[Kalshi Discloses 'Greek Freak' Holds Less Than 1% Stake] According to Foresight News, citing The Block, a spokesperson for Kalshi stated that NBA Milwaukee Bucks star 'Greek Freak' Giannis Antetokounmpo holds less than a 1% stake in Kalshi. The deal was signed on Thursday (February 5), the NBA trade deadline day. Based on Kalshi's recent $11 billion valuation, a 1% stake is worth $110 million.