ExxonMobil Corporation is an American multinational oil and gas corporation and the largest direct descendant of John D. Rockefeller's Standard Oil. The company, which took its present name in 1999 per the merger of Exxon and Mobil, is vertically integrated across the entire oil and gas industry, and within it is also a chemicals division which produces plastic, synthetic rubber, and other chemical products. ExxonMobil is headquartered near the Houston suburb of Spring, Texas, though officially incorporated in the U.S. state of New Jersey. It is the largest United States-based oil and gas producing company. ExxonMobil is also the eighth largest company in the world by revenue and the third largest in the US.

A multinational corporation (MNC) – also called a multinational enterprise (MNE), transnational enterprise (TNE), transnational corporation (TNC), international corporation, or stateless corporation, with subtle but contrasting senses – is a corporate organization that owns and controls the production of goods or services in at least one country other than its home country. Control is considered an important aspect of an MNC to distinguish it from international portfolio investment organizations, such as some international mutual funds that invest in corporations abroad simply to diversify financial risks. Black's Law Dictionary suggests that a company or group should be considered a multinational corporation "if it derives 25% or more of its revenue from out-of-home-country operations".