Francois Durand / Getty Images News via Getty Images Steve Ballmer, the former CEO of Microsoft Corp. (NASDAQ: MSFT), has a net worth of $166 billion, up $20 billion this year. That makes him the eighth richest person in the world, according to the Bloomberg Billionaire list. 24/7 Wall St. Key Points Steve Ballmer, the former CEO of Microsoft Corp. (NASDAQ: MSFT), is the eighth richest person in the world. The increase in his net worth is due largely to Microsoft stock’s sharp rise in the past few ye ...