Gossamer Bio
GOSS
195 hedge funds and large institutions have $573M invested in Gossamer Bio in 2025 Q4 according to their latest regulatory filings, with 49 funds opening new positions, 69 increasing their positions, 49 reducing their positions, and 14 closing their positions.
291% more call options, than puts
Call options by funds: $28.9M | Put options by funds: $7.38M
250% more first-time investments, than exits
New positions opened: 49 | Existing positions closed: 14
41% more repeat investments, than reductions
Existing positions increased: 69 | Existing positions reduced: 49
21% more capital invested
Capital invested by funds: $474M → $573M (+$99.8M)
19% more funds holding
Funds holding: 164 → 195 (+31)
0.71% more ownership
Funds ownership: 79.21% → 79.92% (+0.71%)
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
State Street
Boston,
Massachusetts
|
+$15.5M |
| 2 |
Corient Private Wealth
Miami,
Florida
|
+$10.9M |
| 3 |
BlackRock
New York
|
+$9.16M |
| 4 |
Goldman Sachs
New York
|
+$4.26M |
| 5 |
Two Sigma Investments
New York
|
+$3.17M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
OCA
Octagon Capital Advisors
New York
|
-$8.94M |
| 2 |
SCM
Silverarc Capital Management
Boston,
Massachusetts
|
-$7.54M |
| 3 |
Renaissance Technologies
New York
|
-$6.62M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$4.51M |
| 5 |
Focus Partners Wealth
Boston,
Massachusetts
|
-$3.49M |
GOSS Hedge Fund Activity: Q4 2025 in Review
195 of the 8,267 institutional investors tracked by Wall St. Rank reported a position in Gossamer Bio (GOSS) for Q4 2025, worth a combined $573M — up 21% from $474M a quarter earlier.
Buyers outnumbered sellers: 49 funds opened new GOSS positions and 14 closed out — a net gain of 35 holders — while 69 added to existing stakes and 49 trimmed.
The largest buyer was State Street, adding an estimated $15.5M. The largest seller was Octagon Capital Advisors, cutting an estimated $8.94M.
- 195 institutional investors held Gossamer Bio (GOSS) as of Q4 2025, up from 164 in Q3 2025.
- Funds reported $573M of Gossamer Bio stock for Q4 2025, up 21% quarter-over-quarter.
- 49 funds opened new Gossamer Bio positions in Q4 2025 and 14 closed out, a net change of +35 holders.
- The largest Gossamer Bio buyer in Q4 2025 was State Street, an estimated $15.5M added.
- The largest Gossamer Bio seller in Q4 2025 was Octagon Capital Advisors, an estimated $8.94M sold.
Based on aggregated 13F filings for Q4 2025.