In September 2025, Massachusetts Attorney General Andrea Campbell filed a lawsuit against Kalshi, a prominent prediction market platform, alleging that it is illegally offering sports betting without the necessary licenses. This lawsuit has significant implications for the future of sports wagering in the state and raises questions about the regulatory landscape for prediction markets.
Background of the Lawsuit
Kalshi, founded in 2018 by MIT graduates, operates an online trading platform where users can purchase “event contracts” that allow them to wager on the likelihood of specific outcomes. The platform has gained traction, reportedly making more money from sports wagers than licensed sportsbooks like DraftKings and FanDuel during certain periods. The lawsuit claims that Kalshi’s operations constitute illegal sports betting under Massachusetts law.
Key Allegations
The lawsuit outlines several key allegations against Kalshi:
- Illegal Sports Betting: The state argues that Kalshi’s event contracts are essentially moneyline wagers, which are classified as sports wagering under Massachusetts law.
- Financial Risks: Attorney General Campbell emphasized the potential for significant financial losses and public health risks associated with unregulated gambling.
- Failure to Obtain Licenses: Kalshi is accused of operating without the required licenses from the Massachusetts Gaming Commission, exposing residents to various harms.
Kalshi’s Response
In response to the lawsuit, Kalshi has stated that it is a federally regulated financial exchange designated as a Designated Contract Market (DCM) by the Commodity Futures Trading Commission (CFTC). The company argues that its operations are legal and that Massachusetts is attempting to stifle innovation by enforcing outdated laws. Kalshi has also indicated plans to move the case to federal court, asserting that federal law supersedes state regulations in this context.
Implications for the Future
The outcome of this lawsuit could set a precedent for how prediction markets are regulated in Massachusetts and potentially across the United States. If Kalshi is forced to cease operations in Massachusetts, it may impact other states considering similar platforms. Additionally, the case raises broader questions about the intersection of state and federal laws regarding gambling and prediction markets.
Conclusion
The Kalshi lawsuit highlights the ongoing tension between innovation in financial markets and regulatory frameworks designed to protect consumers. As the legal battle unfolds, stakeholders in the sports betting industry will be closely watching the developments in this case.
Attorney Blair E. Weigand — Helping those with legal questions for 35 years and counting.