Anthropic, founded in 2021, has become one of the leading AI research companies, known for developing Claude, a large language model competing with OpenAI's GPT series. The company has attracted significant funding rounds, reaching a valuation of $15 billion in late 2024. This market predicts whether Anthropic's market capitalization will fall between $400 billion and $600 billion at the close of trading on its initial public offering day by December 31, 2027. The current YES odds at 2% suggest traders view this valuation range as unlikely. For context, recent comparable tech IPOs have shown varied market cap trajectories. Anthropic's eventual public valuation will depend on several factors: revenue growth from enterprise AI adoption, competitive dynamics with other AI labs, regulatory environment for AI systems, and broader market sentiment toward AI companies at the time of offering. The wide range ($400B–$600B) reflects uncertainty about both market conditions in late 2027 and Anthropic's operational achievements by then. Recent trading volume remains modest at $109 with $5,281 in market liquidity, indicating limited market interest in this particular outcome range.