Dropped out of Harvard after two years to start Microsoft, becoming one of the world's richest.
Left Stanford University in two days to start his first company, Zip2. Mark Zuckerberg: Dropped out of Harvard to focus on the development of Facebook.
Left the City University of New York's Baruch College after completing two years.
Left Reed College after a semester due to financial constraints.
Dropped out of two different universities before founding Oracle.
Left the University of Texas in Austin at 19, later starting Dell Technologies.
Dropped out of college twice, from the University of Missouri-Rolla and later from New York University.
Dropped out of San Jose State University before co-founding WhatsApp.