CIMAREX ENERGY CO - Significant subsidiaries of the Registrant. *Exhibit 21.1
List of Significant Subsidiaries
Cimarex Energy Co. of Colorado, a Texas corporation
Cimarex Gas Gathering, Inc., a Texas corporation
Key Production Company, Inc., a Delaware corporation
Magnum Hunter Production, Inc., a Texas corporation
Oklahoma Gas Processing, Inc., a Delaware corporation
Prize Energy Resources, Inc., a Delaware corporation
Resolute Natural Resources Southwest, LLC, a Delaware limited liability company