# Onyx Bio funding: rounds and investors

> Onyx Bio has raised $8.0M across 1 round since 2026. Investors include Haystack. Every round with its source.

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

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

# Who invested in *Onyx Bio*

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.

Pharma

Raised 9 months ago

Funding summary Updated 26 Oct 2026

**$8.0M** raised across 1 round since 2026, from 1 source

- **Latest round:** Venture, $8.0M Feb 2026
- **Investors:** 1

See who backed them

## The rounds

- **Feb 2026** Venture **$8.0M** [Haystack](https://millionrounds.com/fund/haystack) Source recorded SEC filing: $8.0M sold, first sale Feb 2026

## Founders and team

From Onyx Bio's own website: 2 founders.

**Roger Chen** Co-Founder and Chief Executive Officer

**Amit Lakhani** Co-Founder and Chief Technology Officer

## Everyone who backed them

[Haystack](https://millionrounds.com/fund/haystack) VC firm **1** round

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

## Also claim to have backed them

This firm lists Onyx Bio 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.

[Refactor Capital](https://millionrounds.com/fund/refactor-capital) VC firm Per its own site

## Quick answers about Onyx Bio

### Who invested in Onyx Bio?

Onyx Bio's investors include Haystack.

### How much has Onyx Bio raised?

Onyx Bio has raised $8.0M across 1 round since 2026.

### When did Onyx Bio last raise?

Onyx Bio's most recent round was a Venture of $8.0M in Feb 2026.

### What was Onyx Bio's biggest round?

Its most recent round, $8.0M in Feb 2026, is also its largest on record.

### Who backed Onyx Bio first?

Onyx Bio's first round on record, in Feb 2026, was backed by Haystack.

### What stage is Onyx Bio at?

Onyx Bio's latest named round is a Venture, in Feb 2026.

### Where is Onyx Bio based?

Onyx Bio is based in the United States.

## Companies like Onyx Bio

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

[**Matchpoint Therapeutics** $220M · Oct 2026](https://millionrounds.com/company/matchpoint-therapeutics)[**Rx Bandz** Oct 2026](https://millionrounds.com/company/rx-bandz)[**Hera Biotech** $1.8M · Sept 2026](https://millionrounds.com/company/hera-biotech)[**GevRx Nutraceuticals** $300K · Sept 2026](https://millionrounds.com/company/gevrx-nutraceuticals)[**RegCell** $81M · Sept 2026](https://millionrounds.com/company/regcell)[**ClearSight Therapeutics** $307K · Sept 2026](https://millionrounds.com/company/clearsight-therapeutics)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app