IO Biotech's top three insider shareholders as of April 28, 2026 are Christian E Elling (Director, 13.95Mn shares), Invest A/S Lundbeckfond (Director, 13.95Mn shares), Holdings A/S Novo (TenPercentOwner, 5.71Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Invest A/S Lundbeckfond | - | 13,950,686 | 0 | 11 Aug, 2023 |
| Christian E Elling | - | 0 | 13,950,686 | 11 Aug, 2023 |
| Holdings A/S Novo | - | 5,707,467 | 0 | 11 Aug, 2023 |
| Holdings A/S Novo | - | 4,354,449 | 0 | 26 Jul, 2024 |
| Capital Ix, Llc Vivo | - | 0 | 3,157,894 | 10 Aug, 2023 |
| Capital Ix, Llc Vivo | - | 3,015,545 | 0 | 12 Nov, 2021 |
| Jack Nielsen | - | 0 | 3,015,545 | 12 Nov, 2021 |
| Healthcare Investments (Cayman) Ltd. Hbm | - | 2,690,545 | 0 | 12 Nov, 2021 |
| Claus A. Andersson | - | 0 | 1,791,490 | 12 Nov, 2021 |
| Vanessa Malier | - | 0 | 430,477 | 12 Nov, 2021 |
| Amy Sullivan | Chief Financial Officer | 84,632 | 0 | 23 Dec, 2024 |
| Mai-Britt Zocca | Chief Executive Officer | 49,891 | 0 | 23 Dec, 2024 |
| Qasim Iftikhar Ahmad | Chief Medical Officer | 31,350 | 0 | 26 Dec, 2024 |
| Mai-Britt Zocca | Chief Executive Officer | 0 | 26,580 | 12 Nov, 2021 |
| Heidi Hunter | - | 15,000 | 0 | 02 Jun, 2025 |
| Brian Burkavage | Chief Accounting Officer | 11,500 | 0 | 24 Nov, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 05 Jun, 2025 | Heidi Hunter | Stock Option (Right to Buy) | A | 35,144 | $0.00 | 35,144 | D | A |
| 05 Jun, 2025 | Helen Louise Collins | Stock Option (Right to Buy) | A | 35,144 | $0.00 | 35,144 | D | A |
| 05 Jun, 2025 | Kathleen Sereda Glaub | Stock Option (Right to Buy) | A | 35,144 | $0.00 | 35,144 | D | A |
| 05 Jun, 2025 | Peter Hirth | Stock Option (Right to Buy) | A | 35,144 | $0.00 | 35,144 | D | A |
| 05 Jun, 2025 | Christian E Elling | Stock Option (Right to Buy) | A | 35,144 | $0.00 | 35,144 | D | A |
| 30 May, 2025 | Heidi Hunter | Common Stock | A | 15,000 | $1.39 | 15,000 | D | P |
| 02 Apr, 2025 | Amy Sullivan | Stock Option (Right to Buy) | A | 215,000 | $0.00 | 215,000 | D | A |
| 02 Apr, 2025 | Brian Burkavage | Stock Option (Right to Buy) | A | 65,000 | $0.00 | 65,000 | D | A |
| 02 Apr, 2025 | Qasim Iftikhar Ahmad | Stock Option (Right to Buy) | A | 215,000 | $0.00 | 215,000 | D | A |
| 02 Apr, 2025 | Mai-Britt Zocca | Stock Option (Right to Buy) | A | 580,000 | $0.00 | 580,000 | D | A |
| 23 Dec, 2024 | Qasim Iftikhar Ahmad | Common Stock | A | 31,350 | $0.85 | 31,350 | D | P |
| 23 Dec, 2024 | Mai-Britt Zocca | Common Stock | A | 12,500 | $0.81 | 49,891 | D | P |
| 23 Dec, 2024 | Amy Sullivan | Common Stock | A | 10,250 | $0.83 | 84,632 | D | P |
| 25 Jul, 2024 | Holdings A/S Novo | COMMON STOCK | D | 51,522 | $1.33 | 4,377,927 | D | S |
| 26 Jul, 2024 | Holdings A/S Novo | COMMON STOCK | D | 23,478 | $1.31 | 4,354,449 | D | S |
| 06 Jun, 2024 | Kathleen Sereda Glaub | Stock Option (Right to Buy) | A | 45,642 | $0.00 | 45,642 | D | A |
| 06 Jun, 2024 | Christian E Elling | Stock Option (Right to Buy) | A | 45,642 | $0.00 | 45,642 | D | A |
| 06 Jun, 2024 | Heidi Hunter | Stock Option (Right to Buy) | A | 45,642 | $0.00 | 45,642 | D | A |
| 06 Jun, 2024 | Peter Hirth | Stock Option (Right to Buy) | A | 45,642 | $0.00 | 45,642 | D | A |
| 06 Jun, 2024 | Helen Louise Collins | Stock Option (Right to Buy) | A | 45,642 | $0.00 | 45,642 | D | A |