In 1965, Warren Buffett took a controlling stake in a struggling textiles company called Berkshire Hathaway (BRK.A 0.19%) (BRK.B -0.09%). After realizing its operations were no longer viable, he converted it into a holding company for his various investments. Berkshire now manages numerous wholly owned subsidiaries and a $292 billion portfolio of publicly traded stocks and securities. Despite owning a stake in more than a hundred different companies during the past 60 years, Buffett has never expressly name ...