Spain has won the 2026 FIFA World Cup – and millions of new Kalshi users either won or lost money betting on the game.According to prediction market Kalshi, the platform brought in 3 million new users during the World Cup tournament, which kicked off on June 11 and ended with the Spain vs. Argentina final on July 19.In addition to the millions of new users, the company said that the World Cup broke a platform record for the most money traded in a single market. Kalshi says more than $1.2 billion in trades, the term the company uses to describe bets, were made to predict the winner of the World Cup.
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Kalshi had a large presence throughout the World Cup. The company partnered with stars of the sport, such as Luka Modrić of the Croatia national team, who served as a brand ambassador and appeared in a commercial. Kalshi also had a partnership with the Argentina national team and received a featured post for the brand on Lionel Messi's Instagram account, which has over 512 million followers.
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A commercial featuring A-lister Timothée Chalamet also appeared frequently in the U.S. market.
