93% of Warren Buffett's Portfolio Is in These 4 Sectors

93% of Warren Buffett's Portfolio Is in These 4 Sectors

Since becoming CEO of Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) in 1965, Buffett has overseen the creation of more than $680 billion in shareholder value and delivered an aggregate return on his company's Class A shares (BRK.A) of better than 3,600,000%. While there is a long list of reasons for Buffett's success, one of the most overlooked catalysts is portfolio concentration. Despite having more than $345 billion invested in around four dozen securities, 93% of Warren Buffett's portfolio can be traced to just four sectors.