Comer seeks trading records from Hyperliquid, Crypto.com and PredictIt

House Oversight Chairman James Comer expanded his investigation of possible insider trading on prediction markets Tuesday, asking Hyperliquid Labs, Crypto.com and Aristotle Exchange, which operates PredictIt, for records on account holders and suspicious trades. The three letters set an October 13 deadline for documents covering activity dating back to January 2024.

The requests extend an inquiry opened in May with Kalshi and Polymarket. The committee says those companies have provided nearly 1,000 documents and five briefings. Its new demands ask how additional platforms establish who is trading, enforce access restrictions and refer suspicious activity to regulators or law enforcement.

The letters pursue different questions at each company. Crypto.com is asked about safeguards separating employees' advance knowledge of token listings, custody decisions and regulatory actions from their trading. Comer also requests records of government officials trading contracts tied to crypto regulation or the regulatory status of Crypto.com Derivatives North America.

Hyperliquid's letter points to reporting about a leveraged short position ahead of an October 2025 tariff announcement. It seeks identity-verification records, suspicious-trading alerts and referral procedures. The letter's discussion draws on previously published reporting; it does not establish who controlled the account or prove that the trade used inside information.

PredictIt faces requests about contracts tied to elections, nominations, confirmations and other government actions. The committee also asks how removing its per-contract trader limit affected liquidity and the ability to detect insider trading, and requests a staff briefing.

The next concrete step is the companies' response to those requests. These are congressional document demands, rather than a new trading rule or an enforcement judgment against the three platforms. The Block reported Tuesday that the companies had not responded to its requests for comment by publication time.

For market operators, the letters put account identification, employee information barriers and suspicious-trade referrals under scrutiny together. The committee is seeking internal records to assess those controls; its announcement supplies neither the records nor a final finding about their adequacy.