1901 - February 25 – U.S. Steel is incorporated by industrialist J. P. Morgan as the first billion-dollar corporation.

U.S. Steel, founded on February 25, 1901, was a major milestone in American corporate history. It was the creation of financier J.P. Morgan, who orchestrated the merger of several steel manufacturers to form the first billion-dollar company in the world. The company was formed at a time when the U.S. steel industry was booming, driven by the growing demand for steel in infrastructure, railways, and industrial development.

The consolidation of steel companies into U.S. Steel was significant for several reasons. It marked a new era of industrial consolidation and the rise of big business in the United States. U.S. Steel became a dominant force in the industry, controlling a large portion of the country's steel production.

The company's formation also had broader economic implications. It signaled the increasing concentration of economic power in the hands of a few large corporations, a trend that would become a defining feature of the American economy in the early 20th century. U.S. Steel's size and influence made it a target of criticism and scrutiny, leading to efforts to regulate and break up monopolies and trusts in the years that followed.