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New York Lawsuit Against Kalshi Raises Stakes of Dispute Over Event Contract Trading

Legal Writer

Publish Date: Aug 03, 2026

Fact checked by: Matt Moreno

Key Points

New York has sued Kalshi in state court over alleged illegal gambling
Lawsuit threatens Kalshi’s access to state’s population and revenue
Kalshi has asked a federal court to intervene on its behalf

New York Attorney General Letitia James has sued Kalshi in state court over allegations of operating an illegal gambling ring. The complaint seeks a court order stopping Kalshi from offering several categories of event contracts in the state and a minimum of $36 billion in damages.

The Commodity Futures Trading Commission and Kalshi have responded by removing the case to federal court and asking the U.S. District Court for the Southern District of New York to enjoin James from continuing with the case. Those actions could turn out to be nothing more than delay tactics, but considering the escalation in stakes that James’ lawsuit represents, playing for time could be Kalshi’s best course of action at this point.

Photographer: Gabby Jones/Bloomberg via Getty Images

James’ lawsuit represents unprecedented action against prediction market exchanges

Several U.S. states have sued Kalshi and/or Polymarket and others for allegedly violating their gambling laws. This case in New York represents an escalation on multiple fronts, though.

Unlike cases in Massachusetts and Wisconsin, James’ complaint doesn’t just target Kalshi’s offering sports event contracts. As a press release from James’ office denotes, the suit involves contracts on culture, politics, and sports.

The New York lawsuit is also a significant escalation in financial terms. No other state government has specified damages in such a large amount as a minimum of $36 billion, which represents $14 billion more than Kalshi’s last valuation.

If ultimately successful, the results could have significant effects on Kalshi.

Potential ramifications of New York’s case against Kalshi

A judgment of over $36 billion in New York’s favor could bankrupt Kalshi. However, there are other consequences that could be significant for Kalshi even if it avoids financial ruin.

If the court grants James’ request for an injunction barring Kalshi from offering culture, politics, and sports contracts in New York, that could mean significantly less volume on Kalshi’s markets. New York is home to the most populous city in the United States and while Kalshi offers contracts on economics and weather events, the three categories named in the lawsuit represent the vast majority of trading on its platform. For these reasons, the Commodity Futures Trading Commission and Kalshi have moved quickly.

CFTC, Kalshi pull legal levers

The U.S. Commodity Futures Trading Commission (CFTC) and Department of Justice (DOJ) sued New York over an earlier cease-and-desist order in April, but James’ lawsuit prompted a new filing in that case. The CFTC/DOJ have asked the Southern District of New York for a temporary restraining order barring James from moving forward with the suit against Kalshi.

Meanwhile, Kalshi has removed James’ case against itself to the same court, but James has filed an emergency petition to have the case remanded back to state court. The odds of the complaint being remanded to state court are strong, but that process will take a few weeks.

That time could prove to be on Kalshi’s side.

Why a delay could be a difference-maker for Kalshi

While judges for the Southern District of New York are processing James’ petition to remand the case against Kalshi back to state court, the court will also be considering the CFTC’s emergency motion for a temporary restraining order (TRO). The removal gives those judges time to consider that motion from the CFTC and possibly grant it.

Even if that does not happen, the CFTC could still have time to appeal to the U.S. Second Circuit Court of Appeals for an emergency TRO against New York. Either option would curtail James’ case against Kalshi on a temporary basis, perhaps long enough to get definitive answers on the pertinent legal questions from the U.S. Supreme Court.

If the Southern District of New York and the Second Circuit both deny the CFTC’s motion for a TRO, though, Kalshi may have to face the lawsuit in state court. The stakes in that action are the highest of any litigation involving prediction market trading to date in the U.S.

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