Phillips 66 is a downstream energy company. It operates in three segments: Refining & Marketing, Midstream and Chemicals. The Refining and Marketing segment purchases, refines, markets and transports crude oil and petroleum products, mainly in the United States, Europe and Asia and also engages in power generation activities, lubricants and other specialty products businesses. The Midstream segment gathers, processes, transports and markets natural gas and fractionates and markets NGL, predominantly in the United States. The Chemicals segment manufactures and markets petrochemicals and plastics. Phillips 66 is headquartered in Houston, Texas.