Harmony Gold Mining Company Limited engages in the exploration, extraction, processing, and smelting of gold in South Africa and Papua New Guinea. The company has approximately 10 underground operations; and various surface operations, including an open cast mine and 9 processing plants, which are located in goldfields in the Witwatersrand basin of South Africa, as well as the Kraaipan Greenstone Belt. It also explores for silver, copper, and molybdenum through its Papua New Guinea projects. The company also owns interest in various exploration and development prospects, and 1 operating mine primarily at the Hidden Valley and Wafi Golpu projects; and a 100% interests in 3 projects, including the Mount Hagen in the Western Highlands, Amanab in the Sandaun province, and Tari in the Southern Highlands province in Papua New Guinea. As of June 30, 2012, its prospecting interest comprised 75,249 hectares in South Africa and 898,400 hectares in Papua New Guinea. Harmony Gold Mining Company Limited was founded in 1950 and is headquartered in Randfontein, South Africa.