Warren Buffett is retiring as CEO of Berkshire Hathaway after a six-decade career, leaving a legacy of over a trillion dollars and a playbook of investment principles. Greg Abel will assume leadership. Buffett's philosophy emphasizes capital preservation, distinguishing between price and value, and a long-term holding strategy, encapsulated in his famous rules like 'Never lose money' and 'Price is what you pay. Value is what you get.'