United States · 
Who invested in Ollin Biosciences?
Ollin Biosciences's investors include ARCH Venture Partners, Mubadala, RA Capital Management, TCG and TCG Crossover.
2026
$100MSeries A$330MSeries B
United States · Series B startup
Who invested in Ollin Biosciences
Funding summaryUpdated 26 Oct 2026
$430Mraised across 2 rounds since 2025, from 2 sources
$100MSeries A$330MSeries B
- Latest round
- Series B, $330MJun 2026
- Step-upi
- 3.3×
- Investors
- 5
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series A, $100M Sept 2025
- Biggest round
- $330M Series B · Jun 2026
- Between rounds
- 9 months from the last two
The rounds
- Jun 2026Series B$330M3 new2 returning
Source recordedSEC filing: $156M sold
- Sept 2025
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Ollin Biosciences
How much has Ollin Biosciences raised?
Ollin Biosciences has raised $430M across 2 rounds since 2025.
When did Ollin Biosciences last raise?
Ollin Biosciences's most recent round was a Series B of $330M in Jun 2026.
What was Ollin Biosciences's biggest round?
Its most recent round, $330M in Jun 2026, is also its largest on record.
Who backed Ollin Biosciences first?
Ollin Biosciences's first round on record, in Sept 2025, was backed by ARCH Venture Partners and Mubadala.
What stage is Ollin Biosciences at?
Ollin Biosciences's latest named round is a Series B, in Jun 2026.
Where is Ollin Biosciences based?
Ollin Biosciences is based in the United States.
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