Harmony Gold

South Africa's largest gold miner by output, founded in 1950 and based in Randfontein on the West Rand. Harmony has spent the past decade buying up deep-level mines and is now diversifying into copper, completing its $1.01bn purchase of MAC Copper, owner of Australia's CSA mine, in October 2025.

In South Africa it runs underground mines including Moab Khotsong, Mponeng, Tshepong and Kusasalethu, alongside surface tailings operations in the Free State and on the West Rand. Abroad it operates the Hidden Valley mine in Papua New Guinea, holds half of the Wafi-Golpu copper-gold project there, and owns the CSA copper mine and Eva copper project in Australia. Gold output was 1,429,551oz in the year to June 2026. Its New York-listed ADRs trade as HMY.