The Rio Tinto Company Limited (RTC) was one of the founding companies of the Rio Tinto Group conglomerate, which was responsible of the exploitation of the Riotinto-Nerva mining basin in Minas de Riotinto between 1873 and 1954.

It was founded in 1873 by British capitalists to take over the exploitation of a series of sites in the Riotinto-Nerva mining basin