# Mariana Oncology funding: rounds and investors

> Mariana Oncology has raised $175M across 1 round since 2023. Investors include Atlas Venture, RA Capital Management and Eli Lilly. Every round with its source.

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

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

# Who invested in *Mariana 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.

Biotech

Funding summary Updated 26 Oct 2026

**$175M** raised across 1 round since 2023, from 1 source

- **Latest round:** Series B, $175M Sept 2023
- **Investors:** 4

See who backed them

## The rounds

- **Sept 2023** Series B **$175M** [Atlas Venture](https://millionrounds.com/fund/atlas-venture) [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) [Forbion Capital Partners](https://millionrounds.com/fund/forbion-capital-partners) Source recorded

## Everyone who backed them

[Atlas Venture](https://millionrounds.com/fund/atlas-venture) VC firm **1** round

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

[Eli Lilly](https://millionrounds.com/fund/eli-lilly) Corporate VC **1** round

[Forbion Capital Partners](https://millionrounds.com/fund/forbion-capital-partners) Private equity **1** round

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

## Also claim to have backed them

This firm lists Mariana Oncology as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[Nextech Invest](https://millionrounds.com/fund/nextech-invest) Private equity Per its own site

## Quick answers about Mariana Oncology

### Who invested in Mariana Oncology?

Mariana Oncology's investors include Atlas Venture, RA Capital Management, Eli Lilly and Forbion Capital Partners.

### How much has Mariana Oncology raised?

Mariana Oncology has raised $175M across 1 round since 2023.

### When did Mariana Oncology last raise?

Mariana Oncology's most recent round was a Series B of $175M in Sept 2023.

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

Its most recent round, $175M in Sept 2023, is also its largest on record.

### Who backed Mariana Oncology first?

Mariana Oncology's first round on record, in Sept 2023, was backed by Atlas Venture, RA Capital Management and Eli Lilly and 1 others.

### What stage is Mariana Oncology at?

Mariana Oncology's latest named round is a Series B, in Sept 2023.

### Where is Mariana Oncology based?

Mariana Oncology is based in the United States.

## Companies like Mariana Oncology

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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