# Cytospire Therapeutics funding: rounds and investors > Cytospire Therapeutics has raised $121M across 4 rounds since 2023. Investors include 4BIO Capital, British Business Bank and Abingworth. Source: https://millionrounds.com/company/cytospire-therapeutics (Millionrounds; every figure on the page links to its filing or article) United Kingdom · [Series A startup](https://millionrounds.com/companies) # Who invested in *Cytospire Therapeutics* 4 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 Raised 6 months ago Follow Cytospire Therapeutics and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fcytospire-therapeutics) Funding summary Updated 15 Nov 2026 **$121M** raised across 4 rounds since 2023, from 5 sources **$12M** Seed **$18M** Seed **$7.9M** Seed **$83M** Series A - **Latest round:** Series A, $83M May 2026 - **Led by:** 4BIO Capital - **Step-up i:** 10.5× - **Investors:** 10 (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. 2024 2025 2026 **$12M** Seed **$18M** Seed **$7.9M** Seed **$83M** Series A - **First round:** Seed, $12M - **Biggest round:** $83M - **Usual gap between rounds:** 10 months ## The rounds - **May 2026** Series A **$83M** *10 new* [4BIO Capital](https://millionrounds.com/fund/4bio-capital) Lead [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund) [Abingworth](https://millionrounds.com/fund/abingworth) [LifeArc Ventures](https://millionrounds.com/fund/lifearc-ventures) [Modi Ventures](https://millionrounds.com/fund/modi-ventures) [Sound Bioventures](https://millionrounds.com/fund/sound-bioventures) [Medical Incubator Japan K.K.](https://millionrounds.com/fund/medical-incubator-japan-k-k) [Criteria Bio Ventures](https://millionrounds.com/fund/criteria-bio-ventures) [Pathway Bioventures](https://millionrounds.com/fund/pathway-bioventures) [Servier](https://millionrounds.com/fund/servier) Reported by Ventureburn and 1 other - **Oct 2024** Seed **$7.9M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Nov 2023** Seed **$18M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **May 2023** Seed **$12M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet ## Funding filed with regulators Cytospire Therapeutics filed 6 raises, $40M in all. Filings say how much was sold and to how many investors; they never name the investors. - May 2026 **$4.6M** UK share allotment - Mar 2026 **$9.8M** UK share allotment - Mar 2026 **$6.3M** UK share allotment - Oct 2024 **$3.9M** UK share allotment - Nov 2023 **$8.9M** UK share allotment - May 2023 **$6.2M** UK share allotment ## 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. **Seed** 2023 **Seed** 2023 **Seed** 2024 **Series A** 2026 [4BIO Capital](https://millionrounds.com/fund/4bio-capital) L [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund) [Abingworth](https://millionrounds.com/fund/abingworth) [LifeArc Ventures](https://millionrounds.com/fund/lifearc-ventures) [Modi Ventures](https://millionrounds.com/fund/modi-ventures) [Sound Bioventures](https://millionrounds.com/fund/sound-bioventures) [Medical Incubator Japan K.K.](https://millionrounds.com/fund/medical-incubator-japan-k-k) [Criteria Bio Ventures](https://millionrounds.com/fund/criteria-bio-ventures) [Pathway Bioventures](https://millionrounds.com/fund/pathway-bioventures) [Servier](https://millionrounds.com/fund/servier) ## Everyone who backed them [4BIO Capital](https://millionrounds.com/fund/4bio-capital) VC firm **1** round, led 1 [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund) Corporate VC **1** round [Abingworth](https://millionrounds.com/fund/abingworth) VC firm **1** round [LifeArc Ventures](https://millionrounds.com/fund/lifearc-ventures) VC firm **1** round [Modi Ventures](https://millionrounds.com/fund/modi-ventures) VC firm **1** round [Sound Bioventures](https://millionrounds.com/fund/sound-bioventures) VC firm **1** round [Medical Incubator Japan K.K.](https://millionrounds.com/fund/medical-incubator-japan-k-k) VC firm **1** round [Criteria Bio Ventures](https://millionrounds.com/fund/criteria-bio-ventures) Corporate VC **1** round [Pathway Bioventures](https://millionrounds.com/fund/pathway-bioventures) VC firm **1** round [Servier](https://millionrounds.com/fund/servier) Corporate VC **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=cytospire-therapeutics). ## Quick answers about Cytospire Therapeutics ### Who invested in Cytospire Therapeutics? Cytospire Therapeutics's investors include 4BIO Capital, British Business Bank, Abingworth, LifeArc Ventures and Modi Ventures, and 5 more on record. 4BIO Capital led its latest round. ### How much has Cytospire Therapeutics raised? Cytospire Therapeutics has raised $121M across 4 rounds since 2023. ### When did Cytospire Therapeutics last raise? Cytospire Therapeutics's most recent round was a Series A of $83M in May 2026, led by 4BIO Capital. ### What was Cytospire Therapeutics's biggest round? Its most recent round, $83M in May 2026, is also its largest on record. ### Who backed Cytospire Therapeutics first? Cytospire Therapeutics's first round on record, in May 2026, was backed by 4BIO Capital, British Business Bank and Abingworth and 7 others. ### What stage is Cytospire Therapeutics at? Cytospire Therapeutics's latest named round is a Series A, in May 2026. ### Where is Cytospire Therapeutics based? Cytospire Therapeutics is based in the United Kingdom. ### Who led Cytospire Therapeutics's rounds? 4BIO Capital led the Series A in 2026. ## Companies like Cytospire Therapeutics In the same sector, and raised in the last eighteen months. [**Tolemy Bio** $3.1M · Nov 2026](https://millionrounds.com/company/tolemy-bio)[**Neobe Therapeutics** $9.1M · Nov 2026](https://millionrounds.com/company/neobe-therapeutics)[**Bioliberty** $22M · Nov 2026](https://millionrounds.com/company/bioliberty)[**T-Therapeutics** $279M · Nov 2026](https://millionrounds.com/company/t-therapeutics)[**Alethio Therapeutics** $98M · Nov 2026](https://millionrounds.com/company/alethio-therapeutics)[**bit.bio** $264M · Nov 2026](https://millionrounds.com/company/bit-bio) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. 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