DraftKings Predictions Hits $1.3B Annualized Consumer Volume in May; Railbird DCM and Combos Reshape the Competitive Field
DraftKings reported in an 8-K filing on June 9, 2026 that DraftKings Predictions ran $1.3 billion in annualized consumer volume in May, +24% month-over-month, with $3.1 billion in annualized total volume. The company is investing $200-300 million in prediction markets in 2026 and will launch its own DCM (Railbird), in-house exchange technology, and a Super App before year-end.
DraftKings disclosed in an 8-K filing on June 9, 2026 that DraftKings Predictions ran $1.3 billion in annualized consumer volume in May 2026, a 24% month-over-month increase. Total annualized volume (consumer plus market-making flow) reached $3.1 billion, up 34% over April. The product launched in December 2025; six months later it is operating at a run rate that puts it within an order of magnitude of Kalshi's current weekly volume. April was itself a record month: $1B+ consumer volume and $2.3B+ total volume, both up 38-43% over March. The growth curve is not yet flattening.
The 8-K matters less for the May numbers themselves than for what it signals about DraftKings' strategic posture. CEO Jason Robins told the Q1 earnings call the company will invest $200-300 million in its predictions offering in 2026 and explicitly framed it as the wedge for entering new states. Three product launches anchor the roadmap: Railbird, DraftKings' own Designated Contract Market license application; an in-house exchange technology stack including a futures commission merchant and a derivatives clearing organization; and a Super App merging sportsbook, iGaming, lottery, and predictions into a single nationwide front-end with state-specific feature gating. Railbird specifically is the move that takes DraftKings out of the customer-of-Kalshi role and into a direct CFTC-regulated competitor.
The Combos product launched in May is the under-rated wedge. Combos let users link two event contracts (a Phillies run line and a Knicks/Spurs total, in the company's own example) into a single trade with a multiplied payout. Mechanically this is the prediction-market translation of the same-game parlay, which is the single most important sportsbook product of the past five years. Kalshi has not launched a comparable feature; Polymarket cannot under its current AMM-pool architecture. If Combos drives volume the way SGPs drive sportsbook revenue, the competitive map changes. DraftKings is also alone in offering the integrated retail experience — a customer using DraftKings can shift between licensed sportsbook (state-regulated), iGaming (state-regulated), and event contracts (CFTC-regulated) without changing apps. That bundling is something neither Kalshi nor Polymarket can replicate without state gaming licenses they have explicitly avoided seeking.
Our read on what this does to the field. The Kalshi-vs-Polymarket framing that dominated 2024-2025 coverage is now incomplete. By Q4 2026 the field looks like Kalshi (CFTC-native, highest sustained weekly volume), Polymarket (on-chain advantage, expanding institutional pipeline via FalconX), Robinhood (26M-user distribution, MIAXdx DCM), and DraftKings (bundled retail experience, own DCM via Railbird, Super App distribution). Two-platform comparisons made sense when DraftKings Predictions was a re-skinned Kalshi white-label and Robinhood was a small slice of total volume. Both assumptions are out of date. The CFTC's pending OMB rule and the six federal state-preemption cases will determine the regulatory frame this all plays out in; the volume numbers will determine who has the most leverage when those rulings come down. DraftKings posting a six-month launch-to-$1.3B trajectory while announcing a $300M annual investment puts it among the operators that get to influence the regulatory outcome, not just live inside it.
Operators mentioned in this article
Recent updates
Kalshi Suspends Congressional Candidate for Trading on Own Race — Senate Already Banned Members
Kalshi disclosed on August 31 that it suspended North Carolina congressional candidate Laurie Buckhout for three years and fined her $2,589 for trading on her own race — the first publicly known enforcement action against a candidate for prediction market insider trading. Kalshi said it found multiple politicians trading on races they were involved in, including former Congressman George Santos. The Senate had unanimously banned its members and staffers from prediction market trading on April 30. CNN published a major feature on September 24 documenting election officials' concerns about disinformation and insider trading risk from prediction markets as the midterms approach.
Pew Research: Prediction Market Volume Doubled May-July, Sports Now Largest Category
A Pew Research Center analysis published September 23 found that combined monthly trading volume on Kalshi and Polymarket more than doubled from May to July 2026 — rising from $26 billion in May to $53 billion in July — driven primarily by sports contracts. Sports is now the largest trading category on both platforms. During the FIFA World Cup in June and July, Kalshi's monthly sports volume reached $58 billion. Over the same period, Americans wagered roughly $40 billion at licensed sportsbooks — suggesting prediction market sports volume has approached or exceeded licensed sports betting in dollar terms.
Democrats Now 60% Senate, 90% House Favorites on Prediction Markets — Biggest Shift Since 2024
Prediction markets on Kalshi and Polymarket have moved decisively toward Democratic control of both congressional chambers in the 2026 midterms. Democrats are priced at approximately 60% to win Senate control (Republicans 40%) and roughly 90% to win House control as of September 21. Republicans had been at 80%+ in Senate control markets when the market opened in November 2024. The shift began in February 2026 following the Iran war and has accelerated through fall as rising gas prices pushed Trump's approval ratings lower. More than 500 active midterm markets are live across Kalshi and Polymarket combined.