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Court Orders Prediction Market Website to Cease Operations in Mass.

By Tom Marino | January 21, 2026
Last Updated: January 21, 2026

BOSTON – The office of Massachusetts Attorney General Andrea Joy Campbell announced on Tuesday, Jan. 20, that a court issued a preliminary injunction prohibiting Kalshi from accepting online wagers on sports and related events from Massachusetts customers until the company complies with state laws governing sports gaming. That includes licensure by the Massachusetts Gaming Commission (MGC).

Kalshi describes itself as “a regulated exchange & prediction market where you can trade on the outcome of real-world events.”

“The Court has made clear that any company that wants to be in the sports gaming business in Massachusetts must play by our rules – no exceptions,” said Campbell. “Today’s victory marks a major step toward fortifying Massachusetts’ gambling laws and mitigating the significant public health consequences that come with unregulated gambling.”

Campbell sued Kalshi in September alleging the company is violating state law. The court also denied a motion to dismiss the lawsuit on Tuesday.

The lawsuit alleges that Kalshi uses an online “exchange” to offer sports wagering under the guise of “event contracts,” which allow bettors to place wagers connected to sports, such as the likelihood of a certain team winning a game or a certain player scoring a particular number of points.

According to the attorney general’s office, the Kalshi platform offers “event contracts” on sporting events, including moneyline contracts, point spread contracts, and over-under contracts.

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