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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
Q2 		$857K Hold
5,208,968
– – 0.02% 114
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 0.65% 39

Other funds holding GOSS

D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
6CM
683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return
DIG
DeepCurrents Investment Group New York $3.3B AUM 12.57% 1-Year Est. Return
CCM
Context Capital Management Lajolla, California $5.15B AUM 1.28% 1-Year Est. Return
WVP
Worth Venture Partners Fort Lee, New Jersey $44.3M AUM 34.55% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
GCP
GSA Capital Partners London, United Kingdom $1.59B AUM 39.81% 1-Year Est. Return
WAM
Wolverine Asset Management Chicago, Illinois $11.4B AUM 5.65% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $174M AUM

Siren LLC's GOSS Position: Q2 2026 in Review

Siren LLC held its Gossamer Bio (GOSS) position steady in Q2 2026 at 5,208,968 shares worth $857K. The position accounts for 0.02% of the portfolio, ranked #114.

Siren LLC first reported a position in GOSS in Q3 2024 and has held it in 8 quarters since. The position peaked at $16.1M in Q4 2025. 170 funds tracked by Wall St. Rank hold GOSS as of Q2 2026.

  • Siren LLC held 5,208,968 shares of Gossamer Bio worth $857K as of Q2 2026.
  • Siren LLC left its Gossamer Bio share count unchanged in Q2 2026.
  • Gossamer Bio made up 0.02% of Siren LLC's portfolio in Q2 2026, its #114 holding.
  • Siren LLC first reported a position in Gossamer Bio in Q3 2024 and has held it in 8 quarters since.
  • Siren LLC's Gossamer Bio position peaked at $16.1M in Q4 2025.
  • 170 funds tracked by Wall St. Rank held Gossamer Bio as of Q2 2026.

Based on Siren LLC's 13F filing for Q2 2026, filed 13 Aug 2026.