Comparable stake leader
Invest A/s Lundbeckfond
SEC ownership of IO Biotech, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001865494.
Disclosed value leader
Invest A/s Lundbeckfond
Comparable rows
4/23
Latest evidence
05 Jun 2025
- Public ticker
- IOBTQ
- Parsed ownership sources
-
3/4/5 and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Invest A/s Lundbeckfond
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
4 of 23
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Invest A/s Lundbeckfond
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
05 Jun 2025
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001865494
- Issuer location
- Copenhagen, Denmark
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of IO Biotech, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Invest A/s Lundbeckfond
Disclosed value leader
Invest A/s Lundbeckfond
Comparable rows
4/23
Latest evidence
05 Jun 2025
3/4/5
13D/G
Lead comparable stake: 27%
19 rows are not safely comparable across share classes.
13D/G row: Invest A/s Lundbeckfond
Showing 1-8 of 23 holder rows.
Quick read
Invest A/s Lundbeckfond leads the comparable SEC ownership view at 27%.
4 of 23 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Invest A/s Lundbeckfond's linked filing trail.
Comparable ownership
Top 4
Invest A/s Lundbeckfond
27%
Samsara BioCapital, L.P.
3.8%
Novo Holdings A/S
3.3%
HBM Healthcare Investments (Cayma...
3.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 23 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Invest A/s Lundbeckfond |
3/4/5
13D/G
Director, 10%+ Owner · Lundbeckfond Invest A/S
|
27%
from 13D/G
|
$14,438,960
21,851,920 shares
mixed-class rows
|
— | 09 Aug 2023 |
| Samsara BioCapital, L.P. |
13D/G
|
3.8%
|
$2,578,946
2,631,578 shares
|
$0 | 31 Dec 2024 |
| Novo Holdings A/S |
3/4/5
13D/G
10%+ Owner
|
3.3%
from 13D/G
|
$5,709,989
6,823,584 shares
mixed-class rows
|
— | 25 Jul 2024 |
| HBM Healthcare Investments (Cayman) Ltd. |
3/4/5
13D/G
10%+ Owner
|
3.3%
from 13D/G
|
$2,784,714
2,690,545 shares
|
— | 09 Nov 2021 |
| Vivo Capital IX, LLC |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$9,510,598
12,346,878 shares
mixed-class rows
|
— | 09 Aug 2023 |
| Kurma Partners |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$645,248
623,428 shares
|
— | 09 Aug 2023 |
| Claus A. Andersson |
3/4/5
Director
|
—
class O/S missing
|
$1,854,192
1,791,490 shares
|
— | 09 Nov 2021 |
| Vanessa Malier |
3/4/5
Director
|
—
class O/S missing
|
$445,544
430,477 shares
|
— | 09 Nov 2021 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 13 Sep 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 24 reporting-owner rows connected to IO Biotech, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
24
Largest Forms 3/4/5 holder
Invest A/s Lundbeckfond
Net 12M change
$0
Latest report
05 Jun 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Invest A/s Lundbeckfond | Director, 10%+ Owner | $14,438,960 | Mixed | 09 Aug 2023 | ||
| Vivo Capital IX, LLC | 10%+ Owner | $9,510,598 | Mixed | 09 Aug 2023 | ||
| Novo Holdings A/S | 10%+ Owner | $5,709,989 | Filing P/S | 25 Jul 2024 | ||
| HBM Healthcare Investments (Cayman) Ltd. | 10%+ Owner | $2,784,714 | Mixed | 09 Nov 2021 | ||
| Claus A. Andersson | Director | $1,854,192 | Mixed | 09 Nov 2021 | ||
| Kurma Partners | 10%+ Owner | $645,248 | Mixed | 09 Aug 2023 | ||
| Vanessa Malier | Director | $445,544 | Mixed | 09 Nov 2021 | ||
| Amy Sullivan | Chief Financial Officer | $70,041 | Filing P/S | 02 Apr 2025 | ||
| Mai-Britt Zocca | Chief Executive Officer, Director | $61,911 | Mixed | 02 Apr 2025 | ||
| Qasim Iftikhar Ahmad | Chief Medical Officer | $26,553 | Filing P/S | 02 Apr 2025 | ||
| Heidi Hunter | Director | $20,884 | Filing P/S | 05 Jun 2025 | ||
| Devin W. Smith | General Counsel | $13,720 | Filing P/S | 02 Apr 2025 | ||
| Priyanka Belawat | Director | Mixed | 04 Nov 2021 | |||
| Brian Burkavage | Chief Accounting Officer | Mixed | 02 Apr 2025 | |||
| David V Smith | Director | Mixed | 05 Jun 2025 | |||
| Jack Nielsen | Director | Mixed | 08 Jun 2023 | |||
| Kathleen Sereda Glaub | Director | Mixed | 05 Jun 2025 | |||
| Helen Louise Collins | Director | Mixed | 05 Jun 2025 | |||
| Christian E. Elling | Director | Mixed | 05 Jun 2025 | |||
| Muhammad Al-Hajj | Chief Scientific Officer | Mixed | 20 Mar 2023 |
Recent insider transactions for IO Biotech, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.