0000950123-23-002466.txt : 20230214 0000950123-23-002466.hdr.sgml : 20230214 20230214130405 ACCESSION NUMBER: 0000950123-23-002466 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20221231 FILED AS OF DATE: 20230214 DATE AS OF CHANGE: 20230214 EFFECTIVENESS DATE: 20230214 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 SEC ACT: 1934 Act SEC FILE NUMBER: 028-13379 FILM NUMBER: 23626086 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 12-31-2022 12-31-2022 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 02-14-2023 0 9 239006072 false INFORMATION TABLE 2 21170.xml INFORMATION TABLE FOR FORM 13F Amryt Pharma plc Common 03217L106 19482554 2668843 SH SOLE 2668843 0 0 Dyne Therapeutics, Inc. Common 26818M108 57385602 4951303 SH SOLE 4951303 0 0 Entrada Therapeutics, Inc. Common 29384C108 59836600 4425784 SH SOLE 4425784 0 0 Harpoon Therapeutics, Inc. Common 41358P106 2273388 3131388 SH SOLE 3131388 0 0 iTeos Therapeutics, Inc. Common 46565G104 53488471 2738785 SH SOLE 2738785 0 0 Oncorus, Inc. Common 68236R103 720914 2849464 SH SOLE 2849464 0 0 Repare Therapeutics, Inc. Common 760273102 32989176 2242636 SH SOLE 2242636 0 0 TCR2 Therapeutics, Inc. Common 87808K106 4046814 4050865 SH SOLE 4050865 0 0 Werewolf Therapeutics, Inc. Common 95075A107 8782553 4284172 SH SOLE 4284172 0 0