| COMPANIA CONTRACTUAL MINERA OJOS DEL SALADO | Other | Track | 100% | Freeport - McMoran Copper & Gold Inc owns 80% interest and Sumitomo Metal Mining Co. Ltd. owns 20% interest. (Feb/06) | February 27, 2006 |
| FREEPORT-MCMORAN COPPER & GOLD INC | Public | Monitor | 0% | Through the acquisition of Phelps Dodge in Mar/07 which owns Ojos del Salado - 80% interest. (Sep/08) | September 27, 2008 |
| SUMITOMO METAL MINING COMPANY LTD. | Public | Monitor | 0% | Through its 20% interest in Minera Ojos del Salado. (Feb/06) | February 27, 2006 |
A reported interest of 0% typically implies the existence of an option agreement.
