Exxon Mobil Corp. engages in the exploration, development, and distribution of oil, gas, and petroleum products. It operates through the following segments: Upstream, Downstream, and Chemical. The Upstream segment produces crude oil and natural gas. The Downstream segment manufactures and trades petroleum products. The Chemical segment offers petrochemicals. The company was founded by John D. Rockefeller in 1882 and is headquartered in Irving, TX.
Their official website can be found here.