# resTORbio funding: rounds and investors

> resTORbio has raised $90M across 2 rounds since 2017. Investors include OrbiMed, Fidelity and Quan Funds. Every round with its source.

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

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

# Who invested in *resTORbio*

2 rounds we have observed, with the 6 investors named in them. 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 Pharma

Funding summary Updated 26 Oct 2026

**$90M** raised across 2 rounds since 2017, from 2 sources

**$40M** Series B **$50M** Round

- **Latest round:** Round, $50M Mar 2019
- **Step-up i:** 1.3×
- **Investors:** 6

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2018 2019

**$40M** Series B

**$50M** Round

- **First round:** Series B, $40M
- **Biggest round:** $50M
- **Between rounds:** 15 months

## The rounds

- **Mar 2019** Round **$50M** *2 new* [OrbiMed](https://millionrounds.com/fund/orbimed) [Fidelity](https://millionrounds.com/fund/fidelity) Source recorded
- **Nov 2017** Series B **$40M** *4 new* [Quan Funds](https://millionrounds.com/fund/quan-funds) Nest Bio OrbiMed/ Fidelity Rock Springs Reported by FinSMEs

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Series B** 2017 **Round** 2019 [OrbiMed](https://millionrounds.com/fund/orbimed) [Fidelity](https://millionrounds.com/fund/fidelity) [Quan Funds](https://millionrounds.com/fund/quan-funds) Nest Bio OrbiMed/ Fidelity Rock Springs

## Everyone who backed them

[OrbiMed](https://millionrounds.com/fund/orbimed) Private equity **1** round

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

[Quan Funds](https://millionrounds.com/fund/quan-funds) VC firm **1** round

Nest Bio no record of our own yet **1** round

OrbiMed/ Fidelity no record of our own yet **1** round

Rock Springs no record of our own yet **1** round

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

## Quick answers about resTORbio

### Who invested in resTORbio?

resTORbio's investors include OrbiMed, Fidelity, Quan Funds, Nest Bio and OrbiMed/ Fidelity, and 1 more on record.

### How much has resTORbio raised?

resTORbio has raised $90M across 2 rounds since 2017.

### When did resTORbio last raise?

resTORbio's most recent round was an Undisclosed round of $50M in Mar 2019.

### What was resTORbio's biggest round?

Its most recent round, $50M in Mar 2019, is also its largest on record.

### Who backed resTORbio first?

resTORbio's first round on record, in Nov 2017, was backed by Quan Funds, Nest Bio and OrbiMed/ Fidelity and 1 others.

### What stage is resTORbio at?

resTORbio's latest named round is an Undisclosed round, in Mar 2019.

### Where is resTORbio based?

resTORbio is based in the United States.

## Companies like resTORbio

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)[**AI** $18M · Oct 2026](https://millionrounds.com/company/ai)[**Baba** $40M · Oct 2026](https://millionrounds.com/company/baba)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)

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