The decision by artificial intelligence heavyweight Anthropic to pursue a US stock market listing has sent a fresh tremor through the City. The move, confirmed by sources close to the company, underscores a persistent and worrying trend: Britain’s failure to attract high-growth technology firms to its public markets. For a government that has hyped the ‘British Silicon Valley’ narrative, this is cold comfort.
Anthropic, a San Francisco-based firm at the forefront of generative AI, is reportedly seeking a valuation exceeding $50 billion. That is a prize London could ill afford to lose. Yet lose it we have, thanks to a cocktail of structural disadvantages: thin liquidity in tech stocks, a risk-averse investor base, and a regulatory environment that lacks the allure of New York’s deep capital pools.
The London Stock Exchange has long suffered from a perception problem. Pension funds here are notoriously shy of backing unprofitable growth stories, preferring instead the steady dividends of utilities and miners. Contrast that with US markets, where venture capital, hedge funds, and sovereign wealth funds happily underwrite ambitious tech valuations. The result is a self-fulfilling prophecy: the best companies choose NASDAQ or NYSE, leaving London with a second-tier roster of ‘also-ran’ tech plays.
This is not just about Anthropic. The exodus of high-growth firms has become a haemorrhage. Since the Brexit vote, over 40 tech companies have opted for US listings, including fintech darling Revolut and chip designer Arm, which briefly returned to London only to decamp to New York. Each departure further erodes London’s credibility as a global tech hub.
Government initiatives such as the Edinburgh Reforms and the listing rule changes by the Financial Conduct Authority are laudable but insufficient. Tinkering with free float requirements or dual-class share structures will not reverse a decade of underperformance. What is needed is a cultural shift in institutional investment behaviour and a serious effort to broaden the tax incentives that propel US markets.
The Treasury will no doubt express disappointment at Anthropic’s decision. But disappointment is not a strategy. The real failure lies in the unwillingness to grapple with the core issue: capital flight. Money flows to where it is treated best, and right now that is across the Atlantic. Until London can offer a compelling alternative, the brain drain will continue. The Chancellor should take note. Silicon Valley may be a state of mind, but its beating heart is in New York stock exchange listings.
