Io BiotechIOBTQ
13F holders, Q1 2026 (March 31)12holders −10
2new positions
12sold out
1famous investor
$0.06avg. 13F price*
At the end of Q1 2026, 12 institutions reported holding Io Biotech Inc. (IOBTQ) in their 13F filings, down 10 from Q4 2025. 2 opened new positions and 12 sold out. The largest holders were Ikarian Capital, LLC ($81K), Boothbay Fund Management, LLC ($27K) and Gsa Capital Partners LLP ($20K). One famous investor held it Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Io Biotech Inc.
- CUSIP
- 449778109
- Latest filing quarter
- Q1 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $23K |
| Exits | 12 | $2.6M |
All 13F filers, Q4 2025 → Q1 2026: 711,696 shares bought and 5,168,298 shares sold, net −4,456,602 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 12 holders
| Ikarian Capital, LLC | 0.01% | No change | 1,386,565 | $81K |
| Boothbay Fund Management, LLC | 0.00% | No change | 451,852 | $27K |
| Gsa Capital Partners LLP | 0.00% | New | 348,352 | $20K |
| Marshall Wace, LLP | 0.00% | Reduce -29.8% | 301,291 | $18K |
| XTX Topco Ltd | 0.00% | Add +1575.4% | 265,792 | $16K |
| Morgan Stanley | 0.00% | Reduce -61.8% | 206,215 | $12K |
| Millennium Management | 0.00% | Add +40.0% | 194,158 | $11K |
| Citigroup Inc. | 0.00% | Reduce -35.0% | 72,495 | $4K |
| Jane Street Group, LLC | 0.00% | New | 57,974 | $3K |
| Beacon Pointe Advisors, LLC | 0.00% | Reduce -91.6% | 42,600 | $3K |
| Geode Capital Management, LLC | 0.00% | No change | 33,307 | $2K |
| UBS Group AG | 0.00% | Reduce -28.9% | 30,980 | $2K |
"% of holder's portfolio" is IOBTQ's weight in each manager's 13F, not the share of Io Biotech Inc. the manager owns.