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 York State Legislature in 1879 to investigate the railroads' practice of giving rebates within the state. Merchants without ties to the oil industry had pressed for the hearings. Prior to the committee's investigation, few knew of the size of Standard Oil's control and influence on seemingly unaffiliated oil refineries and pipelines - Hawke (1980) cites that only a dozen or so within Standard Oil knew the extent of company operations. The committee counsel, Simon Sterne, questioned representatives from the Erie Railroad and the New York Central Railroad and discovered that at least half of their long-haul traffic granted rebates, and