BHP Billiton,is a company headquartered in Melbourne , Victoria, Australia.. It mines metals and petroleum. It was founded in 1885, in Broken Hill. Broken Hill is a mining town in the center of Australia. In 2017, BHP was the world's largest mining company, based on market capitalization, and as Australia's third-largest company by revenue, which "almost tripled between 2004 and 2012."