Third Circuit sided with Kalshi, but five circuits have not

Tim Griffin filed a 57-page complaint on Wednesday, and the number that matters most in it is not the $36 billion New York wants or the $120,000 a day Nevada is seeking. It is 18.

Arkansas allows casino gaming and sports wagering only for people 21 and older. Kalshi accepts traders from 18. Traders in that gap — 18 to 20 years old — moved an estimated $5.4 billion on the platform through late August of this year. Griffin's filing notes that Kalshi recently added deposit limits, enhanced monitoring, and parent-linked accounts for that age group. The state's argument is that this is not responsible innovation. It is a gambling operator managing its exposure to a cohort it should never have been serving.

The preemption argument Kalshi has run successfully in the Third Circuit hits something harder here. Griffin isn't primarily arguing about whether event contracts are futures or gambling. He is arguing under the Arkansas Deceptive Trade Practices Act, and he is using Kalshi's own consumer-protection infrastructure against it. Self-exclusion tools. Problem gambling partnerships. Deposit limits. In Griffin's framing, those features don't distinguish Kalshi from a sportsbook — they confirm it. A derivatives exchange does not need a partnership with the National Council for Problem Gambling. A bookmaker does.

I have watched preemption arguments dissolve in court before, usually when the federal hook is real but the state has found a parallel theory that doesn't require challenging federal jurisdiction directly. Griffin appears to have done exactly that. Even if Kalshi is a lawfully designated CFTC contract market — which it is — operating a deceptive trade practice against Arkansas consumers is a state matter. The question is whether that framing survives a motion to dismiss, and I think it has a better chance than most of the state challenges that have come before it.

The circuit split is now the central structural fact in this market. The Third Circuit ruled that New Jersey cannot regulate Kalshi's sports contracts. The Sixth and Ninth Circuits sided with Ohio, Tennessee and Nevada. That divergence was always going to reach the Supreme Court eventually, but Kalshi's position has deteriorated since the Third Circuit win. Arkansas is now the seventh state to charge, sue, or restrict the platform. The CFTC has filed against at least ten states in response. That is a regulator fighting a war on ten fronts simultaneously while the company it is defending takes 82% of a $72 billion monthly market.

Kalshi's $40 billion valuation was priced on a scenario where federal preemption holds cleanly and state challenges collapse. Neither is happening on that timeline. What is actually happening is a prolonged multi-circuit contest that will cost the company money, management attention, and — if the age-access argument gets traction — something harder to price than legal fees.