# Uncommon Therapeutics funding: rounds and investors

> Uncommon Therapeutics has raised $500K across 1 round since 2025. Investors include Y Combinator and Pioneer Fund. Every round with its source.

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

United States · [Pre-seed startup](https://millionrounds.com/companies)

# Who invested in *Uncommon Therapeutics*

One round we have observed, with the 2 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

Funding summary Updated 26 Oct 2026

**$500K** raised across 1 round since 2025, from 1 source

- **Latest round:** Pre-seed, $500K Mar 2025
- **Investors:** 2

See who backed them

## The rounds

- **Mar 2025** Pre-seed **$500K** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) Source recorded

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

[Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) Private equity **1** round

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

## Also claim to have backed them

These 2 firms list Uncommon Therapeutics 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.

[Ritual Capital Management Company, LLC](https://millionrounds.com/fund/ritual-capital-management-company-llc) Investor Per its own site

[Roar Ventures](https://millionrounds.com/fund/roar-ventures) VC firm Per its own site

## Quick answers about Uncommon Therapeutics

### Who invested in Uncommon Therapeutics?

Uncommon Therapeutics's investors include Y Combinator and Pioneer Fund.

### How much has Uncommon Therapeutics raised?

Uncommon Therapeutics has raised $500K across 1 round since 2025.

### When did Uncommon Therapeutics last raise?

Uncommon Therapeutics's most recent round was a Pre-seed of $500K in Mar 2025.

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

Its most recent round, $500K in Mar 2025, is also its largest on record.

### Who backed Uncommon Therapeutics first?

Uncommon Therapeutics's first round on record, in Mar 2025, was backed by Y Combinator and Pioneer Fund.

### What stage is Uncommon Therapeutics at?

Uncommon Therapeutics's latest named round is a Pre-seed, in Mar 2025.

### Where is Uncommon Therapeutics based?

Uncommon Therapeutics is based in the United States.

## Companies like Uncommon 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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