# Istesso funding: rounds and investors > Istesso has raised $29M across 3 rounds since 2019. Investors include Parkwalk and IP Group. Every round with its source. Source: https://millionrounds.com/company/istesso (Millionrounds; every figure on the page links to its filing or article) United Kingdom · [Venture startup](https://millionrounds.com/companies) # Who invested in *Istesso* 3 rounds we have observed, with the 2 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 **$29M** raised across 3 rounds since 2019, from 3 sources **$5.2M** Round **$13M** Venture **$11M** Round - **Latest round:** Round, $11M Apr 2023 - **Biggest round:** $13M Venture · Feb 2019 - **Investors:** 2 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. 2019 2020 2021 2022 2023 **$5.2M** Round **$13M** Venture **$11M** Round - **First round:** Round, $5.2M - **Biggest round:** $13M - **Between rounds:** 4.3 years ## The rounds - **Apr 2023** Round **$11M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Feb 2019** Round **$5.2M** No investor was named in the report. Reported by Ipgroupplc - **Feb 2019** Venture **$13M** *2 new* [Parkwalk](https://millionrounds.com/fund/parkwalk) [IP Group](https://millionrounds.com/fund/ip-group) Source recorded ## Funding filed with regulators Istesso filed one raise, $11M in all. Filings say how much was sold and to how many investors; they never name the investors. - Apr 2023 **$11M** UK share allotment ## Founders and team From Istesso's own website: 2 founders, 8 on the team. **Lisa Patel** Chief Executive Officer, Co-Founder **Sam Williams** Chairman, Co-Founder - **Andrea Haynes** Head of Translational Sciences - **Craig Richardson** Board - **Dr Michael Owen** Non-Executive Director - **Fatima Garcia-Raposo** Project Manager - **Gemma Vallance** Operations Manager - **Greg Smith** Non-Executive Director - **Peter Allen** Non-Executive Director - **Professor Sir Keith Peters** Non-Executive 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. **Round** 2019 **Venture** 2019 **Round** 2023 [Parkwalk](https://millionrounds.com/fund/parkwalk) [IP Group](https://millionrounds.com/fund/ip-group) ## Everyone who backed them [Parkwalk](https://millionrounds.com/fund/parkwalk) VC firm **1** round [IP Group](https://millionrounds.com/fund/ip-group) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=istesso). ## Also claim to have backed them This firm lists Istesso 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. [Touchstone Innovations](https://millionrounds.com/fund/touchstone-innovations) VC firm Per its own site ## Quick answers about Istesso ### Who invested in Istesso? Istesso's investors include Parkwalk and IP Group. ### How much has Istesso raised? Istesso has raised $29M across 3 rounds since 2019. ### When did Istesso last raise? Istesso's most recent round, $11M, was in Apr 2023. ### What was Istesso's biggest round? Istesso's largest round on record is $13M (Venture), in Feb 2019. ### Who backed Istesso first? Istesso's first round on record, in Feb 2019, was backed by Parkwalk and IP Group. ### What stage is Istesso at? Istesso's latest named round is a Venture, in Feb 2019. ### Where is Istesso based? Istesso is based in the United Kingdom. ## Companies like Istesso 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)[**OMass Therapeutics** $442M · Oct 2026](https://millionrounds.com/company/omass-therapeutics)[**CMR Surgical** $1.1B · Oct 2026](https://millionrounds.com/company/cmr-surgical)[**MintNeuro** $26M · Oct 2026](https://millionrounds.com/company/mintneuro) ## 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