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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
Rafferty Asset Management
201
Rafferty Asset Management
New York
-$970K -312,804 Closed
MAM
202
Monaco Asset Management
Monaco
-$959K -309,211 Closed
EI
203
EAM Investors
California
-$863K -278,422 Closed
JG
204
Jain Global
New York
-$862K -278,189 Closed
AI
205
Atom Investors
Texas
-$637K -205,639 Closed
SCM
206
Stonepine Capital Management
Oregon
-$635K -204,770 Closed
Jane Street
207
Jane Street
New York
-$245K -155,591 Closed
PCM
208
Prelude Capital Management
New York
-$422K -136,200 Closed
BHCM
209
Brevan Howard Capital Management
Jersey
-$395K -127,299 Closed
PA
210
Profund Advisors
Maryland
-$361K -116,503 Closed
SPS
211
Susquehanna Portfolio Strategies
Pennsylvania
-$345K -111,350 Closed
EC
212
EntryPoint Capital
New York
-$326K -105,085 Closed
HWM
213
HB Wealth Management
Georgia
-$297K -95,924 Closed
LIP
214
Lighthouse Investment Partners
Florida
-$287K -92,500 Closed
MIM
215
MetLife Investment Management
New Jersey
-$266K -85,645 Closed
VC
216
VarCov Co
Connecticut
-$260K -83,868 Closed
VCM
217
Voleon Capital Management
California
-$187K -60,235 Closed
Lazard Asset Management
218
Lazard Asset Management
New York
-$176K -56,668 Closed
EGM
219
Engineers Gate Manager
New York
-$159K -51,129 Closed
GCM
220
Graham Capital Management
Connecticut
-$113K -36,467 Closed
MP
221
Mangrove Partners
Connecticut
-$95.3K -30,747 Closed
CIAM
222
Caitong International Asset Management
Hong Kong
-$84K -27,091 Closed
TSS
223
Two Sigma Securities
New York
-$83.9K -27,056 Closed
State of Wisconsin Investment Board
224
State of Wisconsin Investment Board
Wisconsin
-$81.5K -26,304 Closed
Nomura Holdings
225
Nomura Holdings
Japan
-$25.1K -16,000 Closed