Barrick Gold Corporation is the largest gold mining company in the world, with its headquarters in Toronto, Ontario, Canada; and four regional business units (RBU's) located in Australia, Africa, North America and South America. Barrick is currently undertaking mining and exploration projects in Papua New Guinea, the United States, Canada, Dominican Republic, Australia, Peru, Chile, Russia, South Africa, Pakistan, Colombia, Argentina and Tanzania. For 2008, it produced 7.7 million ounces of gold at a cash cost of US $443/ounce. As of December 31, 2008 its proven and probable gold mineral reserves stand at 138.5 million ounces.  Wikipedia