Recent reporting has positioned November 2026 as the leading outcome for Anthropic’s IPO, with market-implied odds at 57 percent reflecting confirmed plans to begin marketing in mid-November and list before Thanksgiving. The company delayed an earlier October window to incorporate full third-quarter financial results amid surging revenue run rates exceeding $65 billion and heavy compute spending, while preparing a prospectus that highlights its Claude large language models and competitive positioning against OpenAI. A confidential S-1 filing, banking syndicate including Morgan Stanley, and potential $2 trillion valuation underpin the timeline, though regulatory reviews, market conditions, and execution risks could still shift the exact date within the month.