Baltimore has sued Kalshi and Polymarket, arguing the prediction platforms are running unlicensed sports betting under a fintech label.
- Sports contracts at the center
- Coinbase, Robinhood, Webull named in Kalshi case
- Derivatives vs. gambling fight
- State licensing, consumer protection, and federal preemption collide
Mayor Brandon Scott and the Baltimore City Council filed the complaints Thursday in Baltimore City Circuit Court, saying Kalshi and Polymarket are making sports event contracts available without the licenses required for sports wagering. Baltimore says the contracts cover game winners, point spreads, individual player performances, and “combos” that the city argues work much like parlays. For background on how these products are defined, the [Understanding Prediction Markets and Event Contracts] page from the CFTC lays out the basic framework, while a broader [prediction market] definition helps explain why regulators keep tripping over this category.
That sounds like a local consumer-protection fight, but it is really part of a much bigger legal brawl: are these products federally regulated derivatives, or are they gambling products that states can police under local law?
Kalshi’s answer is the first one. Baltimore’s answer is the second. And for now, nobody has managed to bury the other side under a pile of clean legal certainty.
The Kalshi complaint goes beyond Kalshi Inc. and KalshiEX LLC. Baltimore also names Robinhood Markets, Robinhood Derivatives, Webull Corporation, Webull Financial, and Coinbase Financial Markets, saying those firms help distribute the contracts to retail users. The separate Polymarket complaint names QCX LLC, Blockratize Inc., and QC Tech LLC. A related report from [Kalshi, Polymarket sued by Baltimore over sports event] put the spotlight on just how fast this fight is spreading beyond one city and one exchange.
The city is seeking maximum statutory penalties, customer restitution, disgorgement of proceeds, and an order blocking unauthorized sports betting in Baltimore. It also brought eight counts alleging deceptive and unfair trade practices in the Kalshi case. Another local legal breakdown, [Baltimore sues Kalshi and Polymarket for offering] unlicensed sports betting, makes the city’s position plain: this is not a cute semantic dispute, it is a direct challenge to a business model.
“These companies are running sportsbooks without licenses and betting that a new label will put them above the law, ” Scott said. “It won’t.”
“Kalshi and Polymarket cannot circumvent Baltimore’s consumer protections by repackaging gambling as something else or claiming federal regulation puts them beyond the reach of our laws, ” City Solicitor Ebony Thompson said.
Kalshi pushed back, saying users choose its markets because they are legitimate, regulated venues rather than disguised betting shops.
“People use regulated prediction markets like Robinhood, Kalshi and CME because they’re neutral, fair and transparent marketplaces, ” a Kalshi spokesperson said.
“If the Mayor has genuine concerns about guardrails, we’re always happy to chat, ” the spokesperson said.
“In the meantime, we will defend these claims in court.”
That is the basic clash in plain English. Kalshi says it operates as a federally regulated designated contract market under Commodity Futures Trading Commission oversight, and that sports-linked event contracts fall within that framework. Baltimore says the product type does not matter nearly as much as the economics: if users can trade on winners, spreads, and player props, then the thing behaves like sports betting, no matter how many compliance buzzwords are slapped on top.
The distribution angle is where this gets more interesting, and more dangerous for the platforms involved. Baltimore is not just pointing at the exchanges. It is also naming the consumer apps and trading intermediaries that put these contracts in front of mainstream users. That matters because Robinhood, Coinbase, and Webull can make a niche derivatives product feel a lot more like one-tap betting for the masses than a specialized financial instrument.
In the Wisconsin dispute, court filings said Robinhood customers place orders through Robinhood’s interface while trades are executed on Kalshi’s exchange. The Wisconsin complaint also said Coinbase gives customers access to Kalshi-listed contracts through its own platform. Baltimore is clearly betting that those distribution links are enough to pull the retail platforms into the fight. A separate report on [Baltimore sues prediction markets as 4th Circuit weighs] shows the legal backdrop is already crowded, with higher courts circling the same issue.
Why this dispute is spreading
Baltimore is not the first government to go after this category. Kentucky filed a similar case in June against Kalshi and Polymarket, also naming Coinbase, Robinhood, and Webull. Wisconsin filed a lawsuit in April targeting Kalshi, Polymarket, and Crypto.com, alongside Coinbase and Robinhood. Kentucky’s case is especially notable because of the wider federal response, as seen in the report on [CFTC Sues Kentucky Over Sports-Event Contracts], which shows the federal-state clash is no longer theoretical.
The CFTC then sued Kentucky in a separate federal action, underscoring how tangled the jurisdiction fight has become. This is not one judge, one state, or one company. It is a multi-front battle over whether sports-related event contracts belong under federal derivatives law or state gambling law.
That split is the whole ballgame. Kalshi’s view is that if the CFTC oversees the exchange, local licensing rules should not control the product. Baltimore and other states argue that a federal label does not magically wash away the fact that these contracts look and function like bets on sporting outcomes. For a broader breakdown of the federal-state clash, [Trump Backs Prediction Markets as CFTC, States Clash Over] lays out how quickly the politics around these markets have hardened.
And honestly, that is not a crazy reaction. If a market lets people trade on game winners, point spreads, and player performances, regulators are going to notice the sportsbook-shaped elephant in the room.
Consumer protection is the real wedge
Baltimore is not relying only on the gambling argument. It says the platforms violated the city’s Consumer Protection Ordinance by offering sports contracts without the licenses required for sports wagering. That turns the case from a pure licensing dispute into a broader claim that the companies used a misleading structure to sidestep local rules.
The city also argues that licensed sportsbooks in Maryland must follow stricter requirements, including a minimum age of 21, while Kalshi and Polymarket allow users as young as 18. If that is accurate, it gives Baltimore a very practical talking point: why should a licensed sportsbook play by tighter rules while a prediction platform offers a similar experience with looser ones?
That kind of mismatch tends to attract regulators like blood in the water. It is one thing to argue about derivatives theory in a law journal. It is another to tell a city it has to tolerate a product that looks like sports betting but skips the guardrails, taxes, and licensing that the rest of the industry must absorb. The legal fight has already spilled into other states too, as captured in [CFTC Sues States Over Prediction Markets: Kalshi], which shows how messy this gets once everyone starts filing papers in different courthouses.
Polymarket adds a structural wrinkle
The Polymarket complaint also points toward something more technical: corporate structure and market design. Baltimore names QCX LLC, Blockratize Inc., and QC Tech LLC, suggesting the city is looking beyond branding and into the machinery behind the platform.
That matters because the legal fight is not only about what the product is called. It is also about how it works. If a platform can effectively function like a sportsbook while presenting itself as a marketplace, regulators will argue that the label is just camouflage.
Prediction markets are not automatically a scam or a casino with better PR. They can be useful for forecasting and price discovery, and they do provide a cleaner alternative to the swamp of offshore betting sites that exist purely to separate degens from their money. But once the product leans hard into sports outcomes, the line between forecasting and gambling gets very thin, very fast. That is why the recurring reference to [Understanding Yahoo's Consent Page] matters here only in the sense that mainstream finance media is now getting dragged into the same messy conversation about what these markets really are.
The money is real, which is why the lawsuits keep coming
This is not a tiny niche that can be ignored. In June, sports demand during the FIFA World Cup helped push Kalshi’s weekly trading volume to $5.1 billion, and the source notes that daily market volumes reached as high as $4.8 billion. Sports-related contracts became Kalshi’s largest product category.
Bernstein also estimated in June that Robinhood could generate $586 million in prediction market revenue during 2026, compared with $150 million in 2025. Those are not rounding errors. They are proof that the category is becoming commercially meaningful, which is exactly when regulators stop shrugging and start sharpening the knives.
Kalshi also reported that it deployed an internal AI system to help evaluate potential new markets. That may sound efficient, but it does not solve the core issue: if the underlying product is legally suspect, better market screening just means you can scale a problem faster.
The broader point is simple. Once prediction markets turn into a real revenue stream for major consumer platforms, the legal fight gets harder, more expensive, and less forgiving. Nobody writes cease-and-desist letters over pocket change. Even the policy chatter around this space is getting broader, with pieces like [Congress Moves to Ban Lawmakers From Trading on Polymarket] showing that lawmakers are already worried about conflicts, incentives, and the potential for abuse.
Why this matters beyond Baltimore
What happens next could shape how sports-related event contracts are treated nationwide. If Baltimore persuades a court that these products are sports betting in all but name, then the model gets a lot harder to run through mainstream retail apps without state gaming licenses.
If Kalshi wins the broader argument, prediction markets could keep expanding as federally regulated products even when the contracts track sports outcomes. That would be a major win for the market-first crowd and a headache for state regulators who would rather not watch a federal wrapper swallow local gambling rules whole.
Either way, the case is more than a local enforcement action. It is part of a much larger tug-of-war over whether prediction markets are genuine financial innovation, or just sports betting wearing a cleaner shirt.
Key takeaways
-
What did Baltimore sue over?
Baltimore sued Kalshi and Polymarket over sports-linked event contracts the city says amount to unlicensed sports betting and deceptive trade practices. -
Why are Coinbase, Robinhood, and Webull named?
Baltimore says those platforms help distribute the contracts, so they are not just bystanders. The city is trying to reach the retail channels, not only the exchanges. -
What is the core legal fight?
The dispute is whether sports event contracts are federally regulated derivatives or gambling products that states and cities can regulate under local law. -
Why does the age issue matter?
Baltimore says Maryland sportsbooks must follow stricter rules, including a 21-and-over age limit, while these platforms allow users as young as 18. That makes the products look even more like gambling to regulators. -
Why is this bigger than Baltimore?
Kentucky and Wisconsin have already taken similar action, and the CFTC has responded with federal lawsuits of its own. The outcome could shape the future of prediction markets across the U.S. -
Why should crypto readers care?
Prediction markets sit right on the border between finance and gambling, and they are being pushed through familiar crypto-friendly retail apps. That makes them a test case for how much regulatory arbitrage the system will tolerate before it bites back.
Kalshi and Polymarket will keep arguing that they are building neutral, transparent markets under federal oversight. Baltimore says that is just a polished way of selling sportsbooks without the paperwork.
That dispute is now headed through the courts, where labels will matter less than structure, incentives, and who actually has the power to regulate the product. In crypto and prediction markets, the truth tends to show up right after the marketing copy runs out.
