Anthropic's annualized revenue run rate reached $65 billion at the end of July, marking a roughly sevenfold increase from a year earlier as demand for its Claude enterprise tools accelerated. CNBC confirmed the figure on Monday after the company shared the update with investors over the weekend, according to two sources familiar with the matter. The growth comes as Anthropic prepares for an expected IPO (initial public offering) after confidentially filing a prospectus with the Securities and Exchange Commission (U.S. markets regulator) in June and holding preliminary meetings with potential investors, though no debut timeline has been announced. A source also said Anthropic posted a preliminary second-quarter revenue figure of $11.5 billion, up 14-fold from a year ago. The latest run rate compares with more than $47 billion disclosed in May and with roughly $10 billion in revenue the company generated for all of 2025. Rival OpenAI recently reached a $40 billion annualized revenue run rate, CNBC reported last week.