Skip to content
Disclosery

MPM ASSET MANAGEMENT LLC

Follow

13F filer, CIK 1263048, BOSTON, MA

MPM ASSET MANAGEMENT LLC reported $43,346,216 across 5 holdings for the quarter ended 2025-06-30, in a 13F-HR filed 2025-08-14.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000950123-25-008430

Period
2025-06-30
Reported value
$43.3M
Holdings
5
Top 10 weight
100%
New
0
Sold out
1

Largest buys vs the previous quarter

None.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
ITEOS THERAPEUTICS INCexited-2,738,785-$16.4M
ADAPYreduced-526,038-$126K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q2 2025

Share positions as resolved from 13F-HR 0000950123-25-008430, largest first. % of portfolio is the value over $43,346,216, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
TRDAENTRADA THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: 4,425,784 shares; 2024Q1: 4,425,784 shares; 2024Q2: 4,425,784 shares; 2024Q3: 4,425,784 shares; 2024Q4: 4,381,062 shares; 2025Q1: 4,381,062 shares; 2025Q2: 4,381,062 shares 4,381,062$29.4M67.92%0Timeline
DYNDYNE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: 4,951,303 shares; 2024Q1: 3,451,303 shares; 2024Q2: 1,561,496 shares; 2024Q3: 682,376 shares; 2024Q4: 682,376 shares; 2025Q1: 682,376 shares; 2025Q2: 682,376 shares 682,376$6.5M14.99%0Timeline
HOWLWEREWOLF THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: 4,284,172 shares; 2024Q1: 4,284,172 shares; 2024Q2: 4,284,172 shares; 2024Q3: 4,284,172 shares; 2024Q4: 4,284,172 shares; 2025Q1: 4,309,860 shares; 2025Q2: 4,309,860 shares 4,309,860$4.7M10.84%0Timeline
REPARE THERAPEUTICS INCREPARE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: 2,242,636 shares; 2024Q1: 2,242,636 shares; 2024Q2: 2,242,636 shares; 2024Q3: 2,242,636 shares; 2024Q4: 1,683,707 shares; 2025Q1: 1,121,318 shares; 2025Q2: 1,121,318 shares 1,121,318$1.56M3.6%0
ADAPYADAPTIMMUNE THERAPEUTICS PLC SQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: 5,555,461 shares; 2024Q1: 5,555,461 shares; 2024Q2: 5,555,461 shares; 2024Q3: 5,555,461 shares; 2024Q4: 5,555,461 shares; 2025Q1: 5,335,715 shares; 2025Q2: 4,809,677 shares 4,809,677$1.15M2.66%-526,038Timeline

Sold out in Q2 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
ITEOS THERAPEUTICS INCITEOS THERAPEUTICS INC2,738,785$16.4Mshares

How Q2 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0000950123-25-008430 base2025-08-14acceptance time not in the bulk data set