BHP Billiton, one of the world's largest integrated mining companies, is owned by Broken Hill Proprietary Company and Billiton UK. BHP Billiton, one of the world's largest integrated mining companies, was formed by the merger of Broken Hill Proprietary Company and Billiton in 2001 and is headquartered in Melbourne, Australia. BHP Billiton was ranked 115th in the 2013 World 500.