Billionaire Bill Gates is best known as the co-founder and former CEO of Microsoft Corp. (NASDAQ:MSFT). He is also known for his philanthropic efforts with the Bill and Melinda Gates Foundation Trust. Those two items collided in the first quarter with the sale of Microsoft stock. Here's what to know. What Happened: Gates stepped down as the CEO of Microsoft in 2000 and later left the board of directors in 2020. The co-founder of the software giant remains a large shareholder in the company throu