Kentucky has filed a lawsuit against prediction market platforms Polymarket and Kalshi, along with Kalshi's financial partners Coinbase, Robinhood, and Webull, over the sale of sports event contracts to state residents. The suit argues the contracts amount to illegal gambling under Kentucky law.
Why the state filed suit
The legal action, brought by the Kentucky attorney general's office, targets the platforms' sports prediction products. These contracts let users bet on the outcomes of games and matches. The state contends the offerings are not legitimate financial instruments but unregulated gambling operations. Kentucky permits betting only through licensed horse racing and a state lottery. The lawsuit seeks a court order to block the companies from selling such contracts in Kentucky and asks for penalties.
Who's named in the complaint
In addition to Polymarket and Kalshi, the lawsuit names three companies that partner with Kalshi: Coinbase, Robinhood, and Webull. These firms provide access to Kalshi's exchange, allowing users to trade sports event contracts. The suit alleges they knowingly assisted in offering illegal bets to Kentucky users.
What sports event contracts are
Sports event contracts are a type of prediction market. Users buy a contract that pays out if a specific event happens — for example, a particular team winning a game. Kalshi and Polymarket both offer such contracts on a range of sporting events. Proponents argue they are legal derivatives similar to futures. But states like Kentucky view them as sports betting, which is largely illegal outside of regulated venues.
The platforms operate in a regulatory gray area. Kalshi is registered with the Commodity Futures Trading Commission, while Polymarket is a decentralized platform based on blockchain. Both have faced scrutiny from federal regulators. The Kentucky lawsuit is the latest front in the battle over prediction markets.
Next steps in court
The case has been filed in Kentucky state court. The defendants have not yet filed a response. The state is asking the court to permanently stop the sale of these contracts in Kentucky and to impose financial penalties. A ruling could set a precedent for how other states treat prediction markets. The companies may also face similar legal challenges elsewhere as regulators watch this case closely. Neither Kalshi, Polymarket, nor the named partners have publicly commented on the suit. For now, Kentucky residents can still access the platforms, but that could change if the court grants an injunction.
