Imperial Oil Limited explores for, produces, and sells crude oil and natural gas in Canada. It operates through three segments: Upstream, Downstream, and Chemical. The Upstream segment explores for and produces crude oil, natural gas, synthetic oil, and bitumen. As of December 31, 2020, this segment had 138 million oil-equivalent barrels of proved undeveloped reserves. The Downstream segment is involved in the transportation and refining of crude oil, as well as blending, distribution, and marketing of refined products. It also transports crude oil to refineries by contracted pipelines, common carrier pipelines, and rail; maintains a distribution system to move petroleum products to market by pipeline, tanker, rail, and road transport; and owns and operates fuel terminals, natural gas liquids, and products pipelines in Alberta, Manitoba, and Ontario. In addition, this segment markets and supplies petroleum products to motoring public through approximately 2,400 Esso and Mobil-branded sites. Further, it sells petroleum products, including fuel, asphalt, and lubricants for industrial and transportation customers, independent marketers, and resellers, as well as other refiners serving the agriculture, residential heating, and commercial markets through branded fuel and lubricant resellers. The Chemical segment manufactures and markets various petrochemicals and polyethylene, such as benzene, aromatic, and aliphatic solvents; plasticizer intermediates; and polyethylene resins. The company was incorporation in 1880 and is headquartered in Calgary, Canada. Imperial Oil Limited is a subsidiary of Exxon Mobil Corporation.