ExxonMobil operates one of the world's largest publicly traded oil companies and was formed by Exxon and Mobil.
ExxonMobil was created in 1999 through the merger of Exxon Corporation and Mobil Corporation. Both companies traced their histories to Standard Oil, which was broken up by the United States government in 1911.
The company explores for and produces oil and natural gas, refines petroleum, markets fuels and lubricants, and makes petrochemicals. Its brands include Exxon, Mobil, and Esso in some markets.
ExxonMobil is not the same as Saudi Aramco, which is majority owned by the Saudi Arabian government. ExxonMobil is publicly traded, although governments and institutions can still own shares. Its market capitalization changes with energy prices, production expectations, and broader investor sentiment.