Answer
Daniel Křetínský is/has been a CEO of AC Sparta Prague and has been since 2015.
Daniel Křetínský is a Czech billionaire businessman and lawyer, who is the chief executive officer (CEO) and 94\% owner of Energetický a průmyslový holding (EPH), the largest energy group in Central Europe, co-owner and president of football club AC Sparta Prague, and director and major shareholder of English football club West Ham United.