Comer widens prediction market inquiry to three platforms

House Oversight Committee Chairman James Comer on September 29 requested records from Hyperliquid, Crypto.com and Aristotle Exchange, the operator of PredictIt, expanding a congressional inquiry into how prediction-market platforms verify users and identify suspicious trading. The requests seek information on identity checks and procedures for detecting and reporting unusual activity. The committee is examining whether traders may have used nonpublic information, but the supplied reporting does not establish that any of the three platforms or their users engaged in insider trading. The records requests are not findings of wrongdoing. The inquiry’s expansion follows an earlier phase that began in May with requests to Polymarket and Kalshi. The committee said it had received nearly 1,000 documents and five briefings from those platforms. It has not announced what conclusions it has drawn from that material. A central concern in the new requests is a reported leveraged short position in Bitcoin and Ether on Hyperliquid before tariff-related news in October 2025. The position was described as roughly $1.1 billion and reportedly later generated more than $150 million.