Harmony Gold Mining Co. Ltd. engages in mining and exploration of gold. The company is headquartered in Randfontein, Gauteng and currently employs 37,609 full-time employees. The company went IPO on 2002-11-27. The firm is engaged in gold mining and related activities, including exploration, extraction, and processing. The firm's segments include South Africa Underground, Surface, and International. Gold bullion, its principal product, is produced at its operations in South Africa and Papua New Guinea (PNG). Uranium and silver are produced as byproducts. In South Africa, its nine underground operations are located within the Witwatersrand Basin; one in the Klerksdorp goldfield; three in the West Rand; and five in the Free State, in the southern portion of the Witwatersrand Basin. In addition, it has an open pit mine, Kalgold, on the Kraaipan Greenstone Belt as well as several surface treatment operations. In Papua New Guinea, Hidden Valley is an open pit gold and silver mine. The company also owns Tier 1 Wafi-Golpu copper-gold project and the Eva Copper project.