United States · Series A startup

Who invested in Nabla Bio

2 rounds we have observed, with the 7 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

BiotechPharma

Y Combinator: S20

Funding summaryUpdated 26 Oct 2026

$37Mraised across 2 rounds since 2021, from 2 sources

$11MSeed$26MSeries A
Latest round
Series A, $26MMay 2024
Step-upi
2.4×
Investors
7
See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

202220232024
$11MSeed$26MSeries A
First round
Seed, $11M
Dec 2021
Biggest round
$26M
Series A · May 2024
Between rounds
2.4 years
from the last two

The rounds

  1. May 2024
    Series A$26M7 new

    Source recorded

  2. Dec 2021
    Seed$11M

    No investor was named in the report.

    Reported by Pillar VC

Founders and team

From Nabla Bio's own website: 3 founders, 2 on the team.

Frances AnastassacosCo-founder & President
Surge BiswasCo-founder & CEO
George ChurchCo-founder
  • Rose HarrisonChief Business Officer
  • Katie WarfelBoard of directors

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.

Seed2021Series A2024Y CombinatorNational Science FoundationKhosla VenturesRadical VenturesPillar VCZetta Venture PartnersFifty Years

Everyone who backed them

Y CombinatorAccelerator1round
National Science FoundationGovernment1round
Khosla VenturesVC firm1round
Radical VenturesVC firm1round
Pillar VCVC firm1round
Zetta Venture PartnersVC firm1round
Fifty YearsVC firm1round

Missing a round, or an investor who was in one? Tell us.

Quick answers about Nabla Bio

Who invested in Nabla Bio?

Nabla Bio's investors include Y Combinator, National Science Foundation, Khosla Ventures, Radical Ventures and Pillar VC, and 2 more on record.

How much has Nabla Bio raised?

Nabla Bio has raised $37M across 2 rounds since 2021.

When did Nabla Bio last raise?

Nabla Bio's most recent round was a Series A of $26M in May 2024.

What was Nabla Bio's biggest round?

Its most recent round, $26M in May 2024, is also its largest on record.

Who backed Nabla Bio first?

Nabla Bio's first round on record, in May 2024, was backed by Y Combinator, National Science Foundation and Khosla Ventures and 4 others.

What stage is Nabla Bio at?

Nabla Bio's latest named round is a Series A, in May 2024.

Where is Nabla Bio based?

Nabla Bio is based in the United States.

Companies like Nabla Bio

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

Star Therapeutics$325M · Oct 2026Prolific Machines$105M · Oct 2026Promaxo$106M · Oct 2026IMIO$19M · Oct 2026Rejuvenate Bio$13M · Oct 2026Clinical Ink$24M · Oct 2026

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