# ThirtyFiveBio funding: rounds and investors

> ThirtyFiveBio has raised $306K across 2 rounds since 2021. Investors include Innovate UK, Canaan and AbbVie. Every round with its source.

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

United Kingdom · [Venture startup](https://millionrounds.com/companies)

# Who invested in *ThirtyFiveBio*

2 rounds we have observed, with the 3 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Biotech

Funding summary Updated 26 Oct 2026

**$306K** raised across 2 rounds since 2021, from 2 sources

- **Latest round:** Venture Apr 2025
- **Biggest round:** $306K Round · Dec 2021
- **Investors:** 3

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2022 2023 2024 2025

**$306K** Round

**?** Venture

- **First round:** Round, $306K
- **Biggest round:** $306K
- **Between rounds:** 3.3 years

## The rounds

- **Apr 2025** Venture **Amount undisclosed** *3 new* [Innovate UK](https://millionrounds.com/fund/innovate-uk) [Canaan](https://millionrounds.com/fund/canaan-partners) [AbbVie](https://millionrounds.com/fund/abbvie) Source recorded
- **Dec 2021** Round **$306K** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet

## Funding filed with regulators

ThirtyFiveBio filed one raise, $306K in all. Filings say how much was sold and to how many investors; they never name the investors.

- Dec 2021 **$306K** UK share allotment

## Founders and team

From ThirtyFiveBio's own website: 4 founders, 4 on the team.

**Kirsty McCarthy** Co-founder & CEO of MTM

**Peter Joyce** Co-founder & CEO of Greywolf Therapeutics

**Stuart Hughes** Co-founder & CEO of Nuage Therapeutics

**Tom McCarthy** Executive Chair & co-founder, ThirtyFiveBio

- **James Westcott** CEO
- **Alastair Corbin** Head of Biology
- **Helen Carlile** Director of Operations
- **Victoria Perroud** Project Manager

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Round** 2021 **Venture** 2025 [Innovate UK](https://millionrounds.com/fund/innovate-uk) [Canaan](https://millionrounds.com/fund/canaan-partners) [AbbVie](https://millionrounds.com/fund/abbvie)

## Everyone who backed them

[Innovate UK](https://millionrounds.com/fund/innovate-uk) VC firm **1** round

[Canaan](https://millionrounds.com/fund/canaan-partners) VC firm **1** round

[AbbVie](https://millionrounds.com/fund/abbvie) Corporate VC **1** round

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

## Quick answers about ThirtyFiveBio

### Who invested in ThirtyFiveBio?

ThirtyFiveBio's investors include Innovate UK, Canaan and AbbVie.

### How much has ThirtyFiveBio raised?

ThirtyFiveBio has raised $306K across 2 rounds since 2021. One round did not disclose an amount, so the total is a floor.

### When did ThirtyFiveBio last raise?

ThirtyFiveBio's most recent round was a Venture in Apr 2025.

### What was ThirtyFiveBio's biggest round?

ThirtyFiveBio's largest round on record is $306K, in Dec 2021.

### Who backed ThirtyFiveBio first?

ThirtyFiveBio's first round on record, in Apr 2025, was backed by Innovate UK, Canaan and AbbVie.

### What stage is ThirtyFiveBio at?

ThirtyFiveBio's latest named round is a Venture, in Apr 2025.

### Where is ThirtyFiveBio based?

ThirtyFiveBio is based in the United Kingdom.

## Companies like ThirtyFiveBio

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

[**HydRegen** $12M · Oct 2026](https://millionrounds.com/company/hydregen)[**OMass Therapeutics** $442M · Oct 2026](https://millionrounds.com/company/omass-therapeutics)[**CMR Surgical** $1.1B · Oct 2026](https://millionrounds.com/company/cmr-surgical)[**Living Optics** $61M · Oct 2026](https://millionrounds.com/company/living-optics)[**Bactobio** $18M · Oct 2026](https://millionrounds.com/company/bactobio)[**RHYTHM AI** $23M · Sept 2026](https://millionrounds.com/company/rhythm-ai)

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