Gossamer Bio
GOSS
123 hedge funds and large institutions have $218M invested in Gossamer Bio in 2025 Q2 according to their latest regulatory filings, with 33 funds opening new positions, 41 increasing their positions, 24 reducing their positions, and 28 closing their positions.
1,868% more call options, than puts
Call options by funds: $4.37M | Put options by funds: $222K
71% more repeat investments, than reductions
Existing positions increased: 41 | Existing positions reduced: 24
18% more first-time investments, than exits
New positions opened: 33 | Existing positions closed: 28
17% more capital invested
Capital invested by funds: $187M → $218M (+$31.1M)
4% more funds holding
Funds holding: 118 → 123 (+5)
3.14% more ownership
Funds ownership: 74.65% → 77.79% (+3.1%)
33% less funds holding in top 10
Funds holding in top 10: 3 → 2 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$9.89M |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
+$2.49M |
| 3 |
State Street
Boston,
Massachusetts
|
+$1.74M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$1.45M |
| 5 |
Renaissance Technologies
New York
|
+$1.27M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$2.76M |
| 2 |
EP
Eversept Partners
New York
|
-$2.4M |
| 3 |
Millennium Management
New York
|
-$2.38M |
| 4 |
Marshall Wace
London,
United Kingdom
|
-$1.89M |
| 5 |
MAM
Monaco Asset Management
Monaco
|
-$1.42M |
GOSS Hedge Fund Activity: Q2 2025 in Review
123 of the 7,613 institutional investors tracked by Wall St. Rank reported a position in Gossamer Bio (GOSS) for Q2 2025, worth a combined $218M — up 17% from $187M a quarter earlier.
Buyers outnumbered sellers: 33 funds opened new GOSS positions and 28 closed out — a net gain of 5 holders — while 41 added to existing stakes and 24 trimmed.
The largest buyer was BlackRock, adding an estimated $9.89M. The largest seller was Susquehanna International Group, cutting an estimated $2.76M.
- 123 institutional investors held Gossamer Bio (GOSS) as of Q2 2025, up from 118 in Q1 2025.
- Funds reported $218M of Gossamer Bio stock for Q2 2025, up 17% quarter-over-quarter.
- 33 funds opened new Gossamer Bio positions in Q2 2025 and 28 closed out, a net change of +5 holders.
- The largest Gossamer Bio buyer in Q2 2025 was BlackRock, an estimated $9.89M added.
- The largest Gossamer Bio seller in Q2 2025 was Susquehanna International Group, an estimated $2.76M sold.
Based on aggregated 13F filings for Q2 2025.