Kalshi Faces Utah Lawsuit, Founder Hints at Supreme Court Battle

Utah authorities are seeking to remove Kalshi from the state, alleging its operations constitute illegal gambling. Kalshi’s co-founder, Tarek Mansour, has indicated a willingness to pursue the regulatory dispute to the Supreme Court.

What Happened

Utah’s Attorney General Derek Brown filed a state court lawsuit against prediction market giant Kalshi, alleging the company operates as “the manager of a back-alley gambling den” in a state where gambling is prohibited (New York Post). The suit, filed on Tuesday, demands that Kalshi return millions reportedly earned in Utah to residents, citing a “brazen pattern of unlawful conduct” by the company.

Kalshi offers event contracts on various real-world occurrences, including sports, entertainment awards, weather patterns, and consumer prices. The company asserts that its event contracts are financial “swaps” sanctioned by the Commodities Futures Trading Commission (CFTC) and that federal approval preempts state-level prohibitions (New York Post). A Kalshi spokeswoman stated, “Kalshi is a federally regulated financial exchange, like the stock market. Our customers trade with each other and set the prices,” adding that as a national derivatives market overseen by the CFTC, Kalshi adheres to federal law, and no single state should override it. The spokeswoman further clarified that this state court action does not impact ongoing federal litigation.

Key Details

• Utah’s lawsuit names four Kalshi subsidiaries and two Pennsylvania-based trading companies providing pricing and liquidity for the platform (New York Post).
• Attorney General Brown specified that the lawsuit does not target the more than 32,000 Utah residents who have verified Kalshi accounts (New York Post).
• The complaint alleges Kalshi operates as a gambling provider by acting as the market maker, facilitating wagers, and retaining a portion of each wager as its payment, describing it as “administering a closed-loop wagering system” (New York Post).
• The suit also claims that while Kalshi initially offered wagers tied to traditional financial instruments, it began offering sports trading around 2024, adopting language specifically referencing wagers on professional football and other sports, thereby eliminating any distinction from gambling (New York Post).
• According to a source close to the company, sports betting accounts for as much as 70% of Kalshi’s estimated $4 billion in revenue for the 12 months ending in July (New York Post).

Why It Matters

This legal challenge from Utah represents the latest in a series of regulatory disputes for Kalshi and other prediction markets across the United States. States including New York and Nevada, along with US Native American tribes, have also initiated lawsuits to prevent these companies from operating within their jurisdictions (New York Post). A US appeals court recently ruled that Ohio and Tennessee can regulate Kalshi’s event contracts under gambling laws, which was described as a significant setback for prediction markets (New York Post).

Kalshi’s co-founder, Tarek Mansour, speaking on the Reuters Econ World podcast, expressed confidence in the company’s position, citing the clarity of the statute and structure that grants the CFTC authority over such activities. Following an appeals court victory in a New Jersey case, that state requested a Supreme Court review, indicating the potential for this regulatory debate to reach the nation’s highest court (New York Post).

What’s Next

Despite mounting legal hurdles, Kalshi has reportedly raised a total of $2.6 billion and has been in discussions for additional financing that could value the company at $40 billion (New York Post). Investors have reportedly maintained optimism that the company can prevail in some of these lawsuits, viewing its business model as viable even if regulators impose restrictions. Some venture capitalists suggest that the Trump administration’s support for prediction markets might lead to Kalshi becoming sufficiently integrated into financial markets and daily life, making its unwinding unpopular by the time a new administration takes office (New York Post).

Originally reported by New York Post·Published 21 Oct 2026, 16:57