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.

Freeport-McMoRan is a holding company. Through its subsidiaries, the company is a mining company. The company operates assets with proven and probable reserves of copper, gold and molybdenum, and the company is a publicly traded copper producer. The company's portfolio of assets includes the Grasberg minerals district in Indonesia, copper and gold deposits; and mining operations in North America and South America, including the Morenci minerals district in Arizona and the Cerro Verde operation in Peru. The company has organized its mining operations into four primary divisions: North America copper mines, South America mining, Indonesia mining and Molybdenum mines.

Glencore is engaged as a natural resource companies. Co. is organized and operates on a worldwide basis in three main business segments: Metals and minerals, which comprised of zinc, copper, lead, alumina, aluminium, ferroalloys, nickel, cobalt and iron ore; Energy products, which comprised of crude oil, oil products, steam coal and metallurgical coal; and Agricultural products, which comprised of wheat, corn, canola, barley, rice, oil seeds, meals, edible oils, biofuels, cotton and sugar supported by investments in storage, handling, processing and port facilities.

Rio Tinto is a mining group based in the United Kingdom and Australia. Co. is engaged in the business of finding, mining and processing mineral resources. Co.'s major products are iron ore, aluminium, copper, diamonds, coal, uranium, gold and industrial minerals (borax, titanium dioxide and salt). Co.'s activities span the world but are strongly represented in Australia and North America with significant businesses in South America, Asia, Europe and Africa. Co.'s operations comprise four principal product groups - Iron Ore, Aluminium, Copper and Diamonds, and Energy & Minerals.

Vale is a producer of iron ore and iron ore pellets, raw materials for steelmaking, and producer of nickel, which is used to produce stainless steel and metal alloys employed in the production of several products. Co. also produces manganese ore, ferroalloys, metallurgical and thermal coal, copper, platinum group metals ("PGMs"), gold, silver, cobalt, potash, phosphates and other fertilizer nutrients. Co. is engaged in greenfield mineral exploration in six countries around the globe. Co. operates in four segments: ferrous minerals, coal, base metals others.