Giannis Antetokounmpo said he has joined Kalshi, the second-largest prediction market platform in the US, as a shareholder and will work with the company on live events and marketing. The Milwaukee Bucks star announced the move on Feb. 6 through social media, saying he had decided to join Kalshi as an equity holder. The reaction was immediate.
Trade rumors made the timing especially sensitive
The backlash centered on two points: Antetokounmpo is still an active NBA player, and the announcement came while he was caught up in trade deadline speculation. According to Sports Illustrated, users on Kalshi were trading contracts tied to whether Antetokounmpo would be traded. That overlap led critics to argue that a player tied to active market speculation should not also hold an ownership stake in the platform hosting those contracts. The concern was simple, but sharp.
Kalshi said Antetokounmpo would be barred from trading in NBA-related markets. The company also cited strict terms of service that prohibit insider trading and market manipulation. Even so, those assurances did not settle the criticism, especially as the line between sports betting and prediction markets remains under heavy scrutiny.
Jontay Porter case still shapes the debate
The concern did not emerge in a vacuum. In April 2024, former Toronto Raptors player Jontay Porter received a lifetime ban from the NBA after leaking confidential information to sports bettors and intentionally limiting his participation in certain games to affect betting outcomes. That case left the league and its audience highly alert to any connection between players and gambling-related businesses.
The NBA itself has taken a cautious view of prediction markets. The report said the league had previously pressed the US Commodity Futures Trading Commission, or CFTC, to apply a regulatory framework similar to state-level sports betting rules in order to protect game integrity.
Kalshi is also dealing with lawsuits and state pressure
Antetokounmpo’s investment came as Kalshi faces legal pressure on multiple fronts. The platform is currently dealing with 19 federal lawsuits, with one core issue being whether its sports-related event contracts comply with the law. On the same day Antetokounmpo announced his investment, a Massachusetts court ordered Kalshi to stop its sports betting operations in the state.
State gambling regulators had already directed the company to halt sports-related markets there, but Kalshi refused and has secured partial wins in court. A separate dispute added to the pressure after an equity research analyst said Kalshi users were losing money faster than users of FanDuel and DraftKings. A Kalshi communications executive initially called that research “extortion,” then withdrew the remark, while maintaining that internal company data contradicts the analysis.
Antetokounmpo, 31, is a two-time NBA MVP, an NBA champion and a Finals MVP. He also holds stakes in MLB’s Milwaukee Brewers and MLS club Nashville SC. This time, though, the investment landed in a sector already under legal and ethical pressure, turning what could have been a routine business announcement into a debate over sports integrity and market conflicts.