Kalshi Sues Missouri Over the State’s Attempt to Regulate Prediction Markets

Kalshi has filed suit against the Missouri Gaming Commission and state officials, arguing that prediction markets are regulated exclusively by the Commodity Futures Trading Commission (CFTC), not by state gambling authorities. For high-risk operators, the case is another reminder that the fight is not just about product design — it is about which regulator gets to decide whether the business is a financial market or a betting operation.

1. Earlier this week, Kalshi sued the Missouri Gaming Commission and several state officials after Missouri Attorney General Catherine Hanaway sent cease-and-desist letters to Kalshi and other prediction market platforms last month. Those letters alleged that the platforms were offering illegal sports betting and gave them until October 16 to comply.
2. Kalshi’s core argument is that the Commodity Exchange Act (CEA) gives the CFTC “exclusive jurisdiction” over financial instruments, including “swaps,” traded on designated contract markets. The company also relies on the Supremacy Clause of the US Constitution, arguing that federal law overrides conflicting state law.
3. In practical terms, Kalshi says Missouri is forcing a blunt choice: stop operating in the state, or get licensed by the Missouri Gaming Commission, pay state taxes and fees, and block users under 21. That is the part high-risk operators will recognize immediately: once a state frames your product as gambling, the compliance stack changes fast.
4. Missouri disputes Kalshi’s reading of the CEA and says its event contracts do not qualify as “swaps.” Hanaway argued in the cease-and-desist letter that Missouri’s position matches that of most federal courts, which have found that Kalshi’s online sports wagering platform is subject to state gambling laws. The state says the contracts are bets, not swaps, and that the CEA does not preempt state gambling regulation here.
5. The Missouri Attorney General’s Office also said sports betting should be regulated the same way whether wagers are placed through online prediction markets or traditional casinos. It pointed to the licensing and taxation requirements approved by Missouri voters and said it remains committed to enforcing state law, while expressing confidence that federal courts will not stop that enforcement.

Missouri is not the only place where Kalshi is facing pressure this week. On Wednesday, Utah filed 14 criminal charges against Kalshi and its co-founders, accusing the operator of violating state gambling laws by allowing users to bet on sporting events.