying power they derive from their scale to obtain favorable pricing from suppliers, which could have a negative impact on our results of operations. While we have strong supplier relationships with several corporate hospital groups and buying consortiums that we believe are positive for our business, decisions by larger corporate owners and buying consortiums, in particular Banfield Pet Hospital, to shift their purchasing of products and services away from us and to a competitor would have a negative impact on our results of operations, which could be material. In addition, certain corporate owners, most notably VCA Antech, Inc., our primary competitor in the U.S. and Canadian markets for veterinary reference laboratory diagnostic services, also operate reference laboratories that serve both their hospitals and unaffiliated hospitals. Any hospitals acquired by these companies generally use their reference laboratory services almost exclusively and shift a large portion of their testing from in-clinic testing to their reference laboratories. Furthermore, because these companies compete with us in the reference laboratory services marketplace, hospitals acquired by these companies may cease to be customers or potential customers of our other companion animal products and services, which would cause our sales of these products and services to decline.

Our Limited Experience and Small Scale in the Human Point-of-Care Market Could Inhibit Our Success in this Market

We have limited experience in the human point-of-care medical diagnostics market and we operate at a small scale in this market. This market differs in many respects from the veterinary diagnostic market. Significant differences include the impact of third party reimbursement on diagnostic testing, more extensive regulation, greater product liability risks, larger competitors, a more segmented customer base and more rapid technological innovation. Our limited experience and small scale in the human point-of-care medical diagnostics market could negatively affect our ability to successfully manage the risks and features of this market that differ from the veterinary diagnostic market. There can be no assurance that we will be successful in achieving growth and profitability in the human point-of-care medical diagnostics market comparable to the results we have achieved in the veterinary diagnostic market.

Risks Associated with Doing Business Internationally Could Negatively Affect Our Operating Results

For both the three and nine months ended September 30, 2013, approx imately 41% of our revenue was attributable to sales of products and services to customers outside the U.S., which was unchanged from the same period s of the prior year. Various possible risks associated with foreign operations may impact our international sales, including disruptions in transportation of our products, the differing product and service needs of foreign customers, difficulties in building and managing foreign operations, import/export duties and licensing requirements, natural disasters and un expected regulatory and economic or political changes in foreign markets. Further, prices that we charge to foreign customers may be different than the prices we charge for the same products in the U.S. due to competitive, market or other factors. Our results of operations are also susceptible to changes in foreign currency exchange rates. As a result, the mix of domestic and international sales in a particular period could have a material impact on our results of operations for that period.

Our Operations are Vulnerable to Interruption as a Result of Natural and Man-Made Disasters or System Failures

The operation of all of our facilities may be vulnerable to interruption as a result of natural and man-made disasters, interruptions in power supply or other system failures. While we maintain plans to continue business under such circumstances, there can be no assurance that such plans will be successful in fully or partially mitigating the effects of such events.

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We manufacture many of our significant companion animal products, including our rapid assay devices and certain instruments, many of our water testing products and certain of our livestock, poultry and dairy testing products, at a single facility in Westbrook, Maine. Certain of our companion animal products, as well as our human point-of-care products, are manufactured in Roswell, Georgia. We also manufacture certain of our livestock and poultry testing products in Bern, Switzerland and Montpellier, France. In addition, we maintain major distribution facilities in North America and in the Netherlands and major reference laboratories in Memphis, Tennessee; Leipzig, Germany; Ludwigsburg, Germany; Sacramento, California; Elmhurst, Illinois; North Grafton, Massachusetts; East Brisbane, Australia; Markham, Ontario; and Wetherby, the United Kingdom. Therefore, interruption of operations at any of these facilities could have a material adverse effect on our results of operations given our customers expect rapid turnaround times.

We rely on several information systems throughout our company to keep financial records, process customer orders, manage inventory, process shipments to customers and operate other critical functions. If we were to experience a system disruption that impacts any of our critical functions, it could result in the loss of sales and customers, financial misstatement and significant incremental costs, which could adversely affect our business.

We maintain property and business interruption insurance to insure against the financial impact of certain events of this nature. However, this insurance may be insufficient to compensate us for the full amount of any losses that we may incur. In addition, such insurance will not compensate us for the long-term competitive effects of being out of the market for the period of any interruption in operations.

We Could Be Subject to Class Action Litigation Due to Stock Price Volatility, which, if it Occurs, Could Result in Substantial Costs or Large Judgments Against Us

The market for our common stock may experience extreme price and volume fluctuations, which may be unrelated or disproportionate to our operating performance or prospects. Securities class action litigation has often been brought against companies following periods of volatility in the market prices of their securities. We may be the target of similar litigation in the future. Securities litigation could result in substantial costs and divert our management’s attention and resources, which could have a negative effect on our business, operating results and financial condition.

If Our Quarterly or Annual Results of Operations Fluctuate, This Fluctuation May Cause Our Stock Price to Decline, Resulting in Losses to You

Our prior operating results have fluctuated due to a number of factors, including seasonality of certain product lines; changes in our accounting estimates; the impact of acquisitions; timing of distributor purchases, product launches, operating expenditures, marketing programs, changes in foreign currency exchange rates, and litigation and claim-related expenditures; changes in competitors’ product offerings; changes in the economy affecting consumer spending; and other matters. Similarly, our future operating results may vary significantly from quarter to quarter or year to year due to these and other factors, many of which are beyond our control. If our operating results or projections of future operating results do not meet the expectations of market analysts or investors in future periods, our stock price may fall.

Future Operating Results Could Be Negatively Affected by the Resolution of Various Uncertain Tax Positions and by Potential Changes to Tax Incentives

In the ordinary course of our business, there are many transactions and calculations where the ultimate tax determination is uncertain. Significant judgment is required in determining our worldwide provision for income taxes. We periodically assess our exposures related to our worldwide provision for income taxes and believe that we have appropriately accrued taxes for contingencies. Any reduction of these contingent liabilities or additional assessments would increase or decrease income, respectively, in the period such determination was made. Our income tax filings are regularly under audit by tax authorities and the final determination of tax audits could be materially different than that which is reflected in historical income tax provisions and accruals. Additionally, we benefit from certain tax incentives offered by various jurisdictions. If we are unable to meet the requirements of such incentives, or if they expire or are renewed at less favorable terms, our inability to realize these benefits could have a material negative effect on future earnings.

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Restrictions in Our Credit Facility or Our Inability to Obtain Financing on Favorable Terms May Limit Our Activities

Our ability to satisfy our obligations under our unsecured revolving credit facility (“Credit Facility”) depends on our future operating performance and on economic, financial, competitive and other factors beyond our control. Our business may not generate sufficient cash flows to meet these obligations or generate sufficient levels of earnings to satisfy the applicable affirmative, negative and financial covenants. Our failure to comply with these covenants and the other terms of the Credit Facility could result in an event of default and acceleration of our obligations under the Credit Facility, which may require us to seek additional financing or restructure existing debt and possibly on terms not deemed favorable.

We fund our operations, capital purchase requirements and strategic growth needs through cash on hand, funds generated from operations and amounts available under our Credit Facility. If we were unable to obtain financing on favorable terms, we could face restrictions that would limit our ability to execute certain strategies, which could have an adverse effect on our revenue growth and profitability.

Item 2.Unregistered Sales of Equity Securities and Use of Proceeds

During the three months ended September 30, 2013, we repurchased shares of common stock as described below:

Period |  | Total Number of Shares Purchased (a) |  | Average Price Paid per Share (b) |  | Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (c) |  | Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs (d)
July 1 to July 31, 201 3 |  | 234,593 |  | $ | 93.17 |  | 234,550 |  | 4,341,410 |
August 1 to August 31, 201 3 |  | 251,325 |  |  | 96.96 |  | 251,325 |  | 4,090,085 |
September 1 to September 30, 201 3 |  | 316,495 |  |  | 95.98 |  | 315,800 |  | 3,774,285 |
Total |  | 802,413 |  | $ | 95.52 |  | 801,675 |  | 3,774,285 |

Our board of directors has approved the repurchase of up to 52 million shares of our common stock in the open market or in negotiated transactions. The plan was approved and announced on August 13, 1999, and subsequently amended on October 4, 1999, November 16, 1999, July 21, 2000, October 20, 2003, October 12, 2004, October 12, 2005, February 14, 2007, February 13, 2008, February 10, 2010, October 12, 2011 and May 7, 2013. There is no specified expiration date for this repurchase plan. There were no oth er repurchase plans outstanding during the three months ended September 30, 2013, and no repurchase plans expired during the period. Repurchases of 801,675 shares were made during the three months ended September 30, 2013 in transactions made pursuant to our repurchase plan.

During the three months ended September 30, 201 3, we received 738 shares of our common stock that were surrendered by employees in payment for the minimum required withholding taxes due on the vesting of restricted stock units and settlement of deferred stock units. In the above table, these shares are included in columns (a) and (b), but excluded from columns (c) and (d). These shares do not reduce the number of shares that may be purchased under the repurchase plan.

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Item 5. Other Information

As previously disclosed, on February 28, 2013, our Chairman and Chief Executive Officer, Jonathan W. Ayers, established a plan pursuant to Rule 10b5-1 of the Securities Exchange Act of 1934 with respect to stock options that are scheduled to expire on various dates in February 2014. Under the plan, Mr. Ayers may exercise, under pre-arranged terms, options to purchase 363,688 shares of IDEXX common stock and sell a portion of the shares received on exercise.

Of the shares acquired on exercise, Mr. Ayers will retain shares having a value equal to approximately 50% of the spread between the market price of the stock and the option exercise price, after taxes and transaction expenses. He intends to sell the remaining shares to cover the exercise price, transaction expenses and taxes, and to diversify his assets.

The transactions under the 10b5-1 plan will commence in October 2013 and continue through February 2014, and will be disclosed publically as they occur through Form 144 and Form 4 filings with the Securities and Exchange Commission.

Rule 10b5-1 plans permit individuals who are not in possession of material nonpublic information to establish pre-arranged plans to buy and sell company stock. These plans allow individuals to complete a plan of stock option exercises and associated stock sales gradually over a period of time with advance notification to the market, while avoiding concerns about whether they were aware of material nonpublic information at the time transactions under the plan are executed.

Except as may otherwise be required, the Company does not undertake any obligation to update or report any modification, termination or other activity under Mr. Ayers’s Rule 10b5-1 plan.

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Item 6.Exhibits

Exhibit No. | Description
31.1 | Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2 | Certification of Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1 | Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2 | Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS | XBRL Instance Document.
101.SCH | XBRL Taxonomy Extension Schema Document.
101.CAL | XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF | XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB | XBRL Taxonomy Extension Label Linkbase Document.
101.PRE | XBRL Taxonomy Extension Presentation Linkbase Document.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: October 22, 2013 | IDEXX LABORATORIES, INC. /s/ Jonathan W. Ayers Jonathan W. Ayers Chairman, President and Chief Executive Officer (Principal Executive Officer)
| /s/ Willard R. Blanche, Jr.
| Willard R. Blanche, Jr.
| Chief Financial Officer
| (Principal Financial Officer)

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Exhibit Index

Exhibit No. | Description
31.1 | Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2 | Certification of Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1 | Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2 | Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS | XBRL Instance Document.
101.SCH | XBRL Taxonomy Extension Schema Document.
101.CAL | XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF | XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB | XBRL Taxonomy Extension Label Linkbase Document.
101.PRE | XBRL Taxonomy Extension Presentation Linkbase Document.

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