John D Rockefeller's Standard Oil Company was the first trust?

John D. Rockefeller's Standard Oil Company, founded in 1870, is often considered the first significant example of a trust in the United States. It utilized a trust structure to consolidate control over the oil industry by acquiring and managing various oil companies, allowing for greater efficiency and market dominance. This practice led to concerns about monopolistic behavior, prompting regulatory responses like the Sherman Antitrust Act of 1890. Ultimately, Standard Oil was broken up in 1911 due to its anticompetitive practices.