Anthropic is trading at a 41% implied probability of delivering the largest initial public offering of 2026 in prediction markets, where liquidity stands at $27.3K and 137 days remain before the market resolves. The Claude chatbot developer was most recently valued at $965 billion in its May 2026 Series H round, and that private-market benchmark is helping drive expectations that it could outsize rival AI listings this year. No public offering details have been finalized, however, and sub-markets tracking Anthropic's market cap at the close of any IPO show a wide spread of outcomes. Traders are focused on listing signals such as an S-1 registration statement with the SEC (U.S. securities regulator), an indicated price range and a confirmed debut date, while broader AI valuations, market conditions, institutional positioning and shifts in private-market pricing could all change the trajectory.