Business: Kirby Corporation conducts operations in two business segments: Marine Transportation and Distribution and Services. Through the Marine Transportation segment, Kirby operates as the premier tank barge operator in the United States, transporting bulk liquid products throughout the Mississippi River System, on the Gulf Intracoastal Waterway, along all three U.S. Coasts, and in Alaska and Hawaii. In the Distribution and Services segment, Kirby is a leading provider of after-market service and parts for engines, transmissions, reduction gears, and related equipment used in oilfield services, marine, power generation, on-highway, and other industrial applications.