Who owns IO Biotech, Inc., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Lundbeckfond Invest A/S: 27.4% · 21,851,920 shares
Chernett Jorey: 0.0% · 0 shares
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Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of IO Biotech, Inc. they hold. Together these 28 managers report 11.13% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| NOVO HOLDINGS A/S | $1.53M | 2,512,453 | 0.12% | 3.49% | December 31, 2025 |
| BANK OF AMERICA CORP /DE/ | $486K | 799,953 | 0.00% | 1.11% | December 31, 2025 |
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Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 3 funds hold 0.15% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| Ultra-Small Company Market Fund | $45.7K | 0.04% | 0.10% | December 31, 2025 |
| Fidelity Nasdaq Composite Index Fund | $11.6K | 0.00% | 0.05% | February 28, 2026 |
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