Kalshi seeks Supreme Court review after third circuit loss

Shayne Coplan built Kalshi on a single legal premise: that a federally licensed derivatives exchange could not be regulated by states as a gambling operation. Six federal judges have now disagreed with him. The Third Circuit's ruling this week — that states retain authority to regulate prediction markets operating within their borders — is not a procedural setback. It is a structural one, and Kalshi's decision to seek en banc review rather than pause its sports contracts tells you exactly how the company reads its own position.

The federal preemption argument was always more elegant than it was settled. The Commodity Exchange Act grants the CFTC jurisdiction over event contracts, but the Act has never been tested against state gambling statutes in a sports context at this scale. Kalshi's lawyers built the case that CFTC designation creates a kind of regulatory immunity — that a federally approved contract cannot simultaneously constitute illegal gambling under state law. The Third Circuit said that reading is wrong. So did the Sixth Circuit. So did the Ninth.

Three circuits is not a trend. Three circuits is a consensus, and consensus at that level tells you something about where the doctrine actually sits, as opposed to where one side's briefs say it should.

What makes Kalshi's position genuinely exposed is the sports contract specifically. Election markets and economic indicator markets operate at some distance from the gambling industry's traditional vocabulary. A contract on whether the Chiefs cover the spread does not. The moment Kalshi expanded into sports outcomes, it handed every state attorney general a filing that writes itself — and several of them have taken it. The CFTC's own guidance on what constitutes an "activity contract of limited commercial purpose" remains unwritten in any form a court has been willing to call definitive. That gap, which once looked like regulatory flexibility, now looks like the absence of a floor.

The en banc petition is the correct move legally, even if the odds against it are long. A case with three-circuit alignment and a Supreme Court petition already forming in the background — Robinhood and Crypto.com have both filed briefs urging the Court to take it — does not get reversed by a full panel of the Third Circuit. What it might do is sharpen the circuit split enough that the Supreme Court treats the case as a vehicle rather than a petition to deny. That is the real game Kalshi is playing: not winning en banc, but creating the conditions under which certiorari becomes easier to justify.

The reporting frames this as a regulatory setback. I don't think that is where it lands. This is a financing story dressed as a legal one. Kalshi's sports book is growing. The NFL season is live. Every week that Kalshi continues to operate those contracts while litigation proceeds is a week of volume, of user acquisition, of network effects that compound regardless of how the courts eventually rule. The company that wins on preemption in two years, after the Supreme Court grants cert, is a different company than the one that suspended sports contracts in September 2026 and lost the market to whoever filled the space.