High Quality Content by WIKIPEDIA articles! Freeport-McMoRan Copper Gold Inc., (FMCG, NYSE: FCX) often called simply Freeport, is the world`s lowest-cost copper producer and one of the world`s largest producers of gold. It was formerly based in New Orleans, Louisiana but moved its headquarters to Phoenix, Arizona, after acquiring copper producer Phelps Dodge in 2007; its headquarters are located in the Freeport-McMoRan Center in downtown Phoenix. In addition to Phelps Dodge, its subsidiaries include PT Freeport Indonesia, PT Irja Eastern Minerals and Atlantic Copper, S.A. Freeport is the largest publicly traded copper and molybdenum producer in the world.