Gloucester Coal Pty Ltd engages in the production and marketing of coking and thermal coals primarily in Australia, Japan, Singapore, and the United Kingdom. It holds interests in the Stratford mine comprising the Bowens Road North pit and Roseville pits located in the Gloucester Basin; and the Duralie mine consisting of Weismantel and Clareval pits situated in the southern part of the Gloucester Basin. The company also holds interests in the Middlemount mine, a development mine located in Queensland’s Bowen Basin; and Donaldson Open Cut mine situated near the Port of Newcastle. In addition, it owns interests in Tasman underground mine located in the south of Maitland; and Abel underground mine situated near the Port of Newcastle. Gloucester Coal Pty Ltd was formerly known as Gloucester Coal Ltd. The company is headquartered in Sydney, Australia. Gloucester Coal Pty Ltd operates as a subsidiary of Yancoal Australia Ltd.