Rio Tinto (corporation)

Rio Tinto Group is a British–Australian multinational mining company with dual headquarters in London, England, and Melbourne, Australia. Its shares are listed on both the London Stock Exchange and the Australian Securities Exchange, and American depositary shares of its British branch are also traded on the New York Stock Exchange.

The company traces its origins to 1873, when a syndicate of British investors, led by Hugh Matheson’s Matheson & Company, bought a mine complex on the Río Tinto in Huelva, Spain, from the Spanish government. The purchase price was £3.68 million, and the deal permanently waived any future royalty claims by Spain. The syndicate, which included Deutsche Bank (56% ownership), Matheson (24%), and the engineering firm Clark, Punchard and Company (20%), registered the Rio Tinto Company on 29 March 1873. By the late 1880s, control had passed to the Rothschild family, who expanded operations.

The mine site itself had been worked for copper, silver, gold, and other minerals since antiquity—by Iberians, Tartessians, Phoenicians, Greeks, Romans, Visigoths, and Moors. After a period of abandonment, it was rediscovered in 1556, and the Spanish government resumed operations in 1724. However, inefficiency and political and financial crises led Spain to sell the mines in 1873 at a price later judged to be far below their actual value.

After taking over, the new owners built processing facilities, developed new mining techniques, and expanded output. From 1877 to 1891, the Río Tinto Mine was the world’s top copper producer. During its early years in Spain, the company used open-air pyrite calcination in blast furnaces, which released toxic fumes that damaged farmland. On 4 February 1888, thousands of agriculturalists, anarchists, and mineworkers marched to the town hall to protest. Civil guards, fearing mob violence, fired into the crowd, killing at least 13 and wounding 35.

For decades after 1870, the company focused almost entirely on the Río Tinto Mine, ignoring expansion outside Spain. It was financially successful until 1914, colluding with other pyrite producers to control prices. World War I and its aftermath cut off the United States as a market for European pyrites, causing the company’s prominence to decline. Its failure to diversify kept it from keeping pace with other international mining firms.

That changed in 1925, when Sir Auckland Geddes became chairman. He brought in a new management team, pushed for diversification, and introduced organisational and marketing reforms. Between 1925 and 1931, Geddes recruited finance director JN Buchanan, commercial director RM Preston, and other technical executives. He also led the company into joint ventures with customers and into exploration and development of mines outside Spain.

The company’s first major acquisition came in 1929, when it issued stock to raise £2.5 million for investment in Northern Rhodesian copper mining companies. By the end of 1930, all funds were invested. Rio Tinto then consolidated its holdings in those firms under the Rhokana Corporation by forcing the various companies to merge.

During the 1930s and 1940s, Rio Tinto’s status as a mainly British-owned company operating in Spain and producing pyrites—a material important for military use—created complications. In the Spanish Civil War, the mine region fell under General Franco’s Nationalist control in 1936. Franco increasingly intervened, requisitioning pyrite for Spain and its Axis allies Germany and Italy, imposing price controls, restricting exports, and threatening nationalisation. Company management, with indirect help from the British government, managed to counter some of these moves, but much of the mine’s pyrite production was diverted to the Axis powers before and during World War II.

Over time, Rio Tinto grew through a long series of mergers and acquisitions, becoming a major producer of copper, iron ore, aluminium, and lithium. In the 2020 Forbes Global 2000, it ranked as the world’s 114th-largest public company. In the 2025 Fortune Global 500, it was listed as the 274th-largest company worldwide. The company has faced criticism from environmental groups and the government of Norway over the environmental impacts of its mining activities.