Anthropic’s October 26, 2026 S-1 filing, which explicitly names “ANT” as the proposed Nasdaq Global Select Market ticker for its Class A shares, underpins the 97.5% market-implied odds. Goldman Sachs and Morgan Stanley lead a 22-bank syndicate for what could rank among the largest IPOs on record, with first-half 2026 revenue surging to $16.3 billion. Traders view the official designation as near-certain absent a late amendment, consistent with the company’s rapid valuation trajectory toward $1.25–1.75 trillion. A roadshow expected to begin this week and a potential mid-November listing leave little room for deviation, though formal SEC effectiveness and exchange approval remain procedural hurdles.