Steel Empire and Carnegie Steel Company
Andrew Carnegie is best known for owning Carnegie Steel Company. He built it into the largest steel producer in the United States by controlling mines, railroads, and steel mills across the country.
Railroads, Iron Works, and Other Investments
Before steel, Carnegie owned railroads and iron works. He invested in the Union Ironworks and later the Keystone Bridge Company, using these businesses to expand his industrial network and supply chain.
Legacy and Later Business Impact
Carnegie sold his steel empire to J.P. Morgan in 1901, forming U.S. Steel. After retiring, he focused on philanthropy, funding libraries, universities, and institutions that shaped modern business and education.
Learn more about Andrew Carnegie's business career and investments on Britannica.
