SEI Investments
GOSS icon

SEI Investments’s Gossamer Bio GOSS Stock Holding History

SEI Investments’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 		$10.4K Sell
31,520
-197,376
-86% -$310K ﹤0.01% 3227
2025
Q4 		$710K Buy
228,896
+167,710
+274% +$479K ﹤0.01% 2340
2025
Q3 		$161K Buy
+61,186
New +$135K ﹤0.01% 2658
2022
Q4 		– Sell
-37,014
Closed -$443K – 2597
2022
Q3 		$443K Buy
+37,014
New +$459K ﹤0.01% 2144

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

SEI Investments's GOSS Position: Q1 2026 in Review

SEI Investments reduced its Gossamer Bio (GOSS) stake by 86% in Q1 2026, selling an estimated $310K and leaving 31,520 shares worth $10.4K. The position accounts for ﹤0.01% of the portfolio, ranked #3227.

SEI Investments first reported a position in GOSS in Q3 2022 and has held it in 4 quarters since. The position peaked at $710K in Q4 2025. 184 funds tracked by Wall St. Rank hold GOSS as of Q1 2026.

  • SEI Investments held 31,520 shares of Gossamer Bio worth $10.4K as of Q1 2026.
  • SEI Investments sold 197,376 Gossamer Bio shares in Q1 2026, an estimated $310K.
  • Gossamer Bio made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #3227 holding.
  • SEI Investments first reported a position in Gossamer Bio in Q3 2022 and has held it in 4 quarters since.
  • SEI Investments's Gossamer Bio position peaked at $710K in Q4 2025.
  • 184 funds tracked by Wall St. Rank held Gossamer Bio as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.