0000950123-24-001862.txt : 20240213 0000950123-24-001862.hdr.sgml : 20240213 20240213160604 ACCESSION NUMBER: 0000950123-24-001862 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20231231 FILED AS OF DATE: 20240213 DATE AS OF CHANGE: 20240213 EFFECTIVENESS DATE: 20240213 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MPM ASSET MANAGEMENT LLC CENTRAL INDEX KEY: 0001263048 ORGANIZATION NAME: IRS NUMBER: 043351032 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-13379 FILM NUMBER: 24625775 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 1 primary_doc.xml X0202 13F-HR LIVE 0001263048 XXXXXXXX 12-31-2023 12-31-2023 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) 425-9203 /s/Brendan Furey Boston MA 02-13-2024 0 7 203501091 false INFORMATION TABLE 2 30489.xml INFORMATION TABLE FOR FORM 13F Adaptimmune Therapeutics plc Sponsored ADR 00653A107 4405481 5555461 SH SOLE 5555461 0 0 Dyne Therapeutics, Inc. Common 26818M108 65852330 4951303 SH SOLE 4951303 0 0 Entrada Therapeutics, Inc. Common 29384C108 66785081 4425784 SH SOLE 4425784 0 0 Harpoon Therapeutics, Inc. Common 41358P205 3560356 313136 SH SOLE 313136 0 0 iTeos Therapeutics, Inc. Common 46565G104 29989696 2738785 SH SOLE 2738785 0 0 Repare Therapeutics, Inc. Common 760273102 16371243 2242636 SH SOLE 2242636 0 0 Werewolf Therapeutics, Inc. Common 95075A107 16536904 4284172 SH SOLE 4284172 0 0