Utah Attorney General Derek Brown announced a lawsuit against Kalshi, its affiliates and two Susquehanna trading companies, alleging that the prediction markets platform had been facilitating illegal betting in the US state since 2024.
In a Tuesday press briefing, Brown said Utah officials had petitioned a court to compel the companies to return about $30 million to $60 million in profits they made through allegedly illegal event contracts. The Utah attorney general alleged that Kalshi illegally offered its services to more than 32,000 users in the state, resulting in significant losses.
“Under Utah law, I have determined that this operation is causing a significant and substantial ongoing harm to a significant number of Utahns,” said Brown. “And so today, we are asking the court to stop sports, elections, politics, culture and mention bets here in Utah.”
Kalshi sued Utah in February after lawmakers passed a bill on betting on prediction markets as gambling under state law. In August, a judge ruled in favor of Utah officials, saying federal laws under the US Commodity Futures Trading Commission (CFTC) do not preempt state gambling laws. An appellate court also denied Kalshi’s request for an injunction in September, blocking the platform from operating during its appeal.
Cointelegraph reached out to Kalshi for comment on the lawsuit but did not receive an immediate response.
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Ongoing legal battles across the US
The civil lawsuit is one of many filed by US state authorities against prediction market platforms like Kalshi and Polymarket over alleged violations of state gambling laws, many involving sports betting. Officials in Arizona remain the only ones in the US pursuing criminal charges against Kalshi, but other states, including Michigan, Ohio, Kentucky, Nevada, Massachusetts, Wisconsin and New York, have filed civil suits against one or more prediction market companies.
The Utah lawsuit comes as the US Supreme Court considers whether to accept a petition to weigh in on New Jersey’s own case against Kalshi over allegedly illegal sports bets. The case, if accepted by the high court, could potentially resolve whether the purview of prediction market companies falls under state authorities or the CFTC, which claims “exclusive jurisdiction” over the platforms’ event contracts.
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