# Rey funding: rounds and investors

> Rey has raised $10M across 1 round since 2021. Investors include Oxford Science Enterprises and Optum Ventures. Every round with its source.

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

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

# Who invested in *Rey*

One round we have observed, with the 2 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.

Healthcare

Funding summary Updated 26 Oct 2026

**$10M** raised across 1 round since 2021, from 1 source

- **Latest round:** Series A, $10M Jul 2021
- **Investors:** 2

See who backed them

## The rounds

- **Jul 2021** Series A **$10M** [Oxford Science Enterprises](https://millionrounds.com/fund/oxford-science-enterprises) [Optum Ventures](https://millionrounds.com/fund/optum-ventures) Source recorded

## Everyone who backed them

[Oxford Science Enterprises](https://millionrounds.com/fund/oxford-science-enterprises) VC firm **1** round

[Optum Ventures](https://millionrounds.com/fund/optum-ventures) VC firm **1** round

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

## Also claim to have backed them

This firm lists Rey as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[CyberAgent Capital, Inc.](https://millionrounds.com/fund/cyberagent-capital-inc) VC firm Per its own site

## Quick answers about Rey

### Who invested in Rey?

Rey's investors include Oxford Science Enterprises and Optum Ventures.

### How much has Rey raised?

Rey has raised $10M across 1 round since 2021.

### When did Rey last raise?

Rey's most recent round was a Series A of $10M in Jul 2021.

### What was Rey's biggest round?

Its most recent round, $10M in Jul 2021, is also its largest on record.

### Who backed Rey first?

Rey's first round on record, in Jul 2021, was backed by Oxford Science Enterprises and Optum Ventures.

### What stage is Rey at?

Rey's latest named round is a Series A, in Jul 2021.

### Where is Rey based?

Rey is based in the United States.

## Companies like Rey

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

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**AI** $18M · Oct 2026](https://millionrounds.com/company/ai)[**Baba** $40M · Oct 2026](https://millionrounds.com/company/baba)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)

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