Key Takeaways
- • Fractile, a London AI inference chip startup, closed a $720 million Series C led by Thrive Capital, Founders Fund, Lightspeed and Redpoint, lifting its valuation to $7 billion from roughly $1 billion in May.
- • The company has not shipped a production chip or disclosed revenue; its first commercial chip is due in 2027.
- • Fractile's architecture stacks DRAM directly onto logic to deliver higher memory bandwidth than HBM and more capacity than on-die SRAM.
- • Companies House filings showed £577 million (about $774 million) in Series C shares issued between September 9 and October 23, above the announced $720 million figure.
- • Fractile sits between Olix ($3.3 billion valuation) and Etched ($21 billion valuation) among AI chip rivals, with the least silicon shipped of the three.
Summary
Fractile, a London-based chip startup founded in 2022 by Walter Goodwin and Yuhang Song, has closed a $720 million Series C round that values the company at $7 billion, according to the report. The round was co-led by Thrive Capital, Founders Fund, Lightspeed and Redpoint. In May, Fractile was valued at around $1 billion with $220 million raised in a Series B co-led by Founders Fund, Accel and Factorial Funds. Fractile has not confirmed the valuation or disclosed how it will spend the new capital, beyond hiring in London, Bristol, Palo Alto and Taipei.
The company designs chips for AI inference, where it argues output speed is a key constraint on advanced AI systems. Its approach stacks DRAM directly on top of logic, aiming for higher memory bandwidth than HBM and greater capacity than SRAM. Memory bandwidth largely determines how quickly a chip can access model data and therefore its response time. The technology has not yet been proven in production, and Fractile has generated no disclosed revenue. Bloomberg reported in August that Anthropic agreed to an initial order of around $250 million in chips, with hardware due in 2027.
New investors in the Series C include Dragoneer, DST Global, Elad Gil, BlackRock, T. Rowe, CapitalG, Georgian, Shopify, Balderton, the British Business Bank and others. Accel, Conviction, Factorial, Felicis and Kindred are returning backers. Companies House filings reported in October showed £577 million (about $774 million) in Series C shares issued between September 9 and October 23, which exceeds the announced $720 million. In February, Fractile had around 80 staff and had committed £100 million over three years to UK expansion, including a hardware facility in Bristol.
Rivals have also raised large sums. Etched raised $700 million at a $21 billion valuation led by Jane Street, and Olix raised $312 million at a $3.3 billion valuation. Cerebras went public in May at a valuation above $56 billion, and Nvidia licensed Groq's technology in December 2025. Fractile now has the capital to build its product, but it still must demonstrate that stacked DRAM works at scale and that customers will adopt its solution when it ships in 2027.
The company designs chips for AI inference, where it argues output speed is a key constraint on advanced AI systems. Its approach stacks DRAM directly on top of logic, aiming for higher memory bandwidth than HBM and greater capacity than SRAM. Memory bandwidth largely determines how quickly a chip can access model data and therefore its response time. The technology has not yet been proven in production, and Fractile has generated no disclosed revenue. Bloomberg reported in August that Anthropic agreed to an initial order of around $250 million in chips, with hardware due in 2027.
New investors in the Series C include Dragoneer, DST Global, Elad Gil, BlackRock, T. Rowe, CapitalG, Georgian, Shopify, Balderton, the British Business Bank and others. Accel, Conviction, Factorial, Felicis and Kindred are returning backers. Companies House filings reported in October showed £577 million (about $774 million) in Series C shares issued between September 9 and October 23, which exceeds the announced $720 million. In February, Fractile had around 80 staff and had committed £100 million over three years to UK expansion, including a hardware facility in Bristol.
Rivals have also raised large sums. Etched raised $700 million at a $21 billion valuation led by Jane Street, and Olix raised $312 million at a $3.3 billion valuation. Cerebras went public in May at a valuation above $56 billion, and Nvidia licensed Groq's technology in December 2025. Fractile now has the capital to build its product, but it still must demonstrate that stacked DRAM works at scale and that customers will adopt its solution when it ships in 2027.
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