# 2seventy bio funding: rounds and investors

> 2seventy bio has raised $125M across 1 round since 2023. Investors include Janus Henderson Investors, RTW Investments LLC and Bain Capital Life Sciences.

Source: https://millionrounds.com/company/2seventy-bio (Millionrounds; every figure on the page links to its filing or article)

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

# Who invested in *2seventy bio*

One round we have observed, with the 3 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

**$125M** raised across 1 round since 2023, from 1 source

- **Latest round:** Round, $125M Feb 2023
- **Investors:** 3

See who backed them

## The rounds

- **Feb 2023** Round **$125M** [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) [RTW Investments LLC](https://millionrounds.com/fund/rtw-investments-lp) [Bain Capital Life Sciences](https://millionrounds.com/fund/bain-capital-life-sciences) Source recorded

## Founders and team

From the SEC filings it signed: 4 on the team.

- **Nick Leschly** Executive Officer, Director i
- **Nicola Heffron** Executive Officer i
- **Philip D. Gregory** Executive Officer i
- **William D. Baird** Executive Officer i

On the board, as filed i *Daniel D. Lynch* *Denice R. Torres* *Marcela V. Maus* *Ramy R. Ibrahim* *Sarah JS Glickman* *William R. Sellers*

## Everyone who backed them

[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

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

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=2seventy-bio).

## Quick answers about 2seventy bio

### Who invested in 2seventy bio?

2seventy bio's investors include Janus Henderson Investors, RTW Investments LLC and Bain Capital Life Sciences.

### How much has 2seventy bio raised?

2seventy bio has raised $125M across 1 round since 2023.

### When did 2seventy bio last raise?

2seventy bio's most recent round was an Undisclosed round of $125M in Feb 2023.

### What was 2seventy bio's biggest round?

Its most recent round, $125M in Feb 2023, is also its largest on record.

### Who backed 2seventy bio first?

2seventy bio's first round on record, in Feb 2023, was backed by Janus Henderson Investors, RTW Investments LLC and Bain Capital Life Sciences.

### What stage is 2seventy bio at?

2seventy bio's latest named round is an Undisclosed round, in Feb 2023.

### Where is 2seventy bio based?

2seventy bio is based in the United States.

## Companies like 2seventy bio

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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