# Primrose Bio funding: rounds and investors

> Primrose Bio has raised $17M across 2 rounds since 2024. Investors include National Science Foundation. Every round with its source.

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

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

# Who invested in *Primrose Bio*

2 rounds we have observed, with the one investor 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.

Biotech

Raised 2 months ago

Funding summary Updated 26 Oct 2026

**$17M** raised across 2 rounds since 2024, from 2 sources

**$15M** Venture **$2.0M** Venture

- **Latest round:** Venture, $2.0M Sept 2026
- **Biggest round:** $15M Venture · Jul 2024
- **Investors:** 1

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.

2025 2026

**$15M** Venture

**$2.0M** Venture

- **First round:** Venture, $15M
- **Biggest round:** $15M
- **Between rounds:** 2.2 years

## The rounds

- **Sept 2026** Venture **$2.0M** *1 returning* [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Source recorded
- **Jul 2024** Venture **$15M** *1 new* [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Source recorded SEC filing: $15M sold, first sale Jun 2024

## Founders and team

From Primrose Bio's own website: 21 on the team.

- **Drew Burch** Chief Executive Officer
- **Simon Latimer** Chief Financial Officer
- **Louis J. Cantolupo** VP, Business Development
- **Adam Chapman** Principal Scientist
- **Alec Tzianabos** Manager, Business Development
- **Barbara Frey** Associate Scientist
- **Bill Colby** Senior Director Operations
- **Blake Trial** Project Manager
- **Carl Posadas** Quality Manager
- **James Gale** Board Member
- **Jason Payne** Principal Scientist
- **Jennifer Wittbold** Associate Director, Product & BD
- **Laila Halim** Senior Research Associate
- **Lauren Hay** Board Member
- **Lindsey Jasch** Associate Scientist
- **Matt Reber** Board Member
- **Michael Bacica** Principal Scientist
- **Robert Lasala** Facilities Manager

And 3 more on the team.

Advisers *Deborah Day Barbara* *Khaled Yamout*

## Everyone who backed them

[National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Government **2** rounds

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

## Also claim to have backed them

These 2 firms list Primrose Bio 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.

[Signet Healthcare Partners](https://millionrounds.com/fund/signet-healthcare-partners) VC firm Per its own site

[Agent Capital](https://millionrounds.com/fund/agent-capital) VC firm Per its own site

## Quick answers about Primrose Bio

### Who invested in Primrose Bio?

Primrose Bio's investors include National Science Foundation.

### How much has Primrose Bio raised?

Primrose Bio has raised $17M across 2 rounds since 2024.

### When did Primrose Bio last raise?

Primrose Bio's most recent round was a Venture of $2.0M in Sept 2026.

### What was Primrose Bio's biggest round?

Primrose Bio's largest round on record is $15M (Venture), in Jul 2024.

### Who backed Primrose Bio first?

Primrose Bio's first round on record, in Jul 2024, was backed by National Science Foundation.

### What stage is Primrose Bio at?

Primrose Bio's latest named round is a Venture, in Sept 2026.

### Where is Primrose Bio based?

Primrose Bio is based in the United States.

## Companies like Primrose Bio

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

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)

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