MGCB secures Polymarket agreement to end Michigan sports contracts

Michigan's Gaming Control Board (MGCB) said QCX LLC, which trades as Polymarket US, has agreed to stop offering new contracts linked to sporting events to customers in Michigan and to close any positions still open by the end of 25 November 2026, US Eastern time. The agreement was approved by the US District Court for the Western District of Michigan.

Under the terms, Polymarket US will halt new sports-event contracts in Michigan and close all open contracts held by residents of the state that customers have not closed themselves by the 25 November deadline. In return, the state committed not to bring enforcement action against Polymarket US, provided the company meets the obligations in the agreement.

The MGCB said the agreement is the latest in a series of actions taken in Michigan this year against unlicensed operators offering sports-betting products presented as federally regulated prediction markets. It follows similar agreements reached with Coinbase Financial Markets, Inc. and Robinhood Derivatives, LLC, and a preliminary injunction obtained in state court against KalshiEX LLC.

Henry Williams, executive director of the MGCB, said the addition of Polymarket to Kalshi, Robinhood and Coinbase in stepping back from these unauthorised sports contracts showed that Michigan's approach was working. He said all operators were expected to respect Michigan's regulatory framework, and that anyone wanting to offer sports betting to Michigan residents must hold a licence issued by the state.

In March 2026, Polymarket US sued state authorities in a federal court, seeking to stop Michigan from applying its gambling laws. The court rejected a request for a temporary restraining order in March and in June 2026 rejected a request for a preliminary injunction. Polymarket's appeal against that decision is pending before the US Court of Appeals for the Sixth Circuit.

On 10 September, the Michigan Department of Attorney General told Polymarket US it would take legal action if the company did not stop offering sports-event contracts to residents of the state. Michigan has obtained agreements or court orders blocking sports-event contracts offered by Kalshi, Robinhood, Coinbase and Polymarket. The attorney general's office and the MGCB said they are continuing their joint action to ensure sports betting in Michigan is offered only by licensed, regulated operators.