# Ethyreal Bio funding: rounds and investors > Ethyreal Bio has raised $161M across 2 rounds since 2026. Investors include Atlas Venture, Medicxi Ventures and Avoro Capital. Every round with its source. Source: https://millionrounds.com/company/ethyreal-bio (Millionrounds; every figure on the page links to its filing or article) United States · [Series A startup](https://millionrounds.com/companies) # 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 summary Updated 26 Oct 2026 **$161M** raised across 2 rounds since 2026, from 2 sources **$60M** Series B **$101M** Series A - **Latest round:** Series A, $101M Jun 2026 - **Led by:** Atlas Venture and Medicxi Ventures - **Step-up i:** 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. 2026 2027 **$60M** Series B **$101M** Series A - **First round:** Series B, $60M - **Biggest round:** $101M - **Between rounds:** 5 months ## The rounds - **Jun 2026** Series A **$101M** *4 new* *1 returning* [Atlas Venture](https://millionrounds.com/fund/atlas-venture) Lead [Medicxi Ventures](https://millionrounds.com/fund/medicxi-ventures) Lead [Avoro Capital](https://millionrounds.com/fund/avoro-capital) [Checkpoint Capital](https://millionrounds.com/fund/checkpoint-capital) [Nandi Life Sciences](https://millionrounds.com/fund/nandi-life-sciences) Reported by Firms' own news pages - **Jan 2026** Series B **$60M** *1 new* [Atlas Venture](https://millionrounds.com/fund/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 B** 2026 **Series A** 2026 [Atlas Venture](https://millionrounds.com/fund/atlas-venture) L [Medicxi Ventures](https://millionrounds.com/fund/medicxi-ventures) L [Avoro Capital](https://millionrounds.com/fund/avoro-capital) [Checkpoint Capital](https://millionrounds.com/fund/checkpoint-capital) [Nandi Life Sciences](https://millionrounds.com/fund/nandi-life-sciences) ## Everyone who backed them [Atlas Venture](https://millionrounds.com/fund/atlas-venture) VC firm **2** rounds, led 1 [Medicxi Ventures](https://millionrounds.com/fund/medicxi-ventures) VC firm **1** round, led 1 [Avoro Capital](https://millionrounds.com/fund/avoro-capital) Investment firm **1** round [Checkpoint Capital](https://millionrounds.com/fund/checkpoint-capital) VC firm **1** round [Nandi Life Sciences](https://millionrounds.com/fund/nandi-life-sciences) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=ethyreal-bio). ## 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...](https://millionrounds.com/fund/avoro-capital-advi) Private equity Per 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. ### How much has Ethyreal Bio raised? Ethyreal Bio has raised $161M across 2 rounds since 2026. ### When did Ethyreal Bio last raise? Ethyreal Bio's most recent round was a Series A of $101M in Jun 2026, led by Atlas Venture. ### What was Ethyreal Bio's biggest round? Its most recent round, $101M in Jun 2026, is also its largest on record. ### Who backed Ethyreal Bio first? Ethyreal Bio's first round on record, in Jan 2026, was backed by Atlas Venture. ### What stage is Ethyreal Bio at? Ethyreal Bio's latest named round is a Series A, in Jun 2026. ### Where is Ethyreal Bio based? Ethyreal Bio is based in the United States. ### Who led Ethyreal Bio's rounds? Atlas Venture led the Series A in 2026. ## Companies like Ethyreal 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) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app