IOBTQ · IO Biotech, Inc. · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“Our recurring losses from operations raise substantial doubt about our ability to continue as a going concern. As a result, the financial statements accompanying this Quarterly Report on Form 10-Q include a statement that there is substantial doubt about our ability to continue as a going concern for one year after the date the financial statements were issued, and these financial statements do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the outcome of this uncertainty.”View the 10-Q filed Nov 14, 2025
Every disclosed holder of IOBTQ in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns IOBTQ
13F quarter Mar 31, 2026| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 3,391,581 | 4.71% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 34,388,655 | 47.80% |
| Remaining | 34,168,606 | 47.49% |
| Registered funds (N-PORT, not summed) | 0 | 0.00% |
Shares outstanding: 71,948,842, the issuer's latest cover-page count restated onto today's split basis.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of IOBTQ
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Lundbeckfond Invest A/S
13D
CIK 1591046 · Unknown · Mar 31, 2026
Item 4 purpose: Strategic alternatives
|
21,851,920 | ||
| 2 |
|
3,157,894 | ||
| 3 |
|
2,631,578 | ||
| 4 |
NOVO HOLDINGS A/S
13D
CIK 1388325 · Unknown · Jan 21, 2026
|
2,469,135 | ||
| 5 |
HBM Healthcare Investments (Cayman) Ltd.
13G
CIK 1232258 · Unknown · Apr 2, 2026
Rule 13d-1(d), exempt investor
|
2,433,943 | ||
| 6 |
BANK OF AMERICA CORP /DE/
13G
CIK 70858 · Bank · Dec 31, 2023
|
1,844,185 | ||
| 7 |
Ikarian Capital, LLC
13F
CIK 1778253 · Registered investment adviser · Mar 31, 2026
|
1,386,565 | ||
| 8 |
BOOTHBAY FUND MANAGEMENT, LLC
13F
CIK 1549230 · Registered investment adviser · Mar 31, 2026
|
451,852 | ||
| 9 |
GSA CAPITAL PARTNERS LLP
13F
CIK 1362033 · Registered investment adviser · Mar 31, 2026
|
348,352 | ||
| 10 |
MARSHALL WACE, LLP
13F
CIK 1318757 · Exempt reporting adviser · Mar 31, 2026
|
301,291 | ||
| 11 |
XTX Topco Ltd
13F
CIK 1828301 · Unknown · Mar 31, 2026
|
265,792 | ||
| 12 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Mar 31, 2026
|
206,215 | ||
| 13 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Mar 31, 2026
|
194,158 | ||
| 14 |
|
84,632 | ||
| 15 |
Zocca Mai-Britt
Insider
CIK 1890736 · Dec 23, 2024
Director, Chief Executive Officer, issuer-wide, not summed
|
76,471 | ||
| 16 |
CITIGROUP INC
13F
CIK 831001 · Bank · Mar 31, 2026
|
72,495 | ||
| 17 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Mar 31, 2026
|
57,974 | ||
| 18 |
Beacon Pointe Advisors, LLC
13F
CIK 1744317 · Registered investment adviser · Mar 31, 2026
|
42,600 | ||
| 19 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Mar 31, 2026
|
33,307 | ||
| 20 |
Ahmad Qasim Iftikhar
Insider
CIK 1985801 · Dec 23, 2024
Chief Medical Officer, issuer-wide, not summed
|
31,350 | ||
| 21 |
UBS Group AG
13F
CIK 1610520 · Bank · Mar 31, 2026
|
30,980 | ||
| 22 |
Smith Devin Whittemore
Insider
CIK 1747818 · Dec 23, 2024
SVP and General Counsel, issuer-wide, not summed
|
16,938 | ||
| 23 |
|
15,000 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.