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.

Billionaire investor Warren Buffett dished out $6 billion in Berkshire Hathaway shares to five charities Saturday, marking his biggest annual donation in nearly 20 years and parting with a portion of his $152 billion estimated net worth.