BHP Billiton | Australian company | Britannica
BHP Billiton, international natural resources company, formed in 2001 by the merger of BHP Ltd. and Billiton PLC. One of the world''s largest mining companies, it is involved in the production of iron, steel, copper, silver, aluminum, oil, and gas. The company also has interests in engineering and transportation. BHP Billiton''s headquarters are in Melbourne, Australia.