Everything Berkshire owns, including all of the companies they own lock stock and barrel, e.g. Dairy Queen, Burlington Northern Santa Fe, Precision Cast Parts, Kraft Heinz (51% ownership), GEICO, and many more, as well as all of the Insurance companies and insurance holdings, a number of lucrative wholly owned utilities, and $130 Billion+ in stock holdings, e.g largest shareholder in Wells Fargo, Coca Cola, American Express, Apple, Goldman Sachs, Phillips 66, Bank of America, various Airlines, etc.