Simplify the following text for a Grade 14 native English-speaking person.
Original: Kerkor `` Kirk '' Kerkorian ( born June 6 , 1917 ) is an Armenian-American billionaire , and president\/CEO of Tracinda Corporation , his private holding company based in Beverly Hills , California .
Simplified: Kerkor `` Kirk '' Kerkorian ( born June 6 , 1917 ) is the Armenian-American president\/CEO of Tracinda Corporation , his private holding company based in Beverly Hills , California .