EX-32.1 4 sesn-09302021x10qex321.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 on Form 10-Q of Sesen Bio, Inc. (the “Company”) for the fiscal quarter ended 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. Section 1350, as adopted pursuant to Section 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 results of operations of the Company.

Date: | November 8, 2021 | By: | /s/ Thomas R. Cannell, D.V.M.
|  | Name: | Thomas R. Cannell, D.V.M.
|  | Title: | President and Chief Executive Officer
|  |  | (Principal Executive Officer)