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Michigan regulator secures Polymarket shutdown of sports contracts

Enforcement & compliance1 min read

The Michigan Gaming Control Board said it worked with the state attorney general’s office to stop four prediction-market operators offering sports contracts. Polymarket agreed to shut its sports offerings and close open positions by 25 November, the board said.

Polymarket agreed to discontinue sports offerings and close outstanding positions by Nov. 25, the board said in late October.

MGCB executive director Henry Williams highlighted the regulator's work with the state attorney general's office to stop four prediction-market operators from offering sports contracts.

Earlier fines and penalties by MGCB

DateCompanyAmountStoryAppeal status
Kalshi, CoinbaseNot statedMGCB highlights enforcement against unlicensed sports-contract platforms in MichiganNot stated
PolymarketNot statedMichigan Gaming Control Board agreement requires Polymarket to end sports contractsNot stated
Not namedNot statedMGCB sends cease-and-desist letters to 33 offshore operatorsNot stated
Coinbase, RobinhoodNot statedCoinbase agrees to suspend Michigan prediction markets under MGCB dealNot stated
Not namedNot statedMichigan regulators order 33 offshore gambling operators to cease activitiesNot stated

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Polymarket US agrees to end Michigan sports contracts by 25 November

Polymarket US has agreed to stop offering new sports-related event contracts to Michigan customers and close residents’ remaining open positions by 25 November 2026, according to the report. A federal court approved the agreement, which the report says follows similar deals with Coinbase and Robinhood and a preliminary injunction against Kalshi.

Polymarket US will stop selling new event contracts related to sports to Michigan customers, and open positions held by residents of that state will be closed by November 25 2026. A federal court approved the agreement, which came after comparable deals with Coinbase and Robinhood and a preliminary injunction against Kalshi.

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