Kirby Corp. is a leading transportation company in the United States, specializing in domestic tank barge operations. With an ESG score of 21.0, the company is categorized as a medium-risk business. Kirby Corp. transports a variety of bulk liquid products, including petrochemicals, black oil, refined petroleum products, and agricultural chemicals, along the three U.S. coasts. The company's primary revenue comes from its Marine Transportation segment, which operates tank barges and towing vessels. In addition, Kirby Corp. also offers after-market services and replacement parts for engines, transmissions, reduction gears, and power generation equipment used in various industries.