House Oversight Committee Probes Kalshi and Polymarket for Insider Trading Concerns

By Patricia Miller

May 22, 2026

2 min read

The House Oversight Committee is investigating Kalshi and Polymarket for insider trading amid rising scrutiny and regulatory concerns.

#What is the House Oversight Committee investigating regarding prediction markets?

The House Oversight Committee is currently conducting an investigation into prediction markets such as Kalshi and Polymarket due to concerns regarding potential insider trading practices. Committee Chair James Comer highlighted the urgency of this inquiry during a recent interview, where he disclosed that letters have been sent to the CEOs of both companies. These letters request critical internal documentation by June 5, focusing on identity verification, geographic restrictions, and the detection of unusual trading activities. This investigation emerges amid heightened attention from lawmakers spurred by alarming incidents, including a U.S. soldier allegedly profiting from classified information and congressional candidates betting on their own races. The Committee aims to assess whether these markets allow individuals to exploit insider knowledge and whether they are sticking to legal protections effectively. The investigation's goal is also to use the findings to develop legislation prohibiting government employees and members of Congress from betting in these markets.

#Why are prediction markets gaining attention from lawmakers?

Prediction markets have surged in popularity in recent years, granting users the ability to wager on various outcomes such as elections, sports, policy decisions, and entertainment award shows. As their influence expands, so do the concerns from lawmakers and regulators regarding the potential for government officials to leverage insider information for personal gain. Kalshi, in particular, has attracted scrutiny after it was discovered that several political candidates were placing bets on their own campaigns. In response to these events, the platform took action in April by suspending three congressional candidates associated with these transactions. Bipartisan efforts are underway as lawmakers from various political backgrounds are advocating for stricter regulations on prediction markets. A number of legislative proposals introduced in Congress aim to tackle insider trading and various issues affecting online betting platforms. Furthermore, Rep. Chris Pappas and other Democratic lawmakers have called upon the Oversight Committee to subpoena prediction market companies to further investigate these issues. The outcomes of this investigation and subsequent legislation could significantly reshape how prediction markets operate and the regulations governing their use by public officials.

Important Notice And Disclaimer

This article does not provide any financial advice and is not a recommendation to deal in any securities or product. Investments may fall in value and an investor may lose some or all of their investment. Past performance is not an indicator of future performance.