Managers / Q2 2023 · view latest →
MPM BioImpact LLC
CIK 0001687078 · 399 BOYLSTON STREET, SUITE 1100, BOSTON, MA, 02116 · 6174259200
Reported Value
$497M
Q2 2023
Positions
34
Filings on Record
28
2019–present window
Filed
Aug 14, 2023
original filing
Summary
Mpm Bioimpact Llc reported $497M in U.S.-listed holdings across 34 positions for Q2 2023.
Its largest position, CGEM, represents 16.6% of the portfolio.
Compared with Q1 2023, the fund opened 10 new positions and exited 7.
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 — Q2 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 ↗.