# Gossamer Bio funding: rounds and investors > Gossamer Bio has raised $567M across 4 rounds since 2017. Investors include Omega Funds, ARCH Venture Partners and New Enterprise Associates. Source: https://millionrounds.com/company/gossamer-bio (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *Gossamer Bio* 4 rounds we have observed, with the 10 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 Raised 2 months ago Funding summary Updated 26 Oct 2026 **$567M** raised across 4 rounds since 2017, from 4 sources **$100M** Series A **$230M** Series B **$212M** Round **$25M** Round - **Latest round:** Round, $25M Sept 2026 - **Biggest round:** $230M Series B · Jul 2018 - **Investors:** 10 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. 2017 2019 2021 2023 2025 **$100M** Series A **$230M** Series B **$212M** Round **$25M** Round - **First round:** Series A, $100M - **Biggest round:** $230M - **Usual gap between rounds:** 3.2 years ## The rounds - **Sept 2026** Round **$25M** No investor was named in the report. Filed with the SEC (Form D); no report of this raise yet SEC filing: $25M sold, first sale Sept 2026 - **Jul 2023** Round **$212M** *4 new* *2 returning* [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [Hill House Capital](https://millionrounds.com/fund/hill-house-capital) [Omega Funds](https://millionrounds.com/fund/omega-funds) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) Source recorded SEC filing: $212M sold, first sale Jul 2023 - **Jul 2018** Series B **$230M** *4 new* *1 returning* [Omega Funds](https://millionrounds.com/fund/omega-funds) [Arch](https://millionrounds.com/fund/arch) [Goldbell Group](https://millionrounds.com/fund/polaris) Baupost Group Hillhouse Capital/ Invus Reported by Biospace SEC filing: $230M sold, first sale Jul 2018 - **Jan 2017** Series A **$100M** *2 new* [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [Omega Funds](https://millionrounds.com/fund/omega-funds) Reported by FinSMEs ## Founders and team From Gossamer Bio's own website: 1 founder, 14 on the team. **Faheem Hasnain** Co-Founder, Chairman, and Chief Executive Officer - **Christian Waage** Executive Vice President, Technical Operations & General Counsel - **Conor O’Donovan** Senior Vice President, Regulatory Affairs - **Jeanine Anthony** Senior Vice President, Marketing - **Lou Cherico** Senior Vice President, Finance & Treasury - **Bob Smith** Chief Commercial Officer - **Bryan Giraudo** Chief Operating Officer & Chief Financial Officer - **Caryn Peterson** Chief Development Officer - **Greg Ciongoli** Director - **John Quisel** Director - **Russell J. Cox** Director - **Sandra Milligan** Director - **Skye Drynan** Director - **Steven D. Nathan** Director - **Thomas Daniel** Director ## 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 A** 2017 **Series B** 2018 **Round** 2023 **Round** 2026 [Omega Funds](https://millionrounds.com/fund/omega-funds) [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Hill House Capital](https://millionrounds.com/fund/hill-house-capital) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) [Arch](https://millionrounds.com/fund/arch) [Goldbell Group](https://millionrounds.com/fund/polaris) Baupost Group Hillhouse Capital/ Invus ## Everyone who backed them [Omega Funds](https://millionrounds.com/fund/omega-funds) VC firm **3** rounds [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) VC firm **2** rounds [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) VC firm **1** round [Polaris Partners](https://millionrounds.com/fund/polaris-partners) VC firm **1** round [Hill House Capital](https://millionrounds.com/fund/hill-house-capital) Family office **1** round [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) VC firm **1** round [Arch](https://millionrounds.com/fund/arch) Hedge fund **1** round [Goldbell Group](https://millionrounds.com/fund/polaris) Growth equity **1** round Baupost Group no record of our own yet **1** round Hillhouse Capital/ Invus 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=gossamer-bio). ## Also claim to have backed them This firm lists Gossamer 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. [EcoR1 Capital](https://millionrounds.com/fund/ecor1-capital) Private equity Per its own site ## Quick answers about Gossamer Bio ### Who invested in Gossamer Bio? Gossamer Bio's investors include Omega Funds, ARCH Venture Partners, New Enterprise Associates, Polaris Partners and Hill House Capital, and 5 more on record. ### How much has Gossamer Bio raised? Gossamer Bio has raised $567M across 4 rounds since 2017. ### When did Gossamer Bio last raise? Gossamer Bio's most recent round, $25M, was in Sept 2026. ### What was Gossamer Bio's biggest round? Gossamer Bio's largest round on record is $230M (Series B), in Jul 2018. ### Who backed Gossamer Bio first? Gossamer Bio's first round on record, in Jan 2017, was backed by ARCH Venture Partners and Omega Funds. ### What stage is Gossamer Bio at? Gossamer Bio's latest named round is an Undisclosed round, in Jul 2023. ### Where is Gossamer Bio based? Gossamer Bio is based in the United States. ## Companies like Gossamer 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)[**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) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. 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