Managers / Q4 2023 · view latest →
MPM BioImpact LLC
CIK 0001687078 · 399 BOYLSTON STREET, SUITE 1100, BOSTON, MA, 02116 · 6174259200
Reported Value
$427M
Q4 2023
Positions
32
Filings on Record
28
2019–present window
Filed
Feb 13, 2024
original filing
Summary
Mpm Bioimpact Llc reported $427M in U.S.-listed holdings across 32 positions for Q4 2023.
Its largest position, CGEM, represents 18.2% of the portfolio.
Compared with Q3 2023, the fund opened 2 new positions and exited 2.
Reported Value by Quarter
13F Reported Value
Portfolio Composition
By security type
Composition data arrives with ticker enrichment.
Quarter-over-Quarter Changes full breakdown →
Holdings — Q4 2023
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $1.3B | 41 | May 15, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $874M | 38 | Feb 17, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $611M | 40 | Nov 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $577M | 44 | Aug 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $582M | 43 | May 15, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q4 2024 | $704M | 47 | Feb 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $667M | 43 | Nov 13, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q2 2024 | $644M | 44 | Aug 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q1 2024 | $622M | 38 | May 15, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q4 2023 | $427M | 32 | Feb 13, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q3 2023 | $375M | 32 | Nov 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q2 2023 | $497M | 34 | Aug 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q1 2023 | $385M | 31 | May 12, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q4 2022 | $385.5B | 33 | Feb 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q3 2022 | $422M | 38 | Nov 14, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q2 2022 | $360M | 37 | Aug 11, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q1 2022 | $373M | 37 | May 13, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q4 2021 | $549M | 33 | Feb 11, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q3 2021 | $645M | 33 | Nov 15, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q2 2021 | $609M | 14 | Aug 13, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q1 2021 | $796M | 13 | May 13, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q4 2020 | $569M | 13 | Feb 24, 2021 | RESTATEMENT | changes · EDGAR ↗ |
| Q3 2020 | $415M | 12 | Nov 19, 2020 | RESTATEMENT | changes · EDGAR ↗ |
| Q2 2020 | $376M | 11 | Aug 12, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q1 2020 | $164M | 10 | May 13, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q4 2019 | $282M | 12 | Feb 14, 2020 | 13F-HR | changes · EDGAR ↗ |
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.