Andrew Carnegie and then he sold it to J.P. Morgan
He sold steel to the US.
Andrew Carnegie.
J. P. Morgan bought it and changed the name.(;
He sold steel
I think Andrew Carnegie sold out his steel company in 1901 to US Steel so I would guess it would be at least that old.
Carnegie Controlled Almost the entire steel industry . by the time he sold his business in 1901 , Carnegie's companies produced by far the largest portion of steel.
Andrew Carnegie is best known for his work in the steel industry, where he revolutionized steel production through vertical integration. He became one of the richest men in the world and later dedicated much of his wealth to philanthropic endeavors, particularly in the areas of education and libraries.
480 million
Pittsburgh, Pennsylvania, became the center of steel production during the late 1800's. Andrew Carnegie founded Carnegie Steel Company which later was sold to US Steel Corporation there in 1870.
Philadelphia, Pennsylvania
Andrew Carnegie controlled the steel industry during the Industrial Revolution.