Denmark · 
Who invested in IO Biotech?
IO Biotech's investors include RA Capital Management, European Investment Bank, Vivo Capital and Samsara BioCapital.
Denmark · Funded startup
Who invested in IO Biotech
Funding summaryUpdated 26 Oct 2026
$6.6Mraised across 1 round since 2025, from 1 source
- Latest round
- Round, $6.6MSept 2025
- Investors
- 4
The rounds
- Sept 2025Round$6.6M
Source recorded
Founders and team
From IO Biotech's own website: 2 on the team.
- Amy SullivanChief Financial Officer
- Devin SmithGeneral Counsel
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 2 firms list IO Biotech as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about IO Biotech
How much has IO Biotech raised?
IO Biotech has raised $6.6M across 1 round since 2025.
When did IO Biotech last raise?
IO Biotech's most recent round was an Undisclosed round of $6.6M in Sept 2025.
What was IO Biotech's biggest round?
Its most recent round, $6.6M in Sept 2025, is also its largest on record.
Who backed IO Biotech first?
IO Biotech's first round on record, in Sept 2025, was backed by RA Capital Management, European Investment Bank and Vivo Capital and 1 others.
What stage is IO Biotech at?
IO Biotech's latest named round is an Undisclosed round, in Sept 2025.
Where is IO Biotech based?
IO Biotech is based in Denmark.
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In the same sector, and raised in the last eighteen months.
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