MPM ASSET MANAGEMENT LLC

CIK 1263048 · View on SEC EDGAR ↗

Portfolio value
$44.5M
#8,758 of 9,443 by 13F value · top 92.7%
Positions
4
As of
Sept. 30, 2025 Data as of Q3 2025

Portfolio value QoQ: +2.7% 13F does not disclose cash

Top 10 holdings weight
100.00%
Top 25 holdings weight
100.00%
Positions above 1%
4
Effective number of positions
2.5

Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)

Turnover Q3 2025: 0.0% Est. buys $0 · sells $1,152,880

Median holding: 4.0 quarters Tracked Q4 2024–Q3 2025 · 66.7% still held

New positions
0
Increased
0
Decreased
0
Closed
1
On this page

Sector breakdown

Healthcare
100.0%

Full portfolio 4 positions

Type Streak 8Q trend
TRDA Entrada Therapeutics, Inc. - Common Stock $25,410,160 57.09% 4,381,062 $-4,030,577
DYN Dyne Therapeutics, Inc. - Common Stock $8,632,056 19.40% 682,376 $2,135,836
HOWL Werewolf Therapeutics, Inc. - Common Stock $8,490,424 19.08% 4,309,860 $3,792,677
RPTX Repare Therapeutics Inc. - Common Shares $1,973,520 4.43% 1,121,318 $414,888

Top movers (QoQ)

Security Action Shares Δ Value Δ
TRDA Price move only +0 -$4.0M
HOWL Price move only +0 +$3.8M
DYN Price move only +0 +$2.1M
RPTX Price move only +0 +$415K

Exited positions

Includes corporate events (mergers, delistings) — not all exits are sells

Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.

SecurityQuarter Shares before Value before Price since exit
ITOS June 30, 2025 2,738,785 $16,350,546 No longer tracked
ADAPY Sept. 30, 2025 4,809,677 $1,152,880 No longer tracked