Berkshire Hathaway Inc.

Originally a textile manufacturing company, Berkshire Hathaway was acquired by Warren Buffett and transformed into a holding company for a wide range of businesses. Its core business model centers on acquiring whole companies or significant stakes in public companies, funded in large part by the "float" generated from its extensive insurance operations. The company's philosophy, guided by Warren Buffett and Charlie Munger for decades, emphasizes long-term value investing in well-managed, understandable businesses with durable competitive advantages. Its major holdings span insurance (GEICO), freight rail transportation (BNSF Railway), utilities and energy (Berkshire Hathaway Energy), manufacturing, and retail.