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Siren LLC’s Gossamer Bio GOSS Stock Holding History

Siren LLC’s Portfolio GOSS Stock Details GOSS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.71M Hold
5,208,968
– – 0.05% 91
2025
Q4 		$16.1M Hold
5,208,968
– – 0.48% 42
2025
Q3 		$13.7M Hold
5,208,968
– – 0.54% 42
2025
Q2 		$6.41M Hold
5,208,968
– – 0.33% 52
2025
Q1 		$5.73M Hold
5,208,968
– – 0.32% 53
2024
Q4 		$4.71M Sell
5,208,968
-8,072,642
-61% -$6.92M 0.21% 65
2024
Q3 		$13.1M Buy
+13,281,610
New +$12.8M 0.66% 39

Other funds holding GOSS

BlackRock
BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return
KCM
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AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AVM
Arch Venture Management Chicago, Illinois $677M AUM 322.07% 1-Year Est. Return
OCA
Octagon Capital Advisors New York $904M AUM 737.04% 1-Year Est. Return
SB
Samsara BioCapital Palo Alto, California $1.03B AUM 214.94% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $50.9B AUM 42.89% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
6CM
683 Capital Management New York $1.08B AUM 85.52% 1-Year Est. Return