sesn-poaforphonigconform

0001485003-21-000157.txt : 20210721 0001485003-21-000157.hdr.sgml : 20210721 20210721173321 ACCESSION NUMBER: 0001485003-21-000157 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 4 CONFORMED PERIOD OF REPORT: 20210720 FILED AS OF DATE: 20210721 DATE AS OF CHANGE: 20210721 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Honig Peter CENTRAL INDEX KEY: 0001484780 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36296 FILM NUMBER: 211105383 MAIL ADDRESS: STREET 1: 3344 N. TORREY PINES COURT, SUITE 200 CITY: LA JOLLA STATE: CA ZIP: 92037 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Sesen Bio, Inc. CENTRAL INDEX KEY: 0001485003 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 262025616 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 245 FIRST STREET STREET 2: SUITE 1800 CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 617-444-8550 MAIL ADDRESS: STREET 1: 245 FIRST STREET STREET 2: SUITE 1800 CITY: CAMBRIDGE STATE: MA ZIP: 02142 FORMER COMPANY: FORMER CONFORMED NAME: Eleven Biotherapeutics, Inc. DATE OF NAME CHANGE: 20100223 3 1 wf-form3_162690318761334.xml FORM 3 X0206 3 2021-07-20 1 0001485003 Sesen Bio, Inc. SESN 0001484780 Honig Peter C/O SESEN BIO, INC. 245 FIRST STREET, SUITE 1800 CAMBRIDGE MA 02142 1 0 0 0 Exhibit List: Exhibit 24 - Power of Attorney /s/ Mark R. Sullivan, as attorney-in-fact 2021-07-21 EX-24 2 sesn-poaforphonigconform.htm PETER HONIG POA sesn-poaforphonigconform

POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints the President and Chief Executive Officer, Chief Financial Officer and General Counsel of Sesen Bio, Inc. (the “Company”), each as the undersigned’s true and lawful attorney- in-fact to: (1) execute for and on behalf of the undersigned, in the undersigned’s capacity as an officer and/or director of the Company, the undersigned’s application for EDGAR Access with the United States Securities and Exchange Commission (Form ID application); (2) execute for and on behalf of the undersigned, in the undersigned’s capacity as an officer and/or director of the Company, Forms 3, 4 and 5, in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder; (3) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to (A) complete and execute any such Forms 3, 4 or 5 (B), complete and execute any amendment or amendments thereto, and (C) timely file such forms with the United States Securities and Exchange Commission and any stock exchange or similar authority; and (4) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in- fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact’s discretion. The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, is not assuming, nor is the Company assuming, any of the undersigned’s responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact. IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 14th day of July, 2021. /s/ Peter Honig Peter Honig