Which American billionaire founded the Standard Oil Company?

John D. Rockefeller founded the Standard Oil Company in Ohio in 1870, building the enterprise that became the dominant force in America’s early petroleum industry.

Rockefeller had entered the oil business through a Cleveland partnership with his brother William, Henry Flagler, chemist Samuel Andrews, and other investors. In 1870, he replaced that partnership with the incorporated Standard Oil Company of Ohio, capitalized at $1 million. He chose “Standard” to suggest consistent quality and service.

Rockefeller expanded by acquiring refineries, negotiating transportation advantages, and coordinating oil production, refining, and distribution. In 1882, Standard Oil’s many affiliated companies were organized under a trust, an innovative structure that helped it operate across state lines. The company’s scale and tactics made Rockefeller one of the richest people in modern history.

The U.S. Supreme Court ruled in 1911 that the Standard Oil combination was an unreasonable monopoly and ordered its breakup into 39 companies. Several successors, including Standard Oil of New Jersey and Standard Oil of New York, eventually contributed to the corporate histories of Exxon and Mobil.