The City of London has suffered another defeat in its quest to become a hub for high-growth technology listings. Anthropic, the artificial intelligence company valued at over $60 billion, has confirmed it will list its shares on a US stock exchange, likely the New York Stock Exchange or Nasdaq, rather than in London. The decision, announced earlier today, underscores the persistent challenges facing the London Stock Exchange in attracting the next generation of tech giants.
For a market that prides itself on stability and tradition, this is a dose of cold, hard reality. The yield on the 10-year gilt barely flinched, but beneath the calm surface, the message is clear: the capital is losing the race for high-growth equity. Anthropic joins a growing list of tech firms, from Arm to Revolut, that have chosen the deeper pockets and more favourable regulatory environment of the United States.
Why does this matter? Because listing decisions are not merely symbolic; they have real consequences for market liquidity, job creation and tax revenues. When companies like Anthropic opt for New York, they take with them a slice of the future. London is left to trade in legacy industries, while the innovation premium accrues to the S&P 500.
The root causes are well known but stubbornly resistant to policy fixes. The UK's tax regime for equity compensation is less generous than America's; institutional investors are more risk-averse; and the regulatory burden, though lighter than it once was, still adds frictional costs. Meanwhile, the US markets offer deeper pools of capital, a larger analyst following and a more vibrant ecosystem for IPOs.
From a fiscal perspective, the Chancellor should be alarmed. Every lost listing is a missed opportunity to broaden the tax base and reduce the burden on income taxpayers. Instead, the Treasury is left to borrow more, pushing up gilt yields and crowding out private investment. It is a vicious cycle that stokes inflation through the back door of higher capital costs.
Anthropic itself is a fascinating case study. Founded by former employees of OpenAI, the company has rapidly become a leader in large language models. Its decision to list in the US is a vote of confidence in the American model of concentrated equity markets and shareholder primacy. For UK investors, gaining exposure to such a company will now require buying US-listed shares, adding a layer of currency risk and foreign withholding taxes.
The Financial Conduct Authority has tried to modernise listing rules, easing dual-class share structures and reducing free float requirements. But these incremental changes have proved insufficient. What London needs is a fundamental shift in mindset, from a defensive regulator to an aggressive promoter of market activity. That would mean slashing the stamp duty on share transactions, a tax that even the IMF has called inefficient, and aligning insider trading rules with the US to reduce compliance costs.
Until then, the capital flight will continue. Each announcement like Anthropic's chips away at London's status as a global financial centre. The irony is that the City remains a powerhouse in derivatives, foreign exchange and bond trading, but its equity market is becoming a backwater. The bottom line is clear: if we want to host the world's most dynamic companies, we must offer terms that compete with the best, not the most comfortable.
In the short term, expect the FTSE 100 to shrug this off. It is, after all, a benchmark for mature, dividend-paying stocks. But the long-term trajectory is worrying. Without a vibrant IPO market, the UK's pension funds and retail investors will miss out on the growth of the 21st century. Anthropic's choice is a symptom, not a cause. The disease is complacency.
