Who invested in Ethyreal Bio

2 rounds we have observed, with the 5 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

Raised 5 months ago

Funding summaryUpdated 26 Oct 2026

$161Mraised across 2 rounds since 2026, from 2 sources

$60MSeries B$101MSeries A

Latest round: Series A, $101MJun 2026
Led by: Atlas Venture and Medicxi Ventures
Step-upi: 1.7×
Investors: 5 (2 led)

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.

20262027

$60MSeries B$101MSeries A

First round: Series B, $60M
Biggest round: $101M
Between rounds: 5 months

The rounds

Jun 2026
Series A$101M4 new1 returning
Reported by Firms' own news pages
Jan 2026
Series B$60M1 new
- Atlas Venture
Source recorded

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 B2026Series A2026

Atlas VentureLMedicxi VenturesLAvoro CapitalCheckpoint Capital

Nandi Life Sciences

Everyone who backed them

Atlas VentureVC firm2rounds, led 1

Medicxi VenturesVC firm1round, led 1

Avoro CapitalInvestment firm1round

Checkpoint CapitalVC firm1round

Nandi Life SciencesVC firm1round

Missing a round, or an investor who was in one? Tell us.

Also claim to have backed them

This firm lists Ethyreal Bio as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

Avoro Capital Advi...Private equityPer its own site

Quick answers about Ethyreal Bio

Who invested in Ethyreal Bio?

Ethyreal Bio's investors include Atlas Venture, Medicxi Ventures, Avoro Capital, Checkpoint Capital and Nandi Life Sciences. Atlas Venture led its latest round.