Exxon Mobil Corporation, doing business as ExxonMobil, is an American multinational oil and gas corporation headquartered in Irving, Texas. It is the largest direct descendant of John D. Rockefeller's Standard Oil, and was formed on November 30, 1999 by the merger of Exxon (formerly the Standard Oil Company of New Jersey) and Mobil (formerly the Standard Oil Company of New York). ExxonMobil's primary brands are Exxon, Mobil, Esso, and ExxonMobil Chemical.[3] ExxonMobil is incorporated in Texas.

One of the world's largest companies by revenue, ExxonMobil from 1996 to 2017 varied from the first to sixth largest publicly traded company by market capitalization. The company was ranked ninth globally in the Forbes Global 2000 list in 2016. ExxonMobil was the tenth most profitable company in the Fortune 500 in 2017. As of 2018, the company ranked second in the Fortune 500 rankings of the largest United States corporations by total revenue. Approximately 55.56% of the company's shares are held by institutions. As of March 2019, ExxonMobil's largest shareholders include The Vanguard Group (8.15%), BlackRock (6.61%), and State Street Corporation (4.83%).