Berkshire Hathaway Inc., through its subsidiaries engages in insurance, freight rail transportation, and utility businesses. It provides property and casualty insurance and reinsurance, as well as life, accident, and health reinsurance; and operates railroad systems in North America. The company also generates, transmits, and distributes electricity primarily from solar, wind, geothermal, and hydro 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; invests in fixed-income and equity instruments; and engages in manufactured