United States · 
Who invested in Turnstone Biologics?
Turnstone Biologics's investors include OrbiMed and Versant Ventures.
201620172018201920202021
$11MSeries A$41MSeries B$80MSeries DUnited States · Series D startup
Who invested in Turnstone Biologics
Funding summaryUpdated 26 Oct 2026
$133Mraised across 3 rounds since 2015, from 3 sources
$11MSeries A$41MSeries B$80MSeries D
- Latest round
- Series D, $80MJul 2021
- Step-upi
- 1.9×
- Investors
- 2
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, $11M Oct 2015
- Biggest round
- $80M Series D · Jul 2021
- Usual gap between rounds
- 4.7 years the median of 2
The rounds
- Jul 2021Series D$80M2 returning
Source recordedSEC filing: $80M sold, first sale Jun 2021
- Nov 2016
- Oct 2015
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.
Also claim to have backed them
This firm lists Turnstone Biologics 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 Turnstone Biologics
How much has Turnstone Biologics raised?
Turnstone Biologics has raised $133M across 3 rounds since 2015.
When did Turnstone Biologics last raise?
Turnstone Biologics's most recent round was a Series D of $80M in Jul 2021.
What was Turnstone Biologics's biggest round?
Its most recent round, $80M in Jul 2021, is also its largest on record.
Who backed Turnstone Biologics first?
Turnstone Biologics's first round on record, in Oct 2015, was backed by Versant Ventures.
What stage is Turnstone Biologics at?
Turnstone Biologics's latest named round is a Series D, in Jul 2021.
Where is Turnstone Biologics based?
Turnstone Biologics is based in the United States.
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