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13F-HR filed by Flagship Pioneering, LLC

Flagship Pioneering, LLC filed this 13F-HR for the quarter ended 2026-03-31, filed 2026-05-15, with 5 holding rows worth $1,161,567,162.

Accession
0001193125-26-226588
Filed
2026-05-15
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2026

A holdings report, 7 entries on the cover page, a total value of $1,161,567,162 stated on the cover page (in dollars after the unit check, H1), rows summing to $1,161,567,162 with VALUE read as dollars as filed, 13F file number 028-17559. The quarter's positions are built on this report. The resolved quarter.

Other managers

  • included managerFlagship Ventures Fund IV General Partner LLC 028-17238
  • included managerNoubar Afeyan 028-19988

The information table after summing rows of one CUSIP and put or call (H4), with the CUSIP and issuer name as filed. Values in dollars after the unit check (method).

Issuer as filedCUSIPClassAmountValueValue read asType
GENERATE BIOMEDICINES INC370920100COMMON STOCK62,673,117$783,413,963dollars as filed
MODERNA INC60770K107COM4,632,149$235,313,169dollars as filed
SANA BIOTECHNOLOGY INC799566104COM25,001,856$72,005,346dollars as filed
FOGHORN THERAPEUTICS INC344174107COMMON STOCK12,674,120$60,582,294dollars as filed
SERES THERAPEUTICS INC81750R201CMN1,155,850$10,252,390dollars as filed

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001193125-26-226588this filing2026-05-15acceptance time not in the bulk data set