Fractile raises $720 million at over £5 billion valuation

Fractile, a London and Bristol startup building AI inference chips, has raised a $720 million Series C at a valuation of over £5 billion, with backing from the UK government's Sovereign AI fund and the British Business Bank.

Why it matters: The round makes Fractile one of the best-funded challengers in purpose-built AI inference hardware, and it is a direct state-backed bet on keeping a British chip designer at scale in the UK.

Data as of UK Government release of November 11, 2026, read in full on gov.uk (round worth over £500 million, valuation over £5 billion, investor list as stated by the government), and TechCrunch reporting of the same day, read in full, for the $720 million Series C size and the company's plan to ship its first chips and systems next year. Developing item.

Fractile, an AI chip startup based in London and Bristol, has secured backing from the UK Government’s Sovereign AI Venture Fund and the British Business Bank as part of a funding round worth over £500 million that values the company at over £5 billion, the government announced on Wednesday. TechCrunch put the Series C at $720 million and reported Thrive Capital, Founders Fund, Lightspeed Venture Partners and Redpoint among the leads, while the government’s own investor list also names CapitalG, Lightspeed and Redpoint alongside the two state backers.

Fractile builds full-stack inference hardware, pairing chips that stack DRAM directly on the processor with its own machine learning compiler, a design aimed at cutting the cost and memory bottleneck of running large models in production. Chief executive Walter Goodwin said the funding will let the company ship its first chips and systems next year, and ministers framed the investment as a sovereign-capability bet on keeping British chip design, and the jobs around an expanded Bristol presence, in the UK.

Fractile raises $720 million at over £5 billion valuation

Sources