EX-32.1 6 thrx-20210930xex32d1.htm EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Theseus Pharmaceuticals, Inc. (the “Company”) on Form 10-Q for the period ending September 30, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

| (1) | The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

| (2) | The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Novem | ​ | ​ | ​
Date: November 15, 2021 | ​ | By: | /s/ Timothy P. Clackson
​ | ​ | ​ | Name: Timothy P. Clackson
​ | ​ | ​ | Title: Chief Executive Officer (Principal Executive Officer)

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