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Flagship Pioneering, LLC
hedge fundUpdated 28 days agoManaged by Flagship Pioneering Inc. • Latest filing Q2 2026
Portfolio value
$1.5B
Q2 2026
Filings
14
Quarterly 13F history
Top-10 concentration
100.0%
Weight of largest holdings
Annualized return
-23.3%
Implied from 13F holdings
Portfolio value history
13F-disclosed portfolio value over 14 quarters
Show data table
| Period | Portfolio value |
|---|---|
| Q1 2023 | $2.6B |
| Q2 2023 | $2.2B |
| Q3 2023 | $1.4B |
| Q4 2023 | $1.3B |
| Q1 2024 | $1.5B |
| Q2 2024 | $843.4M |
| Q3 2024 | $591.9M |
| Q4 2024 | $334.2M |
| Q1 2025 | $235.8M |
| Q2 2025 | $268.5M |
| Q3 2025 | $292.6M |
| Q4 2025 | $324M |
| Q1 2026 | $1.2B |
| Q2 2026 | $1.5B |
Top holdings
7 positions as of Q2 2026
| # | Stock | Value | Shares | % Portfolio | Change |
|---|---|---|---|---|---|
| 1 | G GENB GENERATE BIOMEDICINES INC | $1.1B | 62.67M | 68.66% | — |
| 2 | M MRNA MODERNA INC | $324.1M | 4.63M | 21.05% | — |
| 3 | S SANA SANA BIOTECHNOLOGY INC | $87.3M | 25.00M | 5.67% | — |
| 4 | F FHTX FOGHORN THERAPEUTICS INC | $61.8M | 12.67M | 4.02% | — |
| 5 | ? N/A SERES THERAPEUTICS INC | $5.8M | 733.2K | 0.38% | — |
| 6 | ? N/A SERES THERAPEUTICS INC | $3.3M | 422.6K | 0.22% | — |
| 7 | M MRNA MODERNA INC | $275K | 3.9K | 0.02% | — |