House Oversight Opens Insider Trading Probe Into Kalshi And Polymarket
On Friday, May 22, 2026, Rep. James Comer announced a House Oversight investigation into alleged insider trading and market manipulation on prediction markets Kalshi and Polymarket.[1]
Comer's letters say the committee is probing whether users used classified information to trade on military operations and political developments, and whether offshore or anonymous accounts are being used to skirt U.S. rules.[1] The letters request details on identity-verification procedures, enforcement of geographic restrictions, and methods for detecting anomalous trading activity.[1] Kalshi said it will cooperate with the committee and defended its "comprehensive protections against insider trading," and Polymarket said it maintains a "comprehensive market integrity framework" and called itself a pioneer in transparency.[1] In April Kalshi suspended three political candidates for betting on their own races.[1] Last month a U.S. Army Special Forces soldier was charged with using classified intelligence to place Polymarket bets tied to an operation to capture Nicolás Maduro, allegedly netting more than $400,000.[1]
In April the Senate unanimously approved a bipartisan measure banning senators and Senate staff from trading on prediction markets.[1] The Trump administration sued Minnesota after the governor signed the state's ban into law, with federal regulators arguing in court that Congress has exclusive oversight of prediction markets.[1]
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📌 Key Facts
- On Friday, May 22, 2026, Rep. James Comer announced the launch of a House Oversight investigation into alleged insider trading and market manipulation on online prediction markets (Rep. James Comer).
- Comer’s letters say the committee is examining whether users exploited classified information to trade on sensitive events — including military operations and political developments — and whether offshore or anonymous accounts are being used to circumvent U.S. regulations; the letters request details on identity-verification procedures, enforcement of geographic restrictions, and methods for detecting anomalous trading activity (Comer’s letters).
- Kalshi said it will cooperate with the committee and defended its “comprehensive protections against insider trading” (Kalshi).
- Polymarket said it maintains a “comprehensive market integrity framework” and called its platform a pioneer in transparency (Polymarket).
- In April, Kalshi suspended three political candidates for betting on their own elections, and in April a U.S. Army Special Forces soldier was charged with using classified intelligence to place Polymarket bets tied to an operation to capture ousted Venezuelan President Nicolás Maduro, allegedly netting more than $400,000 (a U.S. Army Special Forces soldier).
- The article notes that the Senate unanimously approved a bipartisan measure in April banning senators and Senate staff from trading on prediction markets, and that the Trump administration sued Minnesota after Gov. Tim Walz signed the state’s ban into law, with federal regulators arguing in court that Congress has exclusive oversight (Senate unanimously approved a bipartisan measure).
📰 Source Timeline (2)
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- On Friday, May 22, 2026, Rep. James Comer announced that he launched a House Oversight investigation into alleged insider trading and market manipulation on online prediction markets.
- Comer’s letters state the committee is examining whether users are exploiting classified information to trade on sensitive events, including military operations and political developments, and whether offshore users are circumventing U.S. regulations through anonymous or foreign accounts.
- The letters specifically request details on identity-verification procedures for domestic and international users, enforcement of geographic restrictions, and methods for detecting anomalous trading activity.
- Kalshi said it plans to cooperate with the committee and defended its “comprehensive protections against insider trading,” while Polymarket said it maintains a “comprehensive market integrity framework” and called its platform a pioneer in transparency.
- The article reiterates that in April Kalshi suspended three political candidates for betting on their own elections and that last month a U.S. Army Special Forces soldier was charged with using classified intelligence to place Polymarket bets tied to the operation to capture ousted Venezuelan President Nicolás Maduro, allegedly netting more than $400,000.
- The piece notes that the Senate unanimously approved a bipartisan measure in April banning senators and Senate staff from trading on prediction markets and states that the Trump administration sued Minnesota on Tuesday after Gov. Tim Walz signed the first statewide ban on prediction markets into law, with federal regulators arguing in court that Congress has exclusive oversight.