# Kailera Therapeutics funding: rounds and investors

> Kailera Therapeutics has raised $600M across 1 round since 2025. Investors include Bain Capital Private Equity, Atlas Venture and Janus Henderson Investors.

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

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

# Who invested in *Kailera Therapeutics*

One round we have observed, with the 10 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 Healthcare

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Funding summary Updated 5 Nov 2026

**$600M** raised across 1 round since 2025, from 3 sources

- **Latest round:** Series B, $600M Oct 2025
- **Led by:** Bain Capital Private Equity
- **Investors:** 10 (1 led)

See who backed them

## The rounds

- **Oct 2025** Series B **$600M** [Bain Capital Private Equity](https://millionrounds.com/fund/bain-capital-private-equity) Lead [Atlas Venture](https://millionrounds.com/fund/atlas-venture) [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) [RTW Investments LLC](https://millionrounds.com/fund/rtw-investments-lp) [Adage Capital Management](https://millionrounds.com/fund/adage-capital-management) [CPP Investments](https://millionrounds.com/fund/cpp-investments) [Bain Capital](https://millionrounds.com/fund/bain-capital) [Bain Capital Life Sciences](https://millionrounds.com/fund/bain-capital-life-sciences) [Qatar Ban](https://millionrounds.com/fund/qatar-ban) [Royalty Pharma](https://millionrounds.com/fund/royalty-pharma) Reported by Crunchbase News and 2 others

## Founders and team

From Kailera Therapeutics's own website: 8 on the team.

- **Ron Renaud** President & Chief Executive Officer
- **Doug Pagán** Chief Financial Officer
- **Jamie Coleman** Chief Commercial Officer
- **Kathleen Tregoning** Chief Corporate Affairs Officer
- **Nur Nicholson** Chief Technology Officer
- **Paul Burgess** Chief Operating Officer & Chief Business Officer
- **Paula Cloghessy** Chief People Officer
- **Scott Akamine** Chief Legal Officer

## Everyone who backed them

[Bain Capital Private Equity](https://millionrounds.com/fund/bain-capital-private-equity) Private equity **1** round, led 1

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

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

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

[Adage Capital Management](https://millionrounds.com/fund/adage-capital-management) Asset manager **1** round

[CPP Investments](https://millionrounds.com/fund/cpp-investments) Growth equity **1** round

[Bain Capital](https://millionrounds.com/fund/bain-capital) Private equity **1** round

[Bain Capital Life Sciences](https://millionrounds.com/fund/bain-capital-life-sciences) Private equity **1** round

[Qatar Ban](https://millionrounds.com/fund/qatar-ban) Growth equity **1** round

[Royalty Pharma](https://millionrounds.com/fund/royalty-pharma) Growth equity **1** round

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

## Quick answers about Kailera Therapeutics

### Who invested in Kailera Therapeutics?

Kailera Therapeutics's investors include Bain Capital Private Equity, Atlas Venture, Janus Henderson Investors, RTW Investments LLC and Adage Capital Management, and 5 more on record. Bain Capital Private Equity led its latest round.

### How much has Kailera Therapeutics raised?

Kailera Therapeutics has raised $600M across 1 round since 2025.

### When did Kailera Therapeutics last raise?

Kailera Therapeutics's most recent round was a Series B of $600M in Oct 2025, led by Bain Capital Private Equity.

### What was Kailera Therapeutics's biggest round?

Its most recent round, $600M in Oct 2025, is also its largest on record.

### Who backed Kailera Therapeutics first?

Kailera Therapeutics's first round on record, in Oct 2025, was backed by Bain Capital Private Equity, Atlas Venture and Janus Henderson Investors and 7 others.

### What stage is Kailera Therapeutics at?

Kailera Therapeutics's latest named round is a Series B, in Oct 2025.

### Where is Kailera Therapeutics based?

Kailera Therapeutics is based in the United States.

### Who led Kailera Therapeutics's rounds?

Bain Capital Private Equity led the Series B in 2025.

## Companies like Kailera Therapeutics

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

[**Omni** $244M · Nov 2026](https://millionrounds.com/company/omni)[**GPN Vaccines** $10B · Nov 2026](https://millionrounds.com/company/gpn-vaccines)[**General Medicine** $152M · Nov 2026](https://millionrounds.com/company/general-medicine)[**Midstream Health** $27M · Oct 2026](https://millionrounds.com/company/midstream-health)[**SpendRule** $6.0M · Oct 2026](https://millionrounds.com/company/spendrule)[**Urologic Design** $1.2M · Oct 2026](https://millionrounds.com/company/urologic-design)

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