Sign in

Private company

Flagship Pioneering, LLC

American company, incorporated in Delaware. Summary from the record

Last updated Oct 21, 2026.

Overview

  • HeadquartersDE1

See how the biggest companies compare on our leaderboards

Corporate structure

Flagship Pioneering, LLC is part of a group headed by Flagship Pioneering Holdings, Inc.. 3 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of Flagship Pioneering, LLC

  • Noubar B Afeyan Owns control (general partner, trustee or manager) of Flagship Pioneering Futures, LLC, since 12/2025 (Form ADV)
  • Flagship Pioneering Holdings, Inc.

Built from major holders from Schedules 13D and 13G; stakes of 5% or more it reported on Schedules 13D and 13G (1 companies); owners and owned firms from Form ADV, the registration investment advisers file with the SEC. Each entity in the chart links to its source.

Investment adviser

Flagship Pioneering, LLC is registered with the SEC as an investment adviser. This is what it reports on Form ADV, the registration every adviser files and keeps current.

Who owns it

Owners of 5% or more as the firm lists them (Schedule A), and the owners of those owners up the chain (Schedule B).

  • FLAGSHIP PIONEERING HOLDINGS, INC.owns 75% or more, since 01/2026
  • Noubar B Afeyanowns general partner, trustee or manager of FLAGSHIP PIONEERING FUTURES, LLC, since 12/2025
  • Noubar B Afeyanowns general partner, trustee or manager of FLAGSHIP PIONEERING HOLDINGS, INC., since 12/2025

Filings

23 filings to the SEC since October 2021: 23 other. The latest 20:

  1. Aug 31, 2026N-PX EDGAR
  2. Aug 14, 202613F-HR EDGAR
  3. May 15, 202613F-HR EDGAR
  4. Feb 17, 202613F-HR EDGAR
  5. Nov 14, 202513F-HR EDGAR
  6. Sep 2, 2025N-PX EDGAR
  7. Aug 14, 202513F-HR EDGAR
  8. May 15, 202513F-HR EDGAR
  9. Feb 14, 202513F-HR EDGAR
  10. Nov 14, 202413F-HR EDGAR
  11. Sep 3, 2024N-PX EDGAR
  12. Aug 14, 202413F-HR EDGAR
  13. May 15, 202413F-HR EDGAR
  14. Feb 14, 202413F-HR EDGAR
  15. Nov 14, 202313F-HR EDGAR
  16. Aug 14, 202313F-HR EDGAR
  17. May 15, 202313F-HR EDGAR
  18. Feb 14, 202313F-HR EDGAR
  19. Nov 14, 202213F-HR EDGAR
  20. Aug 15, 202213F-HR EDGAR

The 23 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Stakes it holds

Flagship Pioneering, LLC has told the SEC it owns more than 5% of 1 company, latest first (Schedules 13D and 13G).

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3