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MPM Asset Management LLC

SEC CIK
0001263048
Latest filing
Nov 14, 2025

Holdings in Q3 2023

Holdings as of Sep 30, 2023, filed Nov 14, 2023. Long positions only; changes compare share counts with Q2 2023.

Institution overview
Positions
7
−1 vs. Q2 2023
Portfolio value
$186.7M
−$17.2M (−8.4%) vs. Q2 2023
Filed
Nov 14, 2023
SEC
Holdings of MPM Asset Management LLC in Q3 2023
SecurityClassSharesValue% of portfolioShare changeActionHistory
TRDAEntrada Therapeutics, Inc.COM4,425,784$69.9M37.5%00.0%UnchangedHistory
DYNDyne Therapeutics, Inc.COM4,951,303$44.4M23.8%00.0%UnchangedHistory
ITOSiTeos Therapeutics, Inc.COM2,738,785$30.0M16.1%00.0%UnchangedHistory
RPTXRepare Therapeutics Inc.COM2,242,636$27.1M14.5%00.0%UnchangedHistory
HOWLWerewolf Therapeutics, Inc.COM4,284,172$9.17M4.9%00.0%UnchangedHistory
ADAPYAdaptimmune Therapeutics PLCSPONDS ADR6,287,101$4.90M2.6%00.0%UnchangedHistory
HARPHarpoon Therapeutics, Inc.COM313,136$1.26M0.7%00.0%UnchangedConverted for a 1-for-10 splitHistory

Sold out since Q2 2023 (1)

Positions held at the end of Q2 2023 that are gone from this filing.

Positions of MPM Asset Management LLC sold out since Q2 2023
SecurityClassShares in Q2 2023Value in Q2 2023% of portfolio in Q2 2023History
ONCROncorus, Inc.COM2,849,464$115.4K0.1%History