These 6 London Startups Raised the Most Capital in March 2026

Armed with some data from our friends at CrunchBase, I broke down the largest London startup funding rounds during the month of March. I have included some additional information as well such as industry, founding year, brief funding description, founders, total funding raised, to further the analysis for the state of venture capital in London. For the purposes of this analysis, only equity funding rounds were considered.

6. Origin £22.4M

Round: Series A
Description: Origin provides employee benefits management software that helps HR teams manage and optimize global benefits. Founded by Chris Bruce and Pete Craghill in 2024, Origin has now raised a total of $51.0M in total equity funding and is backed by Notion Capital, Acadian Ventures, Felix Capital, HSBC Innovation Banking, and Paul Daugherty.
Investors in the round: Acadian Ventures, Felix Capital, Notion Capital
Industry: Artificial Intelligence (AI), B2B, Employee Benefits, Enterprise Software, Human Resources, SaaS
Founders: Chris Bruce, Pete Craghill
Founding year: 2024
Total equity funding raised: $51.0M

5. Isembard $50.0M

Round: Series A
Description: Isembard is a distributed manufacturing company that uses software to automate production of high-precision components for critical industries. Founded by Alexander Fitzgerald in 2024, Isembard has now raised a total of $59.0M in total equity funding and is backed by Union Square Ventures, IQ Capital, CIV, Notion Capital, and Tamarack Global.
Investors in the round: Alex Bouaziz, Andrei Danescu, CIV, IQ Capital, Matt Briers, Notion Capital, Tamarack Global, Union Square Ventures
Industry: Industrial, Industrial Manufacturing, Manufacturing, Mechanical Engineering
Founders: Alexander Fitzgerald
Founding year: 2024
Total equity funding raised: $59.0M

4. R1 Therapeutics $77.5M

Round: Series A
Description: R1 Therapeutics is a clinical-stage biopharmaceutical company developing first-in-class therapies for patients with kidney disease. Founded by Krishna Polu and L. Mary Smith in 2026, R1 Therapeutics has now raised a total of $77.5M in total equity funding and is backed by F-Prime, Curie.Bio, Abingworth, U.S. Renal Care, and DaVita Venture Group.
Investors in the round: Abingworth, Curie.Bio, DaVita Venture Group, F-Prime, SymBiosis, U.S. Renal Care
Industry: Biotechnology, Health Care, Medical, Therapeutics
Founders: Krishna Polu, L. Mary Smith
Founding year: 2026
Total equity funding raised: $77.5M

3. Granola $125.0M

Round: Series C
Description: Granola provides an AI notepad that turns meetings and conversations into searchable notes and summaries. Founded by Christopher Pedregal and Sam Stephenson in 2023, Granola has now raised a total of $192.3M in total equity funding and is backed by Lightspeed Venture Partners, Index Ventures, Kleiner Perkins, Spark Capital, and NFDG Ventures.
Investors in the round: Index Ventures, Kleiner Perkins, Lightspeed Venture Partners, NFDG Ventures, Spark Capital
Industry: Artificial Intelligence (AI), Information Technology, Meeting Software, SaaS, Software
Founders: Christopher Pedregal, Sam Stephenson
Founding year: 2023
Total equity funding raised: $192.3M

2. 9fin $170.0M

Round: Series C
Description: 9fin provides an AI-powered debt market intelligence platform with news, data, and analytics for credit teams. Founded by Huss EL-Sheikh and Steven Hunter in 2016, 9fin has now raised a total of $257.2M in total equity funding and is backed by 500 Global, HarbourVest Partners, Spark Capital, Seedcamp, and The Carlyle Group.
Investors in the round: CPP Investments, HarbourVest Partners, Highland Europe, redalpine, Seedcamp, Spark Capital
Industry: Analytics, Artificial Intelligence (AI), Financial Services, FinTech, Machine Learning
Founders: Huss EL-Sheikh, Steven Hunter
Founding year: 2016
Total equity funding raised: $257.2M

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1. Nscale $2.0B

Round: Series C
Description: Nscale provides AI infrastructure, including data centers and GPU cloud services, for training and running AI models. Founded by Josh Payne in 2024, Nscale has now raised a total of $3.7B in total equity funding and is backed by Blue Owl, NVIDIA, Citadel, Lenovo, and Point72.
Investors in the round: 8090 Industries, Aker, Astra Capital Management, Citadel, Dell, Jane Street Capital, Lenovo, Linden Advisors, Nokia, NVIDIA, Point72
Industry: AI Infrastructure, Artificial Intelligence (AI), Data Center, GPU, Information Technology, Internet, Telecommunications
Founders: Josh Payne
Founding year: 2024
Total equity funding raised: $3.7B