Legendary investor Warren Buffett is stepping down at the end of the year, after leading the company for decades.

Warren Buffett recently donated $6 billion worth of his company's stock to five philanthropic foundations, his biggest annual donation in nearly 20 years, according to Forbes. Since 2006, when Buffett committed to gradually giving away all of his Berkshire Hathaway stock,

Warren Buffett has given away another $6 billion. The latest philanthropic donation went largely to the Gates Foundation, with the remainder going to charities run by his children. Warren Buffett has given away the biggest chunk of his fortune since he began distributing it in 2006.