X0306 4 2013-03-15 false 0001168054 CIMAREX ENERGY CO XEC 0001196793 HELMERICH HANS C/O CIMAREX ENERGY CO. 1700 LINCOLN STREET, SUITE 1800 DENVER CO 80203 true false false false Common Stock 15686 D Common Stock 50611 I Trustee, 1993 Hans Helmerich Trust Common Stock 3140 I By Daughter Sunday Common Stock 11450 I By Wife Common Stock 1062 I Co-Trustee of Family Trust Common Stock 7865 I Trustee of Family Trust Common Stock 2157 I By daughter Hailey Common Stock 55000 I Co-Trustee of The Helmerich Foundation Common Stock 2013-03-15 4 S false 52000 77.7388 D 400000 I Trustee of Estate of W.H. Helmerich III Includes 4,869 shares of restricted stock and 8,838 restricted stock units. Mr. Helmerich disclaims beneficial ownership of these shares. The price reported in Column 4 for March 15, 2013 sales is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.50 to $78.005, 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 2013-03-15