Fractile's £577.4 Million Series C Is Filed in Three Share Classes at Three Prices, and Unannounced

Fractile, the London inference-chip startup, has been paid £577.4 million for new Series C shares between September 9 and October 23, according to Companies House filings reported by Tech Funding News on October 30, and it has not formally announced the round. That makes the filings the best evidence of the amount, and they point to a valuation tier that no company statement confirms.

The figure is the sum of three share classes, each priced differently. The arithmetic is checkable: £147.8 million plus £37.4 million plus £392.2 million is £577.4 million, which matches the £577 million Dealroom and BusinessCloud also give.

Class	Price per share	Cash paid in
C-1	£801.54	£147.8 million
C-2	£707.25	£37.4 million
C-3	£1,452.35	£392.2 million

Three prices inside one round

The C-3 shares cost 1.81 times the C-1 price and 2.05 times the C-2 price, and C-3 accounts for 68% of the cash. A round that clears at more than one price usually means investors came in at different times or on different terms. The filings do not say which. Dealroom, summarising a Telegraph report from November 1, says the UK Sovereign AI Fund joined at a slightly lower valuation than the final $6.5 billion. That is consistent with an earlier, cheaper class, though neither source ties the fund to C-1 or C-2.

The fund typically writes £1 million to £10 million cheques, per the same account, so it would be at most 1.7% of the allotments. Its stake size is undisclosed. The Telegraph report also says Lightspeed and Redpoint lead, with Thrive Capital investing. Tech Funding News names no Series C investors and Fractile and the government declined to comment, so the lead names rest on one secondary account.

Announced versus closed

A Sifted article in our lead sheet for November 13 is headlined "Fractile confirms £540m raise first revealed by Sifted". We could not open it, so we do not know what was confirmed. The gap to the filings is £37.4 million, which is exactly the size of the C-2 class. That may be coincidence or may be a definitional difference, such as counting only some classes. We found no explanation, and it is the first thing a reader should ask the company.

What is not in dispute is that the cash is paid. Tech Funding News says all shares were paid in cash, and the filings are dated October 15 and 28. That is stronger evidence than a term sheet, though it is not a valuation statement.

What $6.5 billion implies

Bloomberg reported in August that Fractile was in talks to raise $600 million at a $6.5 billion pre-money valuation. Tech Funding News converts £577.4 million to about $774 million at roughly $1.34 per pound. If $6.5 billion was pre-money and the full $774 million went in at that value, post-money is about $7.27 billion and the new money owns about 10.6%. Dealroom puts the prior valuation at roughly $1 billion after May's $220 million round, led by Accel, Factorial Funds and Founders Fund, per Evertiq.

The value rests on a small base. Bloomberg reported an initial agreement for Anthropic to buy about $250 million of Fractile chips, described by unnamed sources as only an initial agreement. Tech Funding News says the company expects to deploy its chips in data centres in 2027. So the revenue behind a roughly $7 billion valuation is a conditional order against hardware that has not shipped in volume. Nscale's listing plan, priced at about 124 times annualised revenue, shows the same investor logic applied to infrastructure with actual sales.

The pitch

Founder Walter Goodwin wrote in a summer blog post, quoted by BusinessCloud: "Fractile is seeking to increase the clock speed of global progress, one chip at a time." The May announcement named the bottleneck as "memory bandwidth that has failed to scale on current architectures". That is the gap Fractile is selling against, and the incumbent in it is Nvidia, which named Colette Kress interim chief executive after Jensen Huang resigned.

What to watch next

Fractile has to file a confirmation statement and accounts that would show the final share count, and a formal announcement would settle the £540 million versus £577.4 million question. The first dated test of the chips is the 2027 data-centre deployment.