Terminal · Institutions

Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.

Flagship Pioneering Inc. 13F Holdings -- Portfolio & Top Positions (2026-06-30)

Flagship Pioneering Inc. (CIK 1400240) reported $1.54B across 5 reported positions in its SEC 13F filing for 2026-06-30. Largest positions: GENB ($1.06B, 68.66%), MRNA ($324.4M, 21.07%), SANA ($87.3M, 5.67%), FHTX ($61.8M, 4.02%), MCRB ($9.1M, 0.59%). Source: SEC Form 13F.

RankTickerCompanyValue% PortfolioSharesAction
1GENBGENERATE BIOMEDICINES INC$1.06B68.66%62.7MHold
2MRNAMODERNA INC$324.4M21.07%4.6MHold
3SANASANA BIOTECHNOLOGY INC$87.3M5.67%25.0MHold
4FHTXFOGHORN THERAPEUTICS INC$61.8M4.02%12.7MHold
5MCRBSERES THERAPEUTICS INC$9.1M0.59%1.2MHold

Source: SEC Form 13F filings · as of 2026-06-30