# Aiolos Bio funding: rounds and investors

> Aiolos Bio has raised $245M across 1 round since 2023. Investors include Atlas Venture, RA Capital Management and Forbion Capital Partners.

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

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

# Who invested in *Aiolos Bio*

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.

Pharma

Funding summary Updated 26 Oct 2026

**$245M** raised across 1 round since 2023, from 1 source

- **Latest round:** Series A, $245M Oct 2023
- **Investors:** 4

See who backed them

## The rounds

- **Oct 2023** Series A **$245M** [Atlas Venture](https://millionrounds.com/fund/atlas-venture) [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [Forbion Capital Partners](https://millionrounds.com/fund/forbion-capital-partners) [Bain Capital Life Sciences](https://millionrounds.com/fund/bain-capital-life-sciences) Source recorded

## Everyone who backed them

[Atlas Venture](https://millionrounds.com/fund/atlas-venture) VC firm **1** round

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

[Forbion Capital Partners](https://millionrounds.com/fund/forbion-capital-partners) Private equity **1** round

[Bain Capital Life Sciences](https://millionrounds.com/fund/bain-capital-life-sciences) Private equity **1** round

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

## Quick answers about Aiolos Bio

### Who invested in Aiolos Bio?

Aiolos Bio's investors include Atlas Venture, RA Capital Management, Forbion Capital Partners and Bain Capital Life Sciences.

### How much has Aiolos Bio raised?

Aiolos Bio has raised $245M across 1 round since 2023.

### When did Aiolos Bio last raise?

Aiolos Bio's most recent round was a Series A of $245M in Oct 2023.

### What was Aiolos Bio's biggest round?

Its most recent round, $245M in Oct 2023, is also its largest on record.

### Who backed Aiolos Bio first?

Aiolos Bio's first round on record, in Oct 2023, was backed by Atlas Venture, RA Capital Management and Forbion Capital Partners and 1 others.

### What stage is Aiolos Bio at?

Aiolos Bio's latest named round is a Series A, in Oct 2023.

### Where is Aiolos Bio based?

Aiolos Bio is based in the United States.

## Companies like Aiolos Bio

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

[**Matchpoint Therapeutics** $220M · Oct 2026](https://millionrounds.com/company/matchpoint-therapeutics)[**Rx Bandz** Oct 2026](https://millionrounds.com/company/rx-bandz)[**Hera Biotech** $1.8M · Sept 2026](https://millionrounds.com/company/hera-biotech)[**GevRx Nutraceuticals** $300K · Sept 2026](https://millionrounds.com/company/gevrx-nutraceuticals)[**RegCell** $81M · Sept 2026](https://millionrounds.com/company/regcell)[**ClearSight Therapeutics** $307K · Sept 2026](https://millionrounds.com/company/clearsight-therapeutics)

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