Exhibit 99.1 CIMAREX ENERGY REPORTS FIRST-QUARTER 2006 EARNINGS OF $1.29 PER SHARE DENVER, May 5 /PRNewswire-FirstCall/ -- Cimarex Energy Co. (NYSE: XEC) today reported first-quarter 2006 net income of $110.2 million, or $1.29 per share. This compares to first-quarter 2005 earnings of $43.4 million, or $1.00 per diluted share. Revenues from oil and gas sales in the first quarter of 2006 were $322.0 million, compared to $137.4 million in the same period of 2005. First-quarter 2006 cash flow from operations totaled $227.1 million versus $101.1 million in the same period of 2005(1). The increases in revenues, earnings and cash flow are due to higher production and prices. First-quarter 2006 oil and gas production averaged 460.1 million cubic feet equivalent per day (MMcfe/d), a 91 percent increase over the 240.4 MMcfe/d in the same period a year earlier. Gas production rose 84 percent to 361.3 million cubic feet per day and oil volumes increased 122 percent to 16,464 barrels per day. The increase in production is attributable to the addition of Magnum Hunter operations in June 2005 and continued positive drilling results. Partially offsetting these gains were hurricane-related disruptions (18 MMcfe/d) and property divestitures (13 MMcfe/d). First-quarter 2006 gas prices increased 20 percent to $7.19 thousand cubic feet (Mcf) and oil rose 26 percent to $59.57 per barrel. First quarter of 2006 includes a $15.6 million pre-tax gain on derivative instruments associated with swaps and collars assumed as part of the Magnum Hunter acquisition which do not qualify for hedge accounting. First-quarter 2006 payments on these derivative instruments totaled $7.4 million. Capital First-quarter 2006 exploration and development (E&D) expenditures totaled $273.2 million, up from $92.7 million in the first quarter of 2005. In the first quarter of 2006, we participated in drilling 170 gross (108.8 net) wells, with an overall success rate of 89 percent. We expect full-year 2006 exploration and development expenditures to approximate $1 billion. Outlook The following statements provide a summary of production and certain expense projections for the full-year 2006. Non-operated Gulf of Mexico production of 16 MMcfe/d was shut in at end of the first quarter of 2006 because of hurricane damage. The majority of this output is expected to be restored by the end of the second quarter of 2006. Based on planned capital spending, resumption of Gulf of Mexico volumes and numerous other factors related to production forecasts, full-year 2006 volumes are expected to range from 475-495 MMcfe/d. Expenses for 2006 are expected to fall within the following ranges summarized below: Expenses ($/Mcfe): Production expense $0.95 - $1.05 Transportation expense 0.11 - 0.14 Depreciation, depletion and amortization 2.20 - 2.25 General and administrative expense 0.25 - 0.28 Production taxes (% of oil and gas revenue) 6.5% - 7.5% Conference call and web cast Cimarex will host a conference call on Friday May 5, 2006 at 11:00 a.m. Mountain Time (1:00 p.m. Eastern Time). To access the live, interactive conference call, please dial 866-406-5369 and reference call ID # 7257494 ten minutes before the scheduled start time. A digital replay will be available for one week following the live broadcast at 877-519-4471 by using the conference ID # 7257494. The listen-only web cast of the call will be accessible via www.cimarex.com. About Cimarex Energy Denver-based Cimarex Energy Co. is an independent oil and gas exploration and production company with principal operations in the Mid-Continent, Gulf Coast, Permian Basin of West Texas and New Mexico and Gulf of Mexico areas of the U.S. This communication contains statements that constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on current expectations and beliefs and are subject to a number of risks, uncertainties and assumptions that could cause actual results to differ materially from those described in the forward-looking statements. These risks and uncertainties are more fully described in SEC reports filed by Cimarex. While Cimarex makes these forward-looking statements in good faith, management cannot guarantee that anticipated future results will be achieved. Cimarex assumes no obligation and expressly disclaims any duty to update the information contained herein except as required by law. (1) Cash Flow from Operations is a non-GAAP financial measure that represents Net Cash Provided By Operating Activities adjusted for the change in operating assets and liabilities. See below for a reconciliation of the related amounts. PRICE AND PRODUCTION DATA For the Three Months Ended March 31 --------------------------- 2006 2005 ------------ ------------ Gas Production: Total production - Mcf 32,514,466 17,636,397 Gas volume - Mcf per day 361,272 195,960 Gas price - per Mcf $ 7.19 $ 6.00 Oil Production (including NGL): Total production - barrels 1,481,761 666,354 Oil volume - barrels per day 16,464 7,404 Oil price - per barrel $ 59.57 $ 47.28 OIL AND GAS CAPITALIZED COSTS INCURRED For the Three Months Ended March 31 --------------------------- 2006 2005 ------------ ------------ (in thousands) Exploration and development $ 273,231 $ 92,737 Acquisitions of other properties 2,862 243 Oil and gas expenditures 276,093 92,980 Sale proceeds -- (14) $ 276,093 $ 92,966 RECONCILIATION OF CASH FLOW FROM OPERATIONS For the Three Months Ended March 31 --------------------------- 2006 2005 ------------ ------------ (in thousands) Net cash provided by operating activities $ 228,015 $ 96,428 Increase in operating assets and liabilities (898) 4,641 Cash flow from operations $ 227,117 $ 101,069 Management believes that the non-GAAP measure of cash flow from operations is useful information for investors because it is used internally and is accepted by the investment community as a means of measuring the company's ability to fund its capital program. It is also used by professional research analysts in providing investment recommendations pertaining to companies in the oil and gas exploration and production industry. CONDENSED INCOME STATEMENTS (unaudited) For the Three Months Ended March 31 --------------------------- 2006 2005 ------------ ------------ (In thousands, except per share data) Revenues: Gas sales $ 233,723 $ 105,874 Oil sales 88,272 31,508 Gas gathering, processing, and net marketing 13,255 562 335,250 137,944 Costs and expenses: Depreciation, depletion and amortization 90,628 38,085 Asset retirement obligation accretion 1,448 385 Production 41,772 10,171 Transportation 4,308 2,474 Gas gathering and processing 6,553 53 Taxes other than income 23,546 10,895 General and administrative 10,885 7,892 Stock compensation 1,968 1,225 Expenses related to merger 31 -- Gain on derivative instruments (15,567) -- 165,572 71,180 Operating income 169,678 66,764 Other income and expense: Interest expense 6,490 188 Capitalized interest (6,219) -- Other, net (4,287) (1,241) Income before income tax expense 173,694 67,817 Income tax expense 63,543 24,452 Net income $ 110,151 $ 43,365 Earnings per share: Basic $ 1.33 $ 1.04 Diluted $ 1.29 $ 1.00 Weighted average shares outstanding: Basic 82,633 41,749 Diluted 85,242 43,218 CONDENSED CASH FLOW STATEMENTS (unaudited) For the Three Months Ended March 31 --------------------------- 2006 2005 ------------ ------------ (In thousands) Cash flows from operating activities: Net income $ 110,151 $ 43,365 Adjustment to reconcile net income to net cash provided by operating activities: Depreciation, depletion and amortization 90,628 38,085 Asset retirement obligation accretion 1,448 385 Deferred income taxes 46,681 17,312 Stock compensation 1,968 1,225 Derivative instruments (22,919) -- Other (840) 697 Changes in operating assets and liabilities: Decrease in receivables, net 28,525 7,871 (Increase) in other current assets (14,448) (7,414) (Decrease) in accounts payable and accrued liabilities (13,541) (5,015) Increase (decrease)in other non-current liabilities 362 (83) Net cash provided by operating activities 228,015 96,428 Cash flows from investing activities: Oil and gas expenditures (218,963) (96,473) Acquisition of oil and gas properties (2,862) (243) Merger related costs (469) -- Proceeds from sale of assets 60 37 Other expenditures (5,729) (3,093) Net cash used by investing activities (227,963) (99,772) Cash flows from financing activities: Borrowings (payments) on long-term debt, net -- -- Treasury stock acquired (10,281) -- Dividends paid (3,327) -- Proceeds from issuance of common stock and other 2,584 623 Net cash (used in) provided by financing activities (11,024) 623 Net change in cash and cash equivalents (10,972) (2,721) Cash and cash equivalents at beginning of period 61,647 115,746 Cash and cash equivalents at end of period $ 50,675 $ 113,025 BALANCE SHEETS (unaudited) March 31 December 31 2006 2005 ------------ ------------ (In thousands, except share data) Assets Current assets: Cash and cash equivalents $ 50,675 $ 61,647 Receivables, net 261,003 289,184 Inventories 41,100 34,784 Deferred income taxes 15,248 17,959 Other current assets 23,641 25,454 Total current assets 391,667 429,028 Oil and gas properties at cost, using the full cost method of accounting: Proved properties 3,793,939 3,602,797 Unproved properties and properties under development, not being amortized 474,897 388,839 4,268,836 3,991,636 Less -- accumulated depreciation, depletion and amortization (1,201,390) (1,114,677) Net oil and gas properties 3,067,446 2,876,959 Fixed assets, net 87,062 86,916 Goodwill 716,988 717,391 Other assets, net 75,320 70,041 $ 4,338,483 $ 4,180,335 Liabilities and Stockholders' Equity Current liabilities: Accounts payable $ 69,093 $ 81,947 Accrued liabilities 223,992 179,076 Derivative fair value 19,007 41,926 Revenue payable 96,137 94,469 Total current liabilities 408,229 397,418 Long-term debt 351,506 352,451 Deferred income taxes 761,760 717,790 Other liabilities 106,968 117,223 Stockholders' equity: Preferred stock, $0.01 par value, 15,000,000 shares authorized, no shares issued -- -- Common stock, $0.01 par value, 200,000,000 shares authorized, 83,691,390 and 83,524,285 shares issued, respectively 837 835 Treasury stock, at cost, 1,095,722 and 1,146,822 shares held, respectively (41,363) (43,554) Paid-in capital 1,858,617 1,865,597 Unearned compensation -- (15,862) Retained earnings 891,848 788,356 Accumulated other comprehensive income 81 81 2,710,020 2,595,453 $ 4,338,483 $ 4,180,335 SOURCE Cimarex Energy Co. -0- 05/05/2006 /CONTACT: Mark Burford, Director of Capital Markets of Cimarex Energy Co., +1-303-295-3995/ /Web site: http://www.cimarex.com / (XEC)