TLDR Ohio’s casino regulator warned sports betting licensees that serving prediction markets could hurt their license suitability. Licensees and applicants must confirm compliance with the notice by October 30. Ten firms, including Coinbase, Robinhood and Polymarket, were ordered to stop offering sports contracts in Ohio by October 16. Polymarket sued Ohio in federal court, saying the order violates the Commerce Clause and federal law. Governor Mike DeWine has reportedly told the attorney general to begin suing firms that have not complied.
Ohio’s gambling regulator has warned its sports betting licensees that working with prediction market companies could put their licenses at risk. The message comes as Polymarket takes the state to federal court.
The Ohio Casino Control Commission sent the notice to sports betting and fantasy contest licensees and applicants. It asks them to confirm they are following the rules by October 30.
Interim executive director Andromeda Morrison shared the update with the seven-member Commission on Wednesday. She said companies that keep supporting “unregulated and unlicensed gaming through prediction markets” may hurt their future suitability.
What the Notice Says
The notice targets companies that provide services to firms offering sports-event contracts in Ohio without a state license. These services include liquidity, market making, integrity monitoring, equipment, data security and other technology work.
The Event Horizon newsletter first reported the notice. The Commission said it was deeply concerned by reports that some licensees still work with unlicensed operators.
According to the notice, supporting illegal gambling reflects on a licensee’s character and reputation. It also said that “maintaining suitability is a continuing obligation of licensure.”
Morrison said the notice follows earlier guidance the Commission issued in August 2025. She said the agency has long held that prediction markets offering sports contracts operate outside Ohio law.
The U.S. Court of