Steven Anthony Ballmer (/ˈbɔːlmər/; born March 24, 1956) is an American businessman and investor who was the chief executive officer of Microsoft from 2000 to 2014. He is the owner of the Los Angeles Clippers of the National Basketball Association (NBA), and a co-founder of the Ballmer Group, a philanthropic investment company.
As of May 2025, Bloomberg Billionaires Index estimated his personal wealth at around $151 billion, making him the eighth-richest person in the world, and the Forbes Real-Time Billionaires List ranked him as the ninth-richest person with a net worth of $118 billion.