Mining Companies - Worldwide

8. Alcoa

Alcoa, Inc. is the world's third largest producer of aluminum, behind Rio Tinto Alcan and Rusal.  From its operational headquarters in Pittsburgh, Pennsylvania, Alcoa conducts operations in 44 countries. In May 2007 Alcoa made a $27 billion hostile takeover bid for Alcan, a former subsidiary, aiming to unite the two companies and form the world's largest aluminum producer. The takeover bid was withdrawn after Alcan announced a friendly takeover by Rio Tinto in July 2007.