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Gossamer Bio
GOSS

118 hedge funds and large institutions have $187M invested in Gossamer Bio in 2025 Q1 according to their latest regulatory filings, with 23 funds opening new positions, 35 increasing their positions, 30 reducing their positions, and 9 closing their positions.

New
Increased
Maintained
Reduced
Closed

2,407% more call options, than puts

Call options by funds: $2.93M | Put options by funds: $117K

200% more funds holding in top 10

Funds holding in top 10: 1 → 3 (+2)

156% more first-time investments, than exits

New positions opened: 23 | Existing positions closed: 9

21% more capital invested

Capital invested by funds: $155M → $187M (+$31.8M)

17% more repeat investments, than reductions

Existing positions increased: 35 | Existing positions reduced: 30

12% more funds holding

Funds holding: 105 → 118 (+13)

0.97% less ownership

Funds ownership: 75.62% → 74.65% (-0.97%)

Holders
118
Holders Change
+13
Holders Change %
+12.38%
% of All Funds
1.58%
Holding in Top 10
3
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+200%
% of All Funds
0.04%
New
23
Increased
35
Reduced
30
Closed
9
Calls
$2.93M
Puts
$117K
Net Calls
+$2.82M
Net Calls Change
+$2.31M

Top Buyers

Rank Fund Capital Flow
1
Susquehanna International Group
Susquehanna International Group
Pennsylvania
+$2.7M
2
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$1.45M
3
Goldman Sachs
Goldman Sachs
New York
+$954K
4
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
+$929K
5
AI
Atom Investors
Texas
+$811K

Top Sellers

Rank Fund Capital Flow
1
Alyeska Investment Group
Alyeska Investment Group
Illinois
-$5.37M
2
PIM
Platinum Investment Management
Australia
-$1.67M
3
Jacobs Levy Equity Management
Jacobs Levy Equity Management
New Jersey
-$1.45M
4
EP
Eversept Partners
New York
-$1.25M
5
Millennium Management
Millennium Management
New York
-$1.05M
Name Holding Trade Value Shares
Change 		Change in
Stake
Renaissance Technologies
26
Renaissance Technologies
New York
$1.73M -$166K -143,348 -8%
LCM
27
Laurion Capital Management
New York
$1.71M +$73.3K +63,446 +4%
Two Sigma Advisers
28
Two Sigma Advisers
New York
$1.42M +$150K +129,700 +11%
Two Sigma Investments
29
Two Sigma Investments
New York
$1.4M +$444K +384,133 +43%
Charles Schwab
30
Charles Schwab
California
$1.25M -$119K -103,032 -8%
EAM
31
Exome Asset Management
New York
$1.21M – – –
Goldman Sachs
32
Goldman Sachs
New York
$1.03M +$954K +825,047 +720%
DCM
33
DAFNA Capital Management
California
$999K -$580K -501,408 -36%
Qube Research & Technologies (QRT)
34
Qube Research & Technologies (QRT)
United Kingdom
$985K +$231K +199,609 +29%
State Street
35
State Street
Massachusetts
$971K +$132K +114,200 +15%
Arrowstreet Capital
36
Arrowstreet Capital
Massachusetts
$884K +$929K +803,815 New
WP
37
Woodline Partners
California
$801K – – –
AI
38
Atom Investors
Texas
$772K +$811K +701,975 New
Focus Partners Wealth
39
Focus Partners Wealth
Massachusetts
$770K +$809K +700,000 New
GCP
40
GSA Capital Partners
United Kingdom
$765K -$193K -166,860 -19%
Jane Street
41
Jane Street
New York
$752K +$775K +670,649 +5,250%
AI
42
Allostery Investments
Connecticut
$674K – – –
BCM
43
Bridgeway Capital Management
Texas
$617K +$23K +19,900 +4%
HCM
44
Highbridge Capital Management
New York
$547K -$116K -100,000 -17%
Morgan Stanley
45
Morgan Stanley
New York
$505K +$359K +310,978 +209%
OCM
46
Opti Capital Management
New York
$456K +$268K +231,833 +127%
Northern Trust
47
Northern Trust
Illinois
$451K -$1.4K -1,210 -0.3%
HF
48
HRT Financial
New York
$428K +$450K +389,452 New
PCM
49
Prelude Capital Management
New York
$414K -$44K -38,045 -9%
Mackenzie Financial
50
Mackenzie Financial
Ontario, Canada
$388K +$60.9K +52,658 +18%
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GOSS Hedge Fund Activity: Q1 2025 in Review

118 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Gossamer Bio (GOSS) for Q1 2025, worth a combined $187M — up 21% from $155M a quarter earlier.

Buyers outnumbered sellers: 23 funds opened new GOSS positions and 9 closed out — a net gain of 14 holders — while 35 added to existing stakes and 30 trimmed.

The largest buyer was Susquehanna International Group, adding an estimated $2.7M. The largest seller was Alyeska Investment Group, cutting an estimated $5.37M.

  • 118 institutional investors held Gossamer Bio (GOSS) as of Q1 2025, up from 105 in Q4 2024.
  • Funds reported $187M of Gossamer Bio stock for Q1 2025, up 21% quarter-over-quarter.
  • 23 funds opened new Gossamer Bio positions in Q1 2025 and 9 closed out, a net change of +14 holders.
  • The largest Gossamer Bio buyer in Q1 2025 was Susquehanna International Group, an estimated $2.7M added.
  • The largest Gossamer Bio seller in Q1 2025 was Alyeska Investment Group, an estimated $5.37M sold.

Based on aggregated 13F filings for Q1 2025.