In a move that underscores the growing chasm between American and British tech markets, Anthropic, the artificial intelligence company known for its Claude models, is preparing to go public on a US exchange. Sources confirm the company is working with investment banks for an IPO that could value it at over $30 billion. The decision deals another blow to the London Stock Exchange, which has struggled to retain high-growth tech firms. Industry voices are now urging UK regulators to rethink listing rules to attract AI giants before the brain drain becomes irreversible.
Anthropic’s choice is pragmatic. The US market offers deeper pools of capital, a more familiar regulatory environment, and a valuation premium for AI companies. But the symbolism is painful. London has lost Arm to Nasdaq, and now another crown jewel of British AI talent is crossing the Atlantic. The problem is structural. UK listing rules require a 25% free float, demand detailed quarterly reporting, and impose a different governance culture. For AI firms, where speed and secrecy are paramount, these are hurdles.
Some argue for a ‘Brexit dividend’ approach: deregulate to compete. But we must be careful. Lowering standards to lure unicorns could invite fragile companies that harm investors. Instead, the LSE could introduce a ‘tech growth’ segment with lighter disclosure for early-stage AI firms, coupled with stronger post-listing supervision. Other ideas include fast-tracking IPOs for companies with a UK nexus, or offering co-investment funds to sweeten the deal.
Yet the real issue is deeper. AI companies worry about the UK’s post-Brexit divergence on AI regulation. While the EU finalises its AI Act and the US moves towards voluntary frameworks, Britain’s ‘pro-innovation’ approach risks being seen as permissive but unstable. Investors want predictability. The government’s AI Safety Summit was a start, but the follow-through on regulation is ambiguous.
Anthropic’s IPO is not a disaster if it becomes a wake-up call. London can still be a global AI hub, but not by being a cheap imitation of Silicon Valley. We need our own value proposition: a ecosystem that pairs strong ethics with commercial ambition. The Chancellor should convene a task force of AI founders, investors, and regulators to redesign the listing playbook. Time is not on our side. The next Anthropic might not wait.
