The London Stock Exchange has suffered yet another bruising blow to its tech ambitions. Artificial intelligence start-up Anthropic has confirmed its intention to list in the United States, snubbing the UK capital in favour of New York. For those of us who track capital flows like a hawk watches a field mouse, this is hardly a surprise. London’s equity markets have become the financial equivalent of a leaking bucket when it comes to high-growth technology listings. The pattern is now tediously familiar. Arm Holdings, the chip designer, opted for Nasdaq last year. Cambridge-based feature phone pioneer Nothing is mulling a US listing. And now Anthropic, the AI firm that has emerged as a serious rival to OpenAI, has decided that American soil offers richer pickings.
Let’s be clear about the arithmetic. Anthropic, valued at over $18 billion in its last funding round, is precisely the sort of company that the UK government has been desperate to attract. The Treasury has talked endlessly about creating a ‘unicorn-friendly’ environment, yet the parade of departures continues. The root cause is not a mystery. It is the same old story of valuation premiums, deeper pools of capital, and a more favourable regulatory climate across the pond. In the US, tech companies can command higher price-to-earnings ratios. The Nasdaq composite index has consistently outperformed the FTSE 100 over the past decade, reflecting a market that rewards innovation with generous multiples. UK pension funds, meanwhile, remain stubbornly risk-averse, preferring Gilts and index-linked bonds to early-stage equity. This capital flight is a structural problem that no amount of ministerial hand-wringing can solve.
Anthropic’s decision also highlights a broader malaise in UK equity culture. The London Stock Exchange has become a graveyard for old-economy stocks: miners, banks, and oil companies. The tech sector accounts for a paltry 1.5% of the FTSE 100’s market capitalisation. Contrast that with the US, where technology and internet stocks make up nearly 40% of the S&P 500. This is not just a cosmetic difference. It has profound implications for the UK’s ability to attract the next generation of high-growth companies. When the most promising AI firms choose to list elsewhere, they take not just their shares but their headquarters, their tax revenues, and their ecosystem of spin-offs and suppliers. The UK’s tax regime has not helped matters either. Entrepreneurs face a maze of capital gains taxes, stamp duty on share transactions, and a punitive IR35 regime for contractors. It is as if the government has designed a system to drive capital away.
Some will argue that listing location does not matter in a globalised market. That is nonsense. A US listing provides access to a broader investor base, more analyst coverage, and a more liquid secondary market. It also signals to potential employees and partners that the company is aiming for the big league. Anthropic’s decision is a rational response to incentives. If the UK wants to reverse this trend, it needs to think radically. That means cutting stamp duty on share transactions, reforming pension fund regulations to encourage more domestic equity investment, and simplifying the tax code for start-ups. Without such measures, the LSE will continue to haemorrhage its most valuable assets. The story of Anthropic is just the latest chapter in a rather depressing saga. The City of London may still be a global financial centre, but when it comes to tech, it is increasingly a spectator.
