- Freeport-McMoRan Copper & Gold Inc. (FCX) - is the world's lowest-cost copper producer and one of the world's largest producers of copper and gold. FCX's operations are conducted through its subsidiaries, P.T. Freeport Indonesia (PT-FI), P.T. IRJA Eastern Minerals Corporation (Eastern Mining) and through Atlantic Copper, S.A. (Atlantic) ...www.fcx.com