BHP Group Limited (formerly known as BHP Billiton) is an Australian multinational mining, metals, natural gas petroleum public company that is headquartered in Melbourne, Victoria, Australia. The Broken Hill Proprietary Company was founded on 16 July 1885 in the mining town of Silverton, New South Wales. By 2017, BHP was the world's largest mining company, based on market capitalisation, and was Melbourne's third-largest company by revenue.