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# UK's Sovereign AI Fund joins Fractile's chip round at a reported $6.5B valuation
- URL: https://venture-block.com/fractile-series-c-sovereign-ai-fund-6-5b-valuation/
- Published: 2026-11-02T07:13:19.000Z
- Updated: 2026-11-02T07:13:19.000Z
- Description: The UK government's Sovereign AI fund is joining a round for London chip startup Fractile, The Telegraph reported. Companies House filings show the Series C already brought in £577 million across three share classes.
- Author: Venture Block
- Tags: Funding, Science

The UK government's Sovereign AI Fund has joined the latest funding round of Fractile, a London startup that designs chips for running AI models, in a deal expected to value the company at about $6.5 billion, [The Telegraph reported on 1 November](https://www.telegraph.co.uk/business/2026/11/01/labour-ai-fund-joins-deal-for-anthropic-backed-chipmaker/?ref=venture-block.com). The newspaper said the round should raise around $700 million and could be announced as soon as next week. Fractile and the government declined to comment on the terms, [according to EuropeanTechOnHeels](https://europeantechonheels.com/uk-sovereign-ai-fund-fractile-ai-chip-stake/?ref=venture-block.com).

If the figure holds, Fractile's value will have risen roughly sixfold since spring. The company was worth about $1 billion earlier this year, The Telegraph said, around the time it closed a [$220 million Series B](https://www.wsj.com/tech/ai/chips-startup-fractile-raises-220-million-to-speed-up-ai-queries-c8681944?ref=venture-block.com) in May. It has not yet shipped a production chip.

## What the filings already show

Fractile has not announced the round, but much of the money appears to be in the bank. [Sifted first reported on 29 October](https://sifted.eu/articles/exclusive-fractile-series-c?ref=venture-block.com) that UK Companies House filings showed about £540 million of new Series C funding. A fuller count by [Tech Funding News](https://techfundingnews.com/fractile-577m-series-c-nvidia-ai-chips/?ref=venture-block.com) of nine share allotment returns, filed on 15 and 28 October, puts the total at £577 million, or about $774 million at $1.34 to the pound, allotted between 9 September and 23 October and paid in cash.

The filings split the round into three share classes at very different prices:

- Series C-1: £147.8 million at £801.54 a share
- Series C-2: £37.4 million at £707.25 a share
- Series C-3: £392.2 million at £1,452.35 a share

The top C-3 price is about 5.2 times the £278.37 a share that Series B investors paid in May, according to an [analysis of the filings](https://europeantechonheels.com/uk-sovereign-ai-fund-fractile-ai-chip-stake/?ref=venture-block.com) by The Cap Table. The two cheaper classes mean some investors came in on much better terms than others. That matches what [Bloomberg reported in August](https://news.bloomberglaw.com/artificial-intelligence/chip-firm-fractile-seeks-6-5-billion-value-after-anthropic-deal?ref=venture-block.com), when it said Fractile was in advanced talks to raise about $600 million at a $6.5 billion pre-money valuation, a sum that included some money invested at a lower price. The filings do not name investors, so it is not clear which class the government fund bought. The Telegraph said the fund came in at a slightly lower valuation than the final $6.5 billion.

Lightspeed Venture Partners and Redpoint Ventures are leading the round, with Thrive Capital also investing, The Telegraph reported. Bloomberg had named Lightspeed and Redpoint as co-leads in August. Founders Fund, which [co-led the Series B](https://www.accel.com/news/fractile-the-future-of-ai-inference?ref=venture-block.com) with Accel and Factorial Funds, is an earlier backer.

## Why investors are paying ahead of the silicon

Fractile builds chips for inference, the work a trained model does each time it answers a prompt. In conventional systems, data shuttles between separate memory and processor chips. Fractile's design keeps data next to the transistors that do the arithmetic, [Tech Funding News explained](https://techfundingnews.com/fractile-577m-series-c-nvidia-ai-chips/?ref=venture-block.com), which the company says cuts the time and energy spent moving data. The company's stated goal is output of 1,200 tokens per second on long AI workloads that it says run at about 40 tokens per second today, which would shrink a month-long job to roughly a day. Those are targets, not measured results from shipping hardware.

The commercial case rests largely on one customer. Bloomberg reported that Fractile reached an initial agreement to sell Anthropic about $250 million of chips, with both sides interested in expanding it. The hardware is not expected until 2027, which is also when Fractile expects to deploy in data centers. Anthropic itself [filed for an IPO](https://venture-block.com/anthropic-s1-ipo-nasdaq-ant-revenue/) last week.

Fractile is one of several inference-chip startups raising at speed. South Korea's FuriosaAI [raised $620 million at a $2.9 billion valuation](https://venture-block.com/furiosaai-620m-series-d-rngd-inference-chips/) last week to scale up its RNGD chips, and fellow London company OLIX [raised $312 million at a $3.3 billion valuation](https://olix.com/news/company-raises-series-b?ref=venture-block.com) in August.

## A small fund's big bet

The Sovereign AI Fund was set up this year with £500 million of public money to back UK-based AI companies, and The Telegraph said it typically invests between £1 million and £10 million per deal. In August it took a stake in OLIX, its [fifth equity investment](https://www.gov.uk/government/news/sovereign-ai-invests-in-uk-startup-reinventing-ai-chips?ref=venture-block.com). "Countries that build chips will build leverage," AI minister Kanishka Narayan said at the time.

The size of its Fractile stake has not been disclosed. For the government, the argument is keeping a strategic chip designer anchored in Britain while US funds supply most of the capital. Fractile was founded in 2022 by Oxford robotics researcher Walter Goodwin with co-founder Yuhang Song, and it emerged from stealth in July 2024 with a [$15 million seed round](https://www.fractile.ai/news/fractile-raises-220m-to-build-the-next-generation-of-inference-hardware/?ref=venture-block.com). In February it pledged £100 million over three years to expand in the UK, including a hardware engineering facility in Bristol, according to Tech Funding News.

Fractile has not said how it will spend the Series C money. Its first real test comes in 2027, when its chips for Anthropic are expected to be ready.