Ken Griffin
IOBT

Ken Griffin’s IO Biotech IOBT Stock Holding History

Ken Griffin’s Portfolio IOBT Stock Details IOBT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-28,866
Closed -$40.1K – 13410
2025
Q2 		$40.1K Sell
28,866
-16,689
-37% -$19.1K ﹤0.01% 11881
2025
Q1 		$49.7K Sell
45,555
-224,949
-83% -$212K ﹤0.01% 12321
2024
Q4 		$249K Buy
+270,504
New +$269K ﹤0.01% 10041
2024
Q3 		– Sell
-86,894
Closed -$102K – 14705
2024
Q2 		$102K Buy
86,894
+28,272
+48% +$39.5K ﹤0.01% 10900
2024
Q1 		$103K Buy
58,622
+6,755
+13% +$11.7K ﹤0.01% 11328
2023
Q4 		$97.5K Buy
+51,867
New +$61.8K ﹤0.01% 10965
2023
Q3 		– Sell
-37,690
Closed -$73.9K – 14672
2023
Q2 		$73.9K Sell
37,690
-9,152
-20% -$17.9K ﹤0.01% 11329
2023
Q1 		$87.6K Buy
+46,842
New +$117K ﹤0.01% 11446
2022
Q4 		– Sell
-42,180
Closed -$114K – 15156
2022
Q3 		$114K Buy
42,180
+27,754
+192% +$103K ﹤0.01% 10982
2022
Q2 		$67K Buy
+14,426
New +$88.3K ﹤0.01% 11736
2022
Q1 		– Sell
-13,060
Closed -$86K – 14078
2021
Q4 		$86K Buy
+13,060
New +$126K ﹤0.01% 12859

Other funds holding IOBT

NHAS
Novo Holdings A/S Hellerup, Denmark $1.23B AUM 81.32% 1-Year Est. Return
IC
Ikarian Capital Dallas, Texas $1.23B AUM 600.17% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
BFM
Boothbay Fund Management New York $7.71B AUM 106.29% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return
XT
XTX Topco George Town, Cayman Islands $5.75B AUM 30.56% 1-Year Est. Return

Ken Griffin's IOBT Position: Q3 2025 in Review

Ken Griffin sold out of IO Biotech (IOBT) in Q3 2025, closing a stake of 28,866 shares — an estimated $40.1K sold.

Ken Griffin first reported a position in IOBT in Q4 2021 and held it in 11 quarters. The position peaked at $249K in Q4 2024. 21 funds tracked by Wall St. Rank hold IOBT as of Q3 2025.

  • Ken Griffin reported no remaining IO Biotech position as of Q3 2025 after selling out during the quarter.
  • Ken Griffin sold 28,866 IO Biotech shares in Q3 2025, an estimated $40.1K.
  • Ken Griffin first reported a position in IO Biotech in Q4 2021 and held it in 11 quarters.
  • Ken Griffin's IO Biotech position peaked at $249K in Q4 2024.
  • 21 funds tracked by Wall St. Rank held IO Biotech as of Q3 2025.

Based on Citadel Advisors's 13F filing for Q3 2025, filed 14 Nov 2025.