Standard Oil Co. 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 refiner in the world at its height.[7] Its history as one of the world's first and largest multinational corporations ended in 1911, when the U.S. Supreme Court ruled that Standard Oil was an illegal monopoly.
