The House Committee on Oversight and Government Reform has expanded its investigation into possible insider trading in prediction markets to Crypto.com, Hyperliquid and PredictIt. Chairman James Comer requested records on the platforms’ user identity-verification procedures, geolocation controls, systems for detecting trades suspected of using nonpublic information, and any related reports submitted to regulators or law enforcement during the past two and a half years. The latest inquiry follows an earlier review of Kalshi and Polymarket that produced nearly 1,000 documents and five briefings, according to the committee. Lawmakers have cited several cases, including an alleged $400,000 profit by a U.S. special forces soldier betting on the removal of Venezuelan President Nicolás Maduro, and Kalshi’s August ban of former Representative George Santos after an alleged profit of more than $17,000. Kalshi said in Q1 that it had opened 150 internal investigations and made more than 20 referrals to law enforcement for possible insider activity. Hyperliquid is the only fully decentralized platform in the current probe and does not use KYC. The committee also questioned a reported $1.1 billion short position opened before a major tariff-policy announcement last October. Separately, Senate Democrats are seeking bipartisan legislation that would give the SEC oversight of event contracts deemed securities.