Standard Oil Standard Oil Standard Oil Co. Inc. was an American oil producing, transporting, refining, and marketing company. Established in 1870 by John D. Rockefeller and Henry Flagler as a corporation in Ohio, it was the largest oil refinery in the world of its time. Its history as one of the world's first and largest multinational corporations ended in 1911, when the United States Supreme Court, in a landmark case, ruled that Standard Oil was an illegal monopoly. Standard Oil dominated the oil products market initially through horizontal integration in the refining sector, then, in later years vertical integration; the company was
Standard Oil ruled in 1911 that antitrust law required Standard Oil to be broken into smaller, independent companies. Among the "baby Standards" that still exist are ExxonMobil and Chevron. Some have speculated that if not for that court ruling, Standard Oil could have possibly been worth more than $1 trillion in the 2000s. Whether the breakup of Standard Oil was beneficial is a matter of some controversy. Some economists believe that Standard Oil was not a monopoly, and also argue that the intense free market competition resulted in cheaper oil prices and more diverse petroleum products. Critics claimed that success in meeting