Anthropic’s recent S-1 filing on October 26, revealing 1,300%+ revenue growth to $16.3 billion in the first half of 2026 alongside plans for a Nasdaq listing under ticker ANT as early as mid-November, anchors the 87.5% market-implied probability of a first-day close above the IPO price. Traders see this as the latest high-profile AI debut in a sector still riding post-SpaceX momentum, with expected pricing at a $1.5–2 trillion valuation likely incorporating a traditional underpricing buffer to attract broad institutional demand. Key upcoming catalysts include the roadshow starting around November 9 and final pricing details, though steep losses, massive compute commitments, and highlighted AI safety risks could introduce volatility if sentiment shifts before trading begins.