Flagship Pioneering, LLC

13F Portfolio Filings

Most recent 13F
Q2 2026
Also reports for
Based on Q2 2026 13F notices
13D/G filings
13G on 1 security
Location
Cambridge, MA
CIK
0001400240
Alternate names
Flagship Pioneering Inc., Flagship Ventures Management, Inc.
All SEC filings
View on sec.gov
Holdings Value
Quarter Holdings Value ($000) Top Holdings Form Type Date Filed Filing ID
Q2 2026 5 1,539,910 GENERATE BIOMEDICINES INC, MRNA, SANA, FHTX 13F-HR 8/14/2026 000119312526352122
Q1 2026 5 1,161,567 GENERATE BIOMEDICINES INC, MRNA, SANA, FHTX 13F-HR 5/15/2026 000119312526226588
Q4 2025 4 324,036 MRNA, SANA, FHTX, MCRB 13F-HR 2/17/2026 000119312526054539
Q3 2025 4 292,619 MRNA, SANA, FHTX, Seres Therapeutics Inc 13F-HR 11/14/2025 000119312525282859
Q2 2025 4 268,465 MRNA, SANA, FHTX, Seres Therapeutics Inc 13F-HR 8/14/2025 000095012325008304
Q1 2025 4 235,769 MRNA, FHTX, SANA, MCRB 13F-HR 5/15/2025 000095012325005707
Q4 2024 5 334,222 MRNA, FHTX, SANA, OMGAQ 13F-HR 2/14/2025 000095012325002708
Q3 2024 6 591,878 MRNA, FHTX, SANA, OMGAQ 13F-HR 11/14/2024 000095012324011756
Q2 2024 6 843,359 MRNA, SANA, FHTX, OMGAQ 13F-HR 8/14/2024 000095012324008727
Q1 2024 7 1,524,565 MRNA, SANA, OMGAQ, FHTX 13F-HR 5/15/2024 000095012324005589
Q4 2023 7 1,325,311 MRNA, SANA, OMGAQ, FHTX 13F-HR 2/14/2024 000095012324002510
Q3 2023 9 1,377,673 MRNA, SANA, FHTX, OMGAQ 13F-HR 11/14/2023 000095012323010821
Q2 2023 10 2,240,750 MRNA, SANA, OMGAQ, MCRB 13F-HR 8/14/2023 000095012323008070
Q1 2023 11 2,573,424 MRNA, OMGAQ, MCRB, SANA 13F-HR 5/15/2023 000095012323005258
Q4 2022 12 3,132,284 MRNA, OMGAQ, SANA, MCRB 13F-HR 2/14/2023 000095012323002460
Q3 2022 12 2,375,805 MRNA, SANA, MCRB, OMGAQ 13F-HR 11/14/2022 000095012322012261
Q2 2022 12 2,654,624 MRNA, SANA, FHTX, EVLO 13F-HR 8/15/2022 000095012322009421
Q1 2022 13 4,258,761 MRNA, SANA, RUBY, FHTX 13F-HR 5/16/2022 000095012322006309
Q4 2021 13 6,467,997 MRNA, SANA, RUBY, OMGAQ 13F-HR 2/14/2022 000095012322002901
Q3 2021 13 9,549,130 MRNA, SANA, RUBY, OMGAQ 13F-HR 11/15/2021 000095012321015487
Q2 2021 12 7,829,539 MRNA, RUBY, SANA, MCRB 13F-HR 8/16/2021 000095012321011113
Q1 2021 12 6,244,355 MRNA, SANA, RUBY, MCRB 13F-HR 5/17/2021 000095012321007079
Q4 2020 11 5,493,282 MRNA, SGTX, MCRB, RUBY 13F-HR 2/16/2021 000095012321002948
Q3 2020 8 3,619,952 MRNA, MCRB, KLDO, DNLI 13F-HR 11/16/2020 000095012320012128
Q2 2020 8 3,441,586 MRNA, RUBY, DNLI, KLDO 13F-HR 8/13/2020 000095012320008652
Q1 2020 8 2,133,438 MRNA, RUBY, DNLI, KLDO 13F-HR 5/14/2020 000095012320004927
Q4 2019 9 1,788,867 MRNA, RUBY, DNLI, KLDO 13F-HR 2/13/2020 000095012320001884
Q3 2019 10 1,828,054 MRNA, RUBY, KLDO, DNLI 13F-HR 11/14/2019 000095012319011393
Q2 2019 10 2,310,279 MRNA, RUBY, KLDO, DNLI 13F-HR 8/13/2019 000095012319007818
Q1 2019 8 2,642,256 MRNA, RUBY, KLDO, DNLI 13F-HR 5/14/2019 000101297519000346
Q4 2018 7 2,047,628 MRNA, RUBY, EVLO, DNLI 13F-HR 2/13/2019 000101297519000145
Q3 2018 6 1,513,015 RUBY, EVLO, DNLI, MCRB 13F-HR 11/13/2018 000101297518001201
Q2 2018 5 522,113 EVLO, DNLI, MCRB, SYRS 13F-HR 8/7/2018 000101297518000952
Q1 2018 4 344,896 DNLI, MCRB, SYRS, QTRX 13F-HR 5/15/2018 000101297518000415
Q4 2017 5 394,322 DNLI, MCRB, EDIT, QTRX 13F-HR 2/14/2018 000101297518000160
Q3 2017 4 298,998 MCRB, SYRS, EDIT, TTOO 13F-HR 11/3/2017 000101297517000806
Q2 2017 4 283,568 MCRB, SYRS, EDIT, TTOO 13F-HR 8/2/2017 000101297517000578
Q1 2017 7 376,254 MCRB, SYRS, EDIT, AGIO 13F-HR 5/10/2017 000101297517000377
Q4 2016 7 307,344 MCRB, SYRS, EDIT, AGIO 13F-HR 2/13/2017 000101297517000113
Q3 2016 7 365,999 MCRB, SYRS, AGIO, EDIT 13F-HR 11/14/2016 000101297516001561

13D and 13G Filings

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Investors who own more than 5% of a class must file a Schedule 13D or 13G.

1 security where the latest filing since 12/18/2024 is a 13G, filed 5/15/2026. View all