IO Biotech IOBTQ Insider Ownership

IOBTQ
$0.00 +0.00 (+0.00%)
At close: Sep 25, 2026 · 4:00 PM EDT

Insider Holdings by Owner

49.26Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
78.13%
■0% pp QoQ
Shares Held by Insiders
52.30Mn
filed for Sep 2026
■0.00% QoQ
Shares Outstanding
66.94Mn
66,941,964 shares
Direct Holdings
29.93Mn
Indirect: 22.37Mn
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
14
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

IO Biotech's three largest insider shareholders as of September 29, 2026 are Invest A/S Lundbeckfond (Director, 13.95Mn shares), Christian E Elling (Director, 13.95Mn shares), Holdings A/S Novo (TenPercentOwner, 5.71Mn shares).

Form 4 Holdings

Insiders Holding IOBTQ

Insiders 14
Shares held 49.26Mn
Of outstanding 73.58%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Christian E Elling Director, TenPercentOwner 0 13,950,686 13,950,686 28.3% 11 Aug, 2023
2 Invest A/S Lundbeckfond Director, TenPercentOwner 13,950,686 0 13,950,686 28.3% 11 Aug, 2023
3 Holdings A/S Novo TenPercentOwner 10,061,916 0 10,061,916 20.4% 26 Jul, 2024
4 Capital Ix, Llc Vivo TenPercentOwner 0 3,157,894 3,157,894 6.4% 10 Aug, 2023
5 Jack Nielsen Director 0 3,015,545 3,015,545 6.1% 12 Nov, 2021
6 Healthcare Investments (Cayman) Ltd. Hbm TenPercentOwner 2,690,545 0 2,690,545 5.5% 12 Nov, 2021
7 Claus A. Andersson Director 0 1,791,490 1,791,490 3.6% 12 Nov, 2021
8 Vanessa Malier Director 0 430,477 430,477 0.9% 12 Nov, 2021
9 Amy Sullivan Chief Financial Officer 84,632 0 84,632 0.2% 23 Dec, 2024
10 Mai-Britt Zocca Chief Executive Officer 49,891 0 49,891 0.1% 23 Dec, 2024
11 Qasim Iftikhar Ahmad Chief Medical Officer 31,350 0 31,350 0.1% 26 Dec, 2024
12 Devin Whittemore Smith General Counsel 16,938 0 16,938 0.0% 23 Dec, 2024
13 Heidi Hunter Director 15,000 0 15,000 0.0% 02 Jun, 2025
14 Brian Burkavage Chief Accounting Officer 11,500 0 11,500 0.0% 24 Nov, 2023

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

105 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
05 Jun, 2025 David V Smith Director Acquired A 35,144 $0.00 $0 35,144 Direct
05 Jun, 2025 Helen Louise Collins Director Acquired A 35,144 $0.00 $0 35,144 Direct
05 Jun, 2025 Kathleen Sereda Glaub Director Acquired A 35,144 $0.00 $0 35,144 Direct
05 Jun, 2025 Heidi Hunter Director Acquired A 35,144 $0.00 $0 35,144 Direct
05 Jun, 2025 Peter Hirth Director Acquired A 35,144 $0.00 $0 35,144 Direct
05 Jun, 2025 Christian E Elling Director Acquired A 35,144 $0.00 $0 35,144 Direct
30 May, 2025 Heidi Hunter Director Acquired P 15,000 $1.39 $20.88K 15,000 Direct
02 Apr, 2025 Amy Sullivan Chief Financial Officer Acquired A 215,000 $0.00 $0 215,000 Direct
02 Apr, 2025 Qasim Iftikhar Ahmad Chief Medical Officer Acquired A 215,000 $0.00 $0 215,000 Direct
02 Apr, 2025 Brian Burkavage Chief Accounting Officer Acquired A 65,000 $0.00 $0 65,000 Direct
02 Apr, 2025 Devin Whittemore Smith General Counsel Acquired A 140,000 $0.00 $0 140,000 Direct
02 Apr, 2025 Mai-Britt Zocca Chief Executive Officer Acquired A 580,000 $0.00 $0 580,000 Direct
23 Dec, 2024 Qasim Iftikhar Ahmad Chief Medical Officer Acquired P 31,350 $0.85 $26.55K 31,350 Direct
23 Dec, 2024 Amy Sullivan Chief Financial Officer Acquired P 10,250 $0.83 $8.48K 84,632 Direct
23 Dec, 2024 Mai-Britt Zocca Chief Executive Officer Acquired P 12,500 $0.81 $10.12K 49,891 Direct
23 Dec, 2024 Devin Whittemore Smith General Counsel Acquired P 12,000 $0.81 $9.72K 16,938 Direct
25 Jul, 2024 Holdings A/S Novo TenPercentOwner Disposed S 51,522 $1.33 $68.34K 4,377,927 Direct
26 Jul, 2024 Holdings A/S Novo TenPercentOwner Disposed S 23,478 $1.31 $30.79K 4,354,449 Direct
06 Jun, 2024 Helen Louise Collins Director Acquired A 45,642 $0.00 $0 45,642 Direct
06 Jun, 2024 Kathleen Sereda Glaub Director Acquired A 45,642 $0.00 $0 45,642 Direct