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CSS LLC’s Gossamer Bio GOSS Stock Holding History

CSS 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 		$821 Buy
+2,500
New +$3.93K ﹤0.01% 958
2022
Q4 		– Sell
-28,200
Closed -$338K – 1009
2022
Q3 		$338K Sell
28,200
-600
-2% -$7.45K 0.02% 627
2022
Q2 		$241K Buy
+28,800
New +$223K 0.01% 773
2020
Q2 		– Sell
-27,400
Closed -$277K – 696
2020
Q1 		$277K Buy
27,400
+26,800
+4,467% +$350K 0.02% 384
2019
Q4 		$9K Buy
+600
New +$12.1K ﹤0.01% 629

Other funds holding GOSS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $141M AUM
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 $77.1B AUM 42.89% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 1-Year Est. Return

CSS LLC's GOSS Position: Q1 2026 in Review

CSS LLC opened a new position in Gossamer Bio (GOSS) in Q1 2026: 30,000 shares worth $9.86K. The stake represents ﹤0.01% of the portfolio and ranks #933 among its holdings. This is a return to the name: CSS LLC previously reported a position in GOSS as recently as Q1 2020.

CSS LLC first reported a position in GOSS in Q1 2020 and has held it in 2 quarters since. The position peaked at $102K in Q1 2020. 184 funds tracked by Wall St. Rank hold GOSS as of Q1 2026.

  • CSS LLC held 30,000 shares of Gossamer Bio worth $9.86K as of Q1 2026.
  • Gossamer Bio was a new CSS LLC position in Q1 2026.
  • Gossamer Bio made up ﹤0.01% of CSS LLC's portfolio in Q1 2026, its #933 holding.
  • CSS LLC first reported a position in Gossamer Bio in Q1 2020 and has held it in 2 quarters since.
  • CSS LLC's Gossamer Bio position peaked at $102K in Q1 2020.
  • 184 funds tracked by Wall St. Rank held Gossamer Bio as of Q1 2026.

Based on CSS LLC's 13F filing for Q1 2026, filed 15 May 2026.