Kalshi's IPO story now rests on two facts at once: its revenue has exploded, and the sports contracts driving that growth are exactly what state regulators want to stop.
Kalshi no longer looks like a clever niche exchange waiting for the world to notice it. It looks like a company trying to go public before the courts decide how much of its business can survive. When its annualized revenue was roughly $650 million last November, you could still call it an impressive fintech upstart. Six months later, The Information reported that the figure has crossed $2 billion, and the company is already having early conversations with investment banks about an IPO that isn't expected before late 2027.
That is fast. It is also messy.
The growth numbers make the case for why bankers are taking the meetings. Annualized trading volume has climbed from $52 billion to $178 billion over the past year. Institutional trading on the platform jumped 800% in the six months ended in early May. Kalshi commands more than 90% of US prediction market activity, and its $1 billion Series F round, led by Coatue, valued the company at $22 billion, double its January valuation. At about 11 times annualized revenue, Kalshi is being priced less like a consumer app and more like an exchange. That tells you what investors want it to become.
Sports have done much of the heavy lifting. NBA playoff contracts and World Cup markets brought in retail traders who may never have cared about event contracts before. May alone produced $16.81 billion in monthly trading volume, up from $14.81 billion in April. This isn't happening because prediction markets suddenly became fashionable. It's happening because sports fans found a federally regulated platform where they can trade outcomes and receive payouts quickly.
That is also the problem.
Kentucky Attorney General Russell Coleman filed suit against Kalshi and Polymarket in Franklin Circuit Court on June 17, alleging that the platforms are operating unlicensed sports betting businesses in violation of state consumer protection and gambling laws. His office said sports wagering made up 89% of Kalshi's contract volume during a 2025 sample period. Kalshi's answer is direct: the Commodity Futures Trading Commission regulates its contracts, so state gambling rules are preempted. That argument has real force, especially after Kalshi's recent win in New Jersey. But one adverse ruling against sports prediction contracts would hit the same revenue line that makes the IPO math work.
Kentucky is not acting in isolation. The Associated Press reported last week that a coalition including Kalshi, Crypto.com and Polymarket sued to block Kentucky's new 14.25% excise tax on prediction markets, arguing that the tax is unconstitutional and conflicts with federal law. Coleman has said he will defend it. So you now have two fights in the same state: one over taxation and one over whether these contracts are legal sports betting dressed up as derivatives. Any S-1 will have to spell that out in plain language.
The bigger signal this week came from Charles Schwab. As the Wall Street Journal reported, Schwab is partnering with Cboe Global Markets to offer yes-or-no style contracts on the S&P 500 to retail brokerage customers. Schwab's CEO Rick Wurster had criticized event contracts last year as blurring the line between investing and gambling. Now the firm with roughly 35 million active brokerage accounts is preparing its own version, built around financial benchmarks rather than sports or politics.
Frankly, that restraint is the whole strategy. Schwab and Cboe can enter the category without picking up Kalshi's legal baggage. If courts bless sports contracts, Kalshi has the faster-growing product. If courts restrict them, Schwab still has a clean financial-contracts business sitting inside an existing brokerage machine.
The fight is also spreading beyond state attorneys general. The Financial Times reported Friday that CME Group sued the CFTC over the regulator's approval of Kalshi's perpetual futures contracts, arguing that the agency bypassed proper procedures. That matters because CME isn't a state gambling regulator. It is one of the established derivatives venues Kalshi eventually wants to be measured against. When incumbents sue, you know the market is no longer being ignored.
Kalshi's approach to prospective bank advisers says the same thing. The company is not just asking for underwriters. It wants banks to integrate directly with its trading platform so institutional clients can access its markets. That is the posture of an exchange operator, not a startup hunting for distribution. Think CME Group or Cboe, not another brokerage app with a bright interface and a referral program.
Whether that vision survives intact depends on what courts do with sports contracts. The addressable market for event trading is plainly bigger than it looked two years ago, and $178 billion in annualized volume proves there is real demand. But a $22 billion valuation built heavily on sports volume is a different pitch from one built on diversified financial contracts. If Kalshi wants public-market investors to treat it like infrastructure, it has to show them that its infrastructure does not collapse when one state judge disagrees.
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