X0306 4 2017-12-07 false 0001168054 CIMAREX ENERGY CO XEC 0001319866 Abbott Gary R 1700 LINCOLN STREET SUITE 3700 DENVER CO 80203 false true false false Vice President Common Stock 1497 I By 401(k) Common Stock 2017-12-07 4 A false 20512 0 A 125449 D Common Stock 2017-12-10 4 F false 11537 111.9 D 113912 D Represents a performance award of restricted stock that is subject to three-year cliff vesting ending on 12/1/2020 and the satisfaction of certain performance criteria. Relates to performance award with a vesting date of 12/10/2017. Represents shares vested but withheld for taxes as permitted by the award agreement. The amount of shares beneficially owned as reported in column 5 includes 59,882 shares of restricted stock subject to service-based vesting and the satisfaction of certain performance criteria Francis B. Barron, as Attorney-in-Fact 2017-12-11