Interactive Brokers opens Anthropic Nasdaq IPO access to UK clients

The Anthropic access sits alongside Interactive Brokers' push to apply technology to global market access, part of a broader efficiency story built on tight costs and high pre-tax margins. For fiscal 2025, 78% and US$1.2b are recent figures for that narrative, and an investor identified as LunaRodas argues the efficiency story has held up even as growth rates moderated.

The Anthropic UK allocation is incremental, and a more consequential near-term swing factor is whether client activity per account stabilises, given prior commentary flagging broad based softer trading. It also flags execution risk across multiple parallel projects, from AI trading rollouts to international expansion, without stretching systems, compliance or service.

The other development is Interactive Brokers' launch of autonomous AI trading, which turns the broker from a low-cost execution platform into an infrastructure provider for AI agents, with guardrails and eligibility tests on top of the existing API and Connector framework. That could deepen engagement from the same active customer base that drives commission and interest income, while raising risk management and regulatory questions.