Anthropic’s near-certain November 2026 IPO reflects its completed S-1 filings, active roadshow launched November 10, and confirmed pricing window of November 18 with Nasdaq trading expected November 19 under ticker ANT. The frontier AI developer behind Claude has secured a $70–$78 share range targeting up to $1.4 trillion valuation, plus $26 billion in concurrent private placements from Nvidia, Google, Microsoft and others, aligning with strong institutional demand and run-rate revenue exceeding $80 billion. This timeline matches historical precedent for large tech offerings once public filings and marketing begin. Delays remain possible from last-minute regulatory clearance issues, sudden market volatility in AI valuations, or shifts in underwriter commitments, though current momentum makes slippage into December unlikely without major disruption.