United States · 
Who invested in ACELYRIN?
ACELYRIN's investors include OrbiMed, Samsara BioCapital and RTW Investments LLC.
United States · Series C startup
Who invested in ACELYRIN
Funding summaryUpdated 26 Oct 2026
$300Mraised across 1 round since 2022, from 1 source
- Latest round
- Series C, $300MSept 2022
- Investors
- 3
The rounds
- Sept 2022
Everyone who backed them
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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.
Quick answers about ACELYRIN
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.
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