Berkshire Hathaway Inc., through its subsidiaries, engages in insurance, freight rail transportation, and utility businesses. It provides property, casualty, life, accident, and health insurance and reinsurance; and operates railroad systems in North America. The company also generates, transmits, stores, and distributes electricity from natural gas, coal, wind, solar, hydro, nuclear, and geothermal sources; operates natural gas distribution and storage facilities, interstate pipelines, and compressor and meter stations; and holds interest in coal mining assets. In addition, it offers real estate brokerage services; and leases transportation equipment and furniture. Further, the company manufactures boxed chocolates and other confectionery products; specialty chemicals, metal cutting tools, and components for aerospace and power generation applications; flooring, insulation, roofing and engineered, building and engineered components, paints and coatings, and bricks and masonry products