Warren Buffett donated on Friday another $6 billion of Berkshire Hathaway stock to the Gates Foundation and four family charities, his biggest annual donation since he began giving away his fortune nearly two decades ago.

NEW YORK — Famed investor Warren Buffett is donating $6 billion worth of his company's stock to five foundations, bringing the total he has given to them since 2006 to roughly $60 billion, based on their value when received.

The soon-to-be-former CEO of Berkshire Hathaway has donated 12.36 million Berkshire Class B shares, worth $6 billion, to the Gates Foundation and four family charities. The Gates