
Over a 34-year corporate career, Ballmer built Microsoft's foundational business infrastructure—establishing the operating-system licensing model, leading sales, systems, and support, and steering the company through the enterprise software boom, the dot-com crash, and the successful launches of Windows XP, Windows 7, Microsoft Office, SQL Server, and Xbox. He succeeded Gates as CEO in January 2000, navigating antitrust battles and tripling Microsoft's annual revenue to nearly $78 billion before announcing his retirement in August 2013 (succeeded by Satya Nadella in February 2014). Upon stepping down, Ballmer retained his massive Microsoft shareholdings (roughly 4% of the company), making him Microsoft's largest individual shareholder. In August 2014, he completed a record-breaking $2 billion acquisition of the NBA's Los Angeles Clippers. As one of the world's richest sports owners and centibillionaires, Ballmer divides his post-Microsoft life between sports management, civic data transparency via USAFacts, and aggressive multi-billion-dollar philanthropy focused on economic mobility.
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