X0306 4 2018-12-06 false 0001168054 CIMAREX ENERGY CO XEC 0001646275 Burford G Mark 1700 LINCOLN STREET SUITE 3700 DENVER CO 80203 false true false false VP and Chief Financial Officer Common Stock 636 I By 401(k) Common Stock 2018-12-06 4 A false 18236 0 A 112052 D Common Stock 2018-12-06 4 A false 15234 0 A 127286 D Common Stock 2018-12-09 4 F false 8100 75.22 D 119186 D Common Stock 2018-12-09 4 J false 9237 75.22 D 109949 D Represents an award of restricted stock that will vest in its entirety on December 1, 2021 provided that the reporting person remains in the continuous employment of Cimarex through that date. Represents a performance award of restricted stock that is subject to the satisfaction of certain performance criteria through December 1, 2021 provided that the reporting person remains in continuous employment with Cimarex through that date. Relates to performance awards with a vesting date of 12/9/2018. Represents shares vested but withheld for taxes as permitted by the award agreement. Represents shares forfeited pursuant to performance conditions under a Performance Award Agreement. The amount of securities beneficially owned as reported in column 5 includes 21,736 shares of restricted stock subject to service-based vesting and 74,855 shares subject to service-based vesting and the satisfaction of certain performance criteria. Francis B. Barron, as Attorney-in-Fact 2018-12-10