Gossamer Bio
GOSS
164 hedge funds and large institutions have $474M invested in Gossamer Bio in 2025 Q3 according to their latest regulatory filings, with 56 funds opening new positions, 49 increasing their positions, 44 reducing their positions, and 14 closing their positions.
3,529% more call options, than puts
Call options by funds: $26.8M | Put options by funds: $738K
300% more first-time investments, than exits
New positions opened: 56 | Existing positions closed: 14
117% more capital invested
Capital invested by funds: $218M → $474M (+$256M)
50% more funds holding in top 10
Funds holding in top 10: 2 → 3 (+1)
33% more funds holding
Funds holding: 123 → 164 (+41)
11% more repeat investments, than reductions
Existing positions increased: 49 | Existing positions reduced: 44
1.41% more ownership
Funds ownership: 77.79% → 79.21% (+1.4%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PA
Perceptive Advisors
New York
|
+$8.4M |
| 2 |
Millennium Management
New York
|
+$6.88M |
| 3 |
Bank of America
Charlotte,
North Carolina
|
+$6.2M |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$5.42M |
| 5 |
BlackRock
New York
|
+$3.75M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Corient Private Wealth
Miami,
Florida
|
-$8.1M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$7.12M |
| 3 |
Alyeska Investment Group
Chicago,
Illinois
|
-$5.62M |
| 4 |
MAM
Monaco Asset Management
Monaco
|
-$4.78M |
| 5 |
Acadian Asset Management
Boston,
Massachusetts
|
-$4.7M |
GOSS Hedge Fund Activity: Q3 2025 in Review
164 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Gossamer Bio (GOSS) for Q3 2025, worth a combined $474M — up 117% from $218M a quarter earlier.
Buyers outnumbered sellers: 56 funds opened new GOSS positions and 14 closed out — a net gain of 42 holders — while 49 added to existing stakes and 44 trimmed.
The largest buyer was Perceptive Advisors, opening a new position worth an estimated $8.4M. The largest seller was Corient Private Wealth, cutting an estimated $8.1M.
- 164 institutional investors held Gossamer Bio (GOSS) as of Q3 2025, up from 123 in Q2 2025.
- Funds reported $474M of Gossamer Bio stock for Q3 2025, up 117% quarter-over-quarter.
- 56 funds opened new Gossamer Bio positions in Q3 2025 and 14 closed out, a net change of +42 holders.
- The largest Gossamer Bio buyer in Q3 2025 was Perceptive Advisors, an estimated $8.4M added.
- The largest Gossamer Bio seller in Q3 2025 was Corient Private Wealth, an estimated $8.1M sold.
Based on aggregated 13F filings for Q3 2025.