Warren Buffett, Chairman of Berkshire Hathaway, has made a generous donation of 13.69 million shares of the company's stock, valued at USD 3.6 billion, to charitable foundations. The Bill & Melinda Gates Foundation received the highest contribution, with more than 10 million shares worth $3.6 billion. The remaining shares were allocated to the Susan Thompson Buffett Foundation, Sherwood Foundation, Howard G. Buffett Foundation, and NoVo Foundation., Companies News, Times Now