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Anthropic, the developer of the AI model Claude, filed its IPO prospectus with the U.S. SEC on October 26, 2026, to list on Nasdaq under the ticker 'ANT' next month. Korean outlets report this could be the largest IPO ever, with potential valuations around $2 trillion (roughly 136 trillion won) and an $800 billion spending commitment disclosed. The filing follows a period of surging revenue and massive infrastructure costs, positioning it as a test for AI industry growth and profitability, according to Yonhap, Chosun Ilbo, and others. SK Telecom shares rose in early trading on October 27 following the news, as reported by Hankyung. Korean media note the IPO comes despite CEO warnings about existential AI risks, framing it as a gauge of AI investment enthusiasm amid concerns.