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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.

New
Increased
Maintained
Reduced
Closed

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%)

Holders
164
Holders Change
+41
Holders Change %
+33.33%
% of All Funds
2.15%
Holding in Top 10
3
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+50%
% of All Funds
0.04%
New
56
Increased
49
Reduced
44
Closed
14
Calls
$26.8M
Puts
$738K
Net Calls
+$26M
Net Calls Change
+$21.9M

Top Buyers

Rank Fund Capital Flow
1
PA
Perceptive Advisors
New York
+$8.4M
2
Millennium Management
Millennium Management
New York
+$6.88M
3
Bank of America
Bank of America
North Carolina
+$6.2M
4
UBS Group
UBS Group
Switzerland
+$5.42M
5
BlackRock
BlackRock
New York
+$3.75M

Top Sellers

Rank Fund Capital Flow
1
Corient Private Wealth
Corient Private Wealth
Florida
-$8.1M
2
Fidelity Investments
Fidelity Investments
Massachusetts
-$7.12M
3
Alyeska Investment Group
Alyeska Investment Group
Illinois
-$5.62M
4
MAM
Monaco Asset Management
Monaco
-$4.78M
5
Acadian Asset Management
Acadian Asset Management
Massachusetts
-$4.7M
Name Holding Trade Value Shares
Change 		Change in
Stake
Two Sigma Advisers
26
Two Sigma Advisers
New York
$4.92M +$436K +197,900 +12%
Charles Schwab
27
Charles Schwab
California
$4.55M +$239K +108,215 +7%
Northern Trust
28
Northern Trust
Illinois
$3.93M -$54.5K -24,723 -2%
MGW
29
MB Generational Wealth
Washington
$3.72M +$3.12M +1,414,824 New
Jacobs Levy Equity Management
30
Jacobs Levy Equity Management
New Jersey
$3.7M +$698K +316,554 +29%
MAM
31
Monaco Asset Management
Monaco
$3.63M -$4.78M -2,170,584 -61%
Focus Partners Wealth
32
Focus Partners Wealth
Massachusetts
$3.49M +$386K +175,198 +15%
Deutsche Bank
33
Deutsche Bank
Germany
$3.36M -$2.17M -982,534 -43%
N
34
Nuveen
North Carolina
$2.83M +$1.83M +830,271 +336%
JG
35
Jain Global
New York
$2.77M +$2.32M +1,054,356 New
Royal Bank of Canada
36
Royal Bank of Canada
Ontario, Canada
$2.63M +$2.03M +919,407 +1,119%
EP
37
Eversept Partners
New York
$2.43M -$1.7M -770,529 -45%
TCM
38
Tang Capital Management
California
$2.1M +$1.76M +800,000 New
Balyasny Asset Management
39
Balyasny Asset Management
Illinois
$2.03M +$1.7M +770,574 New
PIM
40
Platinum Investment Management
Australia
$2.01M -$1.37M -619,698 -45%
Adage Capital Partners
41
Adage Capital Partners
Massachusetts
$1.91M +$1.6M +726,800 New
Jane Street
42
Jane Street
New York
$1.85M +$1.55M +702,065 New
Russell Investments Group
43
Russell Investments Group
United Kingdom
$1.8M +$1.51M +685,049 New
AQR Capital Management
44
AQR Capital Management
Connecticut
$1.7M +$1.43M +646,615 New
Wellington Management Group
45
Wellington Management Group
Massachusetts
$1.69M +$1.41M +641,715 New
Arrowstreet Capital
46
Arrowstreet Capital
Massachusetts
$1.67M -$1.06M -482,575 -43%
Morgan Stanley
47
Morgan Stanley
New York
$1.49M -$556K -252,272 -31%
Walleye Capital
48
Walleye Capital
New York
$1.44M +$1.2M +545,679 New
SAM
49
Silverback Asset Management
North Carolina
$1.31M +$331K +150,000 +43%
WP
50
Woodline Partners
California
$1.3M – – –
1
2
3 4 5

GOSS Hedge Fund Activity: Q3 2025 in Review

164 of the 7,619 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.