EndGame: Analysis Suggests Just How Much Kalshi Is Impacting Sportsbooks

InGame The U. S. sports betting world moves quickly and unpredictably in 2026.

In order to properly take stock of it all, we offer InGame’s “EndGame,” an end-of-week compilation of the top storylines, some overlooked items, and all the other news bits from this past week that we found interesting . Putting numbers to Kalshi’s siphoning New data from Sensor Tower puts some numbers to the sportsbook operators’ concern that prediction markets such as Kalshi are eating away at their businesses. Per its “Kalshi Penetrates Sports Betting Market” report, the relative newcomer to sports options “has continued to amass market share at the cost of established sports betting platforms, garnering a whopping 21% MAU (monthly active users) share in QTD 1Q26, up from merely 3% in 1Q25.

” During the first week of March Madness, Kalshi app downloads soared 96% week-over-week, more than twice the increase of any major sportsbook operator. The report said that in the same period, FanDuel was down 6% in market share, theScore Bet was down 4%, DraftKings, BetMGM, and Caesars Sportsbook were all off 2%, and Fanatics Sportsbook was down 1%. “The increased popularity of Kalshi is likely impacting revenue (and handle) growth for sportsbook operators in the U.

S. , representing a major competitive threat to the industry over the next few years,” Sensor Tower concluded. FanDuel making some cuts FanDuel is pulling the plug on a couple of operations, according to reports from SBC Americas .