U.S. Steel became the first publicly listed business to exceed a US$1 billion market value in 1901.
United States Steel Corporation was formed in 1901 through the combination of Carnegie Steel Company, Federal Steel Company, and other businesses. The merger was organized by financier J. P. Morgan and created the first corporation commonly described as having a billion-dollar capitalization.
The company’s creation reflected the enormous scale of the American steel industry during the Second Industrial Revolution. Steel supplied railways, bridges, buildings, ships, and machinery, making control of production capacity strategically important to industrial expansion.
This early milestone is different from modern trillion-dollar records. A company’s nominal market value cannot be compared directly across centuries without considering inflation, changing financial markets, and the size of the overall economy. U.S. Steel’s $1 billion figure was nevertheless a landmark in corporate history.