Ken Griffin
GBIO

Ken Griffin’s Generation Bio GBIO Stock Holding History

Ken Griffin’s Portfolio GBIO Stock Details GBIO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-11,560
Closed -$37K – 13243
2025
Q2 		$37K Buy
11,560
+4,520
+64% +$17.4K ﹤0.01% 11907
2025
Q1 		$28.5K Buy
7,040
+6,480
+1,157% +$45.5K ﹤0.01% 12870
2024
Q4 		$5.94K Buy
+560
New +$9.98K ﹤0.01% 13831
2024
Q3 		– Sell
-10
Closed -$282 – 14563
2024
Q2 		$282 Sell
10
-780
-99% -$25.3K ﹤0.01% 14041
2024
Q1 		$32.2K Buy
790
+490
+163% +$11.5K ﹤0.01% 12629
2023
Q4 		$4.95K Buy
300
+120
+67% +$2.09K ﹤0.01% 13467
2023
Q3 		$6.82K Buy
180
+80
+80% +$3.79K ﹤0.01% 13293
2023
Q2 		$5.5K Sell
100
-930
-90% -$42.7K ﹤0.01% 13496
2023
Q1 		$44.3K Buy
1,030
+1,010
+5,050% +$48.9K ﹤0.01% 12319
2022
Q4 		$786 Buy
+20
New +$1.05K ﹤0.01% 14582
2021
Q4 		– Sell
-860
Closed -$216K – 14145
2021
Q3 		$216K Buy
+860
New +$206K ﹤0.01% 11826

Other funds holding GBIO

ACM
Accent Capital Management Centerville, Ohio $231M AUM 33.86% 1-Year Est. Return

Ken Griffin's GBIO Position: Q1 2026 in Review

Ken Griffin sold out of Generation Bio (GBIO) in Q1 2026, closing a stake of 47,245 shares — an estimated $268K sold.

Ken Griffin first reported a position in GBIO in Q2 2020 and held it in 19 quarters. The position peaked at $11.4M in Q2 2020. 2 funds tracked by Wall St. Rank hold GBIO as of Q1 2026.

  • Ken Griffin reported no remaining Generation Bio position as of Q1 2026 after selling out during the quarter.
  • Ken Griffin sold 47,245 Generation Bio shares in Q1 2026, an estimated $268K.
  • Ken Griffin first reported a position in Generation Bio in Q2 2020 and held it in 19 quarters.
  • Ken Griffin's Generation Bio position peaked at $11.4M in Q2 2020.
  • 2 funds tracked by Wall St. Rank held Generation Bio as of Q1 2026.

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