# Terrestrial Bio funding: rounds and investors

> Terrestrial Bio has raised $50M across 1 round since 2026. Investors include RA Capital Management, National Science Foundation and Engine Ventures.

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

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

# Who invested in *Terrestrial Bio*

One round we have observed, with the 5 investors named in it. 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 8 months ago

Funding summary Updated 26 Oct 2026

**$50M** raised across 1 round since 2026, from 2 sources

- **Latest round:** Series C, $50M Mar 2026
- **Led by:** RA Capital Management
- **Investors:** 5 (1 led)

See who backed them

## The rounds

- **Mar 2026** Series C **$50M** [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Lead [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [Engine Ventures](https://millionrounds.com/fund/engine-ventures) [GHIC](https://millionrounds.com/fund/ghic) [SiteGround](https://millionrounds.com/fund/siteground) Reported by Firms' own news pages and 1 other SEC filing: $57M sold, first sale Mar 2026

## Founders and team

From Terrestrial Bio's own website: 4 on the team.

- **Rachel Sha** Chief Executive Officer, Board Member
- **John Spiridigliozzi** VP of Product Development
- **Ray Knox** VP of Manufacturing
- **Weiner Tilsner** Head of Quality and Compliance

## Everyone who backed them

[RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Private equity **1** round, led 1

[National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Government **1** round

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

[GHIC](https://millionrounds.com/fund/ghic) Growth equity **1** round

[SiteGround](https://millionrounds.com/fund/siteground) Growth equity **1** round

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

## Quick answers about Terrestrial Bio

### Who invested in Terrestrial Bio?

Terrestrial Bio's investors include RA Capital Management, National Science Foundation, Engine Ventures, GHIC and SiteGround. RA Capital Management led its latest round.

### How much has Terrestrial Bio raised?

Terrestrial Bio has raised $50M across 1 round since 2026.

### When did Terrestrial Bio last raise?

Terrestrial Bio's most recent round was a Series C of $50M in Mar 2026, led by RA Capital Management.

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

Its most recent round, $50M in Mar 2026, is also its largest on record.

### Who backed Terrestrial Bio first?

Terrestrial Bio's first round on record, in Mar 2026, was backed by RA Capital Management, National Science Foundation and Engine Ventures and 2 others.

### What stage is Terrestrial Bio at?

Terrestrial Bio's latest named round is a Series C, in Mar 2026.

### Where is Terrestrial Bio based?

Terrestrial Bio is based in the United States.

### Who led Terrestrial Bio's rounds?

RA Capital Management led the Series C in 2026.

## Companies like Terrestrial 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)

## 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