Silver Wheaton Corp. (Silver Wheaton) is engaged in the silver mining business. The Company has entered into nine long-term silver purchase agreements with Goldcorp (Luismin mines and Penasquito mine in Mexico), Lundin Mining (Zinkgruvan mine in Sweden), Glencore (Yauliyacu mine in Peru), Hellas Gold (Stratoni mine in Greece), Mercator (Mineral Park mine in Arizona, the United States), Farallon (Campo Morado mine in Mexico), Aurcana (La Negra mine in Mexico), and Alexco (Keno Hill property in Canada) whereby Silver Wheaton acquires silver production from the counterparties. The Company’s silver mining projects include Luismin, Zinkgruvan, Yauliyacu, Stratoni and Penasquito. The operations at the Luismin mines, the Penasquito mine, the La Negra mine and the Campo Morado mine are conducted in Mexico. In May 2009, the Company completed the acquisition of Silverstone Resources Corp. (Silverstone). As a result, Silverstone has become a wholly owned subsidiary of Silver Wheaton.