Robert Harry Duffin

WPG Resources Ltd. is a mineral resources company. It focuses on exploration and development of iron ore projects, metal and also focuses on the development of its coal projects in South Australia. Its projects include challenger gold, tunkillia gold, tarcoola gold, penrhyn coal, and others. The company was founded on June 7, 2004 and is headquartered in Sydney, Australia.

Birrabong Corp. Ltd. engages in property and infrastructure development. The company was founded on May 16, 1996 and is headquartered in Sydney, Australia.

Centennial Coal Co. Ltd. engages in the supply of thermal and coking coal. It serves the domestic and export markets. The company was founded by Robert Graham Cameron in 1989 and is headquartered in Sydney, Australia.

Midwest Corp. Ltd. engages in the exploration, evaluation, and development of iron mines. It develops iron and steel feedstock materials projects in the Mid West Region of Western Australia. The company is headquartered in West Perth, Australia.

Mancala Pty Ltd. engages in mining services. It offers bertical development, specialized services, engineering, global mine development, and equipment hire. The company was founded by Martin Kyne and Bill Lannen in 1990 and is headquartered in Notting Hill, Australia.