Anthropic’s October 26, 2026 SEC S-1 filing for a Nasdaq listing under ticker “ANT” is the dominant catalyst shaping trader views on an imminent IPO, with expectations for trading the week of November 16 ahead of Thanksgiving. The company reported first-half 2026 revenue of $16.3 billion, a 1,300% increase year-over-year driven largely by the second quarter, alongside its first operating profit of $974 million in Q2, though the half produced a $693 million operating loss and an $80.7 billion net loss dominated by non-cash convertible note revaluations. Private valuations reached $965 billion after the May Series H round, with IPO estimates ranging from $1.5 trillion to $2 trillion and potential proceeds up to $100 billion. Heavy compute commitments exceeding $400 billion and warnings on revenue sustainability and AI-related risks remain key variables for institutional positioning ahead of the debut.