# Isembard funding: rounds and investors > Isembard has raised $59M across 2 rounds since 2025. Investors include Notion Capital, Union Square Ventures and IQ Capital. Every round with its source. Source: https://millionrounds.com/company/isembard (Millionrounds; every figure on the page links to its filing or article) United Kingdom · [Series A startup](https://millionrounds.com/companies) # Who invested in *Isembard* 2 rounds we have observed, with the 16 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. Aerospace & Space AI Defence Tech Energy Raised 8 months ago Follow Isembard and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fisembard) Funding summary Updated 5 Nov 2026 **$59M** raised across 2 rounds since 2025, from 2 sources **$9.3M** Seed **$50M** Series A - **Latest round:** Series A, $50M Mar 2026 - **Led by:** Union Square Ventures - **Step-up i:** 5.4× - **Investors:** 16 (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. 2026 **$9.3M** Seed **$50M** Series A - **First round:** Seed, $9.3M - **Biggest round:** $50M - **Between rounds:** 11 months ## The rounds - **Mar 2026** Series A **$50M** *7 new* *1 returning* [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) Lead [Notion Capital](https://millionrounds.com/fund/notion-capital) [IQ Capital](https://millionrounds.com/fund/iq-capital) [Tamarack Global](https://millionrounds.com/fund/tamarack-global-2) [CIV](https://millionrounds.com/fund/civ) [Alex Bouaziz](https://millionrounds.com/fund/alex-bouaziz) [Andrei Danescu](https://millionrounds.com/fund/andrei-danescu) [Matt Briers](https://millionrounds.com/fund/matt-briers) Reported by Ventureburn - **Apr 2025** Seed **$9.3M** *9 new* [Notion Capital](https://millionrounds.com/fund/notion-capital) Lead [201 Ventures](https://millionrounds.com/fund/201-ventures) [Andreas Klinger](https://millionrounds.com/fund/andreas-klinger) [Basis Capital](https://millionrounds.com/fund/basis-capital) [Fund Forward](https://millionrounds.com/fund/fund-forward) [Joshua Western](https://millionrounds.com/fund/joshua-western) [Material Ventures](https://millionrounds.com/fund/material-ventures) [NP-Hard Ventures](https://millionrounds.com/fund/np-hard-ventures) [Neverlift Ventures](https://millionrounds.com/fund/neverlift-ventures) Reported by TechCrunch ## Funding filed with regulators Isembard filed 2 raises, $40M in all. Filings say how much was sold and to how many investors; they never name the investors. - Mar 2026 **$35M** UK share allotment - Mar 2025 **$5.2M** 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** 2025 **Series A** 2026 [Notion Capital](https://millionrounds.com/fund/notion-capital) L [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) L [IQ Capital](https://millionrounds.com/fund/iq-capital) [Tamarack Global](https://millionrounds.com/fund/tamarack-global-2) [CIV](https://millionrounds.com/fund/civ) [Alex Bouaziz](https://millionrounds.com/fund/alex-bouaziz) [201 Ventures](https://millionrounds.com/fund/201-ventures) [Andreas Klinger](https://millionrounds.com/fund/andreas-klinger) [Andrei Danescu](https://millionrounds.com/fund/andrei-danescu) [Basis Capital](https://millionrounds.com/fund/basis-capital) ## Everyone who backed them [Notion Capital](https://millionrounds.com/fund/notion-capital) VC firm **2** rounds, led 1 [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) VC firm **1** round, led 1 [IQ Capital](https://millionrounds.com/fund/iq-capital) VC firm **1** round [Tamarack Global](https://millionrounds.com/fund/tamarack-global-2) VC firm **1** round [CIV](https://millionrounds.com/fund/civ) Venture studio **1** round [Alex Bouaziz](https://millionrounds.com/fund/alex-bouaziz) VC firm **1** round [201 Ventures](https://millionrounds.com/fund/201-ventures) VC firm **1** round [Andreas Klinger](https://millionrounds.com/fund/andreas-klinger) Micro VC **1** round [Andrei Danescu](https://millionrounds.com/fund/andrei-danescu) Angel **1** round [Basis Capital](https://millionrounds.com/fund/basis-capital) VC firm **1** round [Fund Forward](https://millionrounds.com/fund/fund-forward) VC firm **1** round [Joshua Western](https://millionrounds.com/fund/joshua-western) VC firm **1** round [Material Ventures](https://millionrounds.com/fund/material-ventures) VC firm **1** round [Matt Briers](https://millionrounds.com/fund/matt-briers) Angel **1** round [Neverlift Ventures](https://millionrounds.com/fund/neverlift-ventures) VC firm **1** round [NP-Hard Ventures](https://millionrounds.com/fund/np-hard-ventures) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=isembard). ## Also claim to have backed them These 4 firms list Isembard 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. [Amplifier](https://millionrounds.com/fund/amplifier) VC firm Per its own site [Foreword Ventures](https://millionrounds.com/fund/foreword-fund) VC firm Per its own site [Basis](https://millionrounds.com/fund/basis) VC firm Per its own site [Foreword VC](https://millionrounds.com/fund/foreword-vc) Investor Per its own site ## Quick answers about Isembard ### Who invested in Isembard? Isembard's investors include Notion Capital, Union Square Ventures, IQ Capital, Tamarack Global and CIV, and 11 more on record. Union Square Ventures led its latest round. ### How much has Isembard raised? Isembard has raised $59M across 2 rounds since 2025. ### When did Isembard last raise? Isembard's most recent round was a Series A of $50M in Mar 2026, led by Union Square Ventures. ### What was Isembard's biggest round? Its most recent round, $50M in Mar 2026, is also its largest on record. ### Who backed Isembard first? Isembard's first round on record, in Apr 2025, was backed by Notion Capital, 201 Ventures and Andreas Klinger and 6 others. ### What stage is Isembard at? Isembard's latest named round is a Series A, in Mar 2026. ### Where is Isembard based? Isembard is based in the United Kingdom. ### Who led Isembard's rounds? Notion Capital led the Seed in 2025; Union Square Ventures led the Series A in 2026. ## Companies like Isembard In the same sector, and raised in the last eighteen months. [**Atmospheric AI** $20M · Nov 2026](https://millionrounds.com/company/atmospheric-ai)[**Crediflow AI** $2.0M · Nov 2026](https://millionrounds.com/company/crediflow-ai)[**Lazarus AI** $43M · Nov 2026](https://millionrounds.com/company/lazarus-ai)[**Thistle** $10M · Nov 2026](https://millionrounds.com/company/thistle)[**Fractile** $960M · Oct 2026](https://millionrounds.com/company/fractile)[**Nexgen Cloud** $179M · Oct 2026](https://millionrounds.com/company/nexgen-cloud) ## 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