A private-sector coal company which conducts its business through four principal operating segments: Western U.S. Mining, Eastern U.S. Mining, Australian Mining, and Trading and Brokerage.

A producer and exporter of iron ore and pellets. The Company also produces nickel, copper, manganese, ferroalloys, bauxite, precious metals, cobalt, kaolin, potash and other products.

An international mining group, combining Rio Tinto plc and Rio Tinto Limited. The Company's principal product and global support groups are Iron Ore, Energy, Industrial Minerals, Aluminium, Copper, Diamonds, Exploration and Technology.

The Company is a producer and supplier of ceramic proppant and provider of fracture and reservoir diagnostic services and fracture simulation software through its subsidiary, Pinnacle Technologies, Inc.

Manufacturer and servicer of high productivity mining equipment for the extraction of coal and other minerals and ores. The Company's equipment is used in major mining regions throughout the world to mine coal, copper, iron ore, oil sands & other minerals

The Company is a supplier of hydrogen and helium and has built positions in growth markets such as semiconductor materials, refinery hydrogen, natural gas liquefaction, home healthcare and advanced coatings and adhesives.

Connacher OIL & GAS Ltd.

The Company is a natural gas producers. Its other operations include the transportation and marketing of crude oil, natural gas and natural gas liquids, as well as the refining of crude oil and the marketing of refined petroleum products.