Larry Ellison vs. Amancio Ortega

Ellison never finished college. He started out building databases for the CIA. Daughter Megan has financed films such as Zero Dark Thirty and American Hustle; son David produced mainstream movies like The Terminator and Mission: Impossible".

Ortega first began his career manufacturing textiles through a small family company in 1963. He owns a 10% stake in Spanish telecoms firm Telxius and 5% of publicly traded natural gas grid operator Enag's.