22OCT

AI takes record 44% of UK equity market

2 min read

16:30UTC

AI companies took a record 44% of UK smaller-business equity value in 2025, even as the total market shrank 4% to £12.3bn.

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Key takeaway

Record AI concentration is hollowing out the UK's seed and spinout funding beneath a shrinking total market.

AI companies took a record 44% of UK smaller-business equity value in 2025, from a market that shrank 4% to £12.3bn, the British Business Bank (BBB), the UK government's development bank, reported on 2 July 2026⁠¹. AI investment rose 48% over the year while every other sector contracted in both share and cash. The top 10 fundraisings absorbed 23% of all investment, the highest concentration since 2020, and seed deals fell 27%.

The BBB's chief investment officer, Leandros Kalisperas, said the concentration into AI reflects both the scale of the opportunity and the challenges across the wider market⁠². The tracker measures the value of equity raised, not the number of companies funded, so a record share can sit on top of fewer names taking larger cheques.

A 48% rise in AI money against a 4% fall in the total meant growth-stage rounds pulled capital up and out of everything beneath them. The same barbell shape carried PhysicsX to a $300m round at a $2.4bn valuation in June. Fewer companies, larger cheques, one sector.

Deep Analysis

In plain English

The British Business Bank, the government's own economic development bank, publishes an annual scorecard on how much money young British companies raise by selling shares, known as equity funding. Its 2025 edition found AI companies grabbed a record 44p of every pound invested, even though the total pot shrank 4% to £12.3bn. That matters because seed rounds, the small first cheques that get a brand-new company off the ground, fell 27% over the same year. Money is increasingly flowing to already-large AI companies rather than to first-time founders starting from nothing.

Deep Analysis

Root Causes

AI-stage companies need far larger cheques than software-only peers at the same maturity, because training and inference compute costs push burn rates several times higher for the same set of milestones. That mechanical cost structure, not investor taste alone, pulls a disproportionate share of total capital toward AI even when deal counts stay flat.

The 27% fall in seed deals compounds the effect from the other end: removing smaller, cheaper first cheques shrinks the denominator, so a thinner bottom of the market mechanically inflates AI's percentage share of what remains.

What could happen next?

Risk
A sustained funding squeeze on non-AI seed-stage founders could thin the pipeline of future UK scale-ups outside artificial intelligence.
Consequence
Institutional and pension-linked funds carrying UK venture exposure are increasingly betting on one sector's valuations holding up.

Source Landscape

This story draws on neutral-leaning sources

Primary parallel: The UK's 2000-2001 dot-com contraction saw internet-sector deals halve while telecoms and infrastructure funding held broadly flat, the same divergence visible now between AI's rising 44% share and the market's 4% overall decline: one narrative concentrating capital even as the wider base shrinks.

Counter-parallel: The 2015-2018 UK fintech run shows the opposite path: a single sector's dominance coincided with a growing overall market, not a shrinking one, so concentration alone does not prove the base is weakening.

Consensus view: Beauhurst's deal-tracking team reads the 44% AI share as a round-size effect rather than a demand shift: AI's share of deal count barely moved on 2024, but its cheques got far larger, the same barbell pattern PhysicsX's $2.4bn Series C showed in June.

Counter-view: Onward's enterprise policy team argues the concentration is a genuine reallocation, not statistical noise, because UK model and infrastructure firms only became investable at scale this year, pulling in capital that previously spread across fintech and consumer software.

Key tension: Whether the 44% figure reverts once this year's handful of mega-rounds cycle out of the count, or marks a lasting narrowing of what British venture capital is prepared to fund.

Sources:British Business Bank

Mentions:Beauhurst →Onward →British Business Bank →Leandros Kalisperas →Small Business Equity Tracker →PhysicsX →CuspAI →

First Reported In

Update #10 · AI takes record 44% as UK equity shrinks

British Business Bank· 4 Jul 2026

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Causes and effects

Caused by

PhysicsX hits $2.4bn on Temasek cash

PhysicsX's $300m Series C exemplified the AI-concentration barbell the BBB tracker now confirms nationally.

Occurred 8 Jun 2026

Read story →

UKRI confirms 58% cut to STFC labs

The STFC cuts extend the market-narrowing pattern the Bank's 2 July tracker showed in AI's record equity share.

Occurred 9 Jul 2026

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This Event

AI takes record 44% of UK equity market

AI megarounds are draining capital from the seed and spinout tiers, the first hard 2025 dataset to show it.

Led to

Dealroom projects $34.2bn for UK tech

The 44% AI equity-share record set the concentration pattern Dealroom's week-on-week figures now repeat.

Occurred 23 Jul 2026

Read story →

UK chip exits hit six, a five-year low

AI's record 44% equity share last year sits behind this year's uneven semiconductor and robotics figures.

Occurred 24 Aug 2026

Read story →

Ten raises took 75.2% of life sciences

The life-sciences concentration mirrors the British Business Bank's finding that AI took 44% of smaller-business equity value last year.

Occurred 10 Sept 2026

Read story →

Different Perspectives

Abu Dhabi Investment Council

The Abu Dhabi Investment Council holds notes in Nscale's $3.36bn pre-IPO raise, beside Third Point, Apollo, Citadel and Nvidia. No British institution appears among the named holders of notes that convert into shares at Nscale's New York listing.

CDP Venture Capital

CDP Venture Capital, the venture arm of Italy's state lender, led TrueLayer's £20.4m round to expand Pay by Bank across Europe. A foreign state investor set the terms on a London fintech round in the same month the British Business Bank mostly followed.

EDBI

Singapore's state investor EDBI joined Universal Quantum's Series A of more than $100m, and the Sussex company is opening its first research centre outside Europe in Singapore. British state money is absent from the largest Series A by a UK quantum company.

Forbion

Forbion co-led OMass Therapeutics' $310m Series C with Bain Capital Life Sciences and Novo Holdings, while the British Business Bank and Syncona followed. The terms of the Oxford spinout's round were set by investors from three countries, none of them Britain.

British Business Bank

The Bank committed £180m to six AI funds on 15 October with no UK-deployment condition, yet led the first close of Microbiotica's £36m Series C. That lead, with Airtel Money choosing London for its £5.3bn debut, is the evidence that British money and markets still set some terms.

Stryker Corporation

Stryker called its roughly $400m CMR Surgical deal its entry into soft-tissue robotics, taking US sales rights for Versius, a board seat and an exclusive option over 100% of the company. The option lets Stryker choose whether and when a Cambridge robot maker becomes part of an American group.

Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Editorial standards.