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Gossamer Bio

184 hedge funds and large institutions have $56.3M invested in Gossamer Bio in 2026 Q1 according to their latest regulatory filings, with 46 funds opening new positions, 71 increasing their positions, 49 reducing their positions, and 53 closing their positions.

New
Increased
Maintained
Reduced
Closed

558% more call options, than puts

Call options by funds: $1.24M | Put options by funds: $189K

45% more repeat investments, than reductions

Existing positions increased: 71 | Existing positions reduced: 49

6% less funds holding

Funds holding: 195184 (-11)

9.24% less ownership

Funds ownership: 81.58%72.34% (-9.2%)

13% less first-time investments, than exits

New positions opened: 46 | Existing positions closed: 53

67% less funds holding in top 10

Funds holding in top 10: 31 (-2)

90% less capital invested

Capital invested by funds: $585M → $56.3M (-$529M)

Holders
184
Holders Change
-11
Holders Change %
-5.64%
% of All Funds
2.27%
Holding in Top 10
1
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-66.67%
% of All Funds
0.01%
New
46
Increased
71
Reduced
49
Closed
53
Calls
$1.24M
Puts
$189K
Net Calls
+$1.05M
Net Calls Change
-$20.4M
Name Holding Trade Value Shares
Change
Change in
Stake
BlackRock
1
BlackRock
New York
$5.53M -$362K -230,183 -1%
KCM
2
Kalehua Capital Management
Texas
$3.36M +$16.1M +10,236,293 New
AQR Capital Management
3
AQR Capital Management
Connecticut
$3.33M +$14.2M +9,007,657 +805%
VCM
4
Vanguard Capital Management
Pennsylvania
$3.09M +$14.8M +9,394,593 New
AVM
5
Arch Venture Management
Illinois
$2.65M
OCA
6
Octagon Capital Advisors
New York
$2.55M -$9.69M -6,165,371 -44%
SB
7
Samsara BioCapital
California
$2.37M
Balyasny Asset Management
8
Balyasny Asset Management
Illinois
$1.95M +$6.92M +4,405,607 +290%
Acadian Asset Management
9
Acadian Asset Management
Massachusetts
$1.73M +$1.35M +861,001 +19%
SL
10
Siren LLC
Connecticut
$1.71M
6CM
11
683 Capital Management
New York
$1.64M -$300K -190,800 -4%
HA
12
HHLR Advisors
Cayman Islands
$1.63M
Geode Capital Management
13
Geode Capital Management
Massachusetts
$1.62M +$105K +66,977 +1%
Qube Research & Technologies (QRT)
14
Qube Research & Technologies (QRT)
United Kingdom
$1.62M +$6.88M +4,377,196 +810%
Two Sigma Investments
15
Two Sigma Investments
New York
$1.57M +$2.17M +1,383,741 +41%
State Street
16
State Street
Massachusetts
$1.44M -$7.74M -4,922,860 -53%
Corient Private Wealth
17
Corient Private Wealth
Florida
$1.31M -$5.83M -3,706,387 -48%
Squarepoint
18
Squarepoint
New York
$1.12M +$4.99M +3,177,166 +1,434%
GCP
19
GSA Capital Partners
United Kingdom
$1.07M +$5.03M +3,202,373 +6,175%
Bank of America
20
Bank of America
North Carolina
$1.04M +$1.99M +1,267,056 +66%
Barclays
21
Barclays
United Kingdom
$1.01M +$3.91M +2,489,273 +432%
VPM
22
Vanguard Portfolio Management
Pennsylvania
$711K +$3.4M +2,161,079 New
Alyeska Investment Group
23
Alyeska Investment Group
Illinois
$674K +$1.8M +1,142,355 +126%
UBS Group
24
UBS Group
Switzerland
$620K +$176K +112,202 +6%
AllianceBernstein
25
AllianceBernstein
Tennessee
$590K