0000899243-21-039499.txt : 20211006 0000899243-21-039499.hdr.sgml : 20211006 20211006190110 ACCESSION NUMBER: 0000899243-21-039499 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20211006 FILED AS OF DATE: 20211006 DATE AS OF CHANGE: 20211006 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Rivera Victor CENTRAL INDEX KEY: 0001876623 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-40869 FILM NUMBER: 211310697 MAIL ADDRESS: STREET 1: 210 BROADWAY STREET CITY: CAMBRIDGE STATE: MA ZIP: 02139 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 2021-10-06 0 0001745020 Theseus Pharmaceuticals, Inc. THRX 0001876623 Rivera Victor C/O THESEUS PHARMACEUTICALS, INC. 245 MAIN STREET CAMBRIDGE MA 02142 0 1 0 0 Chief Scientific Officer Common Stock 388324 D Stock Option (right to buy) 0.3175 2030-12-23 Common Stock 344344 D Stock Option (right to buy) 4.0347 2031-03-22 Common Stock 36066 D Stock Option (right to buy) 4.0347 2031-05-26 Common Stock 61549 D The options are immediately exercisable in full due to early exercise rights, subject to the issuer's right of repurchase. The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period with 1/48th of the options vesting monthly after November 18, 2020, subject to the Reporting Person's continuous service with the issuer. The options are immediately exercisable in full due to early exercise rights, subject to the issuer's right of repurchase. The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period with 1/48th of the options vesting monthly after November 18, 2020, subject to the Reporting Person's continuous service with the issuer. The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period with 1/48th of the options vesting monthly after May 27, 2021, subject to the Reporting Person's continuous service with the issuer. /s/ Bradford Dahms - Attorney-in-Fact 2021-10-06 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 this 29th day of July, 2021.


                                        /s/ Victor Rivera
                                        ----------------------------------------
                                        Victor Rivera