Exxon Mobil Corp., or ExxonMobil, is an American multinational oil and gas corporation headquartered in Irving, Texas, United States. It is a direct descendant of John D. Rockefeller's Standard Oil company, and was formed on November 30, 1999, by the merger of Exxon and Mobil (formerly Standard Oil of New Jersey and Standard Oil of New York). It is affiliated with Imperial Oil which operates in Canada.
ExxonMobil is the largest of the world's supermajors with daily production of 3.921 million BOE. In 2008, this was approximately 3 percent of world production, which is less than several of the largest state-owned petroleum companies. When ranked by oil and gas reserves, it is 14th in the world—with less than 1 percent of the total.