- The United States Steel Corporation was founded in 1901 in Pittsburgh, Pennsylvania. At the time of its launch, U.S. Steel was the world's largest (and arguably most significant) business with capitalization of $1.4 billion.
- U.S. Steel sprang from the minds and financial backing of the newly industrializing world's leading businessmen at the turn of the 20th century. Most notably, Andrew Carnegie, Elbert H. Gary, J.P. Morgan, Charles Schwab and William Henry "Judge" Moore were the influential figures mobilizing the momentous venture.
- It can be said that much of the modern development that took place in the United States through the 20th century can trace its growth to the blast furnaces of U.S. Steel. Nearly 70 percent of total steel produced in the United States during the companies' inaugural year came from U.S. Steel.
- As the times changed, so too did U.S. Steel's corporate mission and structure. As demand for domestic steel dropped in the 1980s, U.S. Steel was restructured, diversified its holdings primarily into the energy and transportation sectors and ultimately adopted the name USX Corporation.
- In 2001, shareholders voted to separate the steel sector business from USX and reestablished a new publicly traded company under the original name, U.S. Steel Corporation. After the reorganization, the Marathon Oil Company emerged from former USX energy sector businesses.
- U.S. Steel, headquartered in Pittsburgh, remains a significant presence among steel companies worldwide and maintains large-scale production operations in the U.S., Canada and Central Europe, as well as joint ventures in Mexico and South America. The World Steel Association ranked United States Steel Corporation as the globe's 10th-largest steel producer as of 2007 statistics.
