UK start-ups raised a record $17bn (£12.7bn) in the first half of 2026, double the amount raised in the same period last year and the strongest opening to any year since 2022, according to new figures from Dealroom and HSBC Innovation Banking.

Yet only 16 per cent of large funding rounds involved domestic investors, a statistic that should give anyone cheering the headline number pause.

Britain is, on this evidence, still comfortably Europe’s start-up capital. The UK attracted 39 per cent of all European venture capital investment in the period, more than France, Germany, Sweden and Switzerland combined.

Artificial intelligence did most of the heavy lifting. AI companies raised a record $12.6bn (£9.4bn), nearly three quarters of everything invested, and took 19 of the 28 megarounds of $100m (£75m) or more completed in the half. All four rounds above $1bn (£750m) went to AI firms, the largest being the $2.1bn (£1.6bn) raised by Isomorphic Labs.

“The first half of 2026 demonstrates the continued strength of the UK’s innovation ecosystem, with record levels of investment reflecting growing confidence from both domestic and international investors,” said Emily Turner, chief executive of HSBC Innovation Banking UK.

“What is particularly encouraging is how AI is increasingly being applied across sectors. We’re seeing it create new opportunities in sectors from life sciences and deep tech to enterprise software, while helping companies compete on a global stage.”

Encouraging, certainly. But the fine print tells a more awkward story about who is writing the cheques. With domestic investors involved in just 16 per cent of the biggest rounds, the returns from Britain’s most successful companies will overwhelmingly flow to funds in San Francisco, New York and the Gulf rather than to British pensions and portfolios. It is a familiar complaint: veteran investors have long warned that only 20 per cent of the capital backing UK scale-ups is domestic, leaving 80 per cent of the upside to overseas backers.

There is a second wrinkle for business owners reading past the record total. Capital is piling up at the two ends of the market, into early-stage bets and a handful of enormous late-stage rounds, while established growth companies in the middle face a tougher route to finance. Late-stage deals took 68 per cent of all capital raised in the half, up from 42 per cent a year earlier. Separate figures published this week showed the same pattern across UK tech: funding nearly doubled, but the money went to fewer companies.

For the typical SME seeking a £2m to £10m growth round, in other words, the boom may feel oddly distant. A record year in aggregate is proving demanding in person, and firms without AI credentials or unicorn ambitions will find investors choosier than the headlines suggest.

Policymakers are not blind to the gap. The British Business Bank has more than doubled its direct equity investing in nine months, explicitly to signal to UK institutions that they should follow. And under the Mansion House Accord, seventeen of Britain’s biggest workplace pension providers have pledged to put 10 per cent of their portfolios into private assets by 2030, with at least half of that ringfenced for the UK.

Until that money arrives, the first half of 2026 stands as a curious sort of triumph: proof that Britain can build companies the whole world wants to own, and a reminder that Britain itself remains reluctant to buy.