Michigan to Stop Polymarket's Sports Betting Contracts

The Michigan Gaming Control Board (MGCB) announced that Polymarket will stop offering sports event-based contracts in the state through the end of November 25, 2026. The board had long pressed the company, alleging that the platform violated Michigan gambling laws.

The allegation also gained support in court. The board had won a preliminary injunction against Kalshi, and that decision paved the way for the board to take action against other companies as well. Coinbase agreed to stop its sports event contracts on October 10. Robinhood had reached an agreement earlier, on September 9, and closed its operations in this area on October 9.

State Attorney General Dana Nessel described the development as a step that forces the national sports betting industry to comply with Michigan law. Nessel said the goal is to protect state residents in a licensed and regulated gambling environment.

Polymarket US, however, tried to block the state from enforcing its gambling laws. It was unable to get its defense accepted in court. The company said it will comply with the successive rulings, including the process in which the Sixth Circuit Court of Appeals upheld the lower court decision.