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IOBT

IO Biotech
IOBT

Delisted

IOBT was delisted on the 6th of April, 2026.

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22 hedge funds and large institutions have $20.8M invested in IO Biotech in 2025 Q1 according to their latest regulatory filings, with 1 funds opening new positions, 3 increasing their positions, 8 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed

15% more capital invested

Capital invested by funds: $18.2M → $20.8M (+$2.67M)

0.95% less ownership

Funds ownership: 29.96% → 29.01% (-0.95%)

19% less funds holding

Funds holding: 27 → 22 (-5)

63% less repeat investments, than reductions

Existing positions increased: 3 | Existing positions reduced: 8

83% less first-time investments, than exits

New positions opened: 1 | Existing positions closed: 6

Holders
22
Holders Change
-5
Holders Change %
-18.52%
% of All Funds
0.29%
Holding in Top 10
1
Holding in Top 10 Change
+1
Holding in Top 10 Change %
% of All Funds
0.01%
New
1
Increased
3
Reduced
8
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Jane Street
Jane Street
New York
+$22.4K
2
XT
XTX Topco
Cayman Islands
+$21.2K
3
SAM
Sectoral Asset Management
Quebec, Canada
+$18.9K
4
Renaissance Technologies
Renaissance Technologies
New York
+$7.18K

Top Sellers

Rank Fund Capital Flow
1
Citadel Advisors
Citadel Advisors
Florida
-$212K
2
BCM
Bridgeway Capital Management
Texas
-$93.5K
3
Morgan Stanley
Morgan Stanley
New York
-$65.8K
4
DIG
Dauntless Investment Group
New Hampshire
-$62.5K
5
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
-$55K

IOBT Hedge Fund Activity: Q1 2025 in Review

22 of the 7,466 institutional investors tracked by Wall St. Rank reported a position in IO Biotech (IOBT) for Q1 2025, worth a combined $20.8M — up 15% from $18.2M a quarter earlier.

Sellers outnumbered buyers: 6 funds closed out of IOBT and 1 opened new positions — a net loss of 5 holders — while 8 trimmed existing stakes and 3 added.

The largest buyer was Jane Street, opening a new position worth an estimated $22.4K. The largest seller was Citadel Advisors, cutting an estimated $212K.

  • 22 institutional investors held IO Biotech (IOBT) as of Q1 2025, down from 27 in Q4 2024.
  • Funds reported $20.8M of IO Biotech stock for Q1 2025, up 15% quarter-over-quarter.
  • 1 fund opened new IO Biotech positions in Q1 2025 and 6 closed out, a net change of -5 holders.
  • The largest IO Biotech buyer in Q1 2025 was Jane Street, an estimated $22.4K added.
  • The largest IO Biotech seller in Q1 2025 was Citadel Advisors, an estimated $212K sold.

Based on aggregated 13F filings for Q1 2025.