Anthropic’s recent SEC S-1 filing on October 26 has driven the overwhelming market consensus for a November 2026 IPO, with traders assigning an 87.8% implied probability to that outcome. The filing, which disclosed $16.3 billion in first-half revenue and plans for a Nasdaq listing under ticker ANT, enables a roadshow as soon as the week of November 9 and potential trading the week of November 16—well before Thanksgiving. This timeline aligns with the company’s push to raise over $100 billion at a projected $1.5–2 trillion valuation amid intense competition in large language models. While product timelines and market conditions can shift, the public registration and underwriter commitments create a narrow window that strongly favors November resolution over later months.