# Rain Oncology funding: rounds and investors

> Rain Oncology has raised $63M across 1 round since 2020. Investors include Perceptive Advisors, Janus Henderson Investors and Cormorant Asset Management.

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

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

# Who invested in *Rain Oncology*

One round we have observed, with the 4 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.

Pharma

Funding summary Updated 26 Oct 2026

**$63M** raised across 1 round since 2020, from 1 source

- **Latest round:** Series B, $63M Sept 2020
- **Investors:** 4

See who backed them

## The rounds

- **Sept 2020** Series B **$63M** [Perceptive Advisors](https://millionrounds.com/fund/perceptive-advisors) [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) [Cormorant Asset Management](https://millionrounds.com/fund/cormorant-asset-management) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) Source recorded

## Everyone who backed them

[Perceptive Advisors](https://millionrounds.com/fund/perceptive-advisors) Asset manager **1** round

[Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) Private equity **1** round

[Cormorant Asset Management](https://millionrounds.com/fund/cormorant-asset-management) Private equity **1** round

[Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) VC firm **1** round

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

## Quick answers about Rain Oncology

### Who invested in Rain Oncology?

Rain Oncology's investors include Perceptive Advisors, Janus Henderson Investors, Cormorant Asset Management and Samsara BioCapital.

### How much has Rain Oncology raised?

Rain Oncology has raised $63M across 1 round since 2020.

### When did Rain Oncology last raise?

Rain Oncology's most recent round was a Series B of $63M in Sept 2020.

### What was Rain Oncology's biggest round?

Its most recent round, $63M in Sept 2020, is also its largest on record.

### Who backed Rain Oncology first?

Rain Oncology's first round on record, in Sept 2020, was backed by Perceptive Advisors, Janus Henderson Investors and Cormorant Asset Management and 1 others.

### What stage is Rain Oncology at?

Rain Oncology's latest named round is a Series B, in Sept 2020.

## Companies like Rain Oncology

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

[**Cheiron** $8.0M · Jul 2026](https://millionrounds.com/company/cheiron)[**Celloid** $6.1M · Mar 2026](https://millionrounds.com/company/celloid)[**CSR Biotech** Mar 2026](https://millionrounds.com/company/csr-biotech)[**Validfor** $1.2M · Feb 2026](https://millionrounds.com/company/validfor)[**Huixin Bio** $14M · Feb 2026](https://millionrounds.com/company/huixin-bio)[**Alioth** $14M · Jan 2026](https://millionrounds.com/company/alioth)

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