The market-implied probability of 97.7% for an Anthropic IPO in November 2026 reflects the AI company's amended SEC filing on November 10 that set a $70–$78 per share price range for 825 million Class A shares and launched its roadshow, with expected pricing around November 18 and Nasdaq trading under ticker ANT beginning near November 19. This aligns with Anthropic's strong run-rate revenue growth to $81 billion and $26 billion in concurrent private placements from strategic investors including Google and Nvidia. Trader consensus treats the timeline as near-certain given the advanced filing stage, though realistic disruptions such as prolonged market volatility in AI stocks or last-minute regulatory hurdles could still push the debut into December.