Major American venture capital firms Lightspeed and Alphabet's CapitalG have joined a £500m-plus funding round for Fractile, a UK-based chip designer focused on artificial intelligence workloads. The financing values the startup at more than £5bn, according to an announcement from the UK government.

Operating from offices in Bristol and London, Fractile develops processors optimised for AI inference—the computational task of executing trained AI models. The company's approach differs fundamentally from conventional chip design: rather than moving data back and forth between processing cores and separate memory banks, Fractile's architecture embeds memory directly onto the chip itself. According to the company, this design choice enables large language models to run up to one hundred times faster than on existing hardware while reducing operational expenses by 90 per cent. The startup expects its specialised processors to be ready for deployment in data centres during the following year.

Fractile was established in 2022 by Walter Goodwin, a researcher with a doctorate from Oxford University. The Series C round drew participation from a diverse investor base spanning both private and public institutions.

Investor lineup and funding trajectory

Leading the Series C were Thrive Capital, Peter Thiel's Founders Fund, Lightspeed, and Redpoint. Additional backers included the UK's Sovereign AI fund, the British Business Bank, Shopify, Balderton, Dragoneer and Blackrock. The round totalled approximately £540m.

This latest capital injection follows a Series B round announced in May of this year, which raised $220m and valued Fractile at roughly £820m. That earlier round was led by Accel, Factorial Funds, and Founders Fund.

Strategic importance for UK technology sovereignty

The investment reflects broader UK government priorities around establishing domestic leadership in artificial intelligence infrastructure and reducing reliance on international supply chains for critical technologies.

AI minister Kanishka Narayan commented on the significance of the funding: "For too long, Britain has produced some of the world's best scientific ideas, only to see too much of the technology, industry and wealth they create built elsewhere. We are determined to change that. If AI is going to serve the British people, strengthen our public services and create good jobs across the country, Britain needs to build more of the technology that powers it.

Narayan added: "Fractile represents the very best of British ambition, bringing together world-class chip design, engineering and AI expertise to develop faster, cheaper and more energy-efficient hardware."

Source: Tech.eu