Maryland Mining Company ended in 1852.
Talvivaara Mining Company was created in 2004.
Stillwater Mining Company was created in 1992.
Milpo - Mining company - was created in 1949.
Western Mining Company was created in 2000.
Buenaventura - Mining company - was created in 1953.
Noranda - mining company - was created in 1922.
Vale - mining company - was created in 1942.
Maryland Drydock Company was created in 1920.
Scots Mining Company House was created in 1736.
Aniche Mining Company was created on 1773-11-11.
Yanzhou Coal Mining Company was created in 1997.