The annual valuation of the 100 top mining companies put Phoenix-based Freeport McMoRan Copper & Gold in 9th place with a value of $37.87 billion [right Freeport's Miami mine startup. Credit, Freeport McMoRan C&G] and Southern Copper at 13th with a value of $30.86 billion.London-based Rio Tinto, the lead partner at the Resolution Copper mine near Superior, Arizona, is the 3rd largest company at $135.45 billion.
Freeport is the world's largest publicly-traded copper company.