Anthropic’s recent S-1 filing on October 26, 2026, has become the dominant catalyst for trader positioning in the Anthropic IPO market, confirming plans for a Nasdaq listing under ticker ANT as early as the week of November 16. The prospectus highlighted explosive revenue growth to $16.3 billion in the first half of 2026—more than 13 times the prior-year period—alongside narrowed operating losses of $693 million and heavy infrastructure commitments exceeding $417 billion through 2045. This rapid scaling from a $965 billion private valuation in May supports expectations of a $1.5–2 trillion IPO valuation and a potential $100 billion raise, the largest on record. Market-implied odds reflect high conviction in near-term completion given the compressed timeline before Thanksgiving, tempered by disclosure of material risks around compute costs, revenue sustainability, and AI governance. Third-quarter results and final pricing details represent the next near-term swing factors for sentiment.