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MPM ASSET MANAGEMENT LLC

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13F filer, CIK 1263048, BOSTON, MA

MPM ASSET MANAGEMENT LLC reported $245,154,757 across 6 holdings for the quarter ended 2024-03-31, in a 13F-HR filed 2024-05-15.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000950123-24-005709

Period
2024-03-31
Reported value
$245M
Holdings
6
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
DYNreduced-1,500,000-$42.6M
HARPOON THERAPEUTICS INCexited-313,136-$3.56M

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 2024

Share positions as resolved from 13F-HR 0000950123-24-005709, largest first. % of portfolio is the value over $245,154,757, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
DYNDYNE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q2: restricted; 2022Q3: restricted; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: 4,951,303 shares; 2024Q1: 3,451,303 shares 3,451,303$98M39.97%-1,500,000Timeline
TRDAENTRADA THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q2: restricted; 2022Q3: restricted; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: 4,425,784 shares; 2024Q1: 4,425,784 shares 4,425,784$62.7M25.58%0Timeline
ITEOS THERAPEUTICS INCITEOS THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q2: restricted; 2022Q3: restricted; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: 2,738,785 shares; 2024Q1: 2,738,785 shares 2,738,785$37.4M15.24%0
HOWLWEREWOLF THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q2: restricted; 2022Q3: restricted; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: 4,284,172 shares; 2024Q1: 4,284,172 shares 4,284,172$27.8M11.32%0Timeline
REPARE THERAPEUTICS INCREPARE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q2: restricted; 2022Q3: restricted; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: 2,242,636 shares; 2024Q1: 2,242,636 shares 2,242,636$10.6M4.31%0
ADAPYADAPTIMMUNE THERAPEUTICS PLC SQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q2: restricted; 2022Q3: restricted; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: 5,555,461 shares; 2024Q1: 5,555,461 shares 5,555,461$8.78M3.58%0Timeline

Sold out in Q1 2024

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

SecurityShares beforeValue beforeType
HARPOON THERAPEUTICS INCHARPOON THERAPEUTICS INC313,136$3.56Mshares

How Q1 2024 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 0000950123-24-005709 base2024-05-15acceptance time not in the bulk data set