Anthropic files for proposed IPO as first-half revenue reaches $16.3 billion

Anthropic said it filed an S-1 registration statement with the SEC for a proposed IPO of Class A common stock.[1] The SEC filing date was October 26, 2026.[2] Anthropic intends to list the shares on the Nasdaq Global Select Market under the symbol ANT.[1] It has not determined how many shares it will offer or the proposed price range.[1] The filing also says the securities may not be sold before the registration statement becomes effective.[1] It reports that no public market for the Class A stock existed before the offering.[2]

Bloomberg reported that Anthropic’s revenue reached $16.3 billion in the first half of 2026.[3] Bloomberg said the company would need to persuade investors it can sustain rapid growth amid competition while managing billions in computing costs.[3] Those points frame the financial questions around the proposed offering: the reported revenue figure shows the scale of sales, while the cost and competition concerns remain central to the investor case.[3] The available evidence does not provide a specific figure for Anthropic’s computing bill.[3]

Sales through Amazon, Google and Microsoft cloud providers accounted for 48% of Anthropic’s revenue in the first half of 2026, up from 11% in 2023, Bloomberg reported.[4] Customers can access Claude models through their existing accounts with those cloud providers.[4] The providers bill customers, retain a fee and pass the remainder to Anthropic.[4] For investors assessing revenue quality, the reported channel share and fee arrangement offer context on how some sales reach customers; the evidence does not specify the fee levels.[4]

Semafor reported an 85% gross profit margin for Anthropic’s core business of running existing AI models.[6] That figure excludes model-training costs, and Anthropic was still losing money overall, Semafor said.[6] The Wall Street Journal reported an $80.7 billion net loss for the first half of the year.[5] Semafor compared the core-product margin with Meta’s roughly 81% to 82% gross margin, estimated 75% to 80% margins for Google Search ads, and the iPhone’s mid-40% margin.[6] It said Anthropic’s similar business model could make the margin a positive sign for OpenAI.[6]