# Owlstone Medical funding: rounds and investors > Owlstone Medical has raised $153M across 6 rounds since 2017. Investors include Gates Foundation, Ventura Capital and Horizons Ventures. Source: https://millionrounds.com/company/owlstone-medical (Millionrounds; every figure on the page links to its filing or article) United Kingdom · [Series E startup](https://millionrounds.com/companies) # Who invested in *Owlstone Medical* 6 rounds we have observed, with the 7 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 Healthtech Medical Devices Funding summary Updated 26 Oct 2026 **$153M** raised across 6 rounds since 2017, from 7 sources **$11M** Round **$15M** Round **$35M** Round **$58M** Round **$6.5M** Round **$27M** Series E - **Latest round:** Series E, $27M Jan 2025 - **Led by:** Ventura Capital - **Biggest round:** $58M Round · Aug 2021 - **Step-up i:** 4.2× - **Investors:** 7 (1 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. 2017 2019 2021 2023 2025 **$11M** Round **$15M** Round **$35M** Round **$58M** Round **$6.5M** Round **$27M** Series E - **First round:** Round, $11M - **Biggest round:** $58M - **Usual gap between rounds:** 14 months ## The rounds - **Jan 2025** Series E **$27M** *3 new* *1 returning* [Ventura Capital](https://millionrounds.com/fund/ventura-capital) Lead [Horizons Ventures](https://millionrounds.com/fund/horizons-ventures) [Gates Foundation](https://millionrounds.com/fund/bill-and-melinda-gates-foundation) [Aviva Ventures](https://millionrounds.com/fund/aviva-ventures) Reported by Firms' own news pages and 1 other - **Apr 2024** Round **$6.5M** *1 new* [Gates Foundation](https://millionrounds.com/fund/bill-and-melinda-gates-foundation) Reported by Firms' own news pages - **Aug 2021** Round **$58M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Oct 2018** Round **$35M** *2 new* Foxco Horizons Ventures/ Ventura Reported by Businessweekly - **Mar 2018** Round **$15M** *1 new* Horizons Ventures/ Aviva Reported by FinSMEs - **Jan 2017** Round **$11M** No investor was named in the report. Reported by FinSMEs ## Funding filed with regulators Owlstone Medical filed 5 raises, $88M in all. Filings say how much was sold and to how many investors; they never name the investors. - May 2025 **$1.6M** UK share allotment - Mar 2025 **$1.4M** UK share allotment - Jan 2025 **$27M** UK share allotment - Aug 2021 **$23M** UK share allotment - Aug 2021 **$35M** UK share allotment ## Founders and team From Owlstone Medical's own website: 2 founders, 22 on the team. **Billy Boyle** Co-Founder and CEO **David Ruiz-Alonso** Co-Founder and COO - **Mark Capone** CEO at Precision Medicine Advisors - **Dr Max Allsworth** Chief Science Officer - **Neil Tween** Chief Financial Officer - **Dr Matthew Hart** VP of Chemical Protection - **Dr. Russell Parris** VP of R&D Science - **Elizabeth Crone** Head of Business Development - **Julia Greenwood** VP Programme – Research Products and Services - **Kevin Chalmers** VP Engineering & Operations - **Lauren Brown** Head of Operational Capability - **Olga Gandelman** Head of Hepatology - **Pam Lauder** Head of Finance - **Robert McCarthy** VP Programme – Point of Care - **Veronika Koenig-Roach** Head of Legal - **Andrea Bowyer** Quality Assurance Officer - **Dr Doug Wright** Medical Director Aviva - **Emily Manning** Associate Project Manager - **Joshua Bates** Senior Systems Engineer - **Luke Cartwright** Principal Analytical Scientist And 4 more on the team. Advisers *Dr Marc van der Schee* *Dr. Alan Boobis* *Dr. Patrick M. Bossuyt* ## 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. **Round** 2017 **Round** 2018 **Round** 2018 **Round** 2021 **Round** 2024 **Series E** 2025 [Gates Foundation](https://millionrounds.com/fund/bill-and-melinda-gates-foundation) [Ventura Capital](https://millionrounds.com/fund/ventura-capital) L [Horizons Ventures](https://millionrounds.com/fund/horizons-ventures) [Aviva Ventures](https://millionrounds.com/fund/aviva-ventures) Foxco Horizons Ventures/ Aviva Horizons Ventures/ Ventura ## Everyone who backed them [Gates Foundation](https://millionrounds.com/fund/bill-and-melinda-gates-foundation) Institutional LP **2** rounds [Ventura Capital](https://millionrounds.com/fund/ventura-capital) Growth equity **1** round, led 1 [Horizons Ventures](https://millionrounds.com/fund/horizons-ventures) VC firm **1** round [Aviva Ventures](https://millionrounds.com/fund/aviva-ventures) VC firm **1** round Foxco no record of our own yet **1** round Horizons Ventures/ Aviva no record of our own yet **1** round Horizons Ventures/ Ventura 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=owlstone-medical). ## Also claim to have backed them These 2 firms list Owlstone Medical as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above. [LifeX Ventures](https://millionrounds.com/fund/lifex-ventures) VC firm Per its own site [Vault investments](https://millionrounds.com/fund/vault-investments) Private equity Per its own site ## Quick answers about Owlstone Medical ### Who invested in Owlstone Medical? Owlstone Medical's investors include Gates Foundation, Ventura Capital, Horizons Ventures, Aviva Ventures and Foxco, and 2 more on record. Ventura Capital led its latest round. ### How much has Owlstone Medical raised? Owlstone Medical has raised $153M across 6 rounds since 2017. ### When did Owlstone Medical last raise? Owlstone Medical's most recent round was a Series E of $27M in Jan 2025, led by Ventura Capital. ### What was Owlstone Medical's biggest round? Owlstone Medical's largest round on record is $58M, in Aug 2021. ### Who backed Owlstone Medical first? Owlstone Medical's first round on record, in Mar 2018, was backed by Horizons Ventures/ Aviva. ### What stage is Owlstone Medical at? Owlstone Medical's latest named round is a Series E, in Jan 2025. ### Where is Owlstone Medical based? Owlstone Medical is based in the United Kingdom. ### Who led Owlstone Medical's rounds? Ventura Capital led the Series E in 2025. ## Companies like Owlstone Medical In the same sector, and raised in the last eighteen months. [**Coherence Neuro** $55M · Oct 2026](https://millionrounds.com/company/coherence-neuro)[**HydRegen** $12M · Oct 2026](https://millionrounds.com/company/hydregen)[**XRlabs** $8.4M · Oct 2026](https://millionrounds.com/company/xrlabs)[**Respiratory Analytics** $2.8M · Oct 2026](https://millionrounds.com/company/respiratory-analytics)[**OMass Therapeutics** $442M · Oct 2026](https://millionrounds.com/company/omass-therapeutics)[**Scarlet** $68M · Oct 2026](https://millionrounds.com/company/scarlet) ## 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