 says his children will manage the estate. Warren Buffett on Friday made his biggest annual donation to date, giving $5.3 billion worth of Berkshire Hathaway shares to five charities. The Oracle of Omaha has pledged to give away the fortune he built at Berkshire. The Omaha, Nebraska-based conglomerate he started running in 1965. Buffett has been making annual donations to the five charities since 2006. In an interview with the Wall Street Journal, Buffett clarified that after his death, the enormous fortune he amassed