BHP Billiton Broken Hill Proprietary Billiton Ltd. (BHP Billiton), the world's largest diversified resources company, was founded in 1885 and is headquartered in Melbourne, Australia.
Rio Tinto Rio Tinto is one of the world's leading mining group, combining Rio Tinto plc, a London listed public company headquartered in the UK, and Rio Tinto Limited, which is listed on the Australian Stock Exchange, with executive offices in Melbourne.
CVRD Founded in 1942 and headquartered in Rio de Janeiro, Brazil, Companhia Vale do Rio Doce (CVRD), is the world's largest iron ore producer.
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