Which major corporation was led by John D. Rockefeller?

John D. Rockefeller was a pivotal figure in the American industrial landscape, known primarily for founding and leading the Standard Oil Company. Established in 1870, Standard Oil revolutionized the petroleum industry and became a symbol of the monopolistic practices prevalent during the Gilded Age. Through strategic practices such as horizontal integration, Rockefeller managed to control a significant portion of the oil market, effectively eliminating competition and setting the stage for regulatory reforms in the industry.

Rockefeller's method of business greatly influenced the organization and management of massive corporations, and Standard Oil's techniques have been studied extensively in the context of both business ethics and regulation. This historic corporation played a critical role in shaping the modern economy and transforming how industries operated in the United States.

In contrast, U.S. Steel was established by Andrew Carnegie and J.P. Morgan, General Electric was formed from the merger of several electrical companies and is associated with Thomas Edison, and Carnegie Steel was led by Andrew Carnegie, another titan of the steel industry. Each of these corporations had significant implications for American industry and economy, but they were not associated with Rockefeller.