DRDGOLD Limited operates as a surface gold retreatment company in South Africa. It operates Ergo, a surface retreatment project that treats old slime and sand dumps to the south of Johannesburg's central business district, as well as the east and central Rand goldfields. The company also has interests in the ERPM surface operation comprising the Cason surface retreatment operation that processes surface material situated on the Witwatersrand Basin near the town of Boksburg. The company was incorporated in 1895 and is based in Roodepoort, South Africa.