Kirby Corporation is the largest domestic tank barge operator in the United States. The company is responsible for transporting bulk liquid products (including petrochemicals, black oil and refined products). The company transports bulk liquid through the Mississippi River System on the Gulf Intracoastal Waterway along all three coasts of the United States, and in Alaska and Hawaii. Kirby also rents out various equipments like generators and fork lifts so that they can be utilized in industrial markets. This apart, the company focuses on manufacturing and remanufacturing equipment related to oilfield service. The company, through its subsidiaries, operates via following segments: marine transportation and distribution and services.