Yancoal is an Australian-based mining company that specializes in the production of thermal and metallurgical coal. The company was established in 2004 and is headquartered in Sydney, Australia. Yancoal operates several mines in Australia, including the Mount Thorley Warkworth, Moolarben, and Yarrabee mines. The company also has a significant presence in China, where it operates several coal mines and has a joint venture with the Chinese government-owned company, Yanzhou Coal Mining Company. Yancoal is one of the largest coal producers in Australia and is listed on the Australian Securities Exchange.