Rio Tinto Company Limited

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 that they had acquired from the Spanish State that same year.

Source: Wikipedia — Rio Tinto Company Limited (CC BY-SA 4.0)