Larry Ellison (Oracle)

Wealth: $100 billion

Larry Ellison is known for spending money on things that are a bit unconventional, such as 98% part of the Hawaiian island of Lanai and other assets – for instance, private jets. However, Larry Ellison comes from a very humble working-class Chicago family. Larry Ellison was trying to graduate from two prestigious universities – the University of Illinois and the University of Chicago. In the end, however, he terminated his studies and preferred to study by himself. In 1977, he decided to found Oracle. The CIA (Central Intelligence Agency) soon became Oracle’s first major customer. As a result, Oracle has become one of the largest technology giants in the world.