Berkshire Hathaway is a holding company owning subsidiaries engaged in insurance, freight rail transportation, utility and energy, manufacturing, services, and retailing businesses. It provides insurance and reinsurance services, operates railroad systems, and transports a range of products and commodities derived from the manufacturing, agricultural, and natural resource industries. The company also generates, transmits, stores, and supplies energy. Berkshire Hathaway produces industrial, building, and consumer products, such as chemicals, metal cutting tools, components for aerospace and power generation applications, flooring, insulation, roofing and engineered products, alkaline batteries, apparel products, jewelry, etc.