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MPM Asset Management LLC

SEC CIK
0001263048
Latest filing
Nov 14, 2025

Holdings in Q2 2023

Holdings as of Jun 30, 2023, filed Sep 7, 2023. Long positions only; changes compare share counts with Q1 2023.

Institution overview
Positions
8
−1 vs. Q1 2023
Portfolio value
$203.9M
−$36.1M (−15.0%) vs. Q1 2023
Filed
Sep 7, 2023
AmendedSEC
Holdings of MPM Asset Management LLC in Q2 2023
SecurityClassSharesValue% of portfolioShare changeActionHistory
TRDAEntrada Therapeutics, Inc.COM4,425,784$67.0M32.9%00.0%UnchangedHistory
DYNDyne Therapeutics, Inc.COM4,951,303$55.7M27.3%00.0%UnchangedHistory
ITOSiTeos Therapeutics, Inc.COM2,738,785$36.3M17.8%00.0%UnchangedHistory
RPTXRepare Therapeutics Inc.COM2,242,636$23.7M11.6%00.0%UnchangedHistory
HOWLWerewolf Therapeutics, Inc.COM4,284,172$13.1M6.4%00.0%UnchangedHistory
ADAPYAdaptimmune Therapeutics PLCSPONDS ADR6,287,101$5.82M2.9%+6,287,101NewHistory
HARPHarpoon Therapeutics, Inc.COM3,131,388$2.22M1.1%00.0%UnchangedHistory
ONCROncorus, Inc.COM2,849,464$115.4K0.1%00.0%UnchangedHistory

Sold out since Q1 2023 (2)

Positions held at the end of Q1 2023 that are gone from this filing.

Positions of MPM Asset Management LLC sold out since Q1 2023
SecurityClassShares in Q1 2023Value in Q1 2023% of portfolio in Q1 2023History
Amryt Pharma PLC03217L106SPONSORED ADS2,668,843$38.9M16.2%–
TCRRTCR2 Therapeutics Inc.COM4,050,865$6.08M2.5%History