Polymarket US to Halt Sports Contracts in Michigan

Polymarket US has agreed to stop offering new sports event contracts in Michigan and to close open positions held by state residents by November 25, 2026. The agreement was reached with the Michigan Gaming Control Board. As long as the company complies with these terms, the state will not take enforcement action against it.

The Western District of Michigan federal court approved the agreement. Under it, customers may voluntarily close their positions before the deadline. Positions still open at the end of November 25 must be closed by Polymarket US itself.

MGCB Executive Director Henry Williams said Polymarket has, along with Kalshi, Robinhood and Coinbase, backed away from these unlicensed sports contracts. Williams said any operator that wants to offer sports betting to Michigan residents must hold a state license.

The agreement adds Polymarket US to the list of companies that have agreed to stop sports event contracts in Michigan or have been sued over them. The state previously reached similar agreements with Coinbase Financial Markets and Robinhood Derivatives, and obtained a preliminary injunction against KalshiEX.

Michigan Attorney General Dana Nessel said the state is applying its gambling laws to unlicensed sports contracts. Nessel said state agencies are ensuring that games are offered in a licensed and regulated manner to protect residents.