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Funding · Aug 20, 2026, 06:32 PM · 2 sources

Fractile closes $600M Series B at $6.5B valuation, led by Lightspeed & Redpoint

UK AI chip startup Fractile, founded in 2022 by Walter Goodwin, is in advanced talks to raise approximately $600 million at a $6.5 billion valuation, according to Bloomberg. Lightspeed Venture Partners and Redpoint are reportedly set to co-lead the round, which would value Fractile more than six times higher than its May 2026 Series A, when the company raised $220 million at roughly $1 billion.

Fractile develops specialized chips for AI inference, competing in a crowded field of silicon startups aiming to challenge NVIDIA's dominance. The company has already secured a supply deal with US AI lab Anthropic and counts Peter Thiel's Founders Fund, Accel, and Nato Innovation Fund among early backers. The UK government's recent £1.1 billion AI hardware plan directly supports companies like Fractile as part of a broader push to build sovereign semiconductor capacity.

The round reflects investor appetite for European AI chip alternatives despite a challenging public market. Comparable UK chip startup Olix tripled its valuation to $3.3 billion earlier this month, while Dutch player Axelera raised $250 million. For architects, Fractile's Anthropic partnership signals confidence in non-NVIDIA silicon for inference workloads and underscores the shift toward specialized, energy-efficient architectures tailored to AI's token-generation bottlenecks.

Sources

Everything this brief rests on
  1. 01 Primary source sifted.eu
  2. 02 Sifted: UK chip startup Fractile in talks to raise at $6.5bn valuation sifted.eu