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At close · Tue, Oct 27, 2026
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Anthropic files for potentially record-breaking $1.5tn stock market valuation in key test for AI industry

Market debut of firm behind Claude chatbot will be one of largest in US history, a test of AI boom’s financial viability Anthropic has publicly filed for a stock market listing in what is slated to be one of the largest debuts in history. The company’s float on the US market will serve as a test of the financial viability of the multitrillion-dollar AI boom. Analysts and investors have valued the San Francisco-based company, founded in 2021, at more than $1.5tn. The company, which will will list under the symbol ANT, confidentially filed with US financial regulators for an initial public offer

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