Flagship Pioneering, LLC

Director · Ten-percent owner · FHTX

As of 2026-09-16, Flagship Pioneering, LLC has 23 Form 4 transactions on record across 1 company — 23 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $0Indirect: $4.7M$4.7Mas of 2026-09-16
  • Direct $0
  • Indirect $4.7M
FHTXindirect1,117,734 sh$4.7M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

FHTX · 23 trades
2026-01-13: Award / grant, 2,235,468 sh ($15.0M)2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh2026-01-13: Award / grant, 1,117,734 sh

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
23 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-01-13FHTXAward / grant2,235,4682,235,468Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4
2026-01-13FHTXAward / grant1,117,7341,117,734Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.