Plains All American Pipeline LP engages in the operation of midstream energy infrastructure and provides logistics services for crude oil, natural gas liquids, and natural gas. It operates through the following business segments: Crude Oil and Natural Gas Liquids. The Crude Oil segment refers to pipeline transportation, terminalling, storage, and gathering assets. The Natural Gas Liquids segment produces basins and transportation corridors. The company was founded by Greg L. Armstrong in 1981 and is headquartered in Houston, TX.