Berkshire Hathaway is a highly diversified holding company with a unique business model that leverages its core insurance operations to generate "float"—premiums collected before claims are paid—which it then invests for long-term growth. The company's revenue is broadly distributed across several major segments. Its insurance businesses, including GEICO, General Re, and Berkshire Hathaway Primary Group, form the financial backbone of the conglomerate. Beyond insurance, Berkshire owns BNSF Railway, one of the largest freight railroad networks in North America, and Berkshire Hathaway Energy, a major utility and energy infrastructure provider. The company also operates a vast "Manufacturing, Service and Retailing" (MSR) segment, which includes well-known brands such as Precision Castparts, Lubrizol, Marmon, Clayton Homes, and Pilot Travel Centers. Geographically, while Berkshire Hathaway operates globally, the vast majority of its revenue and assets are concentrated in the United States. The company's competitive position is fortified by its massive balance sheet, decentralized management structure, and the capital allocation discipline historically instilled by Warren Buffett and Charlie Munger. In addition to its wholly-owned subsidiaries, Berkshire holds substantial minority stakes in major public companies, most notably Apple, Bank of America, American Express, and Coca-Cola.
