# ACELYRIN funding: rounds and investors

> ACELYRIN has raised $300M across 1 round since 2022. Investors include OrbiMed, Samsara BioCapital and RTW Investments LLC. Every round with its source.

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

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

# Who invested in *ACELYRIN*

One round we have observed, with the 3 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

**$300M** raised across 1 round since 2022, from 1 source

- **Latest round:** Series C, $300M Sept 2022
- **Investors:** 3

See who backed them

## The rounds

- **Sept 2022** Series C **$300M** [OrbiMed](https://millionrounds.com/fund/orbimed) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) [RTW Investments LLC](https://millionrounds.com/fund/rtw-investments-lp) Source recorded

## Everyone who backed them

[OrbiMed](https://millionrounds.com/fund/orbimed) Private equity **1** round

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

[RTW Investments LLC](https://millionrounds.com/fund/rtw-investments-lp) Growth equity **1** round

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

## Also claim to have backed them

This firm lists ACELYRIN 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.

[Decheng Capital](https://millionrounds.com/fund/decheng-capital) VC firm Per its own site

## Quick answers about ACELYRIN

### Who invested in ACELYRIN?

ACELYRIN's investors include OrbiMed, Samsara BioCapital and RTW Investments LLC.

### How much has ACELYRIN raised?

ACELYRIN has raised $300M across 1 round since 2022.

### When did ACELYRIN last raise?

ACELYRIN's most recent round was a Series C of $300M in Sept 2022.

### What was ACELYRIN's biggest round?

Its most recent round, $300M in Sept 2022, is also its largest on record.

### Who backed ACELYRIN first?

ACELYRIN's first round on record, in Sept 2022, was backed by OrbiMed, Samsara BioCapital and RTW Investments LLC.

### What stage is ACELYRIN at?

ACELYRIN's latest named round is a Series C, in Sept 2022.

### Where is ACELYRIN based?

ACELYRIN is based in the United States.

## Companies like ACELYRIN

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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