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MPM ASSET MANAGEMENT LLC

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13F filer, CIK 1263048, BOSTON, MA

MPM ASSET MANAGEMENT LLC reported $69,438,939 across 6 holdings for the quarter ended 2025-03-31, in a 13F-HR filed 2025-05-15.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000950123-25-005757

Period
2025-03-31
Reported value
$69.4M
Holdings
6
Top 10 weight
100%
New
0
Sold out
0

Largest buys vs the previous quarter

SecurityShares changeApprox. value
HOWLadded+25,688$25K

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.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
REPARE THERAPEUTICS INCreduced-562,389-$555K
ADAPYreduced-219,746-$43.3K

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, Q1 2025

Share positions as resolved from 13F-HR 0000950123-25-005757, largest first. % of portfolio is the value over $69,438,939, 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; 2023Q2: restricted; 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 4,381,062$39.6M57.04%0Timeline
ITEOS THERAPEUTICS INCITEOS THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: 2,738,785 shares; 2024Q1: 2,738,785 shares; 2024Q2: 2,738,785 shares; 2024Q3: 2,738,785 shares; 2024Q4: 2,738,785 shares; 2025Q1: 2,738,785 shares 2,738,785$16.4M23.55%0
DYNDYNE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 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 682,376$7.14M10.28%0Timeline
HOWLWEREWOLF THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 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 4,309,860$4.19M6.03%+25,688Timeline
REPARE THERAPEUTICS INCREPARE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 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 1,121,318$1.11M1.59%-562,389
ADAPYADAPTIMMUNE THERAPEUTICS PLC SQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 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 5,335,715$1.05M1.51%-219,746Timeline

How Q1 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 0000950123-25-005757 base2025-05-15acceptance time not in the bulk data set