# Crossbow Therapeutics funding: rounds and investors

> Crossbow Therapeutics has raised $107M across 2 rounds since 2025. Investors include Polaris Partners and Eli Lilly. Every round with its source.

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

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

# Who invested in *Crossbow Therapeutics*

2 rounds we have observed, with the 2 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.

Biotech

Raised 8 months ago

Funding summary Updated 26 Oct 2026

**$107M** raised across 2 rounds since 2025, from 2 sources

**$30M** Venture **$77M** Series B

- **Latest round:** Series B, $77M Mar 2026
- **Step-up i:** 2.5×
- **Investors:** 2

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.

2026

**$30M** Venture

**$77M** Series B

- **First round:** Venture, $30M
- **Biggest round:** $77M
- **Between rounds:** 6 months

## The rounds

- **Mar 2026** Series B **$77M** *2 returning* [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) Source recorded
- **Sept 2025** Venture **$30M** *2 new* [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) Source recorded SEC filing: $30M sold, first sale Sept 2025

## 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.

**Venture** 2025 **Series B** 2026 [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Eli Lilly](https://millionrounds.com/fund/eli-lilly)

## Everyone who backed them

[Polaris Partners](https://millionrounds.com/fund/polaris-partners) VC firm **2** rounds

[Eli Lilly](https://millionrounds.com/fund/eli-lilly) Corporate VC **2** rounds

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

## Quick answers about Crossbow Therapeutics

### Who invested in Crossbow Therapeutics?

Crossbow Therapeutics's investors include Polaris Partners and Eli Lilly.

### How much has Crossbow Therapeutics raised?

Crossbow Therapeutics has raised $107M across 2 rounds since 2025.

### When did Crossbow Therapeutics last raise?

Crossbow Therapeutics's most recent round was a Series B of $77M in Mar 2026.

### What was Crossbow Therapeutics's biggest round?

Its most recent round, $77M in Mar 2026, is also its largest on record.

### Who backed Crossbow Therapeutics first?

Crossbow Therapeutics's first round on record, in Sept 2025, was backed by Polaris Partners and Eli Lilly.

### What stage is Crossbow Therapeutics at?

Crossbow Therapeutics's latest named round is a Series B, in Mar 2026.

### Where is Crossbow Therapeutics based?

Crossbow Therapeutics is based in the United States.

## Companies like Crossbow Therapeutics

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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