X0306 4 2013-01-07 false 0001168054 CIMAREX ENERGY CO XEC 0001196795 SULLIVAN MICHAEL J/CO C/O CIMAREX ENERGY CO. 1700 LINCOLN STREET, SUITE 1800 DENVER CO 80203 true false false false Common Stock 9752 D Common Stock 400 I IRA Common Stock 2013-01-07 4 S false 4000 61.178 D 3515 I Family Trust The price reported in Column 4 for January 7, 2013 sales is a weighted average price. These shares were sold in multiple transactions at prices ranging from $59.80 to $61.32, inclusive. The reporting person undertakes to provide to Cimarex Energy Co., any security holder of Cimarex Energy Co. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Thomas A. Richardson, attorney-in-fact 2013-01-08