London AI chip startup Fractile just closed one of the largest private semiconductor rounds in European history — and you'd only know it if you read British corporate filings.
Nine share-allotment returns lodged at Companies House on October 15 and 28 show the company allocated £577 million in Series C preferred shares between September 9 and October 23, according to Tech Funding News. At roughly $1.34 to the pound, that's around $774 million — about 3.5 times the $220 million Series B Fractile raised in May. The company itself has said nothing: no announcement, no blog post, no statement on how it plans to use the money.
The filings tell a subtler story than a round number. The shares were sold in three tranches at three prices — Series C-1 at £801.54, C-2 at £707.25, and C-3 at £1,452.35 — suggesting the round priced up sharply mid-flight, with most of the money (£392.2 million) landing at the top price. Back in August, Fractile was reportedly in talks to raise $600 million at a $6.5 billion pre-money valuation; the register total came in about $174 million higher. The market moved the valuation while the paperwork was being filed.
Fractile, founded in 2022 by Oxford PhD Walter Goodwin and Yuhang Song, builds chips for AI inference — the part where a trained model answers your prompt. Instead of shuttling data between separate memory and processor chips, its architecture keeps data next to the transistors doing the calculations. The company's claim: long AI workloads that crawl at 40 tokens per second for a month could run at 1,200 tokens per second and finish in a day. Those numbers are the company's own and untested.
The reason anyone is paying before silicon exists: Bloomberg reported that Anthropic agreed to an initial $250 million chip order, with both sides interested in expanding it. Deployment isn't expected until 2027.
Context makes the bet legible. Nvidia licensed Groq's inference technology last December and hired most of its engineers in a deal worth tens of billions. Cerebras went public above $56 billion in May. Etched raised $700 million at a $21 billion valuation in August with Jane Street as its first paying customer. Investors have decided that the AI buildout's next chokepoint is inference — serving models cheaply and fast — and they're paying up for any credible shot at it.
But here's the honest framing: Fractile has no shipped chip, no disclosed revenue, and a deployment date that is a promise, not a product. The Anthropic order is an initial agreement, not a contract etched in stone. Until 2027, the valuation reflects scarcity — one of the few credible Nvidia alternatives in a market starved of them — plus the company's technology claims. The next funding round will reveal which of those two things investors were actually excited about.
— via Tech Funding News