2. Steve Ballmer Net Worth: $24 Billion

Former Microsoft CEO Steve Ballmer is serving as an adviser on the new season of “The Celebrity Apprentice.” Ballmer helmed the tech giant from 2000 to 2014. After stepping down, he purchased the NBA team the Los Angeles Clippers for $2 billion in 2014.

The billionaire businessman earned an undergraduate degree in mathematics and economics from Harvard, where he befriended Bill Gates. After a brief stint at the Stanford University Graduate School of Business, he dropped out to join the Microsoft team. He served as president of the company from July 1998 until February 2001, when he took over for Gates.

Find Out: Things Bill Gates Says You Should Do With Your Money

Forbes noted that much of Ballmer’s estimated net worth is tied to Microsoft stock. He also became one of Twitter’s largest shareholders in October 2015, when he purchased a 4 percent stake in the company.