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Insider · CIK 0001400240

Flagship Pioneering, LLC

CIK 0001400240 Name as filed on the most recent filing

Filed as Flagship Pioneering, LLC (1)· Flagship Pioneering Inc. (8)· Flagship Ventures Management, Inc. (13)

83 transaction lines · from 22 filings · filed 2007-05-31 to 2026-03-02 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-22 05:23 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

0 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-22 05:23 UTC.

Transactions filed by this insider
Direction Date Code Company Value USD Filing
2026-03-02 P, Open-market purchase Generate Biomedicines, Inc.GENB 3 lines 75,000,000, acquired Open Form 4 filing 0001193125-26-085888
2023-07-11 P, Open-market purchase Evelo Biosciences, Inc.EVLO 3 lines 12,499,999, acquired Open Form 4 filing 0000950170-23-032871
2023-02-27 P, Open-market purchase Omega Therapeutics, Inc.OMGA 2 lines 19,208,732, acquired Open Form 4 filing 0000899243-23-006241
2022-07-05 P, Open-market purchase Seres Therapeutics, Inc.MCRB 2 lines 27,525,465, acquired Open Form 4 filing 0000899243-22-025721
2022-05-27 P, Open-market purchase Evelo Biosciences, Inc.EVLO 5 lines 39,999,998, acquired Open Form 4 filing 0000899243-22-020533
2021-08-03 P, Open-market purchase Omega Therapeutics, Inc.OMGA 3 lines 19,999,973, acquired Open Form 4 filing 0000899243-21-031797
2021-08-03 P, Open-market purchase Omega Therapeutics, Inc.OMGA 3 lines 19,999,973, acquired Open Form 4 filing 0000899243-21-031796
2020-10-27 P, Open-market purchase Foghorn Therapeutics Inc.FHTX 3 lines 2,400,000, acquired Open Form 4 filing 0000899243-20-029693
2019-03-04 P, Open-market purchase Kaleido Biosciences, Inc.KLDO 3 lines 13,999,995, acquired Open Form 4 filing 0000899243-19-006455
2015-07-27 S, Open-market sale BG Medicine, Inc.BGMD 6 lines 686, disposed Open Form 4 filing 0001181431-15-008835
2015-07-27 S, Open-market sale BG Medicine, Inc.BGMD 6 lines 11,305, disposed Open Form 4 filing 0001181431-15-008833
2014-12-03 S, Open-market sale BG Medicine, Inc.BGMD 3 lines 850, disposed Open Form 4 filing 0001181431-14-038231
2014-12-03 S, Open-market sale BG Medicine, Inc.BGMD 5 lines 1,133, disposed Open Form 4 filing 0001181431-14-038230
2014-12-03 S, Open-market sale BG Medicine, Inc.BGMD 29, disposed Open Form 4 filing 0001181431-14-038228
2014-12-03 S, Open-market sale BG Medicine, Inc.BGMD 29, disposed Open Form 4 filing 0001181431-14-038228
2014-12-03 S, Open-market sale BG Medicine, Inc.BGMD 29, disposed Open Form 4 filing 0001181431-14-038228

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

Search the catalog
Codes on this page
P, Open-market purchase
Open-market purchase
S, Open-market sale
Open-market sale

Every value is as reported on the Form 4, totalled to the dollar. Share counts, the price per share and the full list of reporting owners are on each filing's own page, which every row here opens. A row marked n lines adds up that many filed lines of one filing, on one day, on one side of the market; a filing whose lines fall across two pages is left as its lines on both, so no total here is ever short.

What this insider's stored lines contain

No transaction line is stored for this entity, so there is nothing to break down by code. The catalog holds its filings; what it does not hold is a single reportable line from them, which is a fact about the parse and about these filings, not about the entity.

How to cite this page

ebomi catalog. Flagship Pioneering, LLC, insider transactions. Retrieved 2026-08-22 from https://ebomi.com/insider/0001400240

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

This page as JSON The JSON twin is shaped by the same read model as this page, so the two cannot disagree. Its envelope carries the canonical URL, the retrieval time, the coverage claim, and the licence statement.