Houston-based Plains All American Pipeline, L.P. and its subsidiaries are involved in the pipeline transportation, terminalling, storage, and gathering of crude oil and natural gas liquids (NGL) in the United States and Canada. The company is segmented into two main areas of focus: the Crude Oil segment, which offers crude oil gathering and transportation via pipelines, gathering systems, trucks, barges, and railcars, as well as providing storage and related facilities; and the Natural Gas Liquids segment, which provides gathering, fractionation, storage, transportation, and terminalling activities as well as being involved in crude oil refining processes, ethane, propane, normal butane, iso-butane, and natural gasoline. The company was founded in 1981 and operates as a subsidiary of Plains GP Holdings, L.P.