# Twentyeight-Seven Therapeutics funding: rounds and investors

> Twentyeight-Seven Therapeutics has raised $15M across 1 round since 2019. Investors include Vertex Ventures, Sofinnova Partners and Longwood Fund.

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

[Series A startup](https://millionrounds.com/companies)

# Who invested in *Twentyeight-Seven Therapeutics*

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

**$15M** raised across 1 round since 2019, from 1 source

- **Latest round:** Series A, $15M May 2019
- **Investors:** 3

See who backed them

## The rounds

- **May 2019** Series A **$15M** [Vertex Ventures](https://millionrounds.com/fund/vertex-ventures) [Sofinnova Partners](https://millionrounds.com/fund/sofinnova-partners) [Longwood Fund](https://millionrounds.com/fund/longwood-fund) Source recorded

## Everyone who backed them

[Vertex Ventures](https://millionrounds.com/fund/vertex-ventures) VC firm **1** round

[Sofinnova Partners](https://millionrounds.com/fund/sofinnova-partners) VC firm **1** round

[Longwood Fund](https://millionrounds.com/fund/longwood-fund) VC firm **1** round

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

## Quick answers about Twentyeight-Seven Therapeutics

### Who invested in Twentyeight-Seven Therapeutics?

Twentyeight-Seven Therapeutics's investors include Vertex Ventures, Sofinnova Partners and Longwood Fund.

### How much has Twentyeight-Seven Therapeutics raised?

Twentyeight-Seven Therapeutics has raised $15M across 1 round since 2019.

### When did Twentyeight-Seven Therapeutics last raise?

Twentyeight-Seven Therapeutics's most recent round was a Series A of $15M in May 2019.

### What was Twentyeight-Seven Therapeutics's biggest round?

Its most recent round, $15M in May 2019, is also its largest on record.

### Who backed Twentyeight-Seven Therapeutics first?

Twentyeight-Seven Therapeutics's first round on record, in May 2019, was backed by Vertex Ventures, Sofinnova Partners and Longwood Fund.

### What stage is Twentyeight-Seven Therapeutics at?

Twentyeight-Seven Therapeutics's latest named round is a Series A, in May 2019.

## Companies like Twentyeight-Seven Therapeutics

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

[**Cloverleaf Bio** $33M · Sept 2026](https://millionrounds.com/company/cloverleaf-bio)[**Cheiron** $8.0M · Jul 2026](https://millionrounds.com/company/cheiron)[**Tavo Biotherapeutics** $17M · Jun 2026](https://millionrounds.com/company/tavo-biotherapeutics)[**Countable Labs** $26M · May 2026](https://millionrounds.com/company/countable-labs)[**Oricell Therapeutics** $180M · Apr 2026](https://millionrounds.com/company/oricell-therapeutics)[**Immunofoco** $29M · Mar 2026](https://millionrounds.com/company/immunofoco)

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