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Sovereign AI and British Business Bank invest in British firm developing the next generation of AI hardware

Reported by Gov
Nov 11, 2026· 3 min read
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Key Takeaways
  • • UK Government's Sovereign AI Venture Fund and the British Business Bank backed Fractile, a Bristol and London-based frontier AI hardware firm, as part of a Series C round worth more than £500 million.
  • • Fractile's round values the company at over £5 billion, with participation from CapitalG, Lightspeed and Redpoint alongside the public investors.
  • • The investment is positioned by the government as a step toward reducing reliance on overseas chip supply chains and keeping AI hardware jobs and economic value in the UK.
  • • The announcement follows the Budget, which confirmed £140 million in further backing for Sovereign AI, an additional £60 million for the Fund's investments, and £80 million for its R&D Procurement Scheme.
  • • The British Business Bank's investment capacity was expanded by £5 billion to £30.6 billion, with the package expected to support more than 24,600 existing jobs and create more than 15,800 new jobs.
Summary
The UK Government's Sovereign AI Venture Fund and the British Business Bank have invested in Fractile, a Bristol and London-based startup developing advanced AI chips, as part of a funding round worth more than £500 million, according to a GOV.UK announcement made on Wednesday 11 November. The round values Fractile at over £5 billion. Besides the public backers, the Series C round includes CapitalG, Lightspeed and Redpoint.

Fractile is redesigning the hardware on which AI runs with the aim of making it faster, more energy efficient and less costly. The company takes a full-stack approach, covering chips, software and fundamental machine learning research. The government presents the investment as part of its effort to strengthen sovereign capabilities in critical technologies and reduce dependence on fragile overseas supply chains.

The announcement was framed by government officials as a response to the historical pattern in which British computing breakthroughs, from Alan Turing's work to Arm in Cambridge, have generated commercial returns abroad. AI Minister Kanishka Narayan said Britain needs to build more of the technology that powers AI, while Business Secretary Jonathan Reynolds said Fractile plans to expand its presence in Bristol. Sovereign AI Investment Partner Joséphine Kant and Leandros Kalisperas, Chief Investment Officer of the British Business Bank, also commented on the company's technical approach and founder Walter's team.

The investment comes a fortnight after the Budget, which confirmed £140 million in further backing for Sovereign AI, an extra £60 million for the Fund's investments and £80 million for the R&D Procurement Scheme. The Budget also expanded Sovereign AI into Physical and Industrial AI, and the government cited up to £2 billion of compute infrastructure investment under the AI Compute Roadmap. The British Business Bank's investment capacity rose by £5 billion to £30.6 billion.

According to the notes to editors, Sovereign AI typically makes equity investments of around £1-10 million at early and growth stages, and does not disclose specific investment figures for individual companies. The Fund's stated criteria require startups to have a meaningful UK presence through founders, leadership, headquarters or a large share of talent.

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Sources

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Gov Sovereign AI and British Business Bank invest in British firm developing the next generation of AI hardware