Who has invested in BillionToOne?

Y Combinator are named among the investors backing BillionToOne.

BillionToOne Funding: $300M Raised, Series D (2025)

BillionToOne funding overview

BillionToOne is a Biotech company based in Menlo Park, California. BillionToOne has raised $300M in total disclosed funding. That places its disclosed total in the $250M–$1B range. Its most recent disclosed round is a Series D announced in November 2025. The round record for BillionToOne runs through 2025; nothing later has been disclosed. Investors on record include Y Combinator.

BillionToOne at a glance

Total raised: $300M
Latest round: Series D
Latest round date: November 2025
Industry: Biotech
Headquarters: Menlo Park, California
Notable investors: Y Combinator

Frequently asked about BillionToOne funding

How much has BillionToOne raised?: BillionToOne has raised $300M in total disclosed funding across the rounds on record.
Who has invested in BillionToOne?: Y Combinator are named among the investors backing BillionToOne.
What was the latest BillionToOne funding round?: The most recent disclosed round is a Series D, announced in November 2025.
Where is BillionToOne based?: BillionToOne is based in Menlo Park, California.
What sector does BillionToOne operate in?: BillionToOne is tracked under Biotech from Menlo Park, California, with $300M in disclosed funding.
When did BillionToOne last raise?: The last disclosed BillionToOne round closed in November 2025 at Series D.

BillionToOne totals reflect disclosed capital only — undisclosed extensions and secondaries are excluded. Use the related Biotech companies in Menlo Park below to benchmark round size and investor mix.

BillionToOne Funding: $300M Raised, Series D (2025)

BillionToOne funding overview

BillionToOne at a glance

Frequently asked about BillionToOne funding

BillionToOne founders (1)

Companies related to BillionToOne (40)

Browse related funding lists (4)