Yancoal Australia Ltd explores, develops, produces, and markets metallurgical and thermal coal in Australia, China, Japan, Taiwan, South Korea, Thailand, Vietnam, Malaysia, India, Europe, Israel, Chile, Indonesia, Cambodia, and Bangladesh. The company holds a 98.75% interest in the Moolarben coal mine in the Western Coalfields of New South Wales; an 83.6% interest in the Mount Thorley and Warkworth mines in the Hunter Valley region of New South Wales; and a 51% interest in Hunter Valley Operations, located north-west of Singleton in the Hunter Valley region of New South Wales. It also owns 100% interests in the Yarrabee mine, northeast of Blackwater in Central Queensland's Bowen Basin; Donaldson in the Hunter Valley; the Ashton mine in the Upper Hunter Valley region of New South Wales; and the Stratford Duralie mine within the New South Wales Gloucester Basin. In addition, the company owns the Middlemount mine, northeast of Emerald in Queensland's Bowen Basin; Premier Coal in Collie, Western Australia; and Austar and Cameby Downs, along with other interests in New South Wales, Queensland, and Western Australia. Incorporated in 2004 and based in Sydney, Australia, Yancoal Australia Ltd is a subsidiary of Yankuang Energy Group Company Limited.