Anglo American Chile, Ltd.
Antofagasta Minerals S.A.
Aurubis
BHP Billiton Plc
Boliden AB
Chinalco Luoyang
Compañia Minera Doña Inés Collahuasi SCM
Compañia Minera Zaldívar
Corporación Nacional del Cobre de Chile (CODELCO)
Freeport McMoRan Copper & Gold
Golden Dragon Precise Copper Tube Group Inc.
Halcor S.A.
Hüttenwerke Kayser AG
Kennecott Utah Copper Corporation
KGHM Polska Miedz S.A.
KM Eupora Metal AG
LS-Nikko Copper Inc.
Luvata
Méxicana de Cananea, S.A. de C.V
Méxicana de Cobre, S.A. de C.V.
Minera Escondida Limitada
Mitsubishi Materials Corporation
Mueller Industries, Inc.
Nexans
Outotec Oyj
Pan Pacific Copper
Revere Copper Products, Inc.
Rio Tinto Plc.
Sociedad Contractual Minera el Abra
Southern Copper Corporation
Sterlite Industries (India) Ltd.
Sumitomo Metal Mining Co., Ltd.
Teck Resources
Tenke Fungurume
Wieland-Werke AG
Xstrata Copper
Yunnan Copper Industry (Group) Ltd.