# Prolium funding: rounds and investors

> Prolium has raised $50M across 1 round since 2026. Investors include RTW Investments LLC. Every round with its source.

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

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

# Who invested in *Prolium*

One round we have observed, with the one investor 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 1 source

- **Latest round:** Series A, $50M Mar 2026
- **Investors:** 1

See who backed them

## The rounds

- **Mar 2026** Series A **$50M** [RTW Investments LLC](https://millionrounds.com/fund/rtw-investments-lp) Source recorded

## Everyone who backed them

[RTW Investments LLC](https://millionrounds.com/fund/rtw-investments-lp) Growth equity **1** round

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

## Quick answers about Prolium

### Who invested in Prolium?

Prolium's investors include RTW Investments LLC.

### How much has Prolium raised?

Prolium has raised $50M across 1 round since 2026.

### When did Prolium last raise?

Prolium's most recent round was a Series A of $50M in Mar 2026.

### What was Prolium's biggest round?

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

### Who backed Prolium first?

Prolium's first round on record, in Mar 2026, was backed by RTW Investments LLC.

### What stage is Prolium at?

Prolium's latest named round is a Series A, in Mar 2026.

### Where is Prolium based?

Prolium is based in the United States.

## Companies like Prolium

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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