Jim Simons
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Jim Simons’s Gossamer Bio GOSS Stock Holding History

Jim Simons’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 		$400K Buy
1,217,868
+558,980
+85% +$879K ﹤0.01% 2692
2025
Q4 		$2.04M Sell
658,888
-2,321,300
-78% -$6.62M ﹤0.01% 1848
2025
Q3 		$7.84M Buy
2,980,188
+247,894
+9% +$546K 0.01% 1210
2025
Q2 		$3.36M Buy
2,732,294
+1,163,139
+74% +$1.27M ﹤0.01% 1774
2025
Q1 		$1.73M Sell
1,569,155
-143,348
-8% -$166K ﹤0.01% 2101
2024
Q4 		$1.55M Sell
1,712,503
-32,302
-2% -$27.7K ﹤0.01% 2215
2024
Q3 		$1.72M Sell
1,744,805
-301,795
-15% -$290K ﹤0.01% 2122
2024
Q2 		$1.84M Buy
2,046,600
+1,375,000
+205% +$1.03M ﹤0.01% 1926
2024
Q1 		$792K Sell
671,600
-325,401
-33% -$358K ﹤0.01% 2633
2023
Q4 		$910K Buy
+997,001
New +$736K ﹤0.01% 2469
2022
Q4 		– Sell
-35,800
Closed -$429K – 4219
2022
Q3 		$429K Sell
35,800
-33,100
-48% -$411K ﹤0.01% 3017
2022
Q2 		$577K Sell
68,900
-63,200
-48% -$490K ﹤0.01% 3074
2022
Q1 		$1.15M Buy
132,100
+88,400
+202% +$853K ﹤0.01% 2647
2021
Q4 		$494K Buy
+43,700
New +$519K ﹤0.01% 3080
2021
Q2 		– Sell
-150,000
Closed -$1.39M – 3577
2021
Q1 		$1.39M Sell
150,000
-32,800
-18% -$331K ﹤0.01% 2442
2020
Q4 		$1.77M Sell
182,800
-152,800
-46% -$1.51M ﹤0.01% 2196
2020
Q3 		$4.17M Sell
335,600
-28,000
-8% -$371K ﹤0.01% 1674
2020
Q2 		$4.73M Buy
363,600
+266,138
+273% +$3.35M ﹤0.01% 1676
2020
Q1 		$989K Buy
+97,462
New +$1.27M ﹤0.01% 2431

Other funds holding GOSS

BlackRock
BlackRock New York $6.73T AUM 46.02% 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

Jim Simons's GOSS Position: Q1 2026 in Review

Jim Simons increased its Gossamer Bio (GOSS) stake by 85% in Q1 2026, buying an estimated $879K and bringing the position to 1,217,868 shares worth $400K. The position accounts for ﹤0.01% of the portfolio, ranked #2692.

Jim Simons first reported a position in GOSS in Q1 2020 and has held it in 19 quarters since. The position peaked at $7.84M in Q3 2025. 185 funds tracked by Wall St. Rank hold GOSS as of Q1 2026.

  • Jim Simons held 1,217,868 shares of Gossamer Bio worth $400K as of Q1 2026.
  • Jim Simons bought 558,980 Gossamer Bio shares in Q1 2026, an estimated $879K.
  • Gossamer Bio made up ﹤0.01% of Jim Simons's portfolio in Q1 2026, its #2692 holding.
  • Jim Simons first reported a position in Gossamer Bio in Q1 2020 and has held it in 19 quarters since.
  • Jim Simons's Gossamer Bio position peaked at $7.84M in Q3 2025.
  • 185 funds tracked by Wall St. Rank held Gossamer Bio as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.