Anthropic's confidential S-1 filing in June 2026 and Nasdaq listing preparations for a potential November debut have focused trader attention on ticker selection ahead of the IPO, with no official symbol disclosed. Market-implied odds place $ANTH at 37.5% as the clear leader because it aligns directly with the company name, a common convention for brand-driven listings, while shorter variants like $ANT trail at 9.7% and others remain in single digits. Strong revenue momentum—annualized run rate exceeding $110 billion targeted by year-end—supports a potential $2 trillion valuation but has not altered ticker speculation, as underwriters including Goldman Sachs and Morgan Stanley have yet to signal preferences. This leaves outcomes sensitive to the public prospectus release and any last-minute branding decisions.