Exxon 1976

EXXON CORP.

A precursor to the present ExxonMobil, the result of a 1999 merger between of the Exxon and Mobil, Exxon Corporation is the largest direct descendant of John D. Rockefeller's Standard Oil. The company was and still is vertically integrated across the entire oil and gas industry and operates on virtually every market for “Texas Tea” in the world.

ExxonMobil's earliest corporate ancestor was Vacuum Oil Company, though Standard Oil is its largest ancestor prior to its breakup. The entity today known as ExxonMobil grew out of the Standard Oil Company of New Jersey (or Jersey Standard for short), the corporate entity which effectively controlled all of Standard Oil prior to its breakup in 1911 when the Supreme Court found Standard Oil Co. of New Jersey guilty of monopolizing the petroleum industry. Jersey Standard grew alongside and with extensive partnership another Standard Oil descendant and its future merger partner, the Standard Oil Company of New York (Socony), both of which grew bigger by merging with various third companies like Humble Oil (which merged with Jersey Standard) and Vacuum Oil (merged with Socony). Both companies underwent rebranding in the 1960s and early 1970s, and by the time of the 1999 merger, Jersey Standard had been known as Exxon, and Socony known as Mobil. The merger agreement between Exxon and Mobil stipulated that Exxon would buy Mobil and rebrand as ExxonMobil, with Mobil's CEO becoming the vice-chairman of the company.

One of the world's largest companies by revenue, ExxonMobil since its merger varied from the first to tenth largest publicly traded company by revenue and has one of the largest market capitalizations out of any company. As of 2022, in the most recent rankings released in the Fortune 500, ExxonMobil was ranked sixth, and twelfth on the Fortune Global 500. ExxonMobil is the largest investor-owned oil company in the world, the largest oil company headquartered in the Western world, and the largest of the Big Oil companies in both production and market value. ExxonMobil's reserves were 20 billion barrels at the end of 2016 and the 2007 rates of production were expected to last more than 14 years. With 21 oil refineries constituting a combined daily refining capacity of 4.9 million barrels (780,000 m3), ExxonMobil is the second largest oil refiner in the world, trailing only Sinopec. Approximately 55.56% of the company's shares are held by institutions, the largest of which as of 2019 were The Vanguard Group (8.15%), BlackRock (6.61%), and State Street Corporation (4.83%).