Ballmer owns an estimated 4% of Microsoft, making him the software giant's largest individual shareholder. In 2014, shortly after stepping down as Microsoft CEO, Ballmer purchased the Los Angeles Clippers basketball team for $2 billion.
Ballmer lived in the same dorm and on the same floor as Bill Gates while the two attended Harvard University. The brotherly relationship between the two became strained when Ballmer started pushing the tech company into hardware, such as the Surface tablet and the Windows mobile phone, during his tenure as CEO.