Tallgrass Energy Partners is an oil and natural gas pipeline company organized as a master limited partnership , founded in 2013. The company operates approximately 7,539 miles of pipeline in the U.S. states of Nebraska, Kansas, Wyoming, Colorado, Missouri, Illinois, Indiana, and Ohio. Tallgrass operates three major natural gas lines (Rocky Mountain Express, Trailblazer, and Tallgrass Interstate Gas Transmission) as well as one oil pipeline (Pony Express). The company is based in Leawood, Kansas. It trades under the symbol TEP on the New York Stock Exchange.