Anthropic's October 26 SEC S-1 filing explicitly designates the Nasdaq ticker ANT for its planned listing, directly anchoring the 96.8% market-implied odds for that outcome. The filing details first-half 2026 revenue of $16.3 billion—more than 13 times the prior-year level—alongside heavy compute commitments and a target raise potentially exceeding $100 billion at a $1.5–2 trillion valuation, underscoring the company's scale and reinforcing trader consensus around the stated symbol. With the expected debut in the week of November 16, this official designation creates a high bar for alternatives. Realistic challenges remain limited to last-minute amendments, regulatory delays, or unforeseen listing changes, though such shifts appear improbable given the prospectus details already in public view.