Anglo American is a global mining company with a portfolio of mining operations and undeveloped resources. Co. is focused on diamonds, copper, platinum group metals (PGMs), and bulk commodities and other minerals. Co.'s segments include: De Beers, which produces rough and polished diamonds; Copper, which produces copper; Platinum, which produces PGMs; Iron Ore and Manganese, which produces iron ore, manganese ore and alloys; Coal, which produces metallurgical coal and thermal coal; and Nickel, which produces nickel.

BHP Billiton is a resources company. Co. extracts and processes minerals, oil and gas, primarily in Australia and the Americas. Co. operates four reportable segments: Petroleum, which is engaged in the exploration, development and production of oil and gas; Copper, which is engaged in the mining of copper, silver, lead, zinc, molybdenum, uranium and gold; Iron Ore, which is engaged in the mining of iron ore; and Coal, which is engaged in the mining of metallurgical coal and energy coal. Co.'s Petroleum unit comprises conventional and unconventional oil and gas assets, and includes exploration, development and production activities.

Rio Tinto is engaged in finding, mining and processing mineral resources. Co. has four product groups: iron ore, which supplies the global seaborne iron ore trade; aluminium, which includes bauxite mines, alumina refineries, and aluminium smelters; Copper and Diamonds, which has managed operations in Australia, Canada, Mongolia and the U.S., and non-managed operations in Chile and Indonesia, with by-product including gold, silver, molybdenum and others such as sulphuric acid, rhenium, and lead carbonate; and Energy and Minerals, which comprises mining, refining and marketing operations across borates, coal, iron ore concentrate and pellets, salt, titanium dioxide and uranium sectors.