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House Republicans Launch Investigation into Kalshi and Polymarket for Insider Trading

House Republicans have initiated an investigation into Kalshi and Polymarket over insider trading allegations, focusing on military-related bets.

Mercation Admin
May 22, 2026 1 min read
House Republicans Launch Investigation into Kalshi and Polymarket for Insider Trading

House Republicans Investigate Prediction Market Platforms

House Republicans have officially launched an investigation into the prediction market platforms Kalshi and Polymarket amid allegations of insider trading. This inquiry, spearheaded by Rep. James Comer, Chair of the House Oversight Committee, focuses on potential misuse of confidential information by users placing bets on these platforms.

Comer has requested a range of documentation from both companies, including records related to their know-your-customer (KYC) protocols and mechanisms for identifying suspicious trading activities. Specific attention is being given to bets associated with military operations in Iran and Venezuela, as well as overall assessments of how insider trading allegations have impacted their reputations.

The investigation follows a troubling incident where a U.S. soldier was arrested for allegedly using classified information to make bets on Polymarket concerning military actions. Additionally, Kalshi recently penalized several politicians for wagering on election outcomes, raising further concerns about integrity in prediction markets.

Comer indicated that the rising trend of insider trading on these platforms necessitates Congressional oversight, stating, "This increasing trend of insider trading on prediction market platforms suggests that Congressional intervention may be warranted." He has sent letters to the CEOs of both companies, demanding comprehensive documentation related to their operations.

The inquiry is partly prompted by a recent New York Times report highlighting over 80 suspected instances of insider trading on Polymarket. As scrutiny intensifies, both Kalshi and Polymarket are under pressure to demonstrate their commitment to preventing insider trading, although experts have raised doubts about the effectiveness of their detection capabilities.

Unlike previous Democratic-led efforts to investigate cryptocurrency firms, this inquiry has garnered support from Republican leadership, indicating potential for legally binding subpoenas given the GOP's majority in the House.

House Republicans Investigate Kalshi and Polymarket Insider Fraud — Mercation