Anthropic Files for IPO, Putting AI Growth to a Wall Street Test

Anthropic filed publicly for an initial public offering on October 26, moving the Claude maker closer to a Nasdaq listing under the ticker ANT. The proposed offering puts the finances and growth expectations of a leading AI developer before public-market investors, while leaving its timing, price and size unsettled. The company’s SEC filing follows a confidential submission in June. Anthropic has not specified how much it plans to raise; a debut as soon as next month has been reported, but the filing itself does not set a date. If it proceeds, Anthropic could become the first company focused primarily on advanced AI models to go public, ahead of rival OpenAI, which has said it does not expect to list until 2027, according to Axios. The filing reports $16.29 billion in revenue for the first half of 2026, about 14 times the year-earlier period, alongside an $80.75 billion net loss. A one-time $72.4 billion accounting charge related to financing agreements made up most of that loss, the filing says. Those figures set up a central question for investors: whether rapid customer demand can support the large and continuing expense of developing and running AI systems. The listing could also test appetite for AI shares after SpaceX raised a record $86 billion in its June IPO. Anthropic has not published an offer size or price, and figures discussed publicly remain estimates, not company targets. Investors and analysts see reasons for optimism in the company’s rapid growth and broad business adoption, while raising concerns about long-term computing commitments, customer concentration and whether customers will keep paying premium prices as competitors improve and lower-cost alternatives grow. Anthropic’s five largest customers made up about a quarter of revenue in the first nine months of 2026, and nearly half of its first-half revenue came through cloud marketplaces run by Amazon, Google and Microsoft, which are also investors, suppliers or competitors. That mix of commercial ties and infrastructure dependence adds complexity to assessing the business. The prospectus also lays out AI-related risks, including the possibility of catastrophic harm from advanced systems, placing the company’s stated safety concerns alongside its plans for commercial expansion. The filing gives the market a fuller view of Anthropic’s business, but investors still have to judge whether revenue growth can justify its costs and the scale of its infrastructure commitments. The Associated Press and Axios reported on the filing’s financial disclosures and the questions investors are weighing.