Investor
Flagship Pioneering, LLC
CIK 0001400240 · filed 2026-05-15 · SEC filing
13F book
$1.16B
Positions
5
1 new · 0 sold
Largest name
67.4%
Generate Biomedicines, Inc. · GENB
Est. mark
$54.1M
Price effect on 4 names still held. Flow $783.4M.
| Name | Ticker | Shares | Value | Weight | Est. mark | Change |
|---|---|---|---|---|---|---|
| Generate Biomedicines, Inc. | GENB | 62.7M | $783.4M | 67.4% | — | New |
| Moderna, Inc. | MRNA | 4.63M | $235.3M | 20.3% | $98.7M | Held |
| Sana Biotechnology, Inc. | SANA | 25M | $72M | 6.2% | −$29.8M | Held |
| Foghorn Therapeutics Inc. | FHTX | 12.7M | $60.6M | 5.2% | −$7.86M | Held |
| Seres Therapeutics, Inc. | MCRB | 1.16M | $10.3M | 0.9% | −$6.98M | Held |
Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.