Commonwealth Steel Company ended in 1929.
Pressed Steel Company was created in 1926.
Inland Steel Company was created in 1893.
Lackawanna Steel Company was created in 1840.
Mittal Steel Company was created in 1976.
Mobarakeh Steel Company was created in 1993.
Angang Steel Company was created in 1997.
Steel Company of Wales was created in 1947.
Ralston Steel Car Company was created in 1905.
All-Steel Equipment Company was created in 1912.
Appleby-Frodingham Steel Company was created in 1912.
Eberhart Steel Products Company was created in 1918.