0000950123-21-015021.txt : 20211115 0000950123-21-015021.hdr.sgml : 20211115 20211112181838 ACCESSION NUMBER: 0000950123-21-015021 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20210930 FILED AS OF DATE: 20211115 DATE AS OF CHANGE: 20211112 EFFECTIVENESS DATE: 20211115 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: 211405407 BUSINESS ADDRESS: STREET 1: 450 KENDALL STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 6174259200 MAIL ADDRESS: STREET 1: 450 KENDALL STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 13F-HR 1 primary_doc.xml 13F-HR LIVE 0001263048 XXXXXXXX 09-30-2021 09-30-2021 false MPM ASSET MANAGEMENT LLC

450 KENDALL STREET CAMBRIDGE MA 02142

13F HOLDINGS REPORT 028-13379 N Ansbert Gadicke (617) 425-9200 /s/Ansbert Gadicke Cambridge MA 11-12-2021 0 9 431481 false INFORMATION TABLE 2 7534.xml INFORMATION TABLE FOR FORM 13F Amryt Pharma plc Common 03217L106 32160 2668845 SH SOLE 2668845 0 0 Dyne Therapeutics, Inc. Common 26818M108 80409 4951303 SH SOLE 4951303 0 0 Harpoon Therapeutics, Inc. Common 41358P106 24738 3131388 SH SOLE 3131388 0 0 iTeos Therapeutics, Inc. Common 46565G104 88849 3290711 SH SOLE 3290711 0 0 Oncorus, Inc. Common 68236R103 26614 2849464 SH SOLE 2849464 0 0 Repare Therapeutics, Inc. Common 760273102 58847 2242636 SH SOLE 2242636 0 0 Rhythm Pharmaceuticals, Inc. Common 76243J105 11875 909258 SH SOLE 909258 0 0 TCR2 Therapeutics, Inc. Common 87808K106 34473 4050865 SH SOLE 4050865 0 0 Werewolf Therapeutics, Inc. Common 95075A107 73516 4284172 SH SOLE 4284172 0 0