# Oak Hill Bio funding: rounds and investors

> Oak Hill Bio has raised $40M across 3 rounds since 2022. Investors include Janus Henderson Investors. Every round with its source.

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

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

# Who invested in *Oak Hill Bio*

3 rounds we have observed, with the one investor 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

Raised 5 months ago

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Funding summary Updated 27 Oct 2026

**$40M** raised across 3 rounds since 2022, from 3 sources

**$1.3M** Series B **$6.4M** Series B **$33M** Series A

- **Latest round:** Series A, $33M Jun 2026
- **Step-up i:** 5.1×
- **Investors:** 1

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 2026

**$1.3M** Series B

**$6.4M** Series B

**$33M** Series A

- **First round:** Series B, $1.3M
- **Biggest round:** $33M
- **Usual gap between rounds:** 3.8 years

## The rounds

- **Jun 2026** Series A **$33M** *1 new* [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) Source recorded
- **Nov 2025** Series B **$6.4M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **Jan 2022** Series B **$1.3M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet

## Funding filed with regulators

Oak Hill Bio filed 3 raises, $7.7M in all. Filings say how much was sold and to how many investors; they never name the investors.

- Nov 2025 **$6.4M** UK share allotment
- Jan 2022 **$264K** UK share allotment
- Jan 2022 **$995K** UK share allotment

## Everyone who backed them

[Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) Private equity **1** round

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

## Quick answers about Oak Hill Bio

### Who invested in Oak Hill Bio?

Oak Hill Bio's investors include Janus Henderson Investors.

### How much has Oak Hill Bio raised?

Oak Hill Bio has raised $40M across 3 rounds since 2022.

### When did Oak Hill Bio last raise?

Oak Hill Bio's most recent round was a Series A of $33M in Jun 2026.

### What was Oak Hill Bio's biggest round?

Its most recent round, $33M in Jun 2026, is also its largest on record.

### Who backed Oak Hill Bio first?

Oak Hill Bio's first round on record, in Jun 2026, was backed by Janus Henderson Investors.

### What stage is Oak Hill Bio at?

Oak Hill Bio's latest named round is a Series A, in Jun 2026.

### Where is Oak Hill Bio based?

Oak Hill Bio is based in the United Kingdom.

## Companies like Oak Hill Bio

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)[**Aptadir Therapeutics** $47M · Sept 2026](https://millionrounds.com/company/aptadir-therapeutics)

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