Kirby Corporation is a leading provider of marine transportation services in the United States. The company operates a fleet of over 800 vessels, including tank barges, towboats, and offshore support vessels. Kirby's customers include major oil companies, petrochemical producers, and agricultural companies. The company is committed to safety and environmental stewardship and has implemented a number of initiatives to reduce its environmental impact. Kirby is headquartered in Houston, Texas and was founded in 1921. The company is publicly traded on the New York Stock Exchange under the ticker symbol KEX.