Microsoft Corporation (NASDAQ:MSFT) used to be the largest Microsoft shareholder until recently. Gates started out with a 64% share in Microsoft when the company was founded with Paul Allen. Over the years, he has been selling his shares to fund the Bill and Melinda Gates Foundation. After one of his most recent share sales, Gates no longer was the largest shareholder in Microsoft. The recent sale saw his ownership reduced to 330.1 million shares. This puts him below former Microsoft CEO Steve Ballmer, who has 333 million shares. Gates has been selling an average of 80 million shares per year to fund his philanthropic efforts. Gates also stepped down as Microsoft?s chairman when Satya Nadella was named the new CEO. Gates will have more of an advisory role now.