Ken Griffin
GOSS icon

Ken Griffin’s Gossamer Bio GOSS Stock Holding History

Ken Griffin’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 		$56.2K Sell
171,200
-100
-0.1% -$157 ﹤0.01% 12358
2025
Q4 		$531K Buy
171,300
+82,200
+92% +$235K ﹤0.01% 8880
2025
Q3 		$234K Buy
89,100
+31,700
+55% +$69.9K ﹤0.01% 10890
2025
Q2 		$70.6K Sell
57,400
-400
-0.7% -$436 ﹤0.01% 11580
2025
Q1 		$63.6K Sell
57,800
-23,300
-29% -$26.9K ﹤0.01% 12041
2024
Q4 		$73.4K Buy
81,100
+28,800
+55% +$24.7K ﹤0.01% 11904
2024
Q3 		$51.6K Sell
52,300
-5,900
-10% -$5.68K ﹤0.01% 11872
2024
Q2 		$52.4K Buy
58,200
+50,400
+646% +$37.7K ﹤0.01% 11706
2024
Q1 		$9.2K Buy
7,800
+2,300
+42% +$2.53K ﹤0.01% 13514
2023
Q4 		$5.02K Sell
5,500
-700
-11% -$517 ﹤0.01% 13464
2023
Q3 		$5.16K Sell
6,200
-3,800
-38% -$4.38K ﹤0.01% 13417
2023
Q2 		$12K Sell
10,000
-31,300
-76% -$39K ﹤0.01% 13105
2023
Q1 		$52K Sell
41,300
-63,100
-60% -$121K ﹤0.01% 12096
2022
Q4 		$227K Buy
104,400
+78,500
+303% +$646K ﹤0.01% 9895
2022
Q3 		$310K Buy
+25,900
New +$321K ﹤0.01% 9499
2022
Q2 		– Sell
-36,200
Closed -$314K – 13320
2022
Q1 		$314K Buy
36,200
+20,900
+137% +$202K ﹤0.01% 10492
2021
Q4 		$173K Buy
+15,300
New +$182K ﹤0.01% 12068
2021
Q3 		– Sell
-259,700
Closed -$2.11M – 14103
2021
Q2 		$2.11M Sell
259,700
-400
-0.2% -$3.47K ﹤0.01% 6484
2021
Q1 		$2.41M Buy
260,100
+222,300
+588% +$2.24M ﹤0.01% 5966
2020
Q4 		$366K Buy
37,800
+7,200
+24% +$70.9K ﹤0.01% 8723
2020
Q3 		$380K Buy
30,600
+17,900
+141% +$237K ﹤0.01% 7754
2020
Q2 		$165K Buy
12,700
+900
+8% +$11.3K ﹤0.01% 8673
2020
Q1 		$120K Sell
11,800
-49,200
-81% -$642K ﹤0.01% 8492
2019
Q4 		$953K Sell
61,000
-211,800
-78% -$4.27M ﹤0.01% 5672
2019
Q3 		$4.58M Buy
+272,800
New +$5.42M ﹤0.01% 3236

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 $4.68T 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 $84.2B AUM 55.88% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return

Ken Griffin's GOSS Position: Q1 2026 in Review

Ken Griffin sold out of Gossamer Bio (GOSS) in Q1 2026, closing a stake of 704,787 shares — an estimated $1.11M sold.

Ken Griffin first reported a position in GOSS in Q1 2019 and held it in 27 quarters. The position peaked at $21.2M in Q4 2021. 185 funds tracked by Wall St. Rank hold GOSS as of Q1 2026.

  • Ken Griffin reported no remaining Gossamer Bio position as of Q1 2026 after selling out during the quarter.
  • Ken Griffin sold 704,787 Gossamer Bio shares in Q1 2026, an estimated $1.11M.
  • Ken Griffin first reported a position in Gossamer Bio in Q1 2019 and held it in 27 quarters.
  • Ken Griffin's Gossamer Bio position peaked at $21.2M in Q4 2021.
  • 185 funds tracked by Wall St. Rank held Gossamer Bio as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.