MGCB says Polymarket US will stop offering sports contracts in Michigan

The Michigan Gaming Control Board said on 28 October 2026 that QCX LLC, which trades as Polymarket US, has agreed to stop offering new contracts linked to sporting events to residents of Michigan and to close all remaining positions by 25 November 2026. The agreement was approved by the US District Court for the Western District of Michigan, according to the MGCB.

Under the terms, Polymarket US will stop offering new contracts on sporting events to customers in the state. The company must also close all contracts still held by Michigan residents that customers have not settled voluntarily by the end of 25 November 2026, Eastern time. In return, state authorities agreed not to take sanctions action against Polymarket US provided the company keeps to the commitments.

The dispute dates to March 2026, when Polymarket US began proceedings in federal court to stop state officials from applying local gambling law to it. The court rejected the company's request for a temporary restraining order in March 2026, and in June of the same year it also rejected the operator's application for a preliminary injunction. Polymarket US has appealed that decision, and the appeal is pending before the US Court of Appeals for the Sixth Circuit.

On 10 September 2026, the Michigan Department of Attorney General notified the company of its intention to bring legal action if it did not stop offering contracts on sporting events to state residents.

Henry Williams, executive director of the MGCB, said the fact that Polymarket was joining Kalshi, Robinhood and Coinbase in withdrawing from these unauthorised sports contracts showed that Michigan's approach was working. He said all operators were expected to comply with the state's regulatory framework, and that anyone wanting to offer sports betting to state residents must obtain a Michigan licence.

Michigan Attorney General Dana Nessel said that one after another, from Kalshi to Robinhood and Coinbase and now the agreement with Polymarket, the authorities were making national sports betting operators comply with Michigan law. She said that together with the MGCB, the state was protecting Michigan residents by ensuring that gambling activity in the state took place through authorised and regulated operators, with the safeguards and guarantees provided by law.

The agreement follows similar arrangements reached with Coinbase Financial Markets, Inc. and Robinhood Derivatives, LLC, and a preliminary injunction obtained in a state court against KalshiEX LLC. With the Polymarket US agreement, Michigan has obtained agreements or court orders stopping the offering of contracts linked to sporting events by Kalshi, Robinhood, Coinbase and Polymarket. The Attorney General's office and the MGCB confirmed that joint monitoring and enforcement against unauthorised offerings will continue, with the aim of ensuring that sports betting to Michigan residents is offered only through operators holding the licences required under state law.