Buffett talks about Cook stepping down: Without Cook, there would be no Apple today.

Buffett said in an interview: "Without Tim Cook, there would be no Apple as it is today." Buffett said: "He has achieved things at Apple that no one I know could have done." Apple is the highest market value stock held by Berkshire Hathaway. "His business spans the globe, is able to get along with countries of various historical backgrounds, treats customers, employees, and of course shareholders well we are lucky to be one of them... He is truly unique." Earlier, Apple announced that Cook will step down as CEO and take on the role of Executive Chairman of the Apple Board.