Kentucky Sues Kalshi, Polymarket and Coinbase Over Sports Bets

Kentucky Names Coinbase In Kalshi Suit

Kentucky’s announcement said the Kalshi lawsuit includes affiliates including Coinbase. The state alleged Coinbase has partnered with Kalshi to operate unlicensed sports gambling on its platform and that the two companies split the fee whenever a bet is made on Coinbase.

Those are allegations, not findings, and the cases still need to be tested in court.

The state also cited volume data to frame the size of the market. Kentucky said Kalshi saw nearly $23 billion in contract volume in 2025 and alleged 89% of that came from sports wagering. It also said sports betting made up about 70% of Kalshi trading volume during a selected sample period in 2025.

The Polymarket complaint gives a cleaner look at the state’s theory. In the filed complaint, Kentucky alleges Polymarket defendants are not licensed to offer online sports wagering in Kentucky and that their sports event contracts fall within the state’s definition of sports wagering.

That framing directly challenges the industry view that event contracts are financial products first. It also puts Coinbase in a more sensitive position because the exchange is already a central policy actor in Washington’s market structure fight.

CFTC Fight Widens Across States

The Kentucky cases are part of a broader national collision between state gambling regulators and the CFTC’s derivatives lane. CoinDesk reported that Polymarket said the action runs counter to the CFTC’s established framework and that the company looks forward to addressing the claims through the legal process.

The federal backdrop matters because Kalshi is already regulated by the CFTC, and Polymarket’s U.S. return has been tied to a federally regulated pathway. The platforms argue that event contracts sit under commodity derivatives oversight, while states argue that sports based contracts can still be gambling inside their borders.

CoinDesk reported that the CFTC has sued eight states and joined other court matters involving the sector, putting the regulator on a collision path with state attorneys general.

For crypto users, the practical question is access. A product can be technically available under a federal derivatives framework but still face state challenges over gaming law, consumer protection, tax treatment and responsible gambling controls.

Daily Crypto Briefs tracked a similar state pressure point this week when Illinois enacted a 0.2% digital asset tax on covered crypto business activity. State rules can reshape availability even when federal policy appears more open.

July 15 Law Raises Stakes

Kentucky’s next calendar marker is July 15, 2026. The attorney general’s announcement said the Wagering Consumer Protection Act takes effect that day and prohibits licensed sports wagering operations from contracting with Kalshi or Polymarket.

That date gives the cases a near term business consequence for sportsbooks, exchanges, payment partners and affiliates.

The lawsuits also land days after a coalition including Kalshi, Crypto.com and Polymarket sued to block Kentucky’s 14.25% prediction markets tax. AP reported that the coalition called the tax discriminatory and argued it is preempted by federal law.

Kentucky is now fighting prediction market operators on two fronts: defending a new tax and attacking sports linked contracts as illegal gambling.

The state said all three lawsuits allege violations of Kentucky’s Consumer Protection law, the Loss Recovery Act and the Commonwealth’s gambling laws.

The next useful signals are any temporary court orders in Franklin Circuit Court, public responses from Kalshi or Coinbase, and whether the CFTC takes action against Kentucky as it has against other states. Until then, Kentucky has turned the prediction market fight into a direct lawsuit naming some of crypto’s most visible U.S. platforms.