Bill Gates, the richest person in the world, is giving away more of his vast fortune.
According to an SEC filing released Monday, Gates made his largest donation to charity since 2000 -- 64 million shares of Microsoft stock valued at $4.6 billion. According to Bloomberg, that figure represents about 5 percent of his wealth and reduces his stake in Microsoft to 1.3 percent from a high of 24 percent in 1996.
Gates didn't pledge the gift to a specific entity, but in the past most of his donations have gone to the Bill & Melinda Gates Foundation, which directs the money to various causes the Gates support.
In 2010, Gates joined with Warren Buffett to create the Giving Pledge, promising to give away the bulk of their fortunes and challenging other megawealthy individuals to do the same. 170 others, including Mark Zuckerberg and Priscilla Chan, have now signed the pledge.
Amazon's Jeff Bezos, who last month, is not a signatory to the pledge, but he is .