Investor Warren Buffett makes annual stock gifts worth more than $2.8 billion to 5 charities

Investor Warren Buffett has given more than $2.8 billion worth of Berkshire Hathaway stock to five charities as part of his plan to gradually give away his fortune.

Buffett, who is Berkshire's chairman and CEO, said in a news release Monday that he made his annual gifts last week.

Buffett has been giving away blocks of Berkshire stock since 2006 with the biggest share going to the Bill and Melinda Gates Foundation.

Buffett also gave Class B Berkshire shares to his own foundation and to the foundations run by each of his three children.

In addition to these major gifts that Buffett makes each summer, he also gives smaller blocks of stock to several unnamed charities each year.