10. Steve Ballmer
Net worth: $122.5 billion
Source: Microsoft, Clippers, investments
Age: 68
Residence: Hunts Point, Washington
Citizenship: U.S.
Ballmer, a classmate of Bill Gates’ at Harvard University, joined Microsoft as employee number 30 in 1980 after dropping out of the MBA program at Stanford University. He ran Microsoft as its CEO from 2000 to 2014.
When Ballmer retired from Microsoft, he purchased the Los Angeles Clippers team for $2 billion—a record high for an NBA team