Recent Bloomberg reporting confirms Anthropic is targeting a mid-November 2026 IPO, with formal marketing eyed for the week of November 9 to allow trading before Thanksgiving, after earlier delays from an October window. The AI lab behind the Claude large language model confidentially filed its S-1 in June and released a prospectus in late September detailing rapid revenue growth to a $65 billion annualized run rate alongside substantial compute infrastructure commitments exceeding $500 billion. Traders assign November the highest implied probability at 59.4% because these verified timelines align with the company's push to demonstrate Q3 results and secure a potential $2 trillion valuation before year-end, while later months reflect contingency buffers for market or regulatory shifts.