AI Portfolio Summary
In 2025 Q4, Flagship Pioneering, LLC maintained a portfolio of 4 distinct positions.
Total Positions
4
Quarter
2025 Q4
Top Holding
MRNA (42.2%)
Top 10 Concentration
100.0%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
1-4 of 4
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
MRNA
Moderna Inc
|
Healthcare | 42.16% | 40.89% |
#1
Prev: #1
|
10.0 | no change | no change |
P
S
|
4,632,149 | $136,602,075 | 2018 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
SANA
Sana Biotechnol...
|
Healthcare | 31.40% | 30.33% |
#2
Prev: #2
|
10.0 | no change | no change |
P
S
|
25,001,856 | $101,757,555 | 2021 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
FHTX
Foghorn Therape...
|
Healthcare | 21.12% | 21.18% |
#3
Prev: #3
|
8.4 | no change | no change |
P
S
|
12,674,120 | $68,440,247 | 2020 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
MCRB
Seres Therapeut...
|
Healthcare | 5.32% | 7.60% |
#4
Prev: #4
|
2.1 | no change | no change |
P
S
|
1,155,850 | $17,236,411 | 2025 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) |
Showing 1-4 of 4 holdings