MO ยท Checked Oct. 21, 2026
Prediction market law in Missouri
In litigation
Missouri told six prediction-market operators to stop sports contracts or get licensed; Novig and Crypto.com sued the attorney general in federal court.
Missouri's regulated sports betting market launched on Dec. 1, 2025. In letters dated Sept. 16, 2026 and announced Sept. 18, 2026, Attorney General Catherine Hanaway told Kalshi, Polymarket US's exchange, Crypto.com's exchange, Robinhood, Novig and Underdog to stop offering sports contracts or get a state license, pay taxes and bar users under 21, within 30 days. PrizePicks, which got no letter, paused its sports product in the state in early October. As the deadline arrived on Oct. 16, 2026, Novig and Crypto.com's exchange filed separate federal suits seeking to block enforcement. No court ruling and no state lawsuit against an operator was found.
Timeline of state actions
Operator lawsuit, Novig
Novig's exchange, Ludlow Exchange, sued the attorney general and Gaming Commission officials in the Eastern District of Missouri, arguing the CFTC has exclusive jurisdiction.
Source: DeFi Rate tracker sources page
Operator lawsuit, Crypto.com
North American Derivatives Exchange (OG.com Prediction Markets, Crypto.com's exchange) sued in the Western District of Missouri, also arguing federal preemption.
Source: DeFi Rate tracker sources page
Other development, Kalshi
Missouri's attorney general signed an Ohio-led amicus brief, joined by 38 other states and DC, asking the U.S. Supreme Court to grant New Jersey's petition in Flaherty v. KalshiEX (No. 26-299).
Source: Ohio et al. amicus brief, U.S. Supreme Court No. 26-299
Other development, PrizePicks
PrizePicks, which did not receive a letter, told customers it was suspending its sports prediction product in Missouri.
Source: SBC Americas
Cease-and-desist, Kalshi, Polymarket US, Crypto.com, Robinhood, Novig, Underdog
The attorney general demanded each operator stop offering sports contracts to people in Missouri, or obtain a Gaming Commission license, pay the 10% wagering tax and fees, and bar under-21 users, within 30 days; the letters were announced Sept. 18, 2026.
Laws and bills
No enacted laws or pending bills specific to prediction markets found.