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FP

Flagship Pioneering Portfolio holdings

AUM $1.16B
1-Year Est. Return 67.93%
This Fund
S&P 500
This Quarter Est. Return
+12.92%
1 Year Est. Return
+67.93%
3 Year Est. Return
-39.17%
5 Year Est. Return
-45.89%
10 Year Est. Return
–
AUM
$293M
AUM Growth
+$24.2M
Cap. Flow
$0
Cap. Flow %
0%
Top 10 Hldgs %
100%
Holding
4
New
–
Increased
–
Reduced
–
Closed
–

Top Buys

No buys this quarter

Top Sells

No sells this quarter

Sector Composition

Rank Sector Weight
1 Healthcare 100%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MRNA icon
1
Moderna
MRNA
$21.5B
$120M 40.89%
4,632,149
– –
SANA icon
2
Sana Biotechnology
SANA
$885M
$88.8M 30.33%
25,001,856
– –
FHTX icon
3
Foghorn Therapeutics
FHTX
$285M
$62M 21.18%
12,674,120
– –
MCRB icon
4
Seres Therapeutics
MCRB
$48.1M
$22.2M 7.6%
1,155,850
– –

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BI
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SCP
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SFG
SNS Financial Group Minneapolis, Minnesota $1.16B AUM 13.88% 1-Year Est. Return
GAB
German American Bancorp Jasper, Indiana $1.16B AUM 25.7% 1-Year Est. Return
AMI
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FFP
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MI
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Flagship Pioneering's Q3 2025 Portfolio in Review

As of Q3 2025, Flagship Pioneering held 4 positions worth $293M, up 9% from $268M the previous quarter. Its ten largest holdings account for 100% of the portfolio.

Trading was light in Q3 2025: portfolio turnover was 0%. Flagship Pioneering opened no new positions and made no exits, leaving the 4-position portfolio largely intact.

By sector, the portfolio is most concentrated in Healthcare at 100% of assets, unchanged from a quarter earlier.

  • Flagship Pioneering's ten largest holdings make up 100% of its $293M portfolio in Q3 2025.
  • Flagship Pioneering opened 0 new positions and closed 0 in Q3 2025.
  • Flagship Pioneering's portfolio value rose 9% quarter-over-quarter to $293M.

Based on Flagship Pioneering's 13F filing for Q3 2025, filed 14 Nov 2025.