Exxon Mobil Corporation explores for and produces crude oil and natural gas in the United States, Canada/Other Americas, Europe, Africa, Asia, and Australia/Oceania. It operates through Upstream, Downstream, and Chemical segments. The company is also involved in the manufacture, trade, transport, and sale of crude oil, petroleum products, and other specialty products; and manufactures and markets petrochemicals, including olefins, polyolefins, aromatics, and various other petrochemicals. As of December 31, 2018, it had approximately 24,696 net operated wells with proved reserves of 24.3 billion oil-equivalent barrels. The company was founded in 1870 and is headquartered in Irving, Texas.