# Kaleido BioSciences funding: rounds and investors

> Kaleido BioSciences has raised $161M across 2 rounds since 2018. Investors include Fidelity, Invus and Flagship Pioneering. Every round with its source.

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

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

# Who invested in *Kaleido BioSciences*

2 rounds we have observed, with the 4 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

Funding summary Updated 26 Oct 2026

**$161M** raised across 2 rounds since 2018, from 2 sources

**$101M** Round **$60M** Round

- **Latest round:** Round, $60M Feb 2021
- **Biggest round:** $101M Round · Jun 2018
- **Investors:** 4

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.

2019 2020 2021

**$101M** Round

**$60M** Round

- **First round:** Round, $101M
- **Biggest round:** $101M
- **Between rounds:** 2.6 years

## The rounds

- **Feb 2021** Round **$60M** *1 new* *2 returning* [Fidelity](https://millionrounds.com/fund/fidelity) [Invus](https://millionrounds.com/fund/invus) [Flagship Pioneering](https://millionrounds.com/fund/flagship-pioneering) Source recorded
- **Jun 2018** Round **$101M** *3 new* [Fidelity](https://millionrounds.com/fund/fidelity) [Invus](https://millionrounds.com/fund/invus) Rock Springs Reported by Bostonglobe

## 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.

**Round** 2018 **Round** 2021 [Fidelity](https://millionrounds.com/fund/fidelity) [Invus](https://millionrounds.com/fund/invus) [Flagship Pioneering](https://millionrounds.com/fund/flagship-pioneering) Rock Springs

## Everyone who backed them

[Fidelity](https://millionrounds.com/fund/fidelity) VC firm **2** rounds

[Invus](https://millionrounds.com/fund/invus) Private equity **2** rounds

[Flagship Pioneering](https://millionrounds.com/fund/flagship-pioneering) VC firm **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=kaleido-biosciences).

## Quick answers about Kaleido BioSciences

### Who invested in Kaleido BioSciences?

Kaleido BioSciences's investors include Fidelity, Invus, Flagship Pioneering and Rock Springs.

### How much has Kaleido BioSciences raised?

Kaleido BioSciences has raised $161M across 2 rounds since 2018.

### When did Kaleido BioSciences last raise?

Kaleido BioSciences's most recent round was an Undisclosed round of $60M in Feb 2021.

### What was Kaleido BioSciences's biggest round?

Kaleido BioSciences's largest round on record is $101M (Undisclosed round), in Jun 2018.

### Who backed Kaleido BioSciences first?

Kaleido BioSciences's first round on record, in Jun 2018, was backed by Fidelity, Invus and Rock Springs.

### What stage is Kaleido BioSciences at?

Kaleido BioSciences's latest named round is an Undisclosed round, in Feb 2021.

### Where is Kaleido BioSciences based?

Kaleido BioSciences is based in the United States.

## Companies like Kaleido BioSciences

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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