# ArsenalBio funding: rounds and investors > ArsenalBio has raised $410M across 2 rounds since 2019. Investors include Kleiner Perkins, ARCH Venture Partners and nVentures. Every round with its source. Source: https://millionrounds.com/company/arsenalbio (Millionrounds; every figure on the page links to its filing or article) United States · [Series C startup](https://millionrounds.com/companies) # Who invested in *ArsenalBio* 2 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 Funding summary Updated 26 Oct 2026 **$410M** raised across 2 rounds since 2019, from 2 sources **$85M** Series A **$325M** Series C - **Latest round:** Series C, $325M Sept 2024 - **Step-up i:** 3.8× - **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. 2020 2021 2022 2023 2024 **$85M** Series A **$325M** Series C - **First round:** Series A, $85M - **Biggest round:** $325M - **Between rounds:** 4.9 years ## The rounds - **Sept 2024** Series C **$325M** *3 new* *1 returning* [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [nVentures](https://millionrounds.com/fund/nventures-2) [Hitachi Ventures](https://millionrounds.com/fund/hitachi-ventures) Source recorded - **Oct 2019** Series A **$85M** *7 new* [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) [Osage University Partners](https://millionrounds.com/fund/osage-university-partners) [Euclidean Capital](https://millionrounds.com/fund/euclidean-capital) [Westlake Village Biopartners](https://millionrounds.com/fund/westlake-biopartners) Parker Institute for Cancer Immunotherapy San Francisco the University of California Reported by FinSMEs ## 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** 2019 **Series C** 2024 [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [nVentures](https://millionrounds.com/fund/nventures-2) [Osage University Partners](https://millionrounds.com/fund/osage-university-partners) [Hitachi Ventures](https://millionrounds.com/fund/hitachi-ventures) [Euclidean Capital](https://millionrounds.com/fund/euclidean-capital) [Westlake Village Biopartners](https://millionrounds.com/fund/westlake-biopartners) Parker Institute for Cancer Immunotherapy San Francisco the University of California ## Everyone who backed them [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) VC firm **2** rounds [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) VC firm **1** round [nVentures](https://millionrounds.com/fund/nventures-2) VC firm **1** round [Osage University Partners](https://millionrounds.com/fund/osage-university-partners) VC firm **1** round [Hitachi Ventures](https://millionrounds.com/fund/hitachi-ventures) Corporate VC **1** round [Euclidean Capital](https://millionrounds.com/fund/euclidean-capital) Family office **1** round [Westlake Village Biopartners](https://millionrounds.com/fund/westlake-biopartners) Accelerator **1** round Parker Institute for Cancer Immunotherapy no record of our own yet **1** round San Francisco no record of our own yet **1** round the University of California 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=arsenalbio). ## Quick answers about ArsenalBio ### Who invested in ArsenalBio? ArsenalBio's investors include Kleiner Perkins, ARCH Venture Partners, nVentures, Osage University Partners and Hitachi Ventures, and 5 more on record. ### How much has ArsenalBio raised? ArsenalBio has raised $410M across 2 rounds since 2019. ### When did ArsenalBio last raise? ArsenalBio's most recent round was a Series C of $325M in Sept 2024. ### What was ArsenalBio's biggest round? Its most recent round, $325M in Sept 2024, is also its largest on record. ### Who backed ArsenalBio first? ArsenalBio's first round on record, in Oct 2019, was backed by Kleiner Perkins, Osage University Partners and Euclidean Capital and 4 others. ### What stage is ArsenalBio at? ArsenalBio's latest named round is a Series C, in Sept 2024. ### Where is ArsenalBio based? ArsenalBio is based in the United States. ## Companies like ArsenalBio 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