IO BIOTECH INC (IOBTQ)
Institutional ownership reported to the SEC as of Q1 2026, across 18 quarters.
Institutions report 3,043,226 shares against 71,948,842 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Share count carried from an earlier filing (cy2025q3i).
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Ikarian Capital, LLC | $81.4K | 1,386,565 | 0.01% | 3q | HELD |
| BOOTHBAY FUND MANAGEMENT, LLC | $26.5K | 451,852 | 0.00% | 3q | HELD |
| MARSHALL WACE, LLP | $18.1K | 301,291 | 0.00% | 11q | -29.8%-$7.7K |
| XTX Topco Ltd | $15.6K | 265,792 | 0.00% | 6q | +1575.4%+$14.7K |
| MORGAN STANLEY | $12.1K | 206,215 | 0.00% | 18q | -61.8%-$19.5K |
| MILLENNIUM MANAGEMENT LLC | $11.4K | 194,158 | 0.00% | 3q | +40.0%+$3.3K |
| CITIGROUP INC | $4.3K | 72,495 | 0.00% | 4q | -35.0%-$2.3K |
| JANE STREET GROUP, LLC | $3.4K | 57,974 | 0.00% | new | NEW |
| Beacon Pointe Advisors, LLC | $2.5K | 42,600 | 0.00% | 2q | -91.6%-$27.2K |
| GEODE CAPITAL MANAGEMENT, LLC | $2.0K | 33,307 | 0.00% | 18q | HELD |
| UBS Group AG | $1.8K | 30,977 | 0.00% | 8q | -28.9% |
| GSA CAPITAL PARTNERS LLP | $20 | 348,352 | 0.00% | new | NEW |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q1 2026 | 11 | $179.0K | 3,043,226 | 1 | 2 | 5 | 0.0% |
| Q4 2025 | 21 | $4.8M | 7,829,105 | 5 | 3 | 7 | 0.0% |
| Q3 2025 | 20 | $3.6M | 9,856,812 | 8 | 5 | 5 | 0.0% |
| Q2 2025 | 25 | $25.2M | 18,159,341 | 5 | 5 | 7 | 0.0% |
| Q1 2025 | 21 | $20.8M | 19,080,759 | 1 | 3 | 7 | 0.0% |
| Q4 2024 | 25 | $18.1M | 19,664,523 | 9 | 1 | 3 | 0.0% |
| Q3 2024 | 17 | $24.7M | 23,531,632 | 2 | 3 | 3 | 0.0% |
| Q2 2024 | 21 | $32.4M | 26,721,876 | 3 | 4 | 4 | 3.6% |
| Q1 2024 | 18 | $56.5M | 31,614,178 | 3 | 3 | 4 | 3.0% |
| Q4 2023 | 18 | $61.3M | 31,593,503 | 3 | 3 | 5 | 3.0% |
| Q3 2023 | 18 | $43.1M | 29,644,279 | 8 | 4 | 0 | 3.2% |
| Q2 2023 | 14 | $23.8M | 12,177,679 | 3 | 2 | 1 | 0.0% |
| Q1 2023 | 15 | $25.9M | 13,835,936 | 2 | 1 | 2 | 0.0% |
| Q4 2022 | 11 | $25.7M | 11,166,502 | 0 | 3 | 4 | 0.0% |
| Q3 2022 | 20 | $41.6M | 15,335,530 | 5 | 3 | 3 | 0.0% |
| Q2 2022 | 18 | $72.2M | 15,453,557 | 5 | 3 | 3 | 0.0% |
| Q1 2022 | 19 | $76.9M | 14,858,852 | 4 | 2 | 2 | 0.0% |
| Q4 2021 | 20 | $92.6M | 15,038,466 | 20 | 0 | 0 | 0.0% |