# DELFI Diagnostics funding: rounds and investors

> DELFI Diagnostics has raised $259M across 2 rounds since 2022. Investors include Menlo Ventures, OrbiMed and Eli Lilly. Every round with its source.

Source: https://millionrounds.com/company/delfi-diagnostics (Millionrounds; every figure on the page links to its filing or article)

United States · [Series B startup](https://millionrounds.com/companies)

# Who invested in *DELFI Diagnostics*

2 rounds we have observed, with the 4 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.

AI

Raised 11 months ago

Funding summary Updated 26 Oct 2026

**$259M** raised across 2 rounds since 2022, from 2 sources

**$225M** Series B **$34M** Round

- **Latest round:** Round, $34M Dec 2025
- **Biggest round:** $225M Series B · Jul 2022
- **Investors:** 4

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.

2023 2024 2025

**$225M** Series B

**$34M** Round

- **First round:** Series B, $225M
- **Biggest round:** $225M
- **Between rounds:** 3.4 years

## The rounds

- **Dec 2025** Round **$34M** No investor was named in the report. Filed with the SEC (Form D); no report of this raise yet SEC filing: $34M sold, first sale Dec 2025
- **Jul 2022** Series B **$225M** *4 new* [Menlo Ventures](https://millionrounds.com/fund/menlo-ventures) [OrbiMed](https://millionrounds.com/fund/orbimed) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) Source recorded SEC filing: $225M sold, first sale Jun 2022

## Founders and team

From DELFI Diagnostics's own website: 4 on the team.

- **Susan Tousi** Chief Executive Officer
- **Nidhi Narang** Vice President, Software and Data Engineering
- **Ally Dashner** Chief People Officer
- **Cindy Soriano** Chief Financial Officer

Advisers *Charles Newton*

## 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 B** 2022 **Round** 2025 [Menlo Ventures](https://millionrounds.com/fund/menlo-ventures) [OrbiMed](https://millionrounds.com/fund/orbimed) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital)

## Everyone who backed them

[Menlo Ventures](https://millionrounds.com/fund/menlo-ventures) VC firm **1** round

[OrbiMed](https://millionrounds.com/fund/orbimed) Private equity **1** round

[Eli Lilly](https://millionrounds.com/fund/eli-lilly) Corporate VC **1** round

[Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=delfi-diagnostics).

## Also claim to have backed them

These 3 firms list DELFI Diagnostics 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.

[Windham Capital Partners](https://millionrounds.com/fund/windham-capital-partners) Growth equity Per its own site

[Open Field Capital](https://millionrounds.com/fund/open-field-capital) VC firm Per its own site

[AV8](https://millionrounds.com/fund/av8-ventures) VC firm Per its own site

## Quick answers about DELFI Diagnostics

### Who invested in DELFI Diagnostics?

DELFI Diagnostics's investors include Menlo Ventures, OrbiMed, Eli Lilly and Samsara BioCapital.

### How much has DELFI Diagnostics raised?

DELFI Diagnostics has raised $259M across 2 rounds since 2022.

### When did DELFI Diagnostics last raise?

DELFI Diagnostics's most recent round, $34M, was in Dec 2025.

### What was DELFI Diagnostics's biggest round?

DELFI Diagnostics's largest round on record is $225M (Series B), in Jul 2022.

### Who backed DELFI Diagnostics first?

DELFI Diagnostics's first round on record, in Jul 2022, was backed by Menlo Ventures, OrbiMed and Eli Lilly and 1 others.

### What stage is DELFI Diagnostics at?

DELFI Diagnostics's latest named round is a Series B, in Jul 2022.

### Where is DELFI Diagnostics based?

DELFI Diagnostics is based in the United States.

## Companies like DELFI Diagnostics

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

[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Pika** $216M · Oct 2026](https://millionrounds.com/company/pika)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app