Prediction markets assign 54% to 58.5% probability to Anthropic completing its IPO before November 2026, with odds reaching 74 to 79% if the window extends to end of December. The company confidentially filed an S-1 with the SEC on June 1, 2026, with a marketing roadshow planned for mid-October and Goldman Sachs, JPMorgan, Morgan Stanley, and Citi as lead underwriters. Its last private valuation stood at $965 billion following a $65 billion funding round closed on May 28, 2026. Public market forecasts project an initial market capitalization near or above $1.8 trillion.
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