United States · Funded startup

Who invested in BillionToOne

4 rounds we have observed, with the 16 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.

BiotechHealthcareMedical Devices

Valuation: $1.0B, Oct 2024Y Combinator: S17

Funding summaryUpdated 26 Oct 2026

$280Mraised across 4 rounds since 2019, from 4 sources

$15MSeries A$125MSeries C$140MDebt
Latest round
Debt, $140MSept 2024
Led by
Oberland Capital
Investors
16 (4 led)
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.

201920202021202220232024
$15MSeries A$125MSeries C?Venture$140MDebt
First round
Series A, $15M
Mar 2019
Biggest round
$140M
Debt · Sept 2024
Usual gap between rounds
2.2 years
the median of 3

The rounds

  1. Sept 2024
    Debt$140M1 new

    Reported by Firms' own news pages

  2. Jun 2024
    VentureAmount undisclosed1 new4 returning

    Source recorded

  3. Mar 2022
    Series C$125M7 new3 returning

    Reported by Firms' own news pages

  4. Mar 2019
    Series A$15M7 new

    Reported by Prnewswire

Founders and team

From BillionToOne's own website: 20 on the team.

  • Jean HaydenVP of Business Operations, Chief of Staff CEO
  • John ListerChief Administrative Officer
  • Carrie McGeheeVP of Market Access
  • Jaclyn EngVP of Marketing
  • Lynn FenicchiaVP of Sales
  • Brandon ResendezArea Director, Prenatal - West
  • Brittany WilliamsArea Director, Prenatal - East
  • Clara Ng-CummingsSenior Principal Communication Strategist
  • Elliott MarguliesDirector of Bioinformatics
  • Jonathan StumpfDirector of Market Access
  • Julia WynnDirector of Clinical Research
  • Karel HurkaSenior Director of Supply Chain
  • Kitty LiDirector of Lab Operations
  • Michele PhelpsSenior Director of Financial Planning & Analysis
  • Raisa ChoudhuriDirector of Commercial Strategy & Operations
  • Rob ThompsonDirector of Inside Sales
  • Ronny ElorDirector of Quality Assurance
  • Shara Venezia-WalersteinAssociate General Counsel

And 2 more on the team.

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.

Series A2019Series C2022Venture2024Debt2024Hummingbird VenturesLLNeotribe VenturesLY CombinatorNorwest Venture PartnersHOF CapitalCivilization VenturesAdams Street PartnersLOberland CapitalL500 GlobalFifty Years

Everyone who backed them

Hummingbird VenturesVC firm3rounds, led 2
Neotribe VenturesVC firm2rounds, led 1
Y CombinatorAccelerator2rounds
Norwest Venture PartnersVC firm2rounds
HOF CapitalVC firm2rounds
Civilization VenturesVC firm2rounds
Adams Street PartnersVC firm1round, led 1
Oberland CapitalPrivate credit1round, led 1
500 GlobalAngel1round
Fifty YearsVC firm1round
Baillie GiffordAsset manager1round
Time BioVenturesVC firm1round
Libertus CapitalVC firm1round
Pacific 8 VenturesVC firm1round
Fifty Years VCGrowth equity1round
500 Startups Istanbulno record of our own yet1round

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

Also claim to have backed them

These 12 firms list BillionToOne as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

UpHonest CapitalVC firmPer its own site
Toba CapitalVC firmPer its own site
Asymmetry VenturesVC firmPer its own site
Big Bang VenturesVC firmPer its own site
Start CapitalAngel networkPer its own site
Lombardstreet VenturesVC firmPer its own site
Audrey CapitalVC firmPer its own site
Fark LabsAcceleratorPer its own site
Inventus LawVC firmPer its own site
NEXYRVC firmPer its own site
Samsarik CapitalVC firmPer its own site
abenteuer.venturesAngel networkPer its own site

Quick answers about BillionToOne

Who invested in BillionToOne?

BillionToOne's investors include Hummingbird Ventures, Neotribe Ventures, Y Combinator, Norwest Venture Partners and HOF Capital, and 11 more on record. Oberland Capital led its latest round.

How much has BillionToOne raised?

BillionToOne has raised $280M across 4 rounds since 2019. One round did not disclose an amount, so the total is a floor.

When did BillionToOne last raise?

BillionToOne's most recent round was a Debt of $140M in Sept 2024, led by Oberland Capital.

What was BillionToOne's biggest round?

Its most recent round, $140M in Sept 2024, is also its largest on record.

Who backed BillionToOne first?

BillionToOne's first round on record, in Mar 2019, was backed by Hummingbird Ventures, Neotribe Ventures and Y Combinator and 4 others.

What stage is BillionToOne at?

BillionToOne's latest named round is a Debt, in Sept 2024.

Where is BillionToOne based?

BillionToOne is based in the United States.

Who led BillionToOne's rounds?

Hummingbird Ventures led the Series A in 2019; Adams Street Partners led the Series C in 2022; Oberland Capital led the Debt in 2024.

Companies like BillionToOne

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

Star Therapeutics$325M · Oct 2026Prolific Machines$105M · Oct 2026Promaxo$106M · Oct 2026AI$18M · Oct 2026IMIO$19M · Oct 2026Baba$40M · Oct 2026

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