# Surrozen funding: rounds and investors > Surrozen has raised $258M across 3 rounds since 2017. Investors include RA Capital Management, Horizons Ventures and 5AM Ventures. Every round with its source. Source: https://millionrounds.com/company/surrozen (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *Surrozen* 3 rounds we have observed, with the 8 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 **$258M** raised across 3 rounds since 2017, from 3 sources **$33M** Series A **$50M** Series B **$175M** Round - **Latest round:** Round, $175M Mar 2025 - **Step-up i:** 3.5× - **Investors:** 8 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 **$33M** Series A **$50M** Series B **$175M** Round - **First round:** Series A, $33M - **Biggest round:** $175M - **Usual gap between rounds:** 5.9 years ## The rounds - **Mar 2025** Round **$175M** *4 new* [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [5AM Ventures](https://millionrounds.com/fund/5am-ventures) [Vivo Capital](https://millionrounds.com/fund/vivo-capital) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) Source recorded - **Mar 2019** Series B **$50M** *3 new* [Horizons Ventures](https://millionrounds.com/fund/horizons-ventures) [Hartford HealthCare Endowment](https://millionrounds.com/fund/hartford-healthcare-endowment) Column Group Reported by FinSMEs - **Feb 2017** Series A **$33M** *1 new* [The Column Group](https://millionrounds.com/fund/the-column-group) Reported by FinSMEs ## Founders and team From Surrozen's own website and the SEC filings it signed: 3 on the team. - **Andrew Maleki** Chief Financial Officer - **Charles Williams** Chief Operating Officer - **Craig Parker** Executive Officer, Director i On the board, as filed i *Anna Berkenblit* *David Goeddel* *Harold Varmus* *Tim Kutzkey* ## 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** 2019 **Round** 2025 [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [Horizons Ventures](https://millionrounds.com/fund/horizons-ventures) [5AM Ventures](https://millionrounds.com/fund/5am-ventures) [Vivo Capital](https://millionrounds.com/fund/vivo-capital) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) [The Column Group](https://millionrounds.com/fund/the-column-group) [Hartford HealthCare Endowment](https://millionrounds.com/fund/hartford-healthcare-endowment) Column Group ## Everyone who backed them [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Private equity **1** round [Horizons Ventures](https://millionrounds.com/fund/horizons-ventures) VC firm **1** round [5AM Ventures](https://millionrounds.com/fund/5am-ventures) VC firm **1** round [Vivo Capital](https://millionrounds.com/fund/vivo-capital) Private equity **1** round [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) VC firm **1** round [The Column Group](https://millionrounds.com/fund/the-column-group) VC firm **1** round [Hartford HealthCare Endowment](https://millionrounds.com/fund/hartford-healthcare-endowment) VC firm **1** round Column Group 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=surrozen). ## Quick answers about Surrozen ### Who invested in Surrozen? Surrozen's investors include RA Capital Management, Horizons Ventures, 5AM Ventures, Vivo Capital and Samsara BioCapital, and 3 more on record. ### How much has Surrozen raised? Surrozen has raised $258M across 3 rounds since 2017. ### When did Surrozen last raise? Surrozen's most recent round was an Undisclosed round of $175M in Mar 2025. ### What was Surrozen's biggest round? Its most recent round, $175M in Mar 2025, is also its largest on record. ### Who backed Surrozen first? Surrozen's first round on record, in Feb 2017, was backed by The Column Group. ### What stage is Surrozen at? Surrozen's latest named round is an Undisclosed round, in Mar 2025. ### Where is Surrozen based? Surrozen is based in the United States. ## Companies like Surrozen 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. Open the investor searchOr these rounds in the app