Walter Energy, Inc. was a publicly traded "pure play" metallurgical coal producer for the global steel industry. The company also produced natural gas, steam coal and industrial coal, anthracite, metallurgical coke, and coal bed methane gas. Corporate and U.S. headquarters were located in Birmingham, Alabama, and its Canadian & UK headquarters in Vancouver, British Columbia. Walter Energy filed for bankruptcy in 2015 and its assets were purchased by Warrior Met Coal.