Apex Silver Mines in Bolivian Mining Joint Venture

September 25, 2006

Cleary Gottlieb is representing Citigroup Global Markets, Inc. as financial advisor to Apex Silver Mines in its sale to Sumitomo of a 35% participating interest in Apex’s San Cristobal project in southwestern Bolivia and a two-year option to acquire a 35% share of certain exploration projects in Peru, Mexico, Argentina and Bolivia.