0000950123-23-008457.txt : 20230907 0000950123-23-008457.hdr.sgml : 20230907 20230907160603 ACCESSION NUMBER: 0000950123-23-008457 CONFORMED SUBMISSION TYPE: 13F-HR/A PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20230630 FILED AS OF DATE: 20230907 DATE AS OF CHANGE: 20230907 EFFECTIVENESS DATE: 20230907 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MPM ASSET MANAGEMENT LLC CENTRAL INDEX KEY: 0001263048 IRS NUMBER: 043351032 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR/A SEC ACT: 1934 Act SEC FILE NUMBER: 028-13379 FILM NUMBER: 231242293 BUSINESS ADDRESS: STREET 1: 399 BOYLSTON STREET, SUITE 1100 CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 6174259200 MAIL ADDRESS: STREET 1: 399 BOYLSTON STREET, SUITE 1100 CITY: BOSTON STATE: MA ZIP: 02116 13F-HR/A 1 primary_doc.xml X0202 13F-HR/A LIVE 0001263048 XXXXXXXX 06-30-2023 06-30-2023 true 1 RESTATEMENT false MPM ASSET MANAGEMENT LLC

399 BOYLSTON STREET, SUITE 1100 BOSTON MA 02116

13F HOLDINGS REPORT 028-13379 000148467 801-106989 N Brendan Furey (617) 425-9222 /s/Brendan Furey Boston MA 09-06-2023 0 8 203918112 false INFORMATION TABLE 2 26173.xml INFORMATION TABLE FOR FORM 13F Adaptimmune Therapeutics plc Common 00653A107 5815569 6287101 SH SOLE 6287101 0 0 Dyne Therapeutics, Inc. Common 26818M108 55702159 4951303 SH SOLE 4951303 0 0 Entrada Therapeutics, Inc. Common 29384C108 67006370 4425784 SH SOLE 4425784 0 0 Harpoon Therapeutics, Inc. Common 41358P106 2223285 3131388 SH SOLE 3131388 0 0 iTeos Therapeutics, Inc. Common 46565G104 36261513 2738785 SH SOLE 2738785 0 0 Oncorus, Inc. Common 68236R103 115403 2849464 SH SOLE 2849464 0 0 Repare Therapeutics, Inc. Common 760273102 23727089 2242636 SH SOLE 2242636 0 0 Werewolf Therapeutics, Inc. Common 95075A107 13066725 4284172 SH SOLE 4284172 0 0