Allegiance Coal Limited, established in 2011 and formerly based in Sydney, Australia, historically engaged in the procurement, assessment, and advancement of coal properties. The company focused its efforts on seaborne metallurgical coal mine operations and development. Its portfolio of assets included a complete ownership of the New Elk metallurgical coal undertaking located in southeast Colorado, alongside the Black Warrior coal mine in Alabama. Furthermore, the company held a substantial interest in the Telkwa metallurgical coal initiative situated in British Columbia, Canada, complementing its Tenas Project in northwest British Columbia and the Short Creek mine assets positioned west of Birmingham, Alabama. Allegiance Coal Limited was removed from the official list of the Australian Securities Exchange on August 29, 2023, following its placement into liquidation in June 2023.