# Arrowhead Pharmaceuticals funding: rounds and investors

> Arrowhead Pharmaceuticals has raised $500M across 1 round since 2024. Investors include Sixth Street. Every round with its source.

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

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

# Who invested in *Arrowhead Pharmaceuticals*

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 Pharma

Funding summary Updated 26 Oct 2026

**$500M** raised across 1 round since 2024, from 1 source

- **Latest round:** Debt, $500M Aug 2024
- **Led by:** Sixth Street
- **Investors:** 1 (1 led)

See who backed them

## The rounds

- **Aug 2024** Debt **$500M** [Sixth Street](https://millionrounds.com/fund/sixth-street) Lead Reported by Firms' own news pages

## Everyone who backed them

[Sixth Street](https://millionrounds.com/fund/sixth-street) Private equity **1** round, led 1

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

## Quick answers about Arrowhead Pharmaceuticals

### Who invested in Arrowhead Pharmaceuticals?

Arrowhead Pharmaceuticals's investors include Sixth Street. Sixth Street led its latest round.

### How much has Arrowhead Pharmaceuticals raised?

Arrowhead Pharmaceuticals has raised $500M across 1 round since 2024.

### When did Arrowhead Pharmaceuticals last raise?

Arrowhead Pharmaceuticals's most recent round was a Debt of $500M in Aug 2024, led by Sixth Street.

### What was Arrowhead Pharmaceuticals's biggest round?

Its most recent round, $500M in Aug 2024, is also its largest on record.

### Who backed Arrowhead Pharmaceuticals first?

Arrowhead Pharmaceuticals's first round on record, in Aug 2024, was backed by Sixth Street.

### What stage is Arrowhead Pharmaceuticals at?

Arrowhead Pharmaceuticals's latest named round is a Debt, in Aug 2024.

### Where is Arrowhead Pharmaceuticals based?

Arrowhead Pharmaceuticals is based in the United States.

### Who led Arrowhead Pharmaceuticals's rounds?

Sixth Street led the Debt in 2024.

## Companies like Arrowhead Pharmaceuticals

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

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)

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