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MPM Asset Management LLC

SEC CIK
0001263048
Latest filing
Nov 14, 2025

Holdings in Q4 2021

Holdings as of Dec 31, 2021, filed Feb 11, 2022. Long positions only; changes compare share counts with Q3 2021.

Institution overview
Positions
10
+1 vs. Q3 2021
Portfolio value
$462.7M
+$31.3M (+7.2%) vs. Q3 2021
Filed
Feb 11, 2022
SEC
Holdings of MPM Asset Management LLC in Q4 2021
SecurityClassSharesValue% of portfolioShare changeActionHistory
ITOSiTeos Therapeutics, Inc.COM2,885,470$134.3M29.0%−405,241−12.3%ReducedHistory
TRDAEntrada Therapeutics, Inc.COM4,425,784$75.8M16.4%+4,425,784NewHistory
DYNDyne Therapeutics, Inc.COM4,951,303$58.9M12.7%00.0%UnchangedHistory
HOWLWerewolf Therapeutics, Inc.COM4,284,172$51.0M11.0%00.0%UnchangedHistory
RPTXRepare Therapeutics Inc.COM2,242,636$47.3M10.2%00.0%UnchangedHistory
Amryt Pharma PLC03217L106SPONSORED ADS2,668,843$28.8M6.2%−20.0%Reduced–
HARPHarpoon Therapeutics, Inc.COM3,131,388$23.6M5.1%00.0%UnchangedHistory
TCRRTCR2 Therapeutics Inc.COM4,050,865$18.9M4.1%00.0%UnchangedHistory
ONCROncorus, Inc.COM2,849,464$15.0M3.2%00.0%UnchangedHistory
RYTMRhythm Pharmaceuticals, Inc.COM909,258$9.07M2.0%00.0%UnchangedHistory