On November 11, 2026, TechFlow reported, citing The Defiant, that two Buildix snapshots showed more than $311 million in combined open interest across two Anthropic pre-IPO perpetual contracts on Hyperliquid. The readings were taken 25 minutes apart, so the figure is not a synchronized market-wide total.
Trade.xyz’s ANT contract had $109.37 million in open interest, about 30% above the $84.04 million The Defiant recorded on November 10. EntropyIO’s ANTH contract had $201.81 million.
The contracts use different price references: ANT refers to one Anthropic Class A share, while each ANTH price point represents $1 billion in company valuation. Open interest in these contracts does not mean Anthropic shares were purchased or that the company received funding.
Original report: TechFlow, published November 11, 2026, at 22:53 (UTC+8).