Berkshire Hathaway Inc. (BRK.B)

Berkshire Hathaway Inc. is a wholly unique corporate entity, transformed from a struggling textile manufacturer into a colossal multinational conglomerate under the legendary leadership of Warren Buffett and the late Charlie Munger. The core economic engine of Berkshire Hathaway is its massive insurance operations, including GEICO, General Re, and Berkshire Hathaway Reinsurance. These insurance businesses generate massive amounts of "float"—premiums collected before claims are paid—which the company aggressively and astutely invests into equities and wholly-owned businesses. Berkshire's wholly-owned subsidiaries include industry giants like BNSF Railway, providing critical North American freight infrastructure, and Berkshire Hathaway Energy, a massive utility and green energy powerhouse. The conglomerate also owns dozens of manufacturing, retail, and service businesses ranging from Dairy Queen and Duracell to Precision Castparts. Furthermore, Berkshire holds incredibly lucrative, massive equity stakes in public companies, most notably Apple, Bank of America, and American Express. Known for its decentralized management structure, fortress-like balance sheet, and absolute aversion to stock splits for its Class A shares, Berkshire Hathaway stands as a monument to patient, value-driven American capitalism.