FRONTIER ETHANOL UNIT A 

Berkshire Hathaway Inc., through its subsidiaries, engages in the insurance, freight rail transportation, and utility businesses worldwide. 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, hydroelectric, nuclear, and geothermal sources; operates natural gas distribution and storage facilities, interstate pipelines, liquefied natural gas facilities, and compressor and meter stations; and holds interest in coal mining assets. In addition, the company manufactures boxed chocolates and other confectionery products; specialty chemicals, metal cutting tools, and components for aerospace and power generation applications; flooring products; insulation, roofing, and engineered products; building and engineered components; paints and coatings; and bricks and masonry products, as well as offers manufactured and site-built home construction, and related lending and financial services. Further, it provides recreational vehicles, apparel products, jewelry, and custom picture framing products, as well as alkaline batteries; castings, forgings, fasteners/fastener systems, and aerostructures; and seamless pipes, fittings, downhole casing and tubing, and mill forms. Additionally, the company distributes televisions and information; franchises and services quick service restaurants; distributes electronic components; and offers logistics services, grocery and foodservice distribution services, and professional aviation training and shared aircraft ownership programs. It also retails automobiles; furniture, bedding, and accessories; household appliances, electronics, and computers; jewelry, watches, crystal, china, stemware, flatware, gifts, and collectibles; kitchenware; and motorcycle apparel and equipment. The company was incorporated in 1998 and is headquartered in Omaha, Nebraska.