Recent Reuters reporting that Anthropic has shifted its IPO marketing launch to mid-October at the earliest, with a potential listing days before the November U.S. midterms, is the primary factor anchoring the 58.5% market-implied odds on October 2026. The company’s confidential S-1 filing in June 2026, rapid revenue growth exceeding $65 billion annualized run rate, and pursuit of a $15 billion revolving credit facility have sustained momentum toward a fall 2026 debut targeting up to $2 trillion valuation. November 2026 at 24.9% captures residual scheduling flexibility amid ongoing preparations and market conditions. Traders view the October window as the clearest near-term path given the SEC review timeline and underwriter involvement from Goldman Sachs, JPMorgan, and Morgan Stanley, though final timing remains subject to regulatory and financing developments.