U.S. Steel, the first billion-dollar corporation and once the world's largest producer of steel, was founded by financier J. P. Morgan.

The United States Steel Corporation is an American steel company based in Pittsburgh, Pennsylvania. It is a wholly owned subsidiary of Nippon Steel that maintains production facilities at several additional locations in the U.S. and Central Europe. The company produces and sells steel products, including flat-rolled and tubular products for customers in industries across automotive, construction, consumer, electrical, industrial equipment, distribution, and energy. Operations also include iron ore and coke production facilities.

John Pierpont Morgan Sr. was an American financier and investment banker who dominated corporate finance on Wall Street throughout the Gilded Age and Progressive Era. As the head of the banking firm that ultimately became known as JPMorgan Chase & Co., he was a driving force behind the wave of industrial consolidations in the United States at the turn of the twentieth century.