One of the superstars of the technology industry, Oracle's long-time CEO lives like a true king. A licensed pilot with several jets and exotic cars, former owner of the world's eighth biggest yacht and tennis tournament investor, Ellison also owns several multi-million dollar properties - not to mention his own island. He is the world's eighth richest person.
His tenure hasn't been without controversy, however. Ellison was accused of insider trading but settled the lawsuit with a charitable donation to Stanford University.