0000899243-22-018613.txt : 20220518 0000899243-22-018613.hdr.sgml : 20220518 20220518162432 ACCESSION NUMBER: 0000899243-22-018613 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20220517 FILED AS OF DATE: 20220518 DATE AS OF CHANGE: 20220518 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: HAYDEN DONALD J JR CENTRAL INDEX KEY: 0001202285 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-40869 FILM NUMBER: 22939418 MAIL ADDRESS: STREET 1: C/O AMICUS THERAPEUTICS, INC. STREET 2: 1 CEDAR BROOK DRIVE CITY: CRANBURY STATE: NJ ZIP: 08512 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Theseus Pharmaceuticals, Inc. CENTRAL INDEX KEY: 0001745020 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 830712806 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 245 MAIN STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: (857) 400-9491 MAIL ADDRESS: STREET 1: 245 MAIN STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 3 1 doc3.xml FORM 3 SUBMISSION X0206 3 2022-05-17 1 0001745020 Theseus Pharmaceuticals, Inc. THRX 0001202285 HAYDEN DONALD J JR C/O THESEUS PHARMACEUTICALS, INC. 314 MAIN STREET CAMBRIDGE MA 02142 1 0 0 0 Exhibit 24 - Power of Attorney /s/ Bradford Dahms - Attorney-in-Fact 2022-05-18 EX-24 2 attachment1.htm EX-24 DOCUMENT

                               POWER OF ATTORNEY

      The undersigned, as a Section 16 reporting person of Theseus
Pharmaceuticals, Inc., a Delaware corporation (the "Company"), hereby
constitutes and appoints each of Bradford Dahms and Kristine Callahan as the
undersigned's true and lawful attorney-in-fact to:

      (1)   complete and execute Form ID, "Update Passphrase Confirmation" form
and Forms 3, 4 and 5 and other forms and all amendments thereto as such
attorney-in-fact shall in his or her discretion determined to be required or
advisable pursuant to Section 16 of the Securities Exchange Act of 1934 (as
amended) and the rules and regulations promulgated thereunder, or any successor
laws and regulations, as a consequence of the undersigned's ownership,
acquisition or disposition of securities of the Company; and

      (2)   do all acts necessary in order to file such forms with the
Securities and Exchange Commission, any securities exchange or national
association, the Company and such other person or agency as the attorney-in-
fact shall deem appropriate.

      The undersigned hereby ratifies and confirms all that said attorneys-in-
fact and agents shall do or cause to be done by virtue hereof.  The undersigned
acknowledges that the foregoing attorneys-in-fact, in serving in such capacity
at the request of the undersigned, are not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to comply with the
Securities Exchange Act of 1934 (as amended).

      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 May 17, 2022.


                                       /s/ Donald J. Hayden, Jr.
                                       ------------------------------
                                       Donald J. Hayden, Jr.