Cimarex Energy Co. (NYSE: XEC) is an oil and gas exploration and production company with operations mainly located in , , and Kansas. We pride ourselves on having strong technical teams with the common goal of adding shareholder value through drilling and production. The cornerstone to our approach is detailed pre- and post-drill economic evaluation of after-tax rate of return on invested capital for every well drilled. We continually strive to maximize our cash flow from producing properties for reinvestment in growth opportunities that are driven by the drill bit.

2012 SUMMARY HIGHLIGHTS ABBREVIATIONS

During 2012 we accomplished the following: Bbl/d — barrels per day Bbls —barrels • grew production 6% to a record 626.5 MMcfe/d; Bcf — billion cubic feet Bcfe — billion cubic feet equivalent • combined Permian Basin and Mid-Continent production increased 20% to an Boe — barrels equivalent all-time high of 586 MMcfe/d; Boe/d — barrels equivalent per day Btu — british thermal unit • increased proved reserves 10% to 2.3 Tcfe; MBbls — thousand barrels Mcf — thousand cubic feet • added 757 Bcfe of proved reserves replacing 330% of production; Mcfe — thousand cubic feet equivalent • realized net income of $353.8 million, or $4.07 per diluted share; MMBbls — million barrels MMBtu — million British thermal units • generated cash flow from operating activities of $1.2 billion; MMcf — million cubic feet MMcf/d — million cubic feet per day • sold $306 million of non-core assets; MMcfe — million cubic feet equivalent MMcfe/d — million cubic feet • evaluated, de-risked and expanded our acreage position in several key areas; and equivalent per day • ended the year with debt to total capitalization of 18%. Net Acres — Gross acreage multiplied by working interest percentage Net Production — Gross production multiplied by net revenue interest NGL or NGLs — natural gas liquids Tcf — trillion cubic feet Tcfe — trillion cubic feet equivalent

One barrel of oil or NGL is the energy equivalent of six Mcf of natural gas

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