Skip to main content

IOBTQ · IO Biotech, Inc. · Shareholders & Ownership

Track IOBTQ — free
$0.00 At close · Oct 20
Market Cap
$7,194
Shares
71.95M
Volume · Oct 20 1200 Avg daily vol (3M) 18.77K

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
1
Lundbeckfond Invest A/S
13D CIK 1591046 · Unknown · Mar 31, 2026
Item 4 purpose: Strategic alternatives
21,851,920
2
Vivo Capital IX, LLC
13G CIK 1750698 · Unknown · Sep 30, 2025
Rule 13d-1(c), passive investor
3,157,894
3
Samsara BioCapital, L.P.
13G CIK 1699737 · Unknown · Dec 31, 2024
Rule 13d-1(c), passive investor
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
Sullivan Amy
Insider CIK 1887865 · Dec 23, 2024
Chief Financial Officer, issuer-wide, not summed
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
Hunter Heidi
Insider CIK 1891841 · May 30, 2025
Director, issuer-wide, not summed
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.

Key facts CIK 1865494 CUSIP 449778109 Visit website Investor relations