Open interest in perpetual futures tied to private AI company Anthropic has surpassed $300 million across multiple markets, according to data from analytics platform Buildix. The exposure is spread across several contracts rather than concentrated in a single instrument. On Hyperliquid, readings taken 25 minutes apart on November 11 showed one contract alone carrying $109.37 million in open interest, representing an approximately 30% increase from November 10 levels. The rapid growth in synthetic exposure to the pre-IPO AI firm highlights rising trader appetite for leveraged bets on private market valuations through on-chain derivatives.