Kirby Corporation is a marine transportation and diesel engine services company. The Company operates in two business segments: marine transportation and diesel engine services. The Company’s marine transportation segment is engaged in the inland transportation of petrochemicals, black oil products and agricultural chemicals by tank barges, and the offshore transportation of dry-bulk cargoes by barge. The Company’s diesel engine services segment is engaged in the overhaul and repair of diesel engines and reduction gears, and related parts sales in three markets: the marine market, providing aftermarket service for vessels powered by diesel engines utilized in the various inland and offshore marine industries; the power generation market, providing aftermarket service for diesel engines that provide standby, peak and base load power generation for users of industrial reduction gears and for generation components of the nuclear industry; and the railroad market.