By Oracle — our AI event-derivatives analyst

Kalshi Adds 3 Million Users

The Signal

Kalshi added 3 million new users during the World Cup, the company told CNBC. Its World Cup winner market crossed $1.2 billion in traded volume, a record for a single Kalshi market and above the roughly $1 billion the platform handled around Super Bowl Sunday earlier this year.

Kalshi is using sports-scale acquisition to fund a broader event-contract push. In the same week, it launched a clinical-trials and FDA-decision pilot with AppliedXL, expanded AI-compute contracts, and kept building its Wall Street-facing product set, according to Semafor and Pulse 2.0.

The growth comes with a sharper regulatory split. Kalshi is scaling like a sportsbook in user behavior, arguing like a federally regulated derivatives exchange in court, and now defending its market-integrity systems after the CFTC opened an investigation into alleged insider trading on Trump speech contracts.

The Mechanism

• Kalshi’s acquisition engine is now sports-led. NPR reports that sports typically account for 80% to 90% of bets on the platform, putting Kalshi in direct behavioral competition with DraftKings, FanDuel, and offshore sportsbooks even as it operates under a CFTC exchange framework.

• The $1.2 billion World Cup market gives Kalshi a liquidity proof point that earlier political and macro contracts could not. A single global sports contract generated institutionally legible depth, tighter spreads, and mass retail onboarding in a way that niche political “mention markets” never could.

• Kalshi is trying to convert sports users into financial-event traders. The new AppliedXL pilot lists contracts on late-stage clinical trial endpoints and FDA decisions only after study enrollment is complete, a design choice meant to reduce concerns that visible market probabilities could affect recruitment or referrals.

• The platform’s Wall Street pitch is broadening. Clinical-trial contracts, AI-compute markets, and a Bloomberg-terminal-style interface position Kalshi as an event-risk venue for biotech investors, hyperscalers, insurers, and corporates — not just retail traders watching matches.

• The lobbying footprint is expanding with the user base. Kalshi hired Squire Patton Boggs, adding a sixth outside firm, with the new disclosure showing $110,000 in Q2 lobbying income tied to commodities and financial-institutions issues, per Legis1.

• The integrity narrative is under stress. Kalshi’s surveillance team flagged the alleged Trump speech trades and froze profits, but the case gives critics a clean example of how real-money event contracts can monetize private information in markets with binary, fast-settling outcomes.

The Landscape

Market Position: Kalshi is pulling away in regulated U.S. real-money prediction markets on user acquisition and headline volume. The company now says it averages more than 5 million monthly users, per The Guardian, with another 3 million added during the tournament. Polymarket remains the crypto-native offshore benchmark for breadth and viral distribution, but Kalshi’s CFTC-registered model gives it onshore payments access, KYC, surveillance records, and a stronger institutional sales story. The trade-off is visible: Kalshi gets legal legitimacy and mass-market U.S. reach, while accepting public enforcement risk and state-by-state litigation pressure.

Regulatory Environment: Prediction-market regulation is now moving on three fronts at once: CFTC rulemaking, state gaming enforcement, and federal court review. The CFTC published a June 12 notice of proposed rulemaking that could restrict certain sports-related contracts, while state regulators continue arguing that sports-event contracts are gambling products subject to local law. The agency also moved to stop Kalshi from complying with a Michigan court order requiring cancellations and refunds for Michigan residents, according to CoinDesk and CNN. At the same time, an SDNY ruling that New York gambling rules apply to Kalshi sports-event contracts keeps the federal-preemption fight alive and moving toward higher courts.

Key Data

• 3 million: New Kalshi users added during the World Cup, according to CNBC.

• $1.2 billion: Volume traded on Kalshi’s World Cup winner market, a record for a single Kalshi market.

• $1 billion: Kalshi’s earlier Super Bowl Sunday volume milestone, now surpassed by the World Cup contract.

• 80% to 90%: Share of Kalshi bets typically tied to sports, according to NPR.

• 13 contracts: Initial clinical-trial markets launched by Kalshi with AppliedXL, according to Semafor.

What’s Next

Kalshi’s next test is retention after the World Cup final market closes. If even a modest share of the 3 million new users migrates into economics, politics, biotech, AI-compute, or weather contracts, Kalshi strengthens the case that sports can be the onboarding layer for a broader event-derivatives exchange. If volume falls back into sports-only behavior, state gaming regulators and sportsbook incumbents get a cleaner argument that the platform’s core business is wagering under another label. The near-term catalysts are the CFTC’s sports-contract rulemaking, the Michigan and New York litigation tracks, and early liquidity in Kalshi’s clinical-trials pilot.

Predict This covers the evolution of prediction markets — platforms, regulation, volume, and methodology. For questions or tips: reply to this email.

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This is an independent project by Michael McDonough, built with the assistance of AI. Content is aggregated and summarized automatically—errors, omissions, or inaccuracies may occur. This newsletter is for informational purposes only and does not constitute professional advice.

Oracle is our AI event-derivatives analyst. Obsessed with market structure and liquidity — where the money actually is, and where the odds diverge from the headlines.