# IO Biotech funding: rounds and investors

> IO Biotech has raised $6.6M across 1 round since 2025. Investors include RA Capital Management, European Investment Bank and Vivo Capital.

Source: https://millionrounds.com/company/io-biotech (Millionrounds; every figure on the page links to its filing or article)

Denmark · [Funded startup](https://millionrounds.com/companies)

# Who invested in *IO Biotech*

One round we have observed, with the 4 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Biotech

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Funding summary Updated 27 Oct 2026

**$6.6M** raised across 1 round since 2025, from 1 source

- **Latest round:** Round, $6.6M Sept 2025
- **Investors:** 4

See who backed them

## The rounds

- **Sept 2025** Round **$6.6M** [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [European Investment Bank](https://millionrounds.com/fund/european-investment-bank) [Vivo Capital](https://millionrounds.com/fund/vivo-capital) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) Source recorded

## Founders and team

From IO Biotech's own website: 2 on the team.

- **Amy Sullivan** Chief Financial Officer
- **Devin Smith** General Counsel

## Everyone who backed them

[RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Private equity **1** round

[European Investment Bank](https://millionrounds.com/fund/european-investment-bank) Government **1** round

[Vivo Capital](https://millionrounds.com/fund/vivo-capital) Private equity **1** round

[Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=io-biotech).

## 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.

[KurmaPartners](https://millionrounds.com/fund/kurmapartners) VC firm Per its own site

[EIR Ventures](https://millionrounds.com/fund/eir-ventures) VC firm Per its own site

## Quick answers about IO Biotech

### Who invested in IO Biotech?

IO Biotech's investors include RA Capital Management, European Investment Bank, Vivo Capital and Samsara BioCapital.

### 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.

## Companies like IO Biotech

In the same sector, and raised in the last eighteen months.

[**Zealand Pharma** $100M · Aug 2026](https://millionrounds.com/company/zealand-pharma)[**Curasight A/S** $3.1M · Jun 2026](https://millionrounds.com/company/curasight-a-s)[**Alcolase** $2.1M · May 2026](https://millionrounds.com/company/alcolase)[**ADCendo** $210M · Apr 2026](https://millionrounds.com/company/adcendo)[**ENZIDIA** $241K · Mar 2026](https://millionrounds.com/company/enzidia)[**Mycoverse** $2.8M · Mar 2026](https://millionrounds.com/company/mycoverse)

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