# Boundless Bio funding: rounds and investors > Boundless Bio has raised $146M across 2 rounds since 2019. Investors include ARCH Venture Partners, City Hill Ventures and RA Capital Management. Source: https://millionrounds.com/company/boundless-bio (Millionrounds; every figure on the page links to its filing or article) United States · [Series C startup](https://millionrounds.com/companies) # Who invested in *Boundless Bio* 2 rounds we have observed, with the 11 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 **$146M** raised across 2 rounds since 2019, from 2 sources **$46M** Series A **$100M** Series C - **Latest round:** Series C, $100M May 2023 - **Step-up i:** 2.2× - **Investors:** 11 (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. 2020 2021 2022 2023 **$46M** Series A **$100M** Series C - **First round:** Series A, $46M - **Biggest round:** $100M - **Between rounds:** 3.6 years ## The rounds - **May 2023** Series C **$100M** *5 new* *1 returning* [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [Fidelity](https://millionrounds.com/fund/fidelity) [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [Wellington Management](https://millionrounds.com/fund/wellington-management) [Vertex Ventures](https://millionrounds.com/fund/vertex-ventures) [Redmile Group](https://millionrounds.com/fund/redmile-group) Source recorded SEC filing: $100M sold, first sale Apr 2023 - **Sept 2019** Series A **$46M** *6 new* [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) Lead [City Hill Ventures](https://millionrounds.com/fund/city-hill-ventures) Lead [Vertex Ventures China](https://millionrounds.com/fund/vertex-ventures-china) [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) [GT Healthcare Capital Partners](https://millionrounds.com/fund/gt-healthcare-capital-partners) [Boxer Capital of the Tavistock Group](https://millionrounds.com/fund/boxer-capital-of-the-tavistock-group) Reported by FinSMEs ## Founders and team From Boundless Bio's own website and the SEC filings it signed: 6 on the team. - **Angela Pietrofeso** Vice President, Clinical Operations - **David Hinkle** Senior Vice President, Finance & Controller - **Jessica Oien** Chief Legal Officer - **Meredith Wesley** Chief Human Resources Officer - **Jennifer D. Lew** Director - **Zachary D. Hornby** Director, Executive Officer i On the board, as filed i *Benjamin D. Cravatt* *Christine D. Brennan* *Fabio D. Pucci* *Jakob D. Loven* *Jonathan D. Lim* *Kristina D. Burow* ## 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** 2023 [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) L [City Hill Ventures](https://millionrounds.com/fund/city-hill-ventures) L [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [Fidelity](https://millionrounds.com/fund/fidelity) [Wellington Management](https://millionrounds.com/fund/wellington-management) [Vertex Ventures](https://millionrounds.com/fund/vertex-ventures) [Vertex Ventures China](https://millionrounds.com/fund/vertex-ventures-china) [Redmile Group](https://millionrounds.com/fund/redmile-group) [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) [GT Healthcare Capital Partners](https://millionrounds.com/fund/gt-healthcare-capital-partners) ## Everyone who backed them [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) VC firm **2** rounds, led 1 [City Hill Ventures](https://millionrounds.com/fund/city-hill-ventures) VC firm **1** round, led 1 [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Private equity **1** round [Fidelity](https://millionrounds.com/fund/fidelity) VC firm **1** round [Wellington Management](https://millionrounds.com/fund/wellington-management) VC firm **1** round [Vertex Ventures](https://millionrounds.com/fund/vertex-ventures) VC firm **1** round [Vertex Ventures China](https://millionrounds.com/fund/vertex-ventures-china) VC firm **1** round [Redmile Group](https://millionrounds.com/fund/redmile-group) VC firm **1** round [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) VC firm **1** round [GT Healthcare Capital Partners](https://millionrounds.com/fund/gt-healthcare-capital-partners) VC firm **1** round [Boxer Capital of the Tavistock Group](https://millionrounds.com/fund/boxer-capital-of-the-tavistock-group) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=boundless-bio). ## Also claim to have backed them This firm lists Boundless 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. [Nextech Invest](https://millionrounds.com/fund/nextech-invest) Private equity Per its own site ## Quick answers about Boundless Bio ### Who invested in Boundless Bio? Boundless Bio's investors include ARCH Venture Partners, City Hill Ventures, RA Capital Management, Fidelity and Wellington Management, and 6 more on record. ### How much has Boundless Bio raised? Boundless Bio has raised $146M across 2 rounds since 2019. ### When did Boundless Bio last raise? Boundless Bio's most recent round was a Series C of $100M in May 2023. ### What was Boundless Bio's biggest round? Its most recent round, $100M in May 2023, is also its largest on record. ### Who backed Boundless Bio first? Boundless Bio's first round on record, in Sept 2019, was backed by ARCH Venture Partners, City Hill Ventures and Vertex Ventures China and 3 others. ### What stage is Boundless Bio at? Boundless Bio's latest named round is a Series C, in May 2023. ### Where is Boundless Bio based? Boundless Bio is based in the United States. ### Who led Boundless Bio's rounds? ARCH Venture Partners led the Series A in 2019. ## Companies like Boundless 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. Open the investor searchOr these rounds in the app