How did John D Rockefeller come to own 90 percent of the standard oil company?

Answer 1

John D. Rockefeller co-founded the Standard Oil Company in 1870 and rapidly expanded its operations through aggressive business strategies, including horizontal and vertical integration. By acquiring competing refineries and consolidating oil production, transportation, and distribution, he effectively controlled the entire oil supply chain. This consolidation allowed him to dominate the market, leading to Standard Oil commanding about 90 percent of U.S. refineries and pipelines at its peak. His business practices, while controversial, were instrumental in establishing Standard Oil as a monopoly in the oil industry.