AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY , 2002 REGISTRATION NO. 333- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 --------------------- FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 --------------------- CHESAPEAKE ENERGY CORPORATION (Name of Registrant as specified in its charter)

OKLAHOMA 73-1395733 (State or other jurisdiction (I.R.S. Employer of incorporation or organization) Identification No.) AUBREY K. MCCLENDON CHAIRMAN OF THE BOARD AND 6100 NORTH WESTERN AVENUE CHIEF EXECUTIVE OFFICER OKLAHOMA CITY, OKLAHOMA 73118 6100 NORTH WESTERN AVENUE (405) 848-8000 OKLAHOMA CITY, OKLAHOMA 73118 (Address, including zip code, and telephone number, (405) 848-8000 including (Name, address, including zip code, and telephone area code, of Registrant's principal executive number, including offices) area code, of agent for service)
COPY TO: JAMES M. PRINCE, ESQ. VINSON & ELKINS L.L.P. 2300 FIRST CITY TOWER 1001 FANNIN STREET HOUSTON, TEXAS 77002-6760 (713) 758-3710 (713) 615-5962 (FAX) Approximate date of commencement of proposed sale to the public: From time to time after this Registration Statement becomes effective. If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. [ ] If any of the securities registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. [X] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If delivery of the prospectus is expected to be made pursuant to Rule 434, please check the following box. [ ] CALCULATION OF REGISTRATION FEE
- -------------------------------------------------------------------------------------------------------------------------------- - -------------------------------------------------------------------------------------------------------------------------------- PROPOSED MAXIMUM PROPOSED MAXIMUM TITLE OF EACH CLASS OF AMOUNT TO BE OFFERING PRICE AGGREGATE AMOUNT OF SECURITIES TO BE REGISTERED REGISTERED PER SHARE(1) OFFERING PRICE(1) REGISTRATION FEE - -------------------------------------------------------------------------------------------------------------------------------- 6.75% Cumulative Convertible Preferred Stock..................................... 3,000,000 shares $50.22 $150,660,000 $36,007.74 - -------------------------------------------------------------------------------------------------------------------------------- Common Stock, par value $.01 per share...... (2) (3) (3) (3) - -------------------------------------------------------------------------------------------------------------------------------- - --------------------------------------------------------------------------------------------------------------------------------
(1) Estimated solely for purposes of calculating the registration fee. (2) There are being registered hereunder an indeterminate number of shares of common stock issuable upon conversion of the Preferred Stock. Initially, the number of shares of common stock issuable upon conversion of the Preferred Stock is 19,480,500. Each share of Preferred Stock is convertible into 6.4935 shares of common stock, subject to adjustments under certain circumstances. Pursuant to Rule 416 under the Securities Act, such number of shares of common stock registered hereby shall include an indeterminate number of shares of common stock that may be issued in connection with a stock split, stock dividend, recapitalization, or similar event or adjustment in the number of shares issuable as provided in certificate of designations of the Preferred Stock. (3) The shares of common stock issuable upon conversion of the Preferred Stock will be issued for no additional consideration, and therefore no registration fee is required pursuant to Rule 457(i). THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a), MAY DETERMINE. - -------------------------------------------------------------------------------- - --------------------------------------------------------------------------------

THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE MAY NOT SELL THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES IN ANY JURISDICTION WHERE THE OFFER OR SALE IS NOT PERMITTED. SUBJECT TO COMPLETION, DATED JANUARY , 2002 PRELIMINARY PROSPECTUS 3,000,000 SHARES OF CHESAPEAKE ENERGY CORPORATION 6.75% CUMULATIVE CONVERTIBLE PREFERRED STOCK (LIQUIDATION PREFERENCE $50 PER SHARE) AND COMMON STOCK (PAR VALUE $.01 PER SHARE) --------------------- This prospectus relates to the offering for resale of Chesapeake Energy Corporation Inc.'s 6.75% Cumulative Convertible Preferred Stock (liquidation preference $50 per share) and the shares of our common stock issuable upon conversion of the preferred stock. In this prospectus, the terms "Chesapeake", "we", or "us" will each refer to Chesapeake Energy Corporation Inc. and its subsidiaries. The preferred stock was offered to qualified institutional buyers, as defined in, and in reliance on, Rule 144A under the Securities Act, in transactions exempt from, or not subject to, the registration requirements of the Securities Act, through the initial purchasers, Credit Suisse First Boston Corporation, Bear Stearns, & Co. Inc., Lehman Brothers Inc. and Salomon Smith Barney Inc. This prospectus will be used by selling securityholders to resell their shares of our preferred stock and shares of our common stock issuable upon conversion of their preferred stock. We will not receive any proceeds from sales by the selling securityholders. We are an Oklahoma corporation. Our principal offices are located at 6100 North Western Avenue, Oklahoma City, Oklahoma 73118, and our telephone number is (405) 848-8000. CONVERTIBILITY OF THE PREFERRED STOCK: Holders may convert their preferred stock at any time into 6.4935 shares of common stock of Chesapeake per share of preferred stock. The conversion rate may be adjusted upon the occurrence of certain events. The common stock currently trades on the New York Stock Exchange under the symbol "CHK." The closing price of the common stock on the New York Stock Exchange was $ per share on January , 2002. MANDATORY CONVERSION OF THE PREFERRED STOCK AT OUR OPTION: On or after November 20, 2004, we may, at our option, cause the preferred stock to be automatically converted into that number of shares of common stock that are issuable at the then prevailing conversion price. We may exercise our conversion right only if, for 20 trading days within any period of 30 consecutive trading days (including the last trading day of such period), the closing price of our common stock equals or exceeds 130% of the then prevailing conversion price of the preferred stock. In addition, if there are less than 250,000 shares of preferred stock outstanding, we may, on or after November 20, 2006, at our option, cause the preferred stock to be automatically converted into that number of shares of common stock equal to the liquidation preference divided by the lesser of the then prevailing conversion price or the average closing price of the common stock for the five trading day period ending on the second day immediately preceding the date fixed for conversion. --------------------- INVESTING IN THE PREFERRED STOCK OR OUR COMMON STOCK INVOLVES RISKS. PLEASE READ CAREFULLY THE SECTION ENTITLED "RISK FACTORS" BEGINNING ON PAGE . --------------------- NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE. January , 2002

YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED OR INCORPORATED BY REFERENCE IN THIS PROSPECTUS. WE HAVE NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH DIFFERENT INFORMATION. YOU SHOULD NOT ASSUME THAT THE INFORMATION CONTAINED IN THIS PROSPECTUS IS ACCURATE AS OF ANY DATE OTHER THAN THE DATE ON THE FRONT OF THIS PROSPECTUS. TABLE OF CONTENTS

PAGE ---- About This Prospectus....................................... Prospectus Summary.......................................... Risk Factors................................................ Ratios of Earnings to Fixed Charges......................... Use of Proceeds............................................. Business.................................................... Description of the Preferred Stock.......................... Description of Chesapeake Capital Stock..................... Federal Income Tax Considerations........................... Notice to Canadian Residents................................ Selling Securityholders..................................... Plan of Distribution........................................ Legal Matters............................................... Experts..................................................... Where You Can Find More Information......................... Forward-Looking Statements..................................
ABOUT THIS PROSPECTUS This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission utilizing a "shelf" registration process or continuous offering process. Under this shelf registration process, the selling securityholders may, from time to time, sell the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of the securities which may be offered by the selling securityholders. Each time a selling securityholder sells securities, the selling security holder is required to provide you with this prospectus and, in certain cases, a prospectus supplement containing specific information about the selling security holder and the terms of the securities being offered. That prospectus supplement may include additional risk factors or other special considerations applicable to those securities. Any prospectus supplement may also add, update, or change information in this prospectus. If there is any inconsistency between the information in this prospectus and any prospectus supplement, you should rely on the information in that prospectus supplement. You should read both this prospectus and any prospectus supplement together with additional information described under "Where You Can Find More Information."

PROSPECTUS SUMMARY This summary may not contain all the information that may be important to you. You should read this entire prospectus and the documents to which we have referred you before making an investment decision. You should carefully consider the information set forth under "Risk Factors." In addition, certain statements include forward-looking information which involves risks and uncertainties. See "Forward-Looking Statements." THE COMPANY We are among the ten largest independent natural gas producers in the United States. We own interests in approximately 7,200 producing oil and gas wells with approximately 1.6 tcfe of proved reserves in the United States, as of September 30, 2001 (using oil and gas prices of 23.45 per barrel of oil and 3.50 per mcf of gas). More than 90% of our reserves are natural gas. Our primary operating area is the Mid-Continent region of the United States, which includes Oklahoma, western Arkansas, southwestern Kansas and the Texas Panhandle and in which 85% of our reserves are located. We have smaller operations in the Deep Giddings field in Texas, the Permian Basin region of southeastern New Mexico and the Williston Basin of North Dakota and Montana. Our executive offices are located at 6100 North Western Avenue, Oklahoma City , Oklahoma 73118, and our telephone number is (408) 848-8000. THE OFFERING On November 13, 2001, we completed a private offering of the preferred stock. We entered into a registration rights agreement with the initial purchasers in the private offering in which we agreed, for the benefit of the holders of the preferred stock, to file a shelf registration statement with the SEC by January 12, 2002 with respect to resales of the preferred stock and common stock issued upon the conversion thereof. We also agreed to use our reasonable best efforts to cause the shelf registration statement to be declared effective under the Securities Act by May 12, 2002 and to keep the shelf registration statement effective until November 13, 2003 or such earlier date as of which the preferred stock and common stock issued upon the conversion thereof have been sold pursuant to the shelf registration statement. SECURITIES OFFERED............ 3,000,000 shares of 6.75% cumulative convertible preferred stock. DIVIDENDS..................... Cumulative annual dividends of $3.375 per share payable quarterly in cash on each February 15, May 15, August 15 and November 15, commencing February 15, 2002, when, as and if declared by the board of directors. Dividends will be paid in arrears on the basis of a 360-day year consisting of twelve 30-day months. Dividends on the preferred stock will accumulate and be cumulative from the date of issuance thereof. Accumulated dividends on the preferred stock will not bear interest. LIQUIDATION PREFERENCE........ $50 per share, plus accumulated and unpaid dividends. RANKING....................... The preferred stock will rank with respect to dividend rights and rights upon our liquidation, winding-up or dissolution: - senior to all of our common stock and to all of our other capital stock unless the terms of that stock expressly provide that it ranks senior to or on a parity with the preferred stock; - on a parity with any of our capital stock issued in the future the terms of which expressly provide that it will rank on a parity with the preferred stock; and 1

- junior to all of our capital stock the terms of which expressly provide that such stock will rank senior to the preferred stock. All of our outstanding capital stock will rank junior to the preferred stock. We have no other preferred stock outstanding. REDEMPTION.................... Shares of preferred stock are not redeemable by us. CONVERSION RIGHTS............. Each share of preferred stock may be converted at any time, at the option of the holder, into 6.4935 shares of common stock (which is calculated using an initial conversion price of $7.70 per share of common stock) plus cash in lieu of fractional shares. The conversion price is subject to adjustment upon the occurrence of certain events. MANDATORY CONVERSION.......... On or after November 20, 2004, we may, at our option, cause the preferred stock to be automatically converted into that number of shares of common stock that are issuable at the then prevailing conversion price. We may exercise our conversion right only if, for 20 trading days within any period of 30 consecutive trading days (including the last trading day of such period), the closing price of our common stock equals or exceeds 130% of the then prevailing conversion price of the preferred stock. In addition, if there are less than 250,000 shares of preferred stock outstanding, we may, on or after November 20, 2006, at our option, cause the preferred stock to be automatically converted into that number of shares of common stock equal to the liquidation preference divided by the lesser of the then prevailing conversion price and the average closing price of the common stock for the five trading day period ending on the second day immediately preceding the date fixed for conversion. CHANGE OF CONTROL............. Except as provided below, upon a change of control, each holder of preferred stock shall, in the event that the market value of our common stock at such time is less than the conversion price, have a one-time option to convert all of its shares of preferred stock into shares of common stock at an adjusted conversion price equal to the greater of (x) the market value of the common stock (determined as described herein) and (y) $4.0733, which is 66 2/3% of the recent common stock price set forth on the cover of this prospectus. In lieu of issuing the shares of common stock issuable upon conversion in the event of a change of control, we may, at our option, make a cash payment equal to the market value of such common stock otherwise issuable as of the change of control date. Notwithstanding the foregoing, upon a change of control in which (1) each holder of our common stock receives consideration consisting solely of common stock of the successor, acquiror or other third party that is listed on a national securities exchange or quoted on the NASDAQ National Market and (2) all our common stock has been exchanged for, converted into or acquired for common stock of the successor, acquiror or other third party and the preferred stock becomes convertible solely into such common stock, the conversion price will not be adjusted as described above. 2

VOTING RIGHTS................. Except as required by Oklahoma law and our certificate of incorporation, which includes the certificate of designation for the preferred stock, the holders of preferred stock will have no voting rights unless dividends payable on the preferred stock are in arrears for six or more quarterly periods. In that event, the holders of the preferred stock, voting as a single class with the shares of any other preferred stock or preference securities having similar voting rights, will be entitled at the next regular or special meeting of our stockholders to elect two directors (or one director if fewer than six directors compose our board prior to appointment) and the number of directors that compose our board will be increased by the number of directors so elected. These voting rights and the terms of the directors so elected will continue until such time as the dividend arrearage on the preferred stock has been paid in full. The affirmative consent of holders of at least 66 2/3% of the outstanding preferred stock will be required for the issuance of any class or series of stock (or security convertible into stock) ranking senior to the preferred stock as to dividend rights or rights upon our liquidation, winding-up or dissolution and for amendments to our certificate of incorporation that would affect adversely the rights of holders of the preferred stock. TAX CONSEQUENCES.............. The U.S. Federal income tax consequences of purchasing, owning and disposing of the preferred stock and any common stock received upon its conversion are described in "Federal Income Tax Considerations." Prospective investors are urged to consult their own tax advisors regarding the tax consequences of purchasing, owning and disposing of the preferred stock and any common stock received upon its conversion in light of their personal investment circumstances, including consequences resulting from the possibility that actual or constructive distributions on the preferred stock may exceed our current and accumulated earnings and profits, as calculated for U.S. Federal income tax purposes, in which case they would not be treated as dividends for U.S. Federal income tax purposes. COMMON STOCK.................. Our common stock is listed for trading on the NYSE under the symbol "CHK." RISK FACTORS AN INVESTMENT IN THE PREFERRED STOCK INVOLVES CERTAIN RISKS THAT A POTENTIAL INVESTOR SHOULD CAREFULLY EVALUATE PRIOR TO MAKING AN INVESTMENT IN THE PREFERRED STOCK. SEE "RISK FACTORS." 3

RISK FACTORS In addition to the other information set forth elsewhere or incorporated by reference in this prospectus, the following factors relating to our company, the preferred stock and our common stock should be considered carefully in deciding whether to participate in the exchange offer. RISKS RELATED TO OUR BUSINESS OIL AND GAS PRICES ARE VOLATILE. A DECLINE IN PRICES COULD ADVERSELY AFFECT OUR FINANCIAL RESULTS, CASH FLOWS, ACCESS TO CAPITAL AND ABILITY TO GROW. Our revenues, operating results, profitability, future rate of growth and the carrying value of our oil and gas properties depend primarily upon the prices we receive for our oil and gas. Prices also affect the amount of cash flow available for capital expenditures and our ability to borrow money or raise additional capital. The amount we can borrow from banks is subject to periodic redeterminations based on current prices at the time of redetermination. In addition, we may have ceiling test writedowns if prices decline significantly from present levels. Historically, the markets for oil and gas have been volatile, and they are likely to continue to be volatile. Wide fluctuations in oil and gas prices may result from relatively minor changes in the supply of and demand for oil and natural gas, market uncertainty and other factors that are beyond our control, including: - political instability or armed conflict in oil producing regions; - worldwide and domestic supplies of oil and gas; - weather conditions; - the level of consumer demand; - the price and availability of alternative fuels; - the availability of pipeline capacity; - the price and level of foreign imports; - domestic and foreign governmental regulations and taxes; - the ability of the members of the Organization of Petroleum Exporting Countries to agree to and maintain oil price and production controls; and - the overall economic environment. These factors and the volatility of the energy markets make it extremely difficult to predict future oil and gas price movements with any certainty. Declines in oil and gas prices would not only reduce revenue, but could reduce the amount of oil and gas that we can produce economically and, as a result, could have a material adverse effect on our financial condition, results of operations and reserves. Further, oil and gas prices do not necessarily move in tandem. Because approximately 91% of our proved reserves are currently natural gas reserves, we are more susceptible to movements in natural gas prices. The recent prices we have received for our natural gas are significantly lower than what we received in early 2001. At year end 2000, Henry Hub natural gas spot prices exceeded $10.00 per MMbtu. At September 28, 2001, the spot price for Henry Hub gas dropped to $1.83 per MMbtu. On December 31, 2001 the NYMEX spot price for Henry Hub natural gas was $2.74 per MMbtu. Recent spot prices have continued to fluctuate. OUR LEVEL OF INDEBTEDNESS MAY ADVERSELY AFFECT OPERATIONS AND LIMIT GROWTH, AND WE MAY HAVE DIFFICULTY MAKING INTEREST AND PRINCIPAL PAYMENTS ON OUR INDEBTEDNESS AS THEY BECOME DUE. As of September 30, 2001, we had long-term indebtedness of approximately $1.3 billion, which included bank indebtedness of approximately $189 million. Our long-term indebtedness represented approximately 67% 4

of our total book capitalization at September 30, 2001. As of December 31, 2001, we had long-term indebtedness of approximately $1.3 billion, which included no bank indebtedness. We will continue to be highly leveraged after this exchange. Our level of indebtedness affects our operations in several ways, including the following: - a substantial portion of our cash flows must be used to service our indebtedness, and we cannot assure you that our business will generate sufficient cash flow from operations to enable us to continue to meet our obligations under our indebtedness; - a high level of indebtedness increases our vulnerability to general adverse economic and industry conditions; - the covenants contained in the agreements governing our outstanding indebtedness limit our ability to borrow additional funds, dispose of assets, pay dividends and make certain investments; - our debt covenants may also affect our flexibility in planning for, and reacting to, changes in the economy and in our industry; and - a high level of indebtedness may impair our ability to obtain additional financing in the future for working capital, capital expenditures, acquisitions or general corporate and other purposes. We may incur additional debt, including significant secured indebtedness, in order to make future acquisitions or to develop our properties. A higher level of indebtedness increases the risk that we may default on our debt obligations. Our ability to meet our debt obligations and to reduce our level of indebtedness depends on our future performance. General economic conditions, oil and gas prices and financial, business and other factors affect our operations and our future performance. Many of these factors are beyond our control. We cannot assure you that we will be able to generate sufficient cash flow to pay the interest on our debt or that future working capital, borrowings or equity financing will be available to pay or refinance such debt. Factors that will affect our ability to raise cash through an offering of our capital stock or a refinancing of our debt include financial market conditions, the value of our assets and our performance at the time we need capital. In addition, our bank borrowing base is subject to periodic redeterminations. We could be forced to repay a portion of our bank borrowings due to redeterminations of our borrowing base. We cannot assure you that we will have sufficient funds to make such repayments. If we do not have sufficient funds and are otherwise unable to negotiate renewals of our borrowings or arrange new financing, we may have to sell significant assets. Any such sale could have a material adverse effect on our business and financial results. LOWER OIL AND GAS PRICES COULD NEGATIVELY IMPACT OUR ABILITY TO BORROW. Lower natural gas prices could reduce our capacity to borrow under our bank credit facility or under our indenture covenants. Natural gas prices at December 31, 2001 were significantly below prices prevailing at December 31, 2000. Our current bank credit facility limits our borrowings to a borrowing base, presently $225 million. The borrowing base is determined periodically at the discretion of a majority of the banks and is based in part on oil and gas prices. Additionally, some of our indentures contain covenants limiting our incurrence of indebtedness. The indebtedness limitations in the indentures are based on a variety of financial measurements including a ratio that is dependent upon a percentage of our adjusted consolidated net tangible assets, which is determined using discounted future net revenues from proved oil and gas reserves as of the end of each year. OUR INDUSTRY IS EXTREMELY COMPETITIVE. The energy industry is extremely competitive. This is especially true with regard to exploration for, and development and production of, new sources of oil and natural gas. As an independent producer of oil and natural gas, we frequently compete against larger and financially stronger companies in acquiring properties 5

suitable for exploration, in contracting for drilling equipment and other services and in securing trained personnel. OUR COMMODITY PRICE RISK MANAGEMENT TRANSACTIONS MAY EXPOSE US TO THE RISK OF FINANCIAL LOSS IN CERTAIN CIRCUMSTANCES. In order to manage our exposure to price volatility in marketing our oil and gas, we enter into oil and gas price risk management arrangements for a portion of our expected production. These arrangements may expose us to the risk of financial loss in certain circumstances, including instances in which: - our production is less than expected; - there is a widening of price differentials between delivery points for our production and the delivery point assumed in the hedge arrangement; or - the counterparties to our contracts fail to perform the contracts. Some of our commodity price risk management arrangements require us to deliver cash collateral or other assurances of performance to the counterparties in the event that our payment obligations with respect to our commodity price risk management transactions exceed certain levels. Because of current commodity prices, we have no cash collateral requirements under our present risk management arrangements. Future collateral requirements are uncertain, but will depend on arrangements with our counterparties and highly volatile natural gas and oil prices. ESTIMATES OF OIL AND GAS RESERVES ARE UNCERTAIN AND INHERENTLY IMPRECISE. This prospectus contains estimates of our proved reserves and the estimated future net revenues from our proved reserves. These estimates are based upon various assumptions, including assumptions required by the Securities and Exchange Commission relating to oil and gas prices, drilling and operating expenses, capital expenditures, taxes and availability of funds. The process of estimating oil and gas reserves is complex. The process involves significant decisions and assumptions in the evaluation of available geological, geophysical, engineering and economic data for each reservoir. Therefore, these estimates are inherently imprecise. Actual future production, oil and gas prices, revenues, taxes, development expenditures, operating expenses and quantities of recoverable oil and gas reserves most likely will vary from these estimates. Such variations may be significant and could materially affect the estimated quantities and present value of our proved reserves. In addition, we may adjust estimates of proved reserves to reflect production history, results of exploration and development drilling, prevailing oil and gas prices and other factors, many of which are beyond our control. Our properties may also be susceptible to hydrocarbon drainage from production by operators on adjacent properties. At December 31, 2000, approximately 30% (27% on a pro forma basis for the Gothic acquisition) by volume of our estimated proved reserves were undeveloped. Recovery of undeveloped reserves requires significant capital expenditures and successful drilling operations. The estimates of these reserves included the assumption that we would make significant capital expenditures to develop the reserves, including $216 million ($235 million on a pro forma basis for the Gothic acquisition) in 2001. Although we have prepared estimates of our oil and gas reserves and the costs associated with these reserves in accordance with industry standards, we cannot assure you that the estimated costs are accurate, that development will occur as scheduled or that the results will be as estimated. You should not assume that the present values referred to in this prospectus represent the current market value of our estimated oil and gas reserves. In accordance with Securities and Exchange Commission requirements, the estimates of present values are based on prices and costs as of the date of the estimates, except as otherwise noted in this prospectus. If the present value of our combined proved reserves were calculated using NYMEX spot prices of $22.00 per barrel of oil and $3.00 per mcf of gas, adjusted for our price differentials, the present value of our combined proved reserves at December 31, 2000 would have been $1.65 billion ($1.52 billion excluding Canadian reserves, which were sold on October 1, 2001). 6

Any changes in consumption by oil and gas purchasers or in governmental regulations or taxation will also affect actual future net cash flows. The timing of both the production and the expenses from the development and production of oil and gas properties will affect both the timing of actual future net cash flows from proved reserves and their present value. In addition, the 10% discount factor, which is required by the Securities and Exchange Commission to be used in calculating discounted future net cash flows for reporting purposes, is not necessarily the most accurate discount factor. The effective interest rate at various times and the risks associated with our business or the oil and gas industry in general will affect the accuracy of the 10% discount factor. IF WE ARE NOT ABLE TO REPLACE RESERVES, WE MAY NOT BE ABLE TO SUSTAIN PRODUCTION. Our future success depends largely upon our ability to find, develop or acquire additional oil and gas reserves that are economically recoverable. Unless we replace the reserves we produce through successful development, exploration or acquisition, our proved reserves will decline over time. In addition, approximately 30% (27% on a pro forma basis for the Gothic acquisition) of our total estimated proved reserves at December 31, 2000 were undeveloped. By their nature, undeveloped reserves are less certain. Recovery of such reserves will require significant capital expenditures and successful drilling operations. We cannot assure you that we can successfully find and produce reserves economically in the future. In addition, we may not be able to acquire proved reserves at acceptable costs. IF WE DO NOT MAKE SIGNIFICANT CAPITAL EXPENDITURES, WE MAY NOT BE ABLE TO REPLACE RESERVES. Our exploration, development and acquisition activities require substantial capital expenditures. Historically, we have funded our capital expenditures through a combination of cash flows from operations, our bank credit facility, debt and equity issuances and the sale of non-core assets. Future cash flows are subject to a number of variables, such as the level of production from existing wells, prices of oil and gas and our success in developing and producing new reserves. If revenue were to decrease as a result of lower oil and gas prices or decreased production, and our access to capital were limited, we would have a reduced ability to replace our reserves. If our cash flow from operations is not sufficient to fund our capital expenditure budget, there can be no assurance that additional bank debt, debt or equity issuances or other methods of financing will be available to meet these requirements. ACQUISITIONS ARE SUBJECT TO THE UNCERTAINTIES OF EVALUATING RECOVERABLE RESERVES AND POTENTIAL LIABILITIES. Our recent growth is due in part to acquisitions of exploration and production companies and producing properties. We expect acquisitions will also contribute to our future growth. Successful acquisitions require an assessment of a number of factors, many of which are beyond our control. These factors include recoverable reserves, exploration potential, future oil and gas prices, operating costs and potential environmental and other liabilities. Such assessments are inexact and their accuracy is inherently uncertain. In connection with our assessments, we perform a review of the acquired properties, which we believe is generally consistent with industry practices. However, such a review will not reveal all existing or potential problems. In addition, our review may not permit us to become sufficiently familiar with the properties to fully assess their deficiencies and capabilities. We do not inspect every well. Even when we inspect a well, we do not always discover structural, subsurface and environmental problems that may exist or arise. We are generally not entitled to contractual indemnification for preclosing liabilities, including environmental liabilities. Normally, we acquire interests in properties on an "as is" basis with limited remedies for breaches of representations and warranties. In addition, competition for producing oil and gas properties is intense and many of our competitors have financial and other resources which are substantially greater than those available to us. Therefore, we cannot assure you that we will be able to acquire oil and gas properties that contain economically recoverable reserves or that we will complete such acquisitions on acceptable terms. Additionally, significant acquisitions can change the nature of our operations and business depending upon the character of the acquired properties, which may have substantially different operating and geological characteristics or be in different geographic locations than our existing properties. While it is our current 7

intention to continue to concentrate on acquiring properties with development and exploration potential located in the Mid-Continent region, there can be no assurance that in the future we will not decide to pursue acquisitions or properties located in other geographic regions. To the extent that such acquired properties are substantially different than our existing properties, our ability to efficiently realize the economic benefits of such transactions may be limited. FUTURE PRICE DECLINES MAY RESULT IN A WRITE-DOWN OF ASSET CARRYING VALUES. We utilize the full cost method of accounting for costs related to our oil and gas properties. Under this method, all such costs (productive and nonproductive) are capitalized and amortized on an aggregate basis over the estimated lives of the properties using the units-of-production method. These capitalized costs are subject to a ceiling test, however, which limits such pooled costs to the aggregate of the present value of future net revenues attributable to proved oil and gas reserves discounted at 10% plus the lower of cost or market value of unproved properties. The full cost ceiling is evaluated at the end of each quarter utilizing the prices for oil and gas at that date. At September 30, 2001, our unamortized costs of oil and gas properties exceeded this ceiling amount by approximately $220 million due to low gas prices in effect on that date. The NYMEX spot price for natural gas at Henry Hub was $1.83 per MMbtu on September 28, 2001. However, due to a subsequent recovery in market prices for natural gas, we were not required to record a write-down of oil and gas properties. The NYMEX spot price for Henry Hub natural gas on December 31, 2001 was $2.74 per MMbtu. A decline in gas and oil prices or other factors, without other mitigating circumstances, could cause a future write-down of capitalized costs and a non-cash charge against future earnings. OIL AND GAS DRILLING AND PRODUCING OPERATIONS ARE HAZARDOUS AND EXPOSE US TO ENVIRONMENTAL LIABILITIES. Oil and gas operations are subject to many risks, including well blowouts, cratering and explosions, pipe failure, fires, formations with abnormal pressures, uncontrollable flows of oil, natural gas, brine or well fluids, and other environmental hazards and risks. Our drilling operations involve risks from high pressures and from mechanical difficulties such as stuck pipes, collapsed casings and separated cables. If any of these risks occurs, we could sustain substantial losses as a result of: - injury or loss of life; - severe damage to or destruction of property, natural resources and equipment; - pollution or other environmental damage; - clean-up responsibilities; - regulatory investigations and penalties; and - suspension of operations. Our liability for environmental hazards includes those created either by the previous owners of properties that we purchase or lease or by acquired companies prior to the date we acquire them. In accordance with industry practice, we maintain insurance against some, but not all, of the risks described above. We cannot assure you that our insurance will be adequate to cover casualty losses or liabilities. Also, we cannot predict the continued availability of insurance at premium levels that justify its purchase. EXPLORATION AND DEVELOPMENT DRILLING MAY NOT RESULT IN COMMERCIALLY PRODUCTIVE RESERVES. We do not always encounter commercially productive reservoirs through our drilling operations. We cannot assure you that the new wells we drill or participate in will be productive or that we will recover all or any portion of our investment in wells drilled. The seismic data and other technologies we use do not allow us to know conclusively prior to drilling a well that oil or gas is present or may be produced economically. The cost of drilling, completing and operating a well is often uncertain, and cost factors can adversely affect the economics of a project. Our efforts will be unprofitable if we drill dry wells or wells that are productive but do 8

not produce enough reserves to return a profit after drilling, operating and other costs. Further, our drilling operations may be curtailed, delayed or canceled as a result of a variety of factors, including: - unexpected drilling conditions; - title problems; - pressure or irregularities in formations; - equipment failures or accidents; - adverse weather conditions; - compliance with environmental and other governmental requirements; and - cost of, or shortages or delays in the availability of, drilling rigs and equipment. THE LOSS OF KEY PERSONNEL COULD ADVERSELY AFFECT OUR ABILITY TO OPERATE. We depend, and will continue to depend in the foreseeable future, on the services of our officers and key employees with extensive experience and expertise in evaluating and analyzing producing oil and gas properties and drilling prospects, maximizing production from oil and gas properties and marketing oil and gas production. Our ability to retain our officers and key employees is important to our continued success and growth. The unexpected loss of the services of one or more of these individuals could have a detrimental effect on our business. RISKS RELATED TO THE PREFERRED STOCK WE MAY NOT BE ABLE TO PAY CASH DIVIDENDS ON THE PREFERRED STOCK. We are required to pay all declared dividends on the preferred stock in cash. Our existing indentures limit, and any indentures and other financing agreements that we enter into in the future will likely limit, our ability to pay cash dividends on our capital stock. Specifically, under our existing indentures, we may pay cash dividends and make other distributions on or in respect of our capital stock, including the preferred stock, only if certain financial tests are met. From December 31, 1998 through March 31, 2000, we did not meet the debt incurrence test contained in one of our indentures. As a result, we were unable to pay dividends on our then existing preferred stock. Beginning June 30, 2000, we met this debt incurrence test, and resume paying quarterly preferred stock dividends on November 1, 2000. As of September 30, 2001, our coverage ratio, as calculated in accordance with our most restrictive senior notes indenture, was approximately 7 to 1. In the event that any of our indentures or other financing agreements in the future restrict our ability to pay cash dividends on the preferred stock, we will be unable to pay cash dividends on the preferred stock unless we can refinance amounts outstanding under those agreements. Our failure to pay cash dividends on the preferred stock could result in the election of up to two members of our board of directors by the holders of the preferred stock. Under Oklahoma law, cash dividends on capital stock may only be paid from "surplus" or, if there is no "surplus," from the corporation's net profits for the then current or the preceding fiscal year. Unless we continue to operate profitably, our ability to pay cash dividends on the preferred stock would require the availability of adequate "surplus," which is defined as the excess, if any, of our net assets (total assets less total liabilities) over our capital. Further, even if adequate surplus is available to pay cash dividends on the preferred stock, we may not have sufficient cash to pay dividends on the preferred stock. 9

RATIOS OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED DIVIDENDS For purposes of determining the ratio of earnings to fixed charges and preferred dividends, earnings are defined as net income (loss) before income taxes, extraordinary items, amortization of capitalized interest and fixed charges, less capitalized interest. Fixed charges consist of interest (whether expensed or capitalized), and amortization of debt expenses and discount or premium relating to any indebtedness.

YEAR ENDED YEAR ENDED JUNE 30, SIX MONTHS ENDED DECEMBER 31, NINE MONTHS ENDED ----------- DECEMBER 31, ------------------ SEPTEMBER 30, 1996 1997 1997 1998 1999 2000 2001 ---- ---- ---------------- ---- ---- ---- ----------------- Ratio of earnings to combined fixed charges and preferred dividends....... 2.4x (a) (b) (c) 1.1x 2.8x 5.6x
- --------------- (a) Earnings for such year were insufficient to cover combined fixed charges and preferred dividends by approximately $185 million. (b) Earnings for such six month period were insufficient to cover combined fixed charges and preferred dividends by approximately $32 million. (c) Earnings for such year were insufficient to cover combined fixed charges and preferred dividends by approximately $927 million. USE OF PROCEEDS We will not receive any of the proceeds from the sale of the preferred stock or the common stock contemplated by this prospectus. See "Selling Securityholders" for a list of the persons receiving proceeds from the sale of the preferred stock or the underlying common stock. BUSINESS We are among the ten largest independent natural gas producers in the United States. We own interests in approximately 7,200 producing oil and gas wells with approximately 1.6 tcfe of proved reserves in the United States, as of September 30, 2001 (using oil and gas prices of 23.45 per barrel of oil and 3.50 per mcf of gas). More than 90% of our reserves are natural gas. Our primary operating area is the Mid-Continent region of the United States, which includes Oklahoma, western Arkansas, southwestern Kansas and the Texas Panhandle and in which 85% of our reserves are located. We have smaller operations in the Deep Giddings field in Texas, the Permian Basin region of southeastern New Mexico and the Williston Basin of North Dakota and Montana. Additional information concerning our company is included in our reports and other documents incorporated by reference in this prospectus. See "Where You Can Find More Information." DESCRIPTION OF THE PREFERRED STOCK The following is a summary of certain provisions of the certificate of designation for our 6.75% Cumulative Convertible Preferred Stock. A copy of the certificate of designation and the form of Convertible Preferred Stock share certificate are available upon request from Chesapeake at the address set forth under "Where You Can Find More Information." The following summary of the terms of Convertible Preferred Stock does not purport to be complete and is subject to, and qualified in its entirety by reference to, the provisions of the certificate of designation. As used in this section, the term the "Company" refers to Chesapeake Energy Corporation and not any of its subsidiaries. GENERAL Under the Company's certificate of incorporation, the Company's board of directors (the "Board of Directors") is authorized, without further stockholder action, to issue up to 10,000,000 shares of preferred stock, par value $.01 per share, in one or more series, with such voting powers or without voting powers, and with such designations, preferences and relative, participating, optional or other special rights, and qualifications, limitations or restrictions, as shall be set forth in the resolutions providing therefor. The Company 10

currently has 3,000,000 shares of preferred stock outstanding. The Board of Directors has also authorized the issuance of up to 250,000 shares of Series A Junior Participating Convertible Preferred Stock in connection with the adoption of the Company's share rights plan in July 1998. None of such shares is outstanding. See "Description of Chesapeake Capital Stock." The Convertible Preferred Stock and any common stock issued upon the conversion of the Convertible Preferred Stock will be fully paid and nonassessable. The holders of the Convertible Preferred Stock have no preemptive or preferential right to purchase or subscribe to stock, obligations, warrants or other securities of the Company of any class. The transfer agent, registrar, redemption, conversion and dividend disbursing agent for shares of both the Convertible Preferred Stock and common stock is UMB Bank, N.A. The Convertible Preferred Stock is subject to mandatory conversion, as described below in "-- Mandatory Conversion," but is not redeemable by the Company. RANKING The Convertible Preferred Stock will, with respect to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company, ranks (i) senior to all classes of common stock of the Company and to the Series A Junior Participating Convertible Preferred Stock and each other class of capital stock or series of preferred stock established after the original issue date of the Convertible Preferred Stock (the "Issue Date"), by the Board of Directors, the terms of which do not expressly provide that such class or series ranks senior to or on a parity with the Convertible Preferred Stock as to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company (collectively referred to as "Junior Stock"); (ii) on a parity with any class of capital stock or series of preferred stock established after the Issue Date by the Board of Directors, the terms of which expressly provide that such class or series will rank on a parity with the Convertible Preferred Stock as to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company (collectively referred to as "Parity Stock"); and (iii) junior to each class of capital stock or series of preferred stock established after the Issue Date by the Board of Directors, the terms of which expressly provide that such class or series will rank senior to the Convertible Preferred Stock as to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company ("Senior Stock"). While any shares of Convertible Preferred Stock are outstanding, the Company may not authorize, increase the authorized amount of, or issue any shares of, any class or series of Senior Stock (or any security convertible into Senior Stock) without the affirmative vote or consent of the holders of at least 66 2/3% of the outstanding shares of Convertible Preferred Stock. Without the consent of any holder of Convertible Preferred Stock, however, the Company may authorize, increase the authorized amount of, or issue any shares of, any class or series of Parity Stock or Junior Stock. See "-- Voting Rights." DIVIDENDS Holders of shares of Convertible Preferred Stock will be entitled to receive, when, as and if declared by the Board of Directors out of funds of the Company legally available for payment, cumulative cash dividends at the rate per annum of 6.75% per share on the liquidation preference thereof of $50 per share of Convertible Preferred Stock (equivalent to $3.375 per annum per share). Dividends on the Convertible Preferred Stock will be payable quarterly on February 15, May 15, August 15 and November 15 of each year, commencing February 15, 2002 (each, a "Dividend Payment Date") at such annual rate, and shall accumulate from the most recent date as to which dividends shall have been paid or, if no dividends have been paid, from the Issue Date of the Convertible Preferred Stock, whether or not in any dividend period or periods there shall be funds of the Company legally available for the payment of such dividends. Dividends will be payable to holders of record as they appear on the Company's stock register on the immediately preceding February 1, May 1, August 1 and November 1 (each, a "Record Date"). Accumulations of dividends on shares of Convertible Preferred Stock will not bear interest. Dividends payable on the Convertible Preferred Stock for any period less than a full dividend period (based upon the number of days elapsed during the period) will be computed on the basis of a 360-day year consisting of twelve 30-day months. No dividend will be declared or paid upon, or any sum set apart for the payment of dividends upon, any outstanding share of the Convertible Preferred Stock with respect to any dividend period unless all dividends 11

for all preceding dividend periods have been declared and paid or declared and a sufficient sum set apart for the payment of such dividend, upon all outstanding shares of Convertible Preferred Stock. No dividends or other distributions (other than a dividend or distribution payable solely in shares of Parity Stock or Junior Stock (in the case of Parity Stock) or Junior Stock (in the case of Junior Stock) and cash in lieu of fractional shares) may be declared, made or paid, or set apart for payment upon, any Parity Stock or Junior Stock, nor may any Parity Stock or Junior Stock be redeemed, purchased or otherwise acquired for any consideration (or any money paid to or made available for a sinking fund for the redemption of any Parity Stock or Junior Stock) by or on behalf of the Company (except by conversion into or exchange for shares of Parity Stock or Junior Stock (in the case of Parity Stock) or Junior Stock (in the case of Junior Stock)) unless all accumulated and unpaid dividends have been or contemporaneously are declared and paid, or are declared and a sum sufficient for the payment thereof is set apart for such payment, on the Convertible Preferred Stock and any Parity Stock for all dividend payment periods terminating on or prior to the date of such declaration, payment, redemption, purchase or acquisition. Notwithstanding the foregoing, if full dividends have not been paid on the Convertible Preferred Stock and any Parity Stock, dividends may be declared and paid on the Convertible Preferred Stock and such Parity Stock so long as the dividends are declared and paid pro rata so that the amounts of dividends declared per share on the Convertible Preferred Stock and such Parity Stock will in all cases bear to each other the same ratio that accumulated and unpaid dividends per share on the shares of the Convertible Preferred Stock and such Parity Stock bear to each other. Holders of shares of the Convertible Preferred Stock will not be entitled to any dividend, whether payable in cash, property or stock, in excess of full cumulative dividends. The Company's ability to declare and pay cash dividends and make other distributions with respect to its capital stock, including the Convertible Preferred Stock, is limited by the terms of the Company's outstanding indebtedness. In addition, the Company's ability to declare and pay dividends may be limited by applicable Oklahoma law. See "Risk Factors -- Risks Related to the Preferred Stock -- We may not be able to pay cash dividends on the preferred stock." LIQUIDATION PREFERENCE In the event of any voluntary or involuntary liquidation, winding-up or dissolution of the Company, each holder of Convertible Preferred Stock will be entitled to receive and to be paid out of the Company's assets available for distribution to its stockholders, before any payment or distribution is made to holders of Junior Stock (including common stock), a liquidation preference in the amount of $50 per share of the Convertible Preferred Stock, plus accumulated and unpaid dividends thereon to the date fixed for liquidation, winding-up or dissolution. If, upon any voluntary or involuntary liquidation, winding-up or dissolution of the Company, the amounts payable with respect to the liquidation preference of the Convertible Preferred Stock and all Parity Stock are not paid in full, the holders of the Convertible Preferred Stock and the Parity Stock will share equally and ratably in any distribution of assets of the Company in proportion to the full liquidation preference and accumulated and unpaid dividends to which they are entitled. After payment of the full amount of the liquidation preference and accumulated and unpaid dividends to which they are entitled, the holders of the Convertible Preferred Stock will have no right or claim to any of the remaining assets of the Company. Neither the sale of all or substantially all the assets or business of the Company (other than in connection with the liquidation, winding-up or dissolution of its business), nor the merger or consolidation of the Company into or with any other person, will be deemed to be a voluntary or involuntary liquidation, winding-up or dissolution of the Company. The certificate of designation does not contain any provision requiring funds to be set aside to protect the liquidation preference of the Convertible Preferred Stock even though it is substantially in excess of the par value thereof. VOTING RIGHTS The holders of the Convertible Preferred Stock have no voting rights except as set forth below or as otherwise required by Oklahoma law from time to time. 12

If dividends on the Convertible Preferred Stock are in arrears and unpaid for six or more quarterly periods (whether or not consecutive), the holders of the Convertible Preferred Stock, voting as a single class with any other preferred stock or preference securities having similar voting rights that are exercisable, will be entitled at the next regular or special meeting of stockholders of the Company to elect two additional directors of the Company unless the Board of Directors is comprised of fewer than six directors at such time, in which case such holders will be entitled to elect one additional director. Upon the election of any additional directors, the number of directors that compose the Board shall be increased by such number of additional directors. Such voting rights and the terms of the directors so elected will continue until such time as the dividend arrearage on the Convertible Preferred Stock has been paid in full. In addition, the affirmative vote or consent of the holders of at least 66 2/3% of the outstanding Convertible Preferred Stock is required for the issuance of any class or series of Senior Stock (or any security convertible into Senior Stock) of the Company and for amendments to the Company's certificate of incorporation that would affect adversely the rights of holders of the Convertible Preferred Stock. The certificate of designation provides that the authorization of, the increase in the authorized amount of, or the issuance of any shares of any class or series of Parity Stock or Junior Stock does not require the consent of the holders of the Convertible Preferred Stock, and is not deemed to affect adversely the rights of the holders of the Convertible Preferred Stock. In all cases in which the holders of Convertible Preferred Stock are entitled to vote, each share of Convertible Preferred Stock shall be entitled to one vote. CONVERSION RIGHTS Each share of Convertible Preferred Stock is convertible at any time at the option of the holder thereof into 6.4935 shares of common stock (which is calculated using an initial conversion price of $7.70 per share of common stock) subject to adjustment as described below (such price or adjusted price being referred to as the "Conversion Price"). With respect to any shares of Convertible Preferred Stock that are "restricted securities" on the date of conversion, the shares of common stock distributed upon conversion will be treated as "restricted securities," will bear a legend to such effect and will not be transferable by the recipient thereof except pursuant to an effective registration statement or pursuant to an exemption from the registration requirements of the Securities Act. All such shares will be issued in physical certificated form and will not be eligible for receipt in global form through the facilities of the Depositary. With respect to shares of Convertible Preferred Stock that are no longer "restricted securities" on a conversion date, either as a result of a resale of the Convertible Preferred Stock pursuant to the Shelf Registration Statement (as defined herein) or otherwise, all shares of common stock distributed upon conversion will be freely transferable without restriction under the Securities Act (other than by affiliates of the Company), and such shares will be eligible for receipt in global form through the facilities of the Depositary. The holders of shares of Convertible Preferred Stock at the close of business on a Record Date will be entitled to receive the dividend payment on those shares on the corresponding Dividend Payment Date notwithstanding the conversion of such shares following that Record Date or the Company's default in payment of the dividend due on that Dividend Payment Date. However, shares of Convertible Preferred Stock surrendered for conversion during the period between the close of business on any Record Date and the close of business on the business day immediately preceding the applicable Dividend Payment Date must be accompanied by payment of an amount equal to the dividend payable on such shares on that Dividend Payment Date. A holder of shares of Convertible Preferred Stock on a Record Date who (or whose transferee) tenders any shares for conversion on the corresponding Dividend Payment Date will receive the dividend payable by the Company on the Convertible Preferred Stock on that date, and the converting holder need not include payment in the amount of such dividend upon surrender of shares of Convertible Preferred Stock for conversion. Except as provided above with respect to a voluntary conversion, the Company will make no payment or allowance for unpaid dividends, whether or not in arrears, on converted shares or for dividends on the shares of common stock issued upon conversion. 13

MANDATORY CONVERSION At any time on or after November 20, 2004, the Company may at its option cause the Convertible Preferred Stock to be automatically converted into that number of shares of common stock for each share of Convertible Preferred Stock equal to $50.00 (the liquidation preference per share of Convertible Preferred Stock) divided by the then prevailing Conversion Price. The Company may exercise its right to cause a mandatory conversion only if the closing price of its common stock equals or exceeds 130% of the then prevailing Conversion Price for at least 20 trading days in any consecutive 30-day trading period, including the last trading day of such 30-day period, ending on the trading day prior to the Company's issuance of a press release announcing the mandatory conversion as described below. To exercise the mandatory conversion right described above, the Company must issue a press release for publication on the Dow Jones News Service prior to the opening of business on the first trading day following any date on which the conditions described in the preceding paragraph are met, announcing such a mandatory conversion. The Company will also give notice by mail or by publication (with subsequent prompt notice by mail) to the holders of the Convertible Preferred Stock (not more than four business days after the date of the press release) of the mandatory conversion announcing the Company's intention to convert the Convertible Preferred Stock. The conversion date will be a date selected by the Company (the "Mandatory Conversion Date") and will be no more than five days after the date on which the Company issues such press release. In addition to any information required by applicable law or regulation, the press release and notice of a mandatory conversion shall state, as appropriate: (i) the Mandatory Conversion Date; (ii) the number of shares of common stock to be issued upon conversion of each share of Convertible Preferred Stock; (iii) the number of shares of Convertible Preferred Stock to be converted; and (iv) that dividends on the Convertible Preferred Stock to be converted will cease to accrue on the Mandatory Conversion Date. On and after the Mandatory Conversion Date, dividends will cease to accrue on the Convertible Preferred Stock called for a mandatory conversion and all rights of holders of such Convertible Preferred Stock will terminate except for the right to receive the shares of common stock issuable upon conversion thereof. The dividend payment with respect to the Convertible Preferred Stock called for a mandatory conversion on a date during the period between the close of business on any Record Date for the payment of dividends to the close of business on the corresponding Dividend Payment Date will be payable on such Dividend Payment Date to the record holder of such share on such Record Date if such share has been converted after such Record Date and prior to such Dividend Payment Date. Except as provided in the immediately preceding sentence with respect to a mandatory conversion, no payment or adjustment will be made upon conversion of Convertible Preferred Stock for accumulated and unpaid dividends or for dividends with respect to the common stock issued upon such conversion. The Company may not authorize, issue a press release or give notice of any mandatory conversion unless, prior to giving the conversion notice, all accumulated and unpaid dividends on the Convertible Preferred Stock for periods ended prior to the date of such conversion notice shall have been paid in cash. In addition to the mandatory conversion provision described above, if there are less than 250,000 shares of Convertible Preferred Stock outstanding, the Company may, at any time on or after November 20, 2006, at its option, cause the Convertible Preferred Stock to be automatically converted into that number of shares of common stock equal to $50.00 (the liquidation preference per share of Convertible Preferred Stock) divided by the lesser of the then prevailing Conversion Price and the Market Value (as defined below under "-- Conversion Price Adjustment") for the five trading day period ending on the second trading day immediately prior to the Mandatory Conversion Date. The provisions of the immediately preceding four paragraphs shall apply to any such mandatory conversion; provided that (i) the Mandatory Conversion Date will not be less than 15 days nor more than 30 days after the date on which the Company issues a press release 14

announcing such mandatory conversion and (ii) the press release and notice of mandatory conversion will not state the number of shares of common stock to be issued upon conversion of each share of Convertible Preferred Stock. FRACTIONAL SHARES No fractional shares of common stock or securities representing fractional shares of common stock will be issued upon conversion, whether voluntary or mandatory. Any fractional interest in a share of common stock resulting from conversion will be paid in cash based on the last reported sale price of the common stock on the New York Stock Exchange (or such other national securities exchange or automated quotation system on which the common stock is then listed or authorized for quotation or, if not so listed or authorized for quotation, an amount determined in good faith by the Board of Directors to be the fair value of the common stock) at the close of business on the trading day next preceding the date of conversion. CONVERSION PRICE ADJUSTMENT The Conversion Price is subject to adjustment (in accordance with formulas set forth in the certificate of designation) in certain events, including: (i) any payment of a dividend (or other distribution) payable in shares of common stock on any class of capital stock of the Company (other than the issuance of shares of common stock in connection with the payment in conversion of Convertible Preferred Stock); (ii) any issuance to all holders of shares of common stock of rights, options or warrants entitling them to subscribe for or purchase shares of common stock or securities convertible into or exchangeable for shares of common stock at less than the Market Value (as defined below) for the period ending on the date of issuance; provided, however, that no adjustment shall be made with respect to such a distribution if the holder of shares of Convertible Preferred Stock would be entitled to receive such rights, options or warrants upon conversion at any time of shares of Convertible Preferred Stock into common stock and provided further, however, that if such rights, options or warrants are only exercisable upon the occurrence of certain triggering events, then the Conversion Price will not be adjusted until such triggering events occur; (iii) any subdivision, combination or reclassification of the common stock; (iv) any dividend or distribution to all holders of shares of common stock (other than a dividend or distribution referred to in (ii) above) made pursuant to any shareholder rights plan, "poison pill" or similar arrangement and excluding dividends payable upon the Convertible Preferred Stock; (v) any distribution consisting exclusively of cash (excluding any cash portion of distributions referred to in (iv) above, or cash distributed upon a merger or consolidation to which the fourth succeeding paragraph applies) to all holders of shares of common stock in an aggregate amount that, combined together with (a) all other such all-cash distributions made within the then-preceding 12-months in respect of which no adjustment has been made and (b) any cash and the fair market value of other consideration paid or payable in respect of any tender offer by the Company or any of its subsidiaries for shares of common stock concluded within the then-preceding 12-months in respect of which no adjustment has been made, exceeds 15% of the Company's market capitalization (defined as the product of the then-current market price of the common stock times the number of shares of common stock then outstanding) on the record date of such distribution; (vi) the completion of a tender or exchange offer made by the Company or any of its subsidiaries for shares of common stock that involves an aggregate consideration that, together with (a) any cash and other consideration payable in a tender or exchange offer by the Company or any of its subsidiaries for shares of common stock expiring within the then-preceding 12-months in respect of which no adjustment has been made and (b) the aggregate amount of any such all-cash distributions referred to in (v) above to all holders of shares of common stock within the then-preceding 12-months in respect of which no 15

adjustments have been made, exceeds 15% of the Company's market capitalization on the expiration of such tender offer; or (vii) a distribution to all holders of common stock consisting of evidences of indebtedness, shares of capital stock other than common stock or assets (including securities, but excluding those dividends, rights, options, warrants and distributions referred to above). No adjustment of the Conversion Price will be required to be made until the cumulative adjustments (whether or not made) amount to 1.0% or more of the Conversion Price as last adjusted. The Company reserves the right to make such reductions in the Conversion Price in addition to those required in the foregoing provisions as it considers to be advisable in order that any event treated for Federal income tax purposes as a dividend of stock or stock rights will not be taxable to the recipients. In the event the Company elects to make such a reduction in the Conversion Price, the Company will comply with the requirements of securities laws and regulations thereunder if and to the extent that such laws and regulations are applicable in connection with the reduction of the Conversion Price. The term "Market Value" means the average closing price of the common stock for a five consecutive trading day period on the New York Stock Exchange (or such other national securities exchange or automated quotation system on which the common stock is then listed or authorized for quotation or, if not so listed or authorized for quotation, an amount determined in good faith by the Board of Directors to be the fair value of the common stock). In the event that the Company distributes rights or warrants (other than those referred to in (ii) above) pro rata to holders of shares of common stock, so long as any such rights or warrants have not expired or been redeemed by the Company, the holder of any Convertible Preferred Stock surrendered for conversion will be entitled to receive upon such conversion, in addition to the shares of common stock then issuable upon such conversion (the "Conversion Shares"), a number of rights or warrants to be determined as follows: (i) if such conversion occurs on or prior to the date for the distribution to the holders of rights or warrants of separate certificates evidencing such rights or warrants (the "Distribution Date"), the same number of rights or warrants to which a holder of a number of shares of common stock equal to the number of Conversion Shares is entitled at the time of such conversion in accordance with the terms and provisions applicable to the rights or warrants; and (ii) if such conversion occurs after such Distribution Date, the same number of rights or warrants to which a holder of the number of shares of common stock into which such Convertible Preferred Stock was convertible immediately prior to such Distribution Date would have been entitled on such Distribution Date had such Convertible Preferred Stock been converted immediately prior to such Distribution Date in accordance with the terms and provisions applicable to the rights or warrants. The Conversion Price will not be subject to adjustment on account of any declaration, distribution or exercise of such rights or warrants. Following any reclassification, consolidation or merger of the Company with or into another person or any merger of another person with or into the Company (with certain exceptions), or any sale or other disposition of all or substantially all of the assets of the Company (computed on a consolidated basis), each share of Convertible Preferred Stock then outstanding will, without the consent of any holder of Convertible Preferred Stock, be convertible at any time at the option of the holder thereof only into the kind and amount of securities, cash and other property receivable upon such reclassification, consolidation, merger, sale or other disposition by a holder of the number of shares of common stock into which such Convertible Preferred Stock was convertible immediately prior thereto, after giving effect to any adjustment event. CHANGE OF CONTROL Except as provided below, upon a Change of Control (as defined below), holders of Convertible Preferred Stock shall, in the event that the Market Value at such time is less than the Conversion Price, have a one-time option to convert all of their outstanding shares of Convertible Preferred Stock into shares of common stock at 16

an adjusted Conversion Price equal to the greater of (i) the Market Value (as defined above under "-- Conversion Rights") as of the Change of Control Date and (ii) $4.0733. This option shall be exercisable during a period of not less than 30 days nor more than 60 days commencing on the third business day after notice of the Change of Control is given by the Company in the manner specified in the certificate of designation. In lieu of issuing the shares of common stock issuable upon conversion in the event of a Change of Control, the Company may, at its option, make a cash payment equal to the Market Value for each share of such common stock otherwise issuable determined for the period ending on the Change of Control Date. Notwithstanding the foregoing, upon a Change of Control in which (x) each holder of common stock of the Company receives consideration consisting solely of common stock of the successor, acquiror or other third party (and cash paid in lieu of fractional shares) that is listed on a national securities exchange or quoted on the NASDAQ National Market and (y) all the common stock of the Company has been exchanged for, converted into or acquired for common stock of the successor, acquiror or other third party (and cash in lieu of fractional shares), and the Convertible Preferred Stock becomes convertible solely into such common stock, the Conversion Price will not be adjusted as described in this paragraph. The certificate of designation defines "Change of Control" as any of the following events: (i) the sale, lease or transfer, in one or a series of related transactions, of all or substantially all of the Company's assets (determined on a consolidated basis) to any person or group (as such term is used in Section 13(d)(3) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), other than to Permitted Holders; (ii) the adoption of a plan the consummation of which would result in the liquidation or dissolution of the Company; (iii) the acquisition, directly or indirectly, by any person or group (as such term is used in Section 13(d)(3) of the Exchange Act), other than Permitted Holders, of beneficial ownership (as defined in Rule 13d-3 under the Exchange Act) of more than 50% of the aggregate voting power of the voting stock of the Company; provided, however, that the Permitted Holders beneficially own (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, in the aggregate a lesser percentage of the total voting power of the voting stock of the Company than such other person and do not have the right or ability by voting power, contract or otherwise to elect or designate for election a majority of the Board of Directors (for the purposes of this definition, such other person shall be deemed to beneficially own any voting stock of a specified corporation held by a parent corporation, if such other person is the beneficial owner (as defined above), directly or indirectly, of more than 35% of the voting power of the voting stock of such parent corporation and the Permitted Holders beneficially own (as defined in this proviso), directly or indirectly, in the aggregate a lesser percentage of the voting power of the voting stock of such parent corporation and do not have the right or ability by voting power, contract or otherwise to elect or designate for election a majority of the Board of Directors of such parent corporation); or (iv) during any period of two consecutive years, individuals who at the beginning of such period composed the Board of Directors (together with any new directors whose election by such Board of Directors or whose nomination for election by the shareholders of the Company was approved by a vote of 66 2/3% of the directors of the Company then still in office who were either directors at the beginning of such period or whose election or nomination for election was previously so approved) cease for any reason to constitute a majority of the Board of Directors then in office. For purposes of the definition of "Change of Control," the term "Permitted Holders" means Aubrey K. McClendon and Tom L. Ward and their respective Affiliates. The phrase "all or substantially all" of the assets of the Company is likely to be interpreted by reference to applicable state law at the relevant time, and will be dependent on the facts and circumstances existing at such time. As a result, there may be a degree of uncertainty in ascertaining whether a sale or transfer is of "all or substantially all" of the assets of the Company. 17

CONSOLIDATION, MERGER AND SALE OF ASSETS The certificate of designation provides that the Company, without the consent of the holders of any of the outstanding Convertible Preferred Stock, may consolidate with or merge into any other person or convey, transfer or lease all or substantially all its assets to any person or may permit any person to consolidate with or merge into, or transfer or lease all or substantially all its properties to, the Company; provided, however that (a) the successor, transferee or lessee is organized under the laws of the United States or any political subdivision thereof; (b) the shares of Convertible Preferred Stock will become shares of such successor, transferee or lessee, having in respect of such successor, transferee or lessee the same powers, preferences and relative participating, optional or other special rights and the qualification, limitations or restrictions thereon, the Convertible Preferred Stock had immediately prior to such transaction; and (c) certain other conditions are met. Under any consolidation by the Company with, or merger by the Company into, any other person or any conveyance, transfer or lease of all or substantially all the assets of the Company as described in the preceding paragraph, the successor resulting from such consolidation or into which the Company is merged or the transferee or lessee to which such conveyance, transfer or lease is made, will succeed to, and be substituted for, and may exercise every right and power of, the Company under the shares of Convertible Preferred Stock, and thereafter, except in the case of a lease, the predecessor (if still in existence) will be released from its obligations and covenants with respect to the Convertible Preferred Stock. SEC REPORTS Whether or not the Company is required to file reports with the SEC, if any shares of Convertible Preferred Stock are outstanding, the Company shall file with the SEC all such reports and other information as it would be required to file with the SEC by Sections 13(a) or 15(d) under the Exchange Act. See "Where You Can Find More Information." The Company shall supply each holder of Convertible Preferred Stock, upon request, without cost to such holder, copies of such reports or other information. DESCRIPTION OF CHESAPEAKE CAPITAL STOCK The description of our capital stock set forth below is not complete and is qualified by reference to our certificate of incorporation (including our certificates of designation) and bylaws. Copies of our certificate of incorporation (including our certificates of designation) and bylaws are available from us upon request these documents have also been filed with the SEC. See "Where You Can Find More Information." AUTHORIZED CAPITAL STOCK Our authorized capital stock consists of 350,000,000 shares of common stock, par value $.01 per share, and 10,000,000 shares of preferred stock, par value $.01 per share, of which 250,000 shares are designated as Series A Junior Participating Preferred Stock. COMMON STOCK Holders of our common stock are entitled to one vote for each share held of record on all matters submitted to a vote of shareholders. Subject to preferences that may be applicable to any outstanding preferred stock, holders of our common stock are entitled to receive ratably such dividends as may be declared by the board of directors out of funds legally available for dividends. In the event of our liquidation or dissolution, holders of our common stock are entitled to share ratably in all assets remaining after payment of liabilities and the liquidation preference of any outstanding preferred stock. Holders of our common stock have no preemptive rights and have no rights to convert their common stock into any other securities. All of the outstanding shares of common stock are duly authorized, validly issued, fully paid and nonassessable. 18

PREFERRED STOCK The Series A Preferred Stock is described below under "-- Share Rights Plan." We have 6,750,000 shares of authorized preferred stock which are undesignated. 3,000,000 shares are designated as 6.75% Cumulative Convertible Preferred Stock. Our board of directors has the authority, without further shareholder approval, to issue shares of preferred stock from time to time in one or more series, with such voting powers or without voting powers, and with such designations, preferences and relative, participating, optional or other special rights, and qualifications, limitations or restrictions, as shall be set forth in the resolutions providing thereof. While providing desirable flexibility for possible acquisitions and other corporate purposes, and eliminating delays associated with a shareholder vote on specific issuances, the issuance of preferred stock could adversely affect the voting power of holders of common stock, as well as dividend and liquidation payments on both common and preferred stock. It also could have the effect of delaying, deferring or preventing a change in control. ANTI-TAKEOVER PROVISIONS Our certificate of incorporation and bylaws and the Oklahoma General Corporation Act include a number of provisions which may have the effect of encouraging persons considering unsolicited tender offers or other unilateral takeover proposals to negotiate with our board of directors rather than pursue non-negotiated takeover attempts. These provisions include a classified board of directors, authorized blank check preferred stock, restrictions on business combinations and the availability of authorized but unissued common stock. Classified Board of Directors. Our certificate of incorporation and bylaws contain provisions for a staggered board of directors with only one-third of the board standing for election each year. Directors can only be removed for cause. A staggered board makes it more difficult for shareholders to change the majority of the directors. Oklahoma Business Combination Statute. Section 1090.3 of the Oklahoma General Corporation Act prevents an "interested shareholder" from engaging in a "business combination" with an Oklahoma corporation for three years following the date the person became an interested shareholder, unless: - prior to the date the person became an interested shareholder, the board of directors of the corporation approved the transaction in which the interested shareholder became an interested shareholder or approved the business combination; - upon consummation of the transaction that resulted in the interested shareholder becoming an interested shareholder, the interested shareholder owns stock having at least 85% of all voting power of the corporation at the time the transaction commenced, excluding stock held by directors who are also officers of the corporation and stock held by certain employee stock plans; or - on or subsequent to the date of the transaction in which the person became an interested shareholder, the business combination is approved by the board of directors of the corporation and authorized at a meeting of shareholders by the affirmative vote of the holders of two-thirds of all voting power not attributable to shares owned by the interested shareholder. - The statute defines a "business combination" to include: - any merger or consolidation involving the corporation and an interested shareholder; - any sale, lease, exchange, mortgage, pledge, transfer or other disposition to or with an interested shareholder of 10% or more of the assets of the corporation; - subject to certain exceptions, any transaction which results in the issuance or transfer by the corporation of any stock of the corporation to an interested shareholder; 19

- any transaction involving the corporation which has the effect of increasing the proportionate share of the stock of any class or series or voting power of the corporation owned by the interested shareholder; - the receipt by an interested shareholder of any loans, guarantees, pledges or other financial benefits provided by or through the corporation; or - any share acquisition by the interested shareholder pursuant to Section 1090.1 of the Oklahoma General Corporation Act. For purposes of Section 1090.3, the term "corporation" also includes the corporation's majority-owned subsidiaries. In addition, Section 1090.3 defines an "interested shareholder," generally, as any person that owns stock having 15% or more of all voting power of the corporation, any person that is an affiliate or associate of the corporation and owned stock having 15% or more of all voting power of the corporation at any time within the three-year period prior to the time of determination of interested shareholder status, and any affiliate or associate of such person. Stock Purchase Provisions. Our certificate of incorporation includes a provision which requires the affirmative vote of two-thirds of the votes cast by the holders, voting together as a single class, of all then outstanding shares of capital stock, excluding the votes by an interested shareholder, to approve the purchase of any of our capital stock from the interested shareholder at a price in excess of fair market value, unless the purchase is either (1) made on the same terms offered to all holders of the same securities or (2) made on the open market and not the result of a privately negotiated transaction. SHARE RIGHTS PLAN The Rights. On July 7, 1998, our board of directors declared a dividend distribution of one preferred stock purchase right for each outstanding share of common stock. The distribution was paid on July 27, 1998 to the shareholders of record on that date. Each right entitles the registered holder to purchase from us one one-thousandth of a share of Series A Preferred Stock at a price of $25.00, subject to adjustment. The following is a summary of these rights. The full description and terms of the rights are set forth in a rights agreement with UMB Bank, N.A., as rights agent. Copies of the rights agreement and the certificate of designation for the Series A Preferred Stock are available free of charge. This summary description of the rights and the Series A Preferred Stock does not purport to be complete and is qualified in its entirety by reference to all the provisions of the rights agreement and the certificate of designation for the Series A Preferred Stock. Initially, the rights attached to all certificates representing shares of our outstanding common stock, and no separate rights certificates were distributed. The rights will separate from our common stock and the distribution date will occur upon the earlier of: - ten days following the date of public announcement that a person or group of persons has become an acquiring person; or - ten business days (or a later date set by the board of directors prior to the time a person becomes an acquiring person) following the commencement of, or the announcement of an intention to make, a tender offer or exchange offer upon consummation of which the offeror would, if successful, become an acquiring person. The earlier of these dates is called the distribution date. The term "acquiring person" means any person who or which, together with all of its affiliates and associates, is the beneficial owner of 15% or more of our outstanding common stock, but does not include: - us or any of our subsidiaries or employee benefit plans; - Aubrey K. McClendon, his spouse, lineal descendants and ascendants, heirs, executors or other legal representatives and any trusts established for the benefit of the foregoing or any other person or entity in which the foregoing persons or entities are at the time of determination the direct record and beneficial owners of all outstanding voting securities (each a "McClendon shareholder"); 20

- Tom L. Ward, his spouse, lineal descendants and ascendants, heirs, executors or other legal representatives and any trusts established for the benefit of the foregoing, or any other person or entity in which the foregoing persons or entities are at the time of determination the direct record and beneficial owners of all outstanding voting securities (each a "Ward shareholder"), - Morgan Guaranty Trust Company of New York, in its capacity as pledgee of shares beneficially owned by a McClendon or Ward shareholder, or both, under any pledge agreement in effect on September 11, 1998, to the extent that upon the exercise by the pledgee of any of its rights or duties as pledgee, other than the exercise of any voting power by the pledgee or the acquisition of ownership by the pledgee, such pledgee becomes a beneficial owner of pledged shares, or - any person (other than the pledgee just described) that is neither a McClendon nor Ward shareholder, but who or which is the beneficial owner of common stock beneficially owned by a McClendon or Ward shareholder (a "second tier shareholder"), but only if the shares of common stock otherwise beneficially owned by a second tier shareholder ("second tier holder shares") do not exceed the sum of (A) the holder's second tier holder shares held on September 11, 1998 and (B) 1% of the shares of our common stock then outstanding (collectively, "exempt persons"). The rights agreement provides that, until the distribution date, the rights will be transferred with and only with the common stock. Until the distribution date (or earlier redemption or expiration of the rights), new common stock certificates issued after July 27, 1998, upon transfer or new issuance of common stock, will contain a notation incorporating the rights agreement by reference. Until the distribution date or earlier redemption or expiration of the rights, the surrender for transfer of any certificate for common stock, outstanding as of July 27, 1998, even without a notation or a copy of a summary of the rights being attached, will also constitute the transfer of the rights associated with the common stock represented by the certificate. As soon as practicable following the distribution date, separate certificates evidencing the rights will be mailed to holders of record of the common stock as of the close of business on the distribution date and these separate rights certificates alone will evidence the rights. The rights are not exercisable until the distribution date. The rights will expire on July 27, 2008. The purchase price payable, and the number of one one-thousandths of a share of Series A Preferred Stock or other securities or property issuable, upon exercise of the rights are subject to adjustment from time to time to prevent dilution: - in the event of a stock dividend on, or a subdivision, combination or reclassification of, the Series A Preferred Stock; - upon the grant to holders of the Series A Preferred Stock of certain rights or warrants to subscribe for or purchase shares of Series A Preferred Stock at a price, or securities convertible into Series A Preferred Stock with a conversion price, less than the then current market price of the Series A Preferred Stock; or - upon the distribution to holders of the Series A Preferred Stock of evidences of indebtedness or assets (excluding regular periodic cash dividends paid or dividends payable in Series A Preferred Stock) or of subscription rights or warrants (other than those referred to above). The number of outstanding rights and the number of one one-thousandths of a share of Series A Preferred Stock issuable upon exercise of each right are also subject to adjustment in the event of a stock split of the common stock or a stock dividend on the common stock payable in the common stock or subdivisions, consolidations or combinations of the common stock occurring, in any such case, prior to the distribution date. In the event that following the date of public announcement that an acquiring person has become an acquiring person, we are acquired in a merger or other business combination transaction or more than 50% of our consolidated assets or earning power is sold, proper provision will be made so that each holder of a right will thereafter have the right to receive, upon the exercise of the right at the then current exercise price of the right, that number of shares of common stock of the acquiring company which at the time of such transaction will have a market value of two times the exercise price of the right (the "flip-over right"). 21

In the event that a person, other than an exempt person, becomes an acquiring person, proper provision will be made so that each holder of a right, other than the acquiring person and its affiliates and associates, will thereafter have the right to receive upon exercise that number of shares of common stock, or, if applicable, cash, other equity securities or property of us, having a market value equal to two times the purchase price of the rights (the "flip-in right"). Any rights that are or were at any time owned by an acquiring person will then become void. With certain exceptions, no adjustment in the purchase price will be required until cumulative adjustments require an adjustment of at least 1% in the purchase price. Upon exercise of the rights, no fractional shares of Series A Preferred Stock will be issued other than fractions which are integral multiples of one one-hundredth of a share of Series A Preferred Stock. Cash will be paid in lieu of fractional shares of Series A Preferred Stock that are not integral multiples of one one-hundredth of a share of Series A Preferred Stock. At any time prior to the earlier to occur of (1) 5:00 p.m., Oklahoma City, Oklahoma time on the tenth day after the stock acquisition date or (2) the expiration of the rights, we may redeem the rights in whole, but not in part, at a price of $0.01 per right; provided, that (a) if the board of directors authorizes redemption on or after the time a person becomes an acquiring person, then the authorization must be by board approval and (b) the period for redemption may, upon board approval, be extended by amending the rights agreement. Board approval means the approval of a majority of our directors. Immediately upon any redemption of the rights described in this paragraph, the right to exercise the rights will terminate and the only right of the holders of rights will be to receive the redemption price. Our board of directors may amend the terms of the rights without the consent of the holders of the rights at any time and from time to time provided that any amendment does not adversely affect the interests of the holders of the rights. In addition, during any time that the rights are subject to redemption, the terms of the rights may be amended by the approval of a majority of the directors, including an amendment that adversely affects the interests of the holders of the rights, without the consent of the holders of rights. Until a right is exercised, a holder will have no rights as a shareholder, including, without limitation, the right to vote or to receive dividends. While the distribution of the rights will not be taxable to us or our shareholders, shareholders may, depending upon the circumstances, recognize taxable income in the event that the rights become exercisable for Series A Preferred Stock, or other consideration. The Series A Preferred Stock. Each one-thousandth of a share of the Series A Preferred Stock (a "preferred share fraction") that may be acquired upon exercise of the rights will be nonredeemable and junior to any other shares of preferred stock that we may issue. Each preferred share fraction will have a minimum preferential quarterly dividend rate of $0.01 per preferred share fraction but will, in any event, be entitled to a dividend equal to the per share dividend declared on the common stock. In the event of liquidation, the holder of a preferred share fraction will receive a preferred liquidation payment equal to the greater of $0.01 per preferred share fraction or the per share amount paid in respect of a share of common stock. Each preferred share fraction will have one vote, voting together with the common stock. The holders of preferred share fractions, voting as a separate class, will be entitled to elect two directors if dividends on the Series A Preferred Stock are in arrears for six fiscal quarters. In the event of any merger, consolidation or other transaction in which shares of common stock are exchanged, each preferred share fraction will be entitled to receive the per share amount paid in respect of each share of common stock. The rights of holders of the Series A Preferred Stock to dividends, liquidation and voting, and in the event of mergers and consolidations, are protected by customary antidilution provisions. 22

Because of the nature of the Series A Preferred Stock's dividend, liquidation and voting rights, the economic value of one preferred share fraction that may be acquired upon the exercise of each right should approximate the economic value of one share of our common stock. SHAREHOLDER ACTION Except as otherwise provided by law or in our certificate of incorporation or bylaws, the approval by holders of a majority of the shares of common stock present in person or represented by proxy at a meeting and entitled to vote is sufficient to authorize, affirm, ratify or consent to a matter voted on by shareholders. Our bylaws provide that all questions submitted to shareholders will be decided by a plurality of the votes cast, unless otherwise required by law, our certificate of incorporation, stock exchange requirements or any certificate of designation. The Oklahoma General Corporation Act requires the approval of the holders of a majority of the outstanding stock entitled to vote for certain extraordinary corporate transactions, such as a merger, sale of substantially all assets, dissolution or amendment of the certificate of incorporation. Our certificate of incorporation provides for a vote of the holders of two-thirds of the issued and outstanding stock having voting power, voting as a single class, to amend, repeal or adopt any provision inconsistent with the provisions of the certificate of incorporation limiting director liability and stock purchases by us, and providing for staggered terms of directors and indemnity for directors. The same vote is also required for shareholders to amend, repeal or adopt any provision of our bylaws. Under Oklahoma law, shareholders may take actions without the holding of a meeting by written consent or consents signed by the holders of a sufficient number of shares to approve the transaction had all of the outstanding shares of our capital stock entitled to vote thereon been present at a meeting. If shareholder action is taken by written consent, the rules and regulations of the SEC require us to send each shareholder entitled to vote on the matter, but whose consent was not solicited, an information statement containing information substantially similar to that which would have been contained in a proxy statement. TRANSFER AGENT AND REGISTRAR UMB Bank, N.A. is the transfer agent and registrar for our common stock and the Convertible Preferred Stock. FEDERAL INCOME TAX CONSIDERATIONS The following discussion summarizes the material U.S. Federal income tax consequences to U.S. holders (as defined below) of the purchase, ownership, and disposition of the preferred stock and any common stock received upon its conversion. This discussion is based upon the provisions of the Internal Revenue Code of 1986, as amended (the "Code"), the final, temporary and proposed Treasury Regulations promulgated thereunder, and administrative rulings and judicial decisions now in effect, all of which are subject to change (possibly with retroactive effect) or different interpretations. This summary does not purport to deal with all aspects of U.S. Federal income taxation that may be relevant to an investor's decision to purchase shares of preferred stock, nor any tax consequences arising under the laws of any state, locality or foreign jurisdiction. This summary is not intended to be applicable to all categories of investors, such as dealers in securities, banks, insurance companies, tax-exempt organizations, foreign persons, persons that hold the preferred stock or common stock as part of a straddle or conversion transaction, or holders subject to the alternative minimum tax, which may be subject to special rules. In addition, this discussion is limited to persons who hold the preferred stock or common stock as "capital assets" (generally, property held for investment) within the meaning of Section 1221 of the Code. As used in this section, a "U.S. holder" is a beneficial owner of preferred stock or common stock that is for U.S. Federal income tax purposes: - an individual U.S. citizen or resident alien; - a corporation, or entity taxable as a corporation that was created under U.S. law (federal or state); or - an estate or trust whose world-wide income is subject to U.S. Federal income tax. 23

If a partnership holds preferred stock or common stock, the tax treatment of a partner will generally depend upon the status of the partner and upon the activities of the partnership. YOU SHOULD CONSULT YOUR OWN TAX ADVISOR REGARDING THE FEDERAL, STATE, LOCAL, AND FOREIGN TAX CONSEQUENCES OF THE PURCHASE, OWNERSHIP, CONVERSION, AND DISPOSITION OF PREFERRED STOCK AND COMMON STOCK RECEIVED AS A RESULT OF A CONVERSION OF PREFERRED STOCK. CONSEQUENCES TO HOLDERS OF PREFERRED STOCK OR COMMON STOCK Distributions. The amount of any distribution to you with respect to preferred stock or common stock will be treated as a dividend, taxable as ordinary income to you, to the extent of our current or accumulated earnings and profits ("earnings and profits") as determined under U.S. Federal income tax principles. To the extent the amount of such distribution exceeds our earnings and profits, the excess will be applied against and will reduce your tax basis (on a dollar-for-dollar basis) in the preferred stock or common stock, as the case may be. Any amount in excess of your tax basis will be treated as capital gain. If we are not able to pay dividends on the preferred stock, the accreted liquidation preference of the preferred stock will increase and such increase may give rise to deemed dividend income to holders of the preferred stock in the amount of all, or a portion of, such increase. Dividends to Corporate Shareholders. In general, a distribution which is treated as a dividend for U.S. Federal income tax purposes and is made to a corporate shareholder with respect to the preferred stock or common stock will qualify for the 70% dividends-received deduction under Section 243 of the Code. Corporate shareholders should note, however, there can be no assurance that the amount of distributions made with respect to the preferred stock or the common stock will not exceed the amount of our earnings and profits in the future. Accordingly, there, can be no assurance that the dividends-received deduction will be available in respect of distributions on the preferred stock or common stock. In addition, there are many exceptions and restrictions relating to the availability of such dividends-received deduction such as restrictions relating to: - the holding period of stock the dividends on which are sought to be deducted; - debt-financed portfolio stock; - dividends treated as "extraordinary dividends" for purposes of Section 1059 of the Code; and - taxpayers that pay corporate alternative minimum tax. Corporate shareholders should consult their own tax advisors regarding the extent, if any, to which such exceptions and restrictions may apply to their particular factual situation. Sale or Other Disposition; Redemption. Upon a sale or other disposition of preferred stock or common stock (other than an exchange of preferred stock for common stock pursuant to the conversion privilege), you generally will recognize capital gain or loss equal to the difference between the amount of cash and the fair market value of property you receive on the sale or other disposition and your adjusted tax basis in the preferred stock or common stock. Such capital gain or loss will be long-term capital gain or loss if your holding period for the preferred stock or common stock, as applicable, is more than one year. If, following a change of control, a holder of the preferred stock exercises the option described in "Description of Preferred Stock -- Change of Control" and we elect to satisfy payment in cash, the transaction will generally be treated as a redemption for U.S. Federal income tax purposes. The U.S. Federal income tax treatment of such a redemption to a holder will depend on the particular facts relating to such holder at the time of the redemption. The receipt of cash in connection with such redemption will be treated as gain or loss from the sale or other disposition of the preferred stock (as discussed in the preceding paragraph), 24

if, taking into account stock that is actually or constructively owned as determined under Section 318 of the Code: - your interest in our common and preferred stock is completely terminated as a result of such redemption; - your percentage ownership in our voting stock immediately after such redemption is less than 80% of your percentage ownership immediately before such redemption; or - such redemption is "not essentially equivalent to a dividend" (within the meaning of Section 302(b)(1) of the Code). If none of the above tests giving rise to sale treatment is satisfied, then a payment made in redemption of the preferred stock will be treated as a distribution that is taxable in the same manner as described above under "Distributions," and your adjusted tax basis in the redeemed preferred stock will be transferred to any remaining shares you hold in us. If you do not retain any stock ownership in us following such redemption, then you may lose your basis completely. Conversion of Preferred Stock in Exchange for Common Stock. You generally will not recognize gain or loss by reason of receiving common stock in exchange for preferred stock upon conversion of the preferred stock, except gain or loss will be recognized with respect to any cash received in lieu of fractional shares and the fair market value of any shares of common stock attributable to dividend arrearages will be treated as a constructive distribution as described above under "Distributions." The adjusted tax basis of the common stock (including fractional share interests) so acquired will be equal to the tax basis of the shares of preferred stock exchanged and the holding period of the common stock received will include the holding period of the preferred stock exchanged. The tax basis of any common stock treated as a constructive distribution will be equal to its fair market value on the date of the exchange. Adjustment of Conversion Price. Holders of preferred stock may, in certain circumstances, be deemed to have received constructive distributions of stock if the conversion rate for the preferred stock is adjusted. Adjustments to the conversion price made pursuant to a bona fide reasonable adjustment formula which has the effect of preventing the dilution of the interest of the holders of the preferred stock, however, generally will not be considered to result in a constructive distribution of stock. Certain of the possible adjustments provided in the anti-dilution provisions of the preferred stock, including, without limitation, adjustments in respect of stock dividends or the distribution of rights to subscribe for common stock should qualify as being pursuant to a bona fide reasonable adjustment formula and should not result in a constructive distribution. In contrast, adjustments in respect of distributions of our indebtedness or assets to our stockholders, for example, will not qualify as being pursuant to a bona fide reasonable adjustment formula. In addition, an adjustment triggered by a change of control as described under "Description of Preferred Stock" may not so qualify. If such adjustments are made, the holders generally will be deemed to have received constructive distributions in amounts based upon the value of such holders' increased interests in our equity resulting from such adjustments. The amount of the distribution will be treated as a distribution to a holder with the tax consequences specified above under "Distributions." Accordingly, you could be considered to have received distributions taxable as dividends to the extent of our earnings and profits even though you did not receive any cash or property as a result of such adjustments. Conversion of Preferred Stock After Dividend Record Date. If a holder exercises its right to convert the preferred stock into shares of common stock after a dividend record date but before payment of the dividend, then upon conversion, the holder generally will be required to pay to us in cash an amount equal to the portion of such dividend attributable to the current quarterly dividend period, which amount would increase the tax basis of the common stock received. When the dividend is received, the holder would recognize the dividend payment in accordance with the rules described under "-- Distributions" above. 25

Backup Withholding. Under the backup withholding provisions of the Code and applicable Treasury Regulations, you may be subject to backup withholding at a maximum rate of 30.5% with respect to dividends paid on, or the proceeds of a sale, exchange or redemption of, preferred stock or common stock unless: - you are a corporation or come within certain other exempt categories and when required demonstrate this fact, or - within a reasonable period of time, you provide a taxpayer identification number, certify as to no loss of exemption from backup withholding, and otherwise comply with applicable requirements of the backup withholding rules. The amount of any backup withholding from a payment to you will be allowed as a credit against your U.S. Federal income tax liability and may entitle you to a refund, provided that the required information is furnished to the Internal Revenue Service. THE FOREGOING SUMMARY DOES NOT DISCUSS ALL ASPECTS OF U.S. FEDERAL INCOME TAXATION THAT MAY BE RELEVANT TO YOU IN LIGHT OF YOUR PARTICULAR CIRCUMSTANCES AND INCOME TAX SITUATION. YOU SHOULD CONSULT YOUR OWN TAX ADVISOR AS TO THE SPECIFIC TAX CONSEQUENCES THAT WOULD RESULT FROM YOUR PURCHASE, OWNERSHIP AND DISPOSITION OF THE PREFERRED STOCK, INCLUDING THE APPLICATION AND EFFECT OF STATE, LOCAL, FOREIGN AND OTHER TAX LAWS AND THE POSSIBLE EFFECTS OF CHANGES IN FEDERAL OR OTHER TAX LAWS. NOTICE TO CANADIAN RESIDENTS RIGHTS OF ACTION (ONTARIO PURCHASERS) The securities being offered are those of a foreign issuer and Ontario purchasers will not receive the contractual right of action prescribed by Ontario securities law. As a result, Ontario purchasers must rely on other remedies that may be available, including common law rights of action for damages or rescission or rights of action under the civil liability provisions of the U.S. federal securities laws. ENFORCEMENT OF LEGAL RIGHTS All of the issuer's directors and officers as well as the experts named herein may be located outside of Canada and, as a result, it may not be possible for Canadian purchasers to effect service of process within Canada upon the issuer or such persons. All or a substantial portion of the assets of the issuer and such persons may be located outside of Canada and, as a result, it may not be possible to satisfy a judgment against the issuer or such persons in Canada or to enforce a judgment obtained in Canadian courts against such issuer or persons outside of Canada. NOTICE TO BRITISH COLUMBIA RESIDENTS A purchaser of preferred stock to whom the Securities Act (British Columbia) applies is advised that the purchaser is required to file with the British Columbia Securities Commission a report within ten days of the sale of any preferred stock acquired by the purchaser pursuant to this offering. The report must be in the form attached to British Columbia Securities Commission Blanket Order BOR #95/17, a copy of which may be obtained from us. Only one report must be filed for preferred stock acquired on the same date and under the same prospectus exemption. TAXATION AND ELIGIBILITY FOR INVESTMENT Canadian purchasers of preferred stock should consult their own legal and tax advisors with respect to the tax consequences of an investment in the preferred stock in their particular circumstances and about the eligibility of the preferred stock for investment by the purchaser under relevant Canadian legislation. 26

SELLING SECURITYHOLDERS The preferred stock, and any shares of our common stock issued upon conversion of the preferred stock, are being offered by the selling securityholders listed in the table below. We issued and sold the preferred stock in a private placement to the Initial Purchasers, Credit Suisse First Boston Corporation, Bear Stearns, & Co. Inc., Lehman Brothers Inc. and Salomon Smith Barney Inc. The selling securityholders purchased their preferred stock from the Initial Purchasers or from subsequent holders in transactions exempt from registration under the Securities Act. Selling securityholders selling common stock, issued upon conversion of the preferred stock, acquired such stock from the Initial Purchasers or from subsequent holders in transactions exempt from registration under the Securities Act, or from the Company, through conversion of their previously acquired preferred stock. This prospectus covers sales, by the named selling securityholders, of preferred stock and shares of common stock issued upon conversion of the preferred stock. This prospectus will not cover subsequent sales of common stock received upon conversion of preferred stock purchased from a selling securityholder named in this prospectus. No offer or sale under this prospectus may be made by a securityholder unless that holder is listed in the table below, in a supplement to this prospectus or in an amendment to the related registration statement that has become effective. We will supplement or amend this prospectus to include additional selling security holders upon request and upon provision of all required information to us, subject to the terms of the Registration Rights Agreement dated as of November 6, 2001 between Chesapeake Energy Corporation and the Initial Purchasers. The following table sets forth, the name of each selling securityholder, the nature of any position, office, or other material relationship which the selling securityholder has had, within the past three years, with us or with any of our predecessors or affiliates, the amount of Preferred Stock and shares of our common stock beneficially owned by such securityholder prior to the offering, the amount being offered for the securityholder's account and the amount to be owned by such security holder after completion of the offering. We prepared the table based on information supplied to us by the selling securityholders. We have not sought to verify such information. Additionally, some or all of the selling securityholders may have sold or transferred some or all of their Preferred Stock, in transactions exempt from the registration requirements of the Securities Act, or some or all of their shares of our common stock, in exempt or non-exempt transactions, since the date on which the information in the table was provided to us. Other information about the selling securityholders may also change over time.

NUMBER OF SHARES NUMBER OF SHARES NUMBER OF SHARES NUMBER OF SHARES OF PREFERRED STOCK OF COMMON STOCK OF PREFERRED STOCK OF PREFERRED STOCK TO BE OWNED AFTER BENEFICIALLY OWNED BENEFICIALLY OWNED BEING OFFERED COMPLETION OF THE PRIOR TO THE NAME PRIOR TO THE OFFERING HEREBY OFFERING OFFERING(1) - ---- --------------------- ------------------ ------------------ ------------------ AIG Soundshore Holdings Ltd. ..................... 139,500 139,500 0 905,843 AIG Soundshore Opportunity Holding Fund Ltd. ........ 76,400 76,400 0 496,103 AIG Soundshore Strategic Holding Fund Ltd. ........ 46,100 46,100 0 299,350 Alpine Associates.......... 100,000 100,000 0 649,350 Alpine Partners, L.P. ..... 15,000 15,000 0 97,403 Bear, Stearns & Co. Inc. ..................... 5,000 5,000 0 32,468 BGI Global Investors c/o Forest Investment Mngt. L.L.C. ................... 5,000 5,000 0 32,468 Banc of America Securities LLC....................... 180,000 180,000 0 1,168,830 CSFB Convertible and Quantitative Strategies... 50,000 50,000 0 324,675 First Union National Bank...................... 295,000 295,000 0 1,915,583 NUMBER OF SHARES NUMBER OF SHARES OF COMMON STOCK OF COMMON STOCK TO BE OWNED AFTER BEING OFFERED COMPLETION OF THE NAME HEREBY OFFERING - ---- ---------------- ----------------- AIG Soundshore Holdings Ltd. ..................... 905,843 0 AIG Soundshore Opportunity Holding Fund Ltd. ........ 496,103 0 AIG Soundshore Strategic Holding Fund Ltd. ........ 299,350 0 Alpine Associates.......... 649,350 0 Alpine Partners, L.P. ..... 97,403 0 Bear, Stearns & Co. Inc. ..................... 32,468 0 BGI Global Investors c/o Forest Investment Mngt. L.L.C. ................... 32,468 0 Banc of America Securities LLC....................... 1,168,830 0 CSFB Convertible and Quantitative Strategies... 324,675 0 First Union National Bank...................... 1,915,583 0
27

NUMBER OF SHARES NUMBER OF SHARES NUMBER OF SHARES NUMBER OF SHARES OF PREFERRED STOCK OF COMMON STOCK OF PREFERRED STOCK OF PREFERRED STOCK TO BE OWNED AFTER BENEFICIALLY OWNED BENEFICIALLY OWNED BEING OFFERED COMPLETION OF THE PRIOR TO THE NAME PRIOR TO THE OFFERING HEREBY OFFERING OFFERING(1) - ---- --------------------- ------------------ ------------------ ------------------ FIST -- Franklin Convertible Securities Fund...................... 40,000 40,000 0 259,740 Forest Alternative Strategies II............. 1,500 1,500 0 9,740 Forest Fulcrum Fund L.L.P. ................... 16,000 16,000 0 103,896 Forest Global Convertible Fund Series A-5........... 60,500 60,500 0 392,857 FTIF -- Franklin Income Fund...................... 1,000 1,000 0 6,494 Franklin Custodian Fund -- Income Fund............... 270,800 270,800 0 1,758,440 FTVIPT -- Franklin Income Securities Fund........... 18,000 18,000 0 116,883 Global Bermuda Limited Partnership............... 4,000 4,000 0 25,974 Lakeshore International Ltd....................... 16,000 16,000 0 103,896 Lipper Convertibles, L.P. ..................... 150,000 150,000 0 974,025 LLT Limited................ 5,000 5,000 0 32,468 Lyxor Master Fund.......... 2,000 2,000 0 12,987 Navigator Offshore Fund, Ltd. ..................... 15,000 15,000 0 97,403 Navigator Partners L.P. ... 3,000 3,000 0 19,481 The Northwestern Mutual Life Insurance Company.... 30,000 30,000 0 194,805 Peoples Benefit Life Insurance Company/ TEAMSTERS........ 17,500 17,500 0 113,636 Ramius Capital Group....... 10,000 10,000 0 64,935 RBC Capital Services Inc. c/o Forest Investment Mngt. LLC................. 1,000 1,000 0 6,494 RCG Halifax Master Fund Ltd. ..................... 5,000 5,000 0 32,468 RCG Latitude Master Fund Ltd. ..................... 15,000 15,000 0 97,403 RCG Multi Strategy LP...... 10,000 10,000 0 64,935 Retail Clerks Pension Trust #2........................ 17,500 17,500 0 113,636 UBS O'Connor LLC F/B/O UBS Global Equity Arbitrage Master Ltd. .............. 70,000 70,000 0 454,545 White River Securities L.L.C. ................... 5,000 5,000 0 32,468 Yield Strategies Fund I, LP........................ 7,500 7,500 0 48,701 Yield Strategies Fund II, LP........................ 7,500 7,500 0 48,701 Zurich Master Hedge Fund c/o Forest Investment Mngt. L.L.C. ............. 5,000 5,000 0 32,468 --------- Total...................... 1,715,800 ========= NUMBER OF SHARES NUMBER OF SHARES OF COMMON STOCK OF COMMON STOCK TO BE OWNED AFTER BEING OFFERED COMPLETION OF THE NAME HEREBY OFFERING - ---- ---------------- ----------------- FIST -- Franklin Convertible Securities Fund...................... 259,740 0 Forest Alternative Strategies II............. 9,740 0 Forest Fulcrum Fund L.L.P. ................... 103,896 0 Forest Global Convertible Fund Series A-5........... 392,857 0 FTIF -- Franklin Income Fund...................... 6,494 0 Franklin Custodian Fund -- Income Fund............... 1,758,440 0 FTVIPT -- Franklin Income Securities Fund........... 116,883 0 Global Bermuda Limited Partnership............... 25,974 0 Lakeshore International Ltd....................... 103,896 0 Lipper Convertibles, L.P. ..................... 974,025 0 LLT Limited................ 32,468 0 Lyxor Master Fund.......... 12,987 0 Navigator Offshore Fund, Ltd. ..................... 97,403 0 Navigator Partners L.P. ... 19,481 0 The Northwestern Mutual Life Insurance Company.... 194,805 0 Peoples Benefit Life Insurance Company/ TEAMSTERS........ 113,636 0 Ramius Capital Group....... 64,935 0 RBC Capital Services Inc. c/o Forest Investment Mngt. LLC................. 6,494 0 RCG Halifax Master Fund Ltd. ..................... 32,468 0 RCG Latitude Master Fund Ltd. ..................... 97,403 0 RCG Multi Strategy LP...... 64,935 0 Retail Clerks Pension Trust #2........................ 113,636 0 UBS O'Connor LLC F/B/O UBS Global Equity Arbitrage Master Ltd. .............. 454,545 0 White River Securities L.L.C. ................... 32,468 0 Yield Strategies Fund I, LP........................ 48,701 0 Yield Strategies Fund II, LP........................ 48,701 0 Zurich Master Hedge Fund c/o Forest Investment Mngt. L.L.C. ............. 32,468 0 Total......................
- --------------- (1) The stated amounts, to the extent they describe common stock issuable upon conversion of the holder's preferred stock, assume conversion of all of the holders' preferred stock at a conversion ratio of 6.4935 shares of our common stock per share of preferred stock. This conversion ratio, however, will be subject to adjustment as described under "Description of the Preferred Stock -- Conversion Rights". As a result, the number of shares of our common stock issuable upon conversion of the preferred stock and, therefore, attributable to holders of preferred stock, may increase or decrease in the future. PLAN OF DISTRIBUTION The preferred stock and the common stock are being registered to permit public secondary trading of these securities by the holders thereof from time to time after the date of this prospectus. We have agreed, among other things, to bear all expenses (other than underwriting discounts and selling commissions) in connection with the registration and sale of the preferred stock and the common stock covered by this prospectus. 28

We will not receive any of the proceeds from the offering of preferred stock or the common stock by the selling securityholders. We have been advised by the selling securityholders that the selling securityholders may sell all or a portion of the preferred stock and common stock beneficially owned by them and offered hereby from time to time on any exchange on which the securities are listed on terms to be determined at the times of such sales. The selling securityholders may also make private sales directly or through a broker or brokers. Alternatively, any of the selling securityholders may from time to time offer the preferred stock or the common stock beneficially owned by them through underwriters, dealers or agents, who may receive compensation in the form of underwriting discounts, commissions or concessions from the selling securityholders and the purchasers of the preferred stock and the common stock for whom they may act as agent. The aggregate proceeds to the selling securityholders from the sale of the preferred stock or common stock offering by them hereby will be the purchase price of such preferred stock or common stock less discounts and commissions, if any. The preferred stock and common stock may be sold from time to time in one or more transactions at fixed offering prices, which may be changed, or at varying prices determined at the time of sale or at negotiated prices. These prices will be determined by the holders of such securities or by agreement between these holders and underwriters or dealers who may receive fees or commissions in connection therewith. These transactions may include block transactions or crosses. Crosses are transactions in which the same broker acts as an agent on both sides of the trade. In connection with sales of the preferred stock or our common stock or otherwise, the selling securityholder may enter into hedging transactions with broker-dealers or others, which may in turn engage in short sales of the preferred stock or our common stock in the course of hedging the positions they assume. The selling securityholder may also sell preferred stock or our common stock short and deliver preferred stock or our common stock to close out short positions, or loan or pledge preferred stock or our common stock to broker-dealers or others that in turn may sell such securities. The selling securityholder may pledge or grant a security interest in some or all of the preferred stock or our common stock issued upon conversion of the preferred stock owned by it and if it defaults in the performance of its secured obligations, the pledgees or secured parties may offer and sell the preferred stock or our common stock from time to time pursuant to this prospectus. The selling securityholder also may transfer and donate preferred stock or shares of our common stock issuable upon conversion of the preferred stock in other circumstances in which case the transferees, donees, pledgees or other successors in interest will be the selling securityholder for purposes of the prospectus. The selling securityholder may sell short our common stock and may deliver this prospectus in connection with such short sales and use the shares of our common stock covered by the prospectus to cover such short sales. In addition, any preferred stock or shares of our common stock covered by this prospectus that qualify for sale pursuant to Rule 144, Rule 144A or any other available exemption from registration under the Securities Act may be sold under Rule 144, Rule 144A or such other available exemption. At the time a particular offering of preferred stock or shares of our common stock issuable upon conversion of the preferred stock is made, a prospectus supplement, if required, will be distributed which will set forth the aggregate amount of preferred stock or number of shares of our common stock being offered and the terms of the offering, including the name or names of any underwriters, dealers, brokers or agents, if any, and any discounts, commissions or concessions allowed or reallowed to be paid to brokers or dealers. Our outstanding common stock is listed for trading on the New York Stock Exchange. The preferred stock was issued and sold on November 13, 2001 in transactions exempt from the registration requirements of the Securities Act to persons reasonably believed by the Initial Purchasers to be "qualified institutional buyers" (as defined in Rule 144A under the Securities Act). We have agreed to indemnify the Initial Purchasers and each selling securityholder, and each selling securityholder had agreed to indemnify us, the Initial Purchasers and each other selling shareholder against certain liabilities arising under the Securities Act. Selling securityholders and any underwriters, dealers, brokers or agents who participate in the distribution of the preferred stock or our common stock may be deemed to be "underwriters" within the meaning of the 29

Securities Act and any profits on the sale of the preferred stock and our common stock by them and any discounts, commissioners or concessions received by any such underwriters, dealers, brokers or agents may be deemed to be underwriting discounts and commissions under the Securities Act. The selling securityholders and any other person participating in such distribution will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including, without limitation, Regulation M which may limit the timing of purchases and sales of the preferred stock and our common stock by the selling securityholders and any other such person. Furthermore, Regulation M under the Exchange Act may restrict the ability of any person engaged in a distribution of the preferred stock and our common stock being distributed for a period of up to five business days prior to the commencement of such distribution. All of the foregoing may affect the marketability of the preferred stock and our common stock and the ability of any person or entity to engage in market-making activities with respect to the preferred stock and our common stock. We will use our reasonable efforts to keep the registration statement of which this prospectus is a part effective until the earliest of (a) the sale pursuant to the shelf registration statement of all the preferred stock and the shares of common stock issuable upon conversion of the preferred stock thereunder, (b) the expiration of the holding period applicable to such securities held by persons that are not our affiliates under Rule 144(k) under the Securities Act or any successor provision, subject to certain permitted exceptions, and (c) the date all preferred stock and common stock issuable upon conversion of the preferred stock cease to be outstanding. LEGAL MATTERS The validity of the issuance of the preferred stock and the validity of the common stock issuable upon conversion of the preferred stock have been passed upon for us by Vinson & Elkins L.L.P. In giving such opinion, Vinson & Elkins L.L.P. has relied upon Commercial Law Group, P.C. as to all matters of Oklahoma law. Shannon T. Self, a shareholder in Commercial Law Group, P.C., is a director of Chesapeake, and he beneficially owns 30,576 shares of our common stock. EXPERTS The consolidated financial statements of Chesapeake Energy Corporation and Gothic Energy Corporation, incorporated in this prospectus by reference to Chesapeake's annual report on Form 10-K/A for the year ended December 31, 2000, have been so incorporated in reliance on the reports of PricewaterhouseCoopers LLP, independent accountants, given on the authority of said firm as experts in auditing and accounting. Estimates of the oil and gas reserves of Chesapeake Energy Corporation and Gothic Energy Corporation and related future net cash flows and the present values thereof, included in Chesapeake's annual report on Form 10-K for the year ended December 31, 2000, were based upon reserve reports prepared by Williamson Petroleum Consultants, Inc., Ryder Scott Company, L.P. and Lee Keeling and Associates, Inc., independent petroleum engineers. We have incorporated these estimates in reliance on the authority of each such firm as experts in such matters. WHERE YOU CAN FIND MORE INFORMATION We file annual, quarterly and current reports, proxy statements and other information with the SEC. You may inspect and copy such material at the public reference facilities maintained by the SEC at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for more information on the public reference room. You can also find our SEC filings at the SEC's website at www.sec.gov and on our website at www.chkenergy.com. Information contained on our website is not part of this prospectus. 30

In addition, reports, proxy statements and other information concerning us can be inspected at the NYSE, 20 Broad Street, New York, New York 10005, where our common stock is listed. The following documents we filed with the SEC pursuant to the Exchange Act are incorporated herein by reference: 1. Annual Report on Form 10-K, as amended, for the fiscal year ended December 31, 2000; 2. Definitive Proxy Statement dated April 30, 2001 for our 2001 Annual Meeting of Stockholders; 3. Current Reports on Form 8-K filed on January 17, January 24, January 31, February 6, February 13, February 21, March 27, March 29, April 2, April 3, April 9, April 16, April 17, April 27, July 17, July 27, August 13, October 3, October 24 (as amended on October 26), October 25, October 29, November 1, November 2, November 7, and December 5, 2001 (excluding any information filed pursuant to Item 9 on any such Current Report on Form 8-K); and 4. Quarterly Reports on Form 10-Q for the quarters ended March 31, 2001, June 30, 2001 and September 30, 2001. All documents filed by us pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this prospectus and prior to the termination of this offering shall be deemed to be incorporated in this prospectus and to be a part hereof from the date of the filing of such document. Any statement contained in a document incorporated by reference herein shall be deemed to be modified or superseded for all purposes to the extent that a statement contained in this prospectus, or in any other subsequently filed document which is also incorporated or deemed to be incorporated by reference, modifies or supersedes such statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus. We will provide without charge to each person to whom this prospectus is delivered, upon written or oral request of such person, a copy of any or all documents incorporated by reference in this prospectus. Requests for such copies should be directed to Jennifer M. Grigsby, Secretary, Chesapeake Energy Corporation, 6100 North Western Avenue, Oklahoma City, Oklahoma 73118, by mail, or if by telephone at (405) 848-8000. FORWARD-LOOKING STATEMENTS This prospectus includes "forward-looking statements" within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. Forward-looking statements give our current expectations or forecasts of future events. They include statements regarding oil and gas reserve estimates, planned capital expenditures, the drilling of oil and gas wells and future acquisitions, expected oil and gas production, cash flow and anticipated liquidity, business strategy and other plans and objectives for future operations and expected future expenses and use of net operating loss carryforwards. Although we believe the expectations and forecasts reflected in these and other forward-looking statements are reasonable, we can give no assurance they will prove to have been correct. They can be affected by inaccurate assumptions or by known or unknown risks and uncertainties. Factors that could cause actual results to differ materially from expected results are described under "Risk Factors" and include: - the volatility of oil and gas prices; - our substantial indebtedness; - our commodity price risk management activities; - our ability to replace reserves; - the availability of capital; - uncertainties inherent in estimating quantities of oil and gas reserves; 31

- projecting future rates of production and the timing of development expenditures; - uncertainties in evaluating oil and gas reserves of acquired properties and associated potential liabilities; - drilling and operating risks; - adverse effects of governmental and environmental regulation; - losses possible from pending or future litigation; - the strength and financial resources of our competitors; and - the loss of officers or key employees. We caution you not to place undue reliance on these forward-looking statements, which speak only as of the date of this prospectus, and we undertake no obligation to update this information. We urge you to carefully review and consider the disclosures made in this prospectus and our reports filed with the SEC and incorporated by reference herein that attempt to advise interested parties of the risks and factors that may affect our business. 32

APPENDIX A GLOSSARY The terms defined below are used throughout this prospectus. Bbl. One stock tank barrel, or 42 U.S. gallons liquid volume, used herein in reference to crude oil or other liquid hydrocarbons. Btu. British thermal unit, which is the heat required to raise the temperature of a one-pound mass of water from 58.5 to 59.5 degrees Fahrenheit. Dry Hole; Dry Well. A well found to be incapable of producing either oil or gas in sufficient quantities to justify completion as an oil or gas well. Formation. A succession of sedimentary beds that were deposited under the same general geologic conditions. Mcf. One thousand cubic feet of gas. MMbtu. One million Btus. Present Value or PV-10. When used with respect to oil and gas reserves, present value or PV-10 means the estimated future gross revenue to be generated from the production of proved reserves, net of estimated production and future development costs, using prices and costs in effect at the determination date, without giving effect to nonproperty related expenses such as general and administrative expenses, debt service and future income tax expense or to depreciation, depletion and amortization, discounted using an annual discount rate of 10%. Proved Reserves. The estimated quantities of crude oil, natural gas and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions. Tcfe. Trillion cubic feet of gas equivalent on the basis of 6 Mcf of gas per Bbl of oil. Working Interest. The operating interest which gives the owner the right to drill, produce and conduct operating activities on the property and a share of production. 33

PART II INFORMATION NOT REQUIRED IN PROSPECTUS ITEM 20. INDEMNIFICATION OF OFFICERS AND DIRECTORS Section 1031 of the Oklahoma General Corporation Act, under which Chesapeake is incorporated, authorizes the indemnification of directors and officers under certain circumstances. Article VIII of the Certificate of Incorporation of Chesapeake and Article VI of the Bylaws of Chesapeake also provide for indemnification of directors and officers under certain circumstances. These provisions, together with Chesapeake's indemnification obligations under individual indemnity agreements with its directors and officers, may be sufficiently broad to indemnify such persons for liabilities under the Securities Act of 1933 (the "Securities Act"), as amended. In addition, Chesapeake maintains insurance, which insures its directors and officers against certain liabilities. The Oklahoma General Corporation Act provides for indemnification of each of Chesapeake's officers and directors against (a) expenses, including attorneys' fees, judgments, fines and amounts paid in settlement actually and reasonably incurred by them in connection with any action, suit or proceeding brought by reason of such person being or having been a director, officer, employee or agent of Chesapeake, or of any other corporation, partnership, joint venture, trust or other enterprise at the request of Chesapeake, other than an action by or in the right of Chesapeake. To be entitled to indemnification, the individual must have acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interest of Chesapeake, and with respect to any criminal action, the person seeking indemnification had no reasonable cause to believe that the conduct was unlawful and (b) expenses, including attorneys' fees, actually and reasonably incurred in connection with the defense or settlement of any action or suit by or in the right of Chesapeake brought by reason of the person seeking indemnification being or having been a director, officer, employee or agent of Chesapeake, or any other corporation, partnership, joint venture, trust or other enterprise at the request of Chesapeake, provided the actions were in good faith and were reasonably believed to be in or not opposed to the best interest of Chesapeake, except that no indemnification shall be made in respect of any claim, issue or matter as to which the individual shall have been adjudged liable to Chesapeake, unless and only to the extent that the court in which such action was decided has determined that the person is fairly and reasonably entitled to indemnity for such expenses which the court deems proper. Article VIII of Chesapeake's Certificate of Incorporation provides for indemnification of Chesapeake's director and officers. The Oklahoma General Corporation Act also permits Chesapeake to purchase and maintain insurance on behalf of Chesapeake's directors and officers against any liability arising out of their status as such, whether or not Chesapeake would have the power to indemnify them against such liability. These provisions may be sufficiently broad to indemnify such persons for liabilities arising under the Securities Act. Chesapeake has entered into indemnity agreements with each of its directors and executive officers. Under each indemnity agreement, Chesapeake will pay on behalf of the indemnitee any amount which he is or becomes legally obligated to pay because of (a) any claim or claims from time to time threatened or made against him by any person because of any act or omission or neglect or breach of duty, including any actual or alleged error or misstatement or misleading statement, which he commits or suffers while acting in his capacity as a director and/or officer of Chesapeake or an affiliate or (b) being a party, or being threatened to be made a party, to any threatened, pending or contemplated action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he is or was an officer, director, employee or agent of Chesapeake or an affiliate or is or was serving at the request of Chesapeake as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise. The payments which Chesapeake would be obligated to make under an indemnification agreement could include damages, charges, judgments, fines, penalties, settlements and costs, cost of investigation and cost of defense of legal, equitable or criminal actions, claims or proceedings and appeals therefrom, and costs of attachment, supersedeas, bail, surety or other bonds. Chesapeake also provides liability insurance for each of its directors and executive officers. II-1

ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES (a) Exhibits. The following exhibits are filed herewith pursuant to the requirements of Item 601 of Regulation S-K:

EXHIBIT NUMBER DESCRIPTION - ------- ----------- 2.1 Senior Secured Discount Notes Purchase Agreement dated June 23, 2000 between Chesapeake Energy Marketing, Inc. and Appaloosa Investment Limited Partnership I, Palomino Fund Ltd. and Tersk L.L.C. Incorporated herein by reference to Exhibit 2.1 to Chesapeake's Form S-1 Registration Statement (No. 333-41014). 2.2 Senior Secured Discount Notes Purchase Agreement dated June 23, 2000 between Chesapeake Energy Marketing, Inc. and Oppenheimer Strategic Income Fund, Oppenheimer Champion Income Fund, Oppenheimer High Yield Fund, Oppenheimer Strategic Bond Fund/VA and Atlas Strategic Income Fund. Incorporated herein by reference to Exhibit 2.2 to Chesapeake's Form S-1 Registration Statement (No. 333-41014). 2.3 Senior Secured Discount Notes Purchase Agreement dated June 26, 2000 between Chesapeake Energy Marketing, Inc. and John Hancock High Yield Bond Fund and John Hancock Variable Annuity High Yield Bond Fund. Incorporated herein by reference to Exhibit 2.3 to Chesapeake's Form S-1 Registration Statement (No. 333-41014). 2.4 Agreement and Plan of Merger dated September 8, 2000 among Chesapeake Energy Corporation, Chesapeake Merger 2000 Corp. and Gothic Energy Corporation, as amended by Amendment No. 1 to Agreement and Plan of Merger dated October 31, 2000. Incorporated herein by reference to Annex A to proxy statement/prospectus included in Amendment No. 1 to Chesapeake's registration statement on Form S-4 (No. 333-47330). 3.1 Chesapeake's Certificate of Incorporation, as amended. Incorporated herein by reference to Exhibit 3.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2001. 3.1.1* Chesapeake's Certificate of Designation of 6.75% Cumulative Convertible Preferred Stock. 3.2 Chesapeake's Bylaws. Incorporated herein by reference to Exhibit 3.2 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2001. 4.1 Indenture dated as of March 15, 1997 among Chesapeake, as issuer, Chesapeake Operating, Inc., Chesapeake Gas Development Corporation and Chesapeake Exploration Limited Partnership, as Subsidiary Guarantors, and The Bank of New York (formerly United States Trust Company of New York), as Trustee, with respect to 7.875% Senior Notes due 2004. Incorporated herein by reference to Exhibit 4.1 to Chesapeake's registration statement on Form S-4 (No. 333-24995). First Supplemental Indenture dated December 17, 1997 and Second Supplemental Indenture dated February 16, 1998. Incorporated herein by reference to Exhibit 4.1.1 to Chesapeake's transition report on Form 10-K for the six months ended December 31, 1997. Second [Third] Supplemental Indenture dated April 22, 1998. Incorporated herein by reference to Exhibit 4.1.1 to Chesapeake's registration statement on Form S-3 registration statement (No. 333-57235). Fourth Supplemental Indenture dated July 1, 1998. Incorporated herein by reference to Exhibit 4.1.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 1998. Fifth Supplemental Indenture dated November 19, 1999. Incorporated herein by reference to Exhibit 4.1.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended March 31, 2001. Sixth Supplemental Indenture dated December 31, 1999. Incorporated herein by reference to Exhibit 4.1.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. Seventh Supplemental Indenture dated September 12, 2001. Incorporated herein by reference to Exhibit 4.1.2 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. Eighth Supplemental Indenture dated October 1, 2001. Incorporated herein by reference to Exhibit 4.1.3 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. 4.1.1* Ninth Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of March 15, 1997 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and Bank of New York, as Trustee, with respect to 7 7/8% Senior Notes due 2004.
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EXHIBIT NUMBER DESCRIPTION - ------- ----------- 4.2 Indenture dated as of March 15, 1997 among Chesapeake, as issuer, Chesapeake Operating, Inc., Chesapeake Gas Development Corporation and Chesapeake Exploration Limited Partnership, as Subsidiary Guarantors, and The Bank of New York (formerly United States Trust Company of New York), as Trustee, with respect to 8.5% Senior Notes due 2012. Incorporated herein by reference to Exhibit 4.3 to Chesapeake's registration statement on Form S-4 (No. 333-24995). First Supplemental Indenture dated December 17, 1997 and Second Supplemental Indenture dated February 16, 1998. Incorporated herein by reference to Exhibit 4.2.1 to Chesapeake's transition report on Form 10-K for the six months ended December 31, 1997. Second [Third] Supplemental Indenture dated April 22, 1998. Incorporated herein by reference to Exhibit 4.2.1 to Chesapeake's Amendment No. 1 to Form S-3 registration statement (No. 333-57235). Fourth Supplemental Indenture dated July 1, 1998. Incorporated herein by reference to Exhibit 4.2.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 1998. Fifth Supplemental Indenture dated November 19, 1999. Incorporated herein by reference to Exhibit 4.2.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended March 31, 2001. Sixth Supplemental Indenture dated December 31, 1999. Incorporated herein by reference to Exhibit 4.2.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. Seventh Supplemental Indenture dated September 12, 2001. Incorporated herein by reference to Exhibit 4.2.2 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. Eighth Supplemental Indenture dated October 1, 2001. Incorporated herein by reference to Exhibit 4.2.3 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. 4.2.1* Ninth Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of March 15, 1997 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and Bank of New York, as Trustee, with respect to 8 1/2% Senior Notes due 2012. 4.3 Indenture dated as of April 6, 2001 among Chesapeake, as issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and The Bank of New York (formerly United States Trust Company of New York), as Trustee, with respect to 8.125% Senior Notes due 2011. Incorporated herein by reference to Exhibit 4.6 to Chesapeake's quarterly report on Form 10-Q for the quarter ended March 31, 2001. Supplemental Indenture dated May 14, 2001. Incorporated herein by reference to Exhibit 4.6 to Chesapeake's quarterly report on Form 10-Q for the quarter ended March 31, 2001. Second Supplemental Indenture dated September 12, 2001. Incorporated herein by reference to Exhibit 4.3.1 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. Third Supplemental Indenture dated October 1, 2001. Incorporated herein by reference to Exhibit 4.3.2 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. 4.3.1* Fourth Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of April 6, 2001 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and Bank of New York, as Trustee, with respect to 8 1/8% Senior Notes due 2011. 4.5 Agreement to furnish copies of unfiled long-term debt instruments. Incorporated herein by reference to Chesapeake's transition report on Form 10-K for the six months ended December 31, 1997. 4.6 $225,000,000 Second Amended and Restated Credit Agreement, dated as of June 11, 2001, among Chesapeake Energy Corporation, Chesapeake Exploration Limited Partnership, as Borrower, Bear Stearns Corporate Lending Inc., as Syndication Agent, Union Bank of California, N.A., as Administrative Agent and Collateral Agent, BNP Paribas and Toronto Dominion (Texas), Inc., as Co-Documentation Agents and other lenders party thereto. Incorporated herein by reference to Exhibit 4.6 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2001. Consent and waiver letter dated September 10, 2001 and consent and waiver letter dated October 5, 2001 incorporated herein by reference to Exhibits 4.6.1 and 4.6.2 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001, respectively.
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EXHIBIT NUMBER DESCRIPTION - ------- ----------- 4.6.1 Consent and waiver letter dated November 2, 2001 with respect to Second Amended and Restated Credit Agreement, dated as of June 11, 2001, among Chesapeake Energy Corporation, Chesapeake Exploration Limited Partnership, as Borrower, Bear Stearns Corporate Lending Inc., as Syndication Agent, Union Bank of California, N.A., as Administrative Agent and Collateral Agent, and other lenders party thereto. Incorporated herein by reference to Exhibit 4.6.1 to Chesapeake's registration statement on Form S-4 (No. 333-74584). 4.9 Warrant Agreement dated as of September 9, 1997 between Gothic Energy Corporation and UMB Bank, N.A. (formerly American Stock Transfer & Trust Company), as warrant agent, and Supplement to Warrant Agreement dated as of January 16, 2001. Incorporated herein by reference to Exhibit 4.9 to Registrant's annual report on Form 10-K for the year ended December 31, 2000. 4.10 Registration Rights Agreement dated as of September 9, 1997 among Gothic Energy Corporation, two of its subsidiaries, Oppenheimer & Co., Inc., Banc One Capital Corporation and Paribas Corporation. Incorporated herein by reference to Exhibit 4.10 to Registrant's annual report on Form 10-K for the year ended December 31, 2000. 4.11 Warrant Agreement dated as of January 23, 1998 between Gothic Energy Corporation and UMB Bank, N.A. (formerly American Stock Transfer & Trust Company), as warrant agent. Incorporated herein by reference to Exhibit 4.11 to Registrant's annual report on Form 10-K for the year ended December 31, 2000. 4.12 Common Stock Registration Rights Agreement dated as of January 23, 1998 among Gothic Energy Corporation and purchasers of its senior redeemable preferred stock. Incorporated herein by reference to Exhibit 4.12 to Registrant's annual report on Form 10-K for the year ended December 31, 2000. 4.13 Substitute Warrant to Purchase Common Stock of Chesapeake Energy Corporation dated as of January 16, 2001 issued to Amoco Corporation. Incorporated herein by reference to Exhibit 4.13 to Registrant's annual report on Form 10-K for the year ended December 31, 2000. 4.14 Warrant Agreement dated as of April 21, 1998 between Gothic Energy Corporation and American Stock Transfer & Trust Company, as warrant agent, and Supplement to Warrant Agreement dated as of January 16, 2001. Incorporated herein by reference to Exhibit 4.14 to Registrant's annual report on Form 10-K for the year ended December 31, 2000. 4.15 Warrant Registration Rights Agreement dated as of April 21, 1998 among Gothic Energy Corporation and purchasers of units consisting of its 14 1/8% senior secured discount notes due 2006 and warrants to purchase its common stock. Incorporated herein by reference to Exhibit 4.15 to Registrant's annual report on Form 10-K for the year ended December 31, 2000. 4.16 Indenture dated as of November 5, 2001 among Chesapeake, as issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors and The Bank of New York, with respect to 8.375% Senior Notes due 2008. Incorporated herein by reference to Exhibit 4.16 to Chesapeake's registration statement on Form S-4 (No. 333-74584). 4.16.1* First Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of November 5, 2001 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and The Bank of New York, as Trustee, with respect to 8 3/8% Senior Notes due 2008. 4.17 Registration Rights Agreement dated October 25, 2001 among Chesapeake and certain of its Subsidiaries, as guarantors, and Bear, Stearns & Co. Inc., Lehman Brothers Inc., Salomon Smith Barney Inc. and Credit Suisse First Boston Corporation. Incorporated herein by reference to Exhibit 4.17 to Chesapeake's registration statement on Form S-4 (No. 333-74584). 5.1* Opinion of Commercial Law Group, P.C. regarding the validity of the securities being registered. 8.1* Opinion of Vinson & Elkins L.L.P. regarding certain tax matters. 10.1.1+ Chesapeake's 1992 Incentive Stock Option Plan. Incorporated herein by reference to Exhibit 10.1.1 to Chesapeake's registration statement on Form S-4 (No. 33-93718). 10.1.2+ Chesapeake's 1992 Nonstatutory Stock Option Plan, as Amended. Incorporated herein by reference to Exhibit 10.1.2 to Chesapeake's quarterly report on Form 10-Q for the quarter ended December 31, 1996.
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EXHIBIT NUMBER DESCRIPTION - ------- ----------- 10.1.3+ Chesapeake's 1994 Stock Option Plan, as amended. Incorporated herein by reference to Exhibit 10.1.3 to Chesapeake's quarterly report on Form 10-Q for the quarter ended December 31, 1996. 10.1.4+ Chesapeake's 1996 Stock Option Plan. Incorporated herein by reference to Chesapeake's Proxy Statement for its 1996 Annual Meeting of Shareholders and to Chesapeake's quarterly report on Form 10-Q for the quarter ended December 31, 1996. 10.1.5+ Chesapeake's 1999 Stock Option Plan. Incorporated herein by reference to Exhibit 10.1.5 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 1999. 10.1.6+ Chesapeake's 2000 Employee Stock Option Plan. Incorporated herein by reference to Exhibit 10.1.6 to Chesapeake's quarterly report on Form 10-Q for the quarter ended March 31, 2000. 10.1.7+ Chesapeake's 2000 Executive Officer Stock Option Plan. Incorporated herein by reference to Exhibit 10.1.7 to Chesapeake's quarterly report on Form 10-Q for the quarter ended March 31, 2000. 10.1.8+ Registrant's 2001 Stock Option Plan. Incorporated herein by reference to Exhibit B to Registrant's definitive proxy statement for its 2001 annual meeting of shareholders filed April 30, 2001. 10.1.9+ Registrant's 2001 Executive Officer Stock Option Plan. Incorporated herein by reference to Exhibit 10.1.9 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2001. 10.1.10+ Registrant's 2001 Nonqualified Stock Option Plan. Incorporated herein by reference to Exhibit 10.1.10 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2001. 10.2.1+ Second Amended and Restated Employment Agreement dated as of July 1, 2001, between Aubrey K. McClendon and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 4.7 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. 10.2.2+ Second Amended and Restated Employment Agreement dated as of July 1, 2001, between Tom L. Ward and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 4.8 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 2001. 10.2.3+ Amended and Restated Employment Agreement dated as of August 1, 2000 between Marcus C. Rowland and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 10.2.3 to Chesapeake's registration statement on Form S-1 (No. 333-45872). 10.2.5+ Employment Agreement dated as of July 1, 2000, between Steven C. Dixon and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 10.2.5 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2000. 10.2.6+ Employment Agreement dated as of July 1, 2000, between J. Mark Lester and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 10.2.6 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2000. 10.2.7+ Employment Agreement dated as of July 1, 2000, between Henry J. Hood and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 10.2.7 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2000. 10.2.8+ Employment Agreement dated as of July 1, 2000, between Michael A. Johnson and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 10.2.8 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2000. 10.2.9+ Employment Agreement dated as of July 1, 2000, between Martha A. Burger and Chesapeake Energy Corporation. Incorporated herein by reference to Exhibit 10.2.9 to Chesapeake's quarterly report on Form 10-Q for the quarter ended June 30, 2000. 10.3+ Form of Indemnity Agreement for officers and directors of Chesapeake and its subsidiaries. Incorporated herein by reference to Exhibit 10.30 to Chesapeake's registration statement on Form S-1 (No. 33-55600). 10.4.1 Amended and Restated Consulting Agreement dated January 11, 2001 between Chesapeake Energy Corporation and Michael Paulk. Incorporated herein by reference to Exhibit 10.4.1 to Chesapeake's annual report on Form 10-K for the year ended December 31, 2000.
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EXHIBIT NUMBER DESCRIPTION - ------- ----------- 10.4.2 Amended and Restated Consulting Agreement dated January 11, 2001 between Chesapeake Energy Corporation and Steven P. Ensz. Incorporated herein by reference to Exhibit 10.4.2 to Chesapeake's annual report on Form 10-K for the year ended December 31, 2000. 10.5 Rights Agreement dated July 15, 1998 between Chesapeake and UMB Bank, N.A., as Rights Agent. Incorporated herein by reference to Exhibit 1 to Chesapeake's registration statement on Form 8-A filed July 16, 1998. Amendment No. 1 dated September 11, 1998. Incorporated herein by reference to Exhibit 10.3 to Chesapeake's quarterly report on Form 10-Q for the quarter ended September 30, 1998. 10.10 Partnership Agreement of Chesapeake Exploration Limited Partnership dated December 27, 1994 between Chesapeake Energy Corporation and Chesapeake Operating, Inc. Incorporated herein by reference to Exhibit 10.10 to Chesapeake's registration statement on Form S-4 (No. 33-93718). 10.11 Amended and Restated Limited Partnership Agreement of Chesapeake Louisiana, L.P. dated June 30, 1997 between Chesapeake Operating, Inc. and Chesapeake Energy Louisiana Corporation. Incorporated herein by reference to Exhibit 10.11 to Chesapeake's annual report on Form 10-K for the year ended June 30, 1997. 12* Computation of Ratios of Earnings to Fixed Charges and Preferred Dividends. 21 Subsidiaries of Chesapeake. Incorporated herein by reference to Exhibit 21 to Chesapeake's registration statement on Form S-4 (No. 333-74584). 23.1* Consent of PricewaterhouseCoopers LLP as to Chesapeake. 23.2* Consent of PricewaterhouseCoopers LLP as to Gothic Energy Corporation. 23.3* Consent of Williamson Petroleum Consultants, Inc. 23.4* Consent of Ryder Scott Company L.P. 23.5* Consent of Lee Keeling and Associates, Inc. as to Chesapeake Energy Corporation and Gothic Energy Corporation. 23.6* Consent of Vinson & Elkins L.L.P. (included in Exhibit 8.1). 23.7* Consent of Commercial Law Group, P.C. (included in Exhibit 5.1). 24.1* Power of Attorney (included in the signature page of this Registration Statement).
- --------------- * Filed herewith. + Management contract or compensatory plan or arrangement. (b) Financial Statement Schedules. Incorporated herein by reference to Item 8 of Chesapeake's annual report on Form 10-K for the year ended December 31, 2000, as amended. ITEM 22. UNDERTAKINGS Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant, we have been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue. II-6

The registrant hereby undertakes (1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement: (a) To include any prospectus required by section 10(a)(3) of the Securities Act of 1933; (b) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement; (c) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement; and (2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering. (4) That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrants annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (5) To respond to requests for information that is incorporated by reference into the prospectus pursuant to Items 4, 10(b), 11, or 13 of this Form, within one business day of receipt of such request, and to send the incorporated documents by first class mail or other equally prompt means. This includes information contained in documents filed subsequent to the effective date of the registration statement through the date of responding to the request. (6) To supply by means of a post-effective amendment all information concerning a transaction, and the company being acquired involved therein, that was not the subject of and included in this Registration Statement when it became effective. II-7

SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Oklahoma City, State of Oklahoma on January 9, 2002. CHESAPEAKE ENERGY CORPORATION By: /s/ AUBREY K. MCCLENDON ------------------------------------ Aubrey K. McClendon Chairman of the Board and Chief Executive Officer Each person whose signature appears below authorizes Aubrey K. McClendon and Marcus C. Rowland, and each of them, each of whom may act without joinder of the other, to execute in the name of each such person who is then an officer or director of the company and to file any amendments to this registration statement necessary or advisable to enable the company to comply with the Securities Act of 1933, as amended, and any rules, regulations and requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration of the securities which are the subject of this registration statement, which amendments may make such changes in the registration statement as such attorney may deem appropriate. Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the date indicated.

SIGNATURE CAPACITY DATE --------- -------- ---- /s/ AUBREY K. MCCLENDON Chairman of the Board, Chief January 9, 2002 ------------------------------------------------ Executive Officer and Director Aubrey K. McClendon (Principal Executive Officer) /s/ TOM L. WARD President, Chief Operating January 9, 2002 ------------------------------------------------ Officer and Director Tom L. Ward (Principal Executive Officer) /s/ MARCUS C. ROWLAND Executive Vice President and January 9, 2002 ------------------------------------------------ Chief Financial Officer Marcus C. Rowland (Principal Financial Officer) /s/ MICHAEL A. JOHNSON Senior Vice President -- January 9, 2002 ------------------------------------------------ Accounting (Principal Michael A. Johnson Accounting Officer) /s/ EDGAR F. HEIZER, JR. Director January 9, 2002 ------------------------------------------------ Edgar F. Heizer, Jr. /s/ BREENE M. KERR Director January 9, 2002 ------------------------------------------------ Breene M. Kerr /s/ SHANNON T. SELF Director January 9, 2002 ------------------------------------------------ Shannon T. Self /s/ FREDERICK B. WHITTEMORE Director January 9, 2002 ------------------------------------------------ Frederick B. Whittemore
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EXHIBIT INDEX

EXHIBIT NUMBER DESCRIPTION - ------- ----------- 3.1.1 Chesapeake's Certificate of Designation of 6.75% Cumulative Convertible Preferred Stock. 4.1.1 Ninth Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of March 15, 1997 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and Bank of New York, as Trustee, with respect to 7 7/8% Senior Notes due 2004. 4.2.1 Ninth Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of March 15, 1997 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and Bank of New York, as Trustee, with respect to 8 1/2% Senior Notes due 2012. 4.3.1 Fourth Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of April 6, 2001 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and Bank of New York, as Trustee, with respect to 8 1/8% Senior Notes due 2011. 4.16.1 First Supplemental Indenture, dated as of December 17, 2001, to Indenture dated as of November 5, 2001 among Chesapeake Energy Corporation, as Issuer, its subsidiaries signatory thereto, as Subsidiary Guarantors, and The Bank of New York, as Trustee, with respect to 8 3/8% Senior Notes due 2008. 5.1 Opinion of Commercial Law Group, P.C. regarding the validity of the securities being registered. 8.1 Opinion of Vinson & Elkins L.L.P. regarding certain tax matters. 12 Computation of Ratios of Earnings to Fixed Charges and Preferred Dividends. 23.1 Consent of PricewaterhouseCoopers LLP as to Chesapeake. 23.2 Consent of PricewaterhouseCoopers LLP as to Gothic Energy Corporation. 23.3 Consent of Williamson Petroleum Consultants, Inc. 23.4 Consent of Ryder Scott Company L.P. 23.5 Consent of Lee Keeling and Associates, Inc. as to Chesapeake Energy Corporation and Gothic Energy Corporation. 23.6 Consent of Vinson & Elkins L.L.P. (included in Exhibit 8.1). 23.7 Consent of Commercial Law Group, P.C. (included in Exhibit 5.1). 24.1 Power of Attorney (included in the signature page of this Registration Statement).

EXHIBIT 3.1.1 EXECUTION COPY CERTIFICATE OF DESIGNATION OF 6.75% CUMULATIVE CONVERTIBLE PREFERRED STOCK OF CHESAPEAKE ENERGY CORPORATION Pursuant to Section 1032(G) of the Oklahoma General Corporation Act CHESAPEAKE ENERGY CORPORATION, an Oklahoma corporation (the "Company"), does hereby certify that the following resolution was duly adopted by action of the Board of Directors of the Company, with the provisions thereof fixing the number of shares of the series and the dividend rate being set by action of the Board of Directors of the Company: RESOLVED that pursuant to the authority expressly granted to and vested in the Board of Directors of the Company by the provisions of Article IV, Section 1 of the Certificate of Incorporation of the Company, as amended from time to time (the "Certificate of Incorporation"), and pursuant to Section 1032(G) of the Oklahoma General Corporation Act, the Board of Directors hereby creates a series of preferred stock of the Company and hereby states that the voting powers, designations, preferences and relative, participating, optional or other special rights of which, and qualifications, limitations or restrictions thereof (in addition to the provisions set forth in the Certificate of Incorporation which are applicable to the preferred stock of all classes and series), shall be as follows: 1. Designation and Amount; Ranking. (a) There shall be created from the 10,000,000 shares of preferred stock, par value $0.01 per share, of the Company authorized to be issued pursuant to the Certificate of Incorporation, a series of preferred stock, designated as the "6.75% Cumulative Convertible Preferred Stock," par value $0.01 per share (the "Preferred Stock"), and the number of shares of such series shall be 3,000,000. Such number of shares may be decreased by resolution of the Board of Directors; provided that no decrease shall reduce the number of shares of Preferred Stock to a number less than that of the shares of Preferred Stock then outstanding plus the number of

2 shares issuable upon exercise of options or rights then outstanding. (b) The Preferred Stock will, with respect to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company rank (i) senior to all Junior Stock, (ii) on a parity with all Parity Stock and (iii) junior to all Senior Stock. 2. Definitions. As used herein, the following terms shall have the following meanings: (a) "Accrued Dividends" shall mean, with respect to any share of Preferred Stock, as of any date, the accrued and unpaid dividends on such share from and including the most recent Dividend Payment Date (or the Issue Date, if such date is prior to the first Dividend Payment Date) to but not including such date. (b) "Accumulated Dividends" shall mean, with respect to any share of Preferred Stock, as of any date, the aggregate accumulated and unpaid dividends on such share from the Issue Date until the most recent Dividend Payment Date on or prior to such date. There shall be no Accumulated Dividends with respect to any share of Preferred Stock prior to the first Dividend Payment Date. (c) "Affiliate" shall have the meaning ascribed to it, on the date hereof, under Rule 405 of the Securities Act of 1933, as amended. (d) "Board of Directors" shall mean the Board of Directors of the Company or, with respect to any action to be taken by the Board of Directors, any committee of the Board of Directors duly authorized to take such action. (e) "Business Day" shall mean any day other than a Saturday, Sunday or other day on which commercial banks in The City of New York are authorized or required by law or executive order to close. (f) "Change of Control" shall mean any of the following events: (i) the sale, lease or transfer, in one or a series of related transactions, of all or substantially all of the Company's assets (determined on a consolidated basis) to any Person or group (as such term is used in Section 13(d)(3) of the Exchange Act), other than to Permitted Holders; (ii) the adoption of a plan the

3 consummation of which would result in the liquidation or dissolution of the Company; (iii) the acquisition, directly or indirectly, by any Person or group (as such term is used in Section 13(d)(3) of the Exchange Act), other than Permitted Holders, of beneficial ownership (as defined in Rule 13d-3 under the Exchange Act) of more than 50% of the aggregate voting power of the Voting Stock of the Company; provided, however, that the Permitted Holders beneficially own (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, in the aggregate a lesser percentage of the total voting power of the Voting Stock of the Company than such other Person or group and do not have the right or ability by voting power, contract or otherwise to elect or designate for election a majority of the Board of Directors (for the purposes of this definition, such other Person or group shall be deemed to beneficially own any Voting Stock of a specified corporation held by a parent corporation, if such other Person or group is the beneficial owner (as defined above), directly or indirectly, of more than 35% of the voting power of the Voting Stock of such parent corporation and the Permitted Holders beneficially own (as defined in this proviso), directly or indirectly, in the aggregate a lesser percentage of the voting power of the Voting Stock of such parent corporation and do not have the right or ability by voting power, contract or otherwise to elect or designate for election a majority of the Board of Directors of such parent corporation); or (iv) during any period of two consecutive years, individuals who at the beginning of such period composed the Board of Directors of the Company (together with any new directors whose election by such Board of Directors or whose nomination for election by the shareholders of the Company was approved by a vote of 66 2/3% of the directors of the Company then still in office who were either directors at the beginning of such period or whose election or nomination for election was previously so approved) cease for any reason to constitute a majority of the Board of Directors of the Company then in office. For purposes of this definition of "Change of Control," the term "Permitted Holders" means Aubrey K. McClendon and Tom L. Ward and their respective Affiliates. (g) "Change of Control Date" shall mean the date on which the Change of Control event occurs. (h) "Conversion Price" shall mean $7.70, subject to adjustment as set forth in Section 7(c).

4 (i) "Common Stock" shall mean the common stock, par value $0.01 per share, of the Company, or any other class of stock resulting from successive changes or reclassifications of such common stock consisting solely of changes in par value, or from par value to no par value, or as a result of a subdivision, combination, or merger, consolidation or similar transaction in which the Company is a constituent corporation. (j) "DTC" or "Depository" means The Depository Trust Company. (k) "Dividend Payment Date" shall mean February 15, May 15, August 15 and November 15 of each year, commencing February 15, 2002. (l) "Dividend Record Date" shall mean February 1, May 1, August 1 and November 1 of each year. (m) "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. (n) "Holder" or "holder" shall mean a holder of record of the Preferred Stock. (o) "Issue Date" shall mean November 13, 2001, the original date of issuance of the Preferred Stock. (p) "Junior Stock" shall mean all classes of common stock of the Company and the Series A Junior Participating Convertible Preferred Stock and each other class of capital stock or series of preferred stock established after the Issue Date, by the Board of Directors, the terms of which do not expressly provide that such class or series ranks senior to or on parity with the Preferred Stock as to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company. (q) "Liquidation Preference" shall mean, with respect to each share of Preferred Stock, $50. (r) "Market Value" shall mean the average closing price of the Common Stock for a five consecutive trading day period on the NYSE (or such other national securities exchange or automated quotation system on which the Common Stock is then listed or authorized for quotation or, if the Common Stock is not so listed or authorized for quotation,

5 an amount determined in good faith by the Board of Directors to be the fair value of the Common Stock). (s) "NYSE" shall mean the New York Stock Exchange, Inc. (t) "Officer" means the Chairman of the Board of Directors, the President, any Vice President, the Treasurer, the Secretary or any Assistant Secretary of the Company. (u) "Officers' Certificate" means a certificate signed by two Officers. (v) "Opinion of Counsel" means a written opinion from legal counsel who is acceptable to the Transfer Agent. The counsel may be an employee of or counsel to the Company or the Transfer Agent. (w) "Parity Stock" shall mean any class of capital stock or series of preferred stock established after the Issue Date by the Board of Directors, the terms of which expressly provide that such class or series will rank on parity with the Preferred Stock as to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company. (x) "Person" shall mean any individual, corporation, general partnership, limited partnership, limited liability partnership, joint venture, association, joint-stock company, trust, limited liability company, unincorporated organization or government or any agency or political subdivision thereof. (y) "Purchase Agreement" shall mean that certain Purchase Agreement with respect to the Preferred Stock, dated as of November 6, 2001 among the Company, Credit Suisse First Boston Corporation, Bear, Stearns & Co. Inc., Lehman Brothers Inc. and Salomon Smith Barney Inc. (z) "Registration Rights Agreement" means the Registration Rights Agreement dated November 6, 2001 among the Company, Credit Suisse First Boston Corporation, Bear, Stearns & Co. Inc., Lehman Brothers Inc. and Salomon Smith Barney Inc. with respect to the Preferred Stock. (aa) "SEC" or "Commission" shall mean the Securities and Exchange Commission.

6 (bb) "Securities Act" means the Securities Act of 1933, as amended. (cc) "Senior Stock" shall mean each class of capital stock or series of preferred stock established after the Issue Date by the Board of Directors, the terms of which expressly provide that such class or series will rank senior to the Preferred Stock as to dividend rights or rights upon the liquidation, winding-up or dissolution of the Company. (dd) "Shelf Registration Statement" shall mean a shelf registration statement filed with the SEC to cover resales of Transfer Restricted Securities by holders thereof, as required by the Registration Rights Agreement. (ee) "Transfer Agent" shall mean UMB Bank, N.A., the Company's duly appointed transfer agent, registrar and conversion and dividend disbursing agent for the Preferred Stock. The Company may, in its sole discretion, remove the Transfer Agent with 10 days' prior notice to the Transfer Agent; provided, that the Company shall appoint a successor Transfer Agent who shall accept such appointment prior to the effectiveness or such removal. (ff) "Transfer Restricted Securities" shall mean each share of Preferred Stock (or the shares of Common Stock into which such share of Preferred Stock is convertible) until (i) the date on which such security or its predecessor has been effectively registered under the Securities Act and disposed of in accordance with the Shelf Registration Statement or (ii) the date on which such security or predecessor is distributed to the public pursuant to Rule 144 under the Securities Act or is saleable pursuant to Rule 144(k) under the Securities Act. (gg) "Voting Rights Triggering Event" shall mean the failure of the Company to pay dividends on the Preferred Stock with respect to six or more quarterly periods (whether or not consecutive). (hh) "Voting Stock" shall mean, with respect to any Person, securities of any class or classes of Capital Stock in such Person entitling the holders thereof (whether at all times or only so long as no senior class of stock has voting power by reason of contingency) to vote in the election of members of the Board of Directors or other governing body of such Person. For purposes of this definition, "Capital Stock" shall mean, with respect to any

7 Person, any and all shares, interests, participations or other equivalents (however designated) of corporate stock or partnership interests and any and all warrants, options and rights with respect thereto (whether or not currently exercisable), including each class of common stock and preferred stock of such Person. 3. Dividends. (a) The holders of shares of the outstanding Preferred Stock shall be entitled, when, as and if declared by the Board of Directors out of funds of the Company legally available therefor, to receive cumulative cash dividends at the rate per annum of 6.75% per share on the Liquidation Preference (equivalent to $3.375 per annum per share, payable quarterly in arrears (the "Dividend Rate"). The Dividend Rate may be increased in the circumstances described in Section 3(b) below. Dividends payable for each full dividend period will be computed by dividing the Dividend Rate by four and shall be payable in arrears on each Dividend Payment Date (commencing February 15, 2002) for the quarterly period ending immediately prior to such Dividend Payment Date, to the holders of record of Preferred Stock at the close of business on the Dividend Record Date applicable to such Dividend Payment Date. Such dividends shall be cumulative from the most recent date as to which dividends shall have been paid or, if no dividends have been paid, from the Issue Date (whether or not in any dividend period or periods there shall be funds of the Company legally available for the payment of such dividends) and shall accrue on a day-to-day basis, whether or not earned or declared, from and after the Issue Date. Dividends payable for any partial dividend period shall be computed on the basis of actual days elapsed over a 360-day year consisting of twelve 30-day months. Accumulations of dividends on shares of Preferred Stock shall not bear interest. (b) If (i) by January 12, 2002, the Shelf Registration Statement has not been filed with the Commission, (ii) by May 12, 2002, the Shelf Registration Statement has not been declared effective by the Commission or (iii) after the Shelf Registration Statement has been declared effective, (A) the Shelf Registration Statement thereafter ceases to be effective or (B) the Shelf Registration Statement or the related prospectus ceases to be usable (in each case, subject to the exceptions described below) in connection with resale of Transfer Restricted Securities during the period that any Transfer Restricted

8 Securities remain outstanding (each such event referred to in clauses (i), (ii) and (iii), a "Registration Default"), additional dividends shall accrue on the Preferred Stock at the rate of .50% per annum (resulting in a Dividend Rate of 7.25% per annum during the continuance of a Registration Default), from and including the date on which any such Registration Default shall occur to but excluding the date on which all Registration Defaults have been cured. At all other times, dividends shall accumulate on the Preferred Stock at the Dividend Rate as described in Section 3(a). A Registration Default referred to in clause (iii) of Section 3(b) shall be deemed not to have occurred and be continuing in relation to the Shelf Registration Statement or the related prospectus if (i) such Registration Default has occurred solely as a result of (x) the filing of a post-effective amendment to the Shelf Registration Statement to incorporate annual audited financial information with respect to the Company where such post-effective amendment is not yet effective and needs to be declared effective to permit Holders to use the related prospectus or (y) other material events, with respect to the Company that would need to be described in the Shelf Registration Statement or the related prospectus and (ii) in the case of clause (y), the Company is proceeding promptly and in good faith to amend or supplement such Shelf Registration Statement and related prospectus to describe such events; provided, however, that in any case if such Registration Default referred to in clause (iii) of Section 3(b) occurs for a continuous period in excess of 30 days, additional dividends as described in Section 3(b) shall be payable in accordance therewith from the day such Registration Default occurs until such Registration Default is cured. (c) No dividend will be declared or paid upon, or any sum set apart for the payment of dividends upon, any outstanding share of the Preferred Stock with respect to any dividend period unless all dividends for all preceding dividend periods have been declared and paid or declared and a sufficient sum set apart for the payment of such dividend, upon all outstanding shares of Preferred Stock. (d) No dividends or other distributions (other than a dividend or distribution payable solely in shares of Parity Stock or Junior Stock (in the case of Parity Stock) or Junior Stock (in the case of Junior Stock) and other than cash paid in lieu of fractional shares) may be declared, made or paid, or set apart for payment upon, any Parity

9 Stock or Junior Stock, nor may any Parity Stock or Junior Stock be redeemed, purchased or otherwise acquired for any consideration (or any money paid to or made available for a sinking fund for the redemption of any Parity Stock or Junior Stock) by or on behalf of the Company (except by conversion into or exchange for shares of Parity Stock or Junior Stock (in the case of Parity Stock) or Junior Stock (in the case of Junior Stock)), unless full Accumulated Dividends shall have been or contemporaneously are declared and paid, or are declared and a sum sufficient for the payment thereof is set apart for such payment, on the Preferred Stock and any Parity Stock for all dividend payment periods terminating on or prior to the date of such declaration, payment, redemption, purchase or acquisition. Notwithstanding the foregoing, if full dividends have not been paid on the Preferred Stock and any Parity Stock, dividends may be declared and paid on the Preferred Stock and such Parity Stock so long as the dividends are declared and paid pro rata so that the amounts of dividends declared per share on the Preferred Stock and such Parity Stock will in all cases bear to each other the same ratio that accumulated and unpaid dividends on the shares of Preferred Stock and such other Parity Stock bear to each other. (e) Holders of shares of Preferred Stock shall not be entitled to any dividends on the Preferred Stock, whether payable in cash, property or stock, in excess of full cumulative dividends. No interest, or sum of money in lieu of interest, shall be payable in respect of any dividend payment or payments on the Preferred Stock which may be in arrears. (f) The holders of shares of Preferred Stock at the close of business on a Dividend Record Date will be entitled to receive the dividend payment on those shares on the corresponding Dividend Payment Date notwithstanding the subsequent conversion thereof or the Company's default in payment of the dividend due on that Dividend Payment Date. However, shares of Preferred Stock surrendered for conversion during the period between the close of business on any Dividend Record Date and the close of business on the day immediately preceding the applicable Dividend Payment Date must be accompanied by payment of an amount equal to the dividend payable on the shares on that Dividend Payment Date. A holder of shares of Preferred Stock on a Dividend Record Date who (or whose transferee) tenders any shares for conversion on the corresponding Dividend Payment Date will receive the dividend payable by the Company on the Preferred

10 Stock on that date, and the converting holder need not include payment in the amount of such dividend upon surrender of shares of Preferred Stock for conversion. Except as provided above with respect to a voluntary conversion pursuant to Section 7, the Company shall make no payment or allowance for unpaid dividends, whether or not in arrears, on converted shares or for dividends on the shares of Common Stock issued upon conversion. 4. Change of Control. (a) Upon the occurrence of a Change of Control, each holder of Preferred Stock shall, in the event that the Market Value for the period ending on the Change of Control Date is less than the Conversion Price, have a one-time option (the "Change of Control Option") to convert all of such holder's outstanding shares of Preferred Stock into fully paid and nonassessable shares of Common Stock at an adjusted Conversion Price equal to the greater of (i) the Market Value for the period ending on the Change of Control Date and (ii) $4.0733. The Change of Control Option must be exercised, if at all, during the period of not less than 30 days nor more than 60 days commencing on the third Business Day after notice of a Change in Control has been given by the Company in accordance with Section 4(b). In lieu of issuing the shares of Common Stock issuable upon conversion in the event of a Change of Control, the Company may, at its option, make a cash payment equal to the Market Value for each share of such Common Stock otherwise issuable determined for the period ending on the Change of Control Date. Notwithstanding the foregoing, upon the occurrence of a Change of Control in which (i) each holder of Common Stock receives consideration consisting solely of common stock of the successor, acquiror or other third party (and cash paid in lieu of fractional shares) that is listed on a national securities exchange or quoted on the NASDAQ National Market and (ii) all the Common Stock has been exchanged for, converted into or acquired for common stock of the successor, acquiror or other third party (and cash in lieu of factional shares), and the Preferred Stock becomes convertible solely into such common stock, the Conversion Price will not be adjusted as described in this Section 4(a). (b) In the event of a Change of Control (other than a Change of Control described in the last sentence of Section 4(a)), notice of such Change of Control shall be given, within five Business Days of the Change of Control

11 Date, by the Company by first-class mail to each record holder of shares of Preferred Stock, at such holder's address as the same appears on the books of the Company. Each such notice shall state (i) that a Change of Control has occurred; (ii) the last day on which the Change of Control Option may be exercised (the "Expiration Date") pursuant to the terms hereof; (iii) the name and address of the Transfer Agent; and (iv) the procedures that holders must follow to exercise the Change of Control Option. (c) On or before the Expiration Date, each holder of shares of Preferred Stock wishing to exercise the Change of Control Option shall surrender the certificate or certificates representing the shares of Preferred Stock to be converted, in the manner and at the place designated in the notice described in Section 4(b), and on such date the cash or shares of Common Stock due to such holder shall be delivered to the Person whose name appears on such certificate or certificates as the owner thereof and the shares represented by each surrendered certificate shall be returned to authorized but unissued shares. Upon surrender (in accordance with the notice described in Section 4(b)) of the certificate or certificates representing any shares to be so converted (properly endorsed or assigned for transfer, if the Company shall so require and the notice shall so state), such shares shall be converted by the Company at the adjusted Conversion Price, if applicable, as described in Section 4(a). (d) The rights of holders of Preferred Stock pursuant to this Section 4 are in addition to, and not in lieu of, the rights of holders of Preferred Stock provided for in Section 7 hereof. 5. Voting. (a) The shares of Preferred Stock shall have no voting rights except as set forth below or as otherwise required by Oklahoma law from time to time: (i) If and whenever at any time or times a Voting Rights Triggering Event occurs, then the holders of shares of Preferred Stock, voting as a single class with any other preferred stock or preference securities having similar voting rights that are exercisable (the "Voting Rights Class"), will be entitled at the next regular or special meeting of stockholders of the Company to elect two additional directors of the Company, unless the Board of

12 Directors is comprised of fewer than six directors at such time, in which case the Voting Rights Class shall be entitled to elect one additional director. Upon the election of any such additional directors, the number of directors that compose the Board of Directors shall be increased by such number of additional directors. (ii) Such voting rights may be exercised at a special meeting of the holders of the shares of the Voting Rights Class, called as hereinafter provided, or at any annual meeting of stockholders held for the purpose of electing directors, and thereafter at each such annual meeting until such time as all dividends in arrears on the shares of Preferred Stock shall have been paid in full, at which time or times such voting rights and the term of the directors elected pursuant to Section 5(a)(i) shall terminate. (iii) At any time when such voting rights shall have vested in holders of shares of the Voting Rights Class, an Officer of the Company may call, and, upon written request of the record holders of shares representing at least twenty-five percent (25%) of the voting power of the shares then outstanding of the Voting Rights Class, addressed to the Secretary of the Company, shall call a special meeting of the holders of shares of the Voting Rights Class. Such meeting shall be held at the earliest practicable date upon the notice required for annual meetings of stockholders at the place for holding annual meetings of stockholders of the Company, or, if none, at a place designated by the Board of Directors. Notwithstanding the provisions of this Section 5(a)(iii), no such special meeting shall be called during a period within the 60 days immediately preceding the date fixed for the next annual meeting of stockholders in which such case, the election of directors pursuant to Section 5(a)(i) shall be held at such annual meeting of stockholders. (iv) At any meeting held for the purpose of electing directors at which the holders of the Voting Rights Class shall have the right to elect directors as provided herein, the presence in person or by proxy of the holders of shares representing more than fifty percent (50%) in voting power of the then outstanding shares of the Voting Rights Class shall be required and shall be sufficient to constitute a quorum of such class for the election of directors by such class. The affirmative vote of the holders of shares of Preferred Stock constituting a majority

13 of the shares of Preferred Stock present at such meeting, in person or by proxy, shall be sufficient to elect any such director. (v) Any director elected pursuant to the voting rights created under this Section 5(a) shall hold office until the next annual meeting of stockholders (unless such term has previously terminated pursuant to Section 5 (a)(ii)) and any vacancy in respect of any such director shall be filled only by vote of the remaining director so elected by holders of the Voting Rights Class, or if there be no such remaining director, by the holders of shares of the Voting Rights Class at a special meeting called in accordance with the procedures set forth in this Section 5, or, if no such special meeting is called, at the next annual meeting of stockholders. Upon any termination of such voting rights, the term of office of all directors elected pursuant to this Section 5 shall terminate. (vi) So long as any shares of Preferred Stock remain outstanding, unless a greater percentage shall then be required by law, the Company shall not, without the affirmative vote or consent of the holders of at least 66 2/3% of the outstanding Preferred Stock voting or consenting, as the case may be, separately as one class, (i) create, authorize or issue any class or series of Senior Stock (or any security convertible into Senior Stock) or (ii) amend the Certificate of Incorporation so as to affect adversely the specified rights, preferences, privileges or voting rights of holders of shares of Preferred Stock. (vii) In exercising the voting rights set forth in this Section 5(a), each share of Preferred Stock shall be entitled to one vote. (b) The Company may authorize, increase the authorized amount of, or issue any shares of Parity Stock or Junior Stock, without the consent of the holders of Preferred Stock, and in taking such actions the Company shall not be deemed to have affected adversely the rights, preferences, privileges or voting rights of holders of shares of Preferred Stock. 6. Liquidation Rights. (a) In the event of any liquidation, winding-up or dissolution of the Company, whether voluntary of involuntary, each holder of shares of Preferred Stock shall

14 be entitled to receive and to be paid out of the assets of the Company available for distribution to its stockholders the Liquidation Preference plus Accumulated Dividends and Accrued Dividends thereon in preference to the holders of, and before any payment or distribution is made on, any Junior Stock, including, without limitation, on any Common Stock. (b) Neither the sale, conveyance, exchange or transfer (for cash, shares of stock, securities or other consideration) of all or substantially all the assets or business of the Company (other than in connection with the liquidation, winding-up or dissolution of its business) nor the merger or consolidation of the Company into or with any other Person shall be deemed to be a liquidation, winding-up or dissolution, voluntary or involuntary, for the purposes of this Section 6. (c) After the payment to the holders of the shares of Preferred Stock of full preferential amounts provided for in this Section 6, the holders of Preferred Stock as such shall have no right or claim to any of the remaining assets of the Company. (d) In the event the assets of the Company available for distribution to the holders of shares of Preferred Stock upon any liquidation, winding-up or dissolution of the Company, whether voluntary or involuntary, shall be insufficient to pay in full all amounts to which such holders are entitled pursuant to Section 6(a), no such distribution shall be made on account of any shares of Parity Stock upon such liquidation, dissolution or winding-up unless proportionate distributable amounts shall be paid on account of the shares of Preferred Stock, ratably, in proportion to the full distributable amounts for which holders of all Preferred Stock and of any Parity Stock are entitled upon such liquidation, winding-up or dissolution. 7. Conversion. (a) Each holder of Preferred Stock shall have the right, at its option, exercisable at any time and from time to time from the Issue Date to convert, subject to the terms and provisions of this Section 7, any or all of such holder's shares of Preferred Stock. In such case, the shares of Preferred Stock shall be converted into such whole number of fully paid and nonassessable shares of Common

15 Stock as is equal, subject to Section 7(g), to the product of the number of shares of Preferred Stock being so converted multiplied by the quotient of (i) the Liquidation Preference divided by (ii) the Conversion Price (as defined below) then in effect. The Conversion Price initially shall be $7.70, subject to adjustment as set forth in Section 7(c). The conversion right of a holder of Preferred Stock shall be exercised by the holder by the surrender to the Company of the certificates representing shares to be converted at any time during usual business hours at its principal place of business or the offices of its duly appointed Transfer Agent to be maintained by it, accompanied by written notice to the Company in the form of Exhibit B that the holder elects to convert all or a portion of the shares of Preferred Stock represented by such certificate and specifying the name or names (with address) in which a certificate or certificates for shares of Common Stock are to be issued and (if so required by the Company or its duly appointed Transfer Agent) by a written instrument or instruments of transfer in form reasonably satisfactory to the Company or its duly appointed Transfer Agent duly executed by the holder or its duly authorized legal representative and transfer tax stamps or funds therefor, if required pursuant to Section 7(i). Immediately prior to the close of business on the date of receipt by the Company or its duly appointed Transfer Agent of notice of conversion of shares of Preferred Stock, each converting holder of Preferred Stock shall be deemed to be the holder of record of Common Stock issuable upon conversion of such holder's Preferred Stock notwithstanding that the share register of the Company shall then be closed or that certificates representing such Common Stock shall not then be actually delivered to such holder. Upon notice from the Company, each holder of Preferred Stock so converted shall promptly surrender to the Company, at any place where the Company shall maintain a Transfer Agent, certificates representing the shares so converted, duly endorsed in blank or accompanied by proper instruments of transfer. On the date of any conversion, all rights with respect to the shares of Preferred Stock so converted, including the rights, if any, to receive notices, will terminate, except only the rights of holders thereof to (i) receive certificates for the number of whole shares of Common Stock into which such shares of Preferred Stock have been converted and cash, in lieu of any fractional shares as provided in Section 7(f);

16 and (ii) exercise the rights to which they are entitled as holders of Common Stock. (b) If the last day for the exercise of the conversion right shall not be a Business Day, then such conversion right may be exercised on the next preceding Business Day. (c) The Conversion Price shall be subject to adjustment as follows: (i) In case the Company shall at any time or from time to time (A) pay a dividend (or other distribution) payable in shares of Common Stock on any class of capital stock (which, for purposes of this Section 7(c) shall include, without limitation, any dividends or distributions in the form of options, warrants or other rights to acquire capital stock) of the Company (other than the issuance of shares of Common Stock in connection with the payment of dividends on or the conversion of Preferred Stock); (B) subdivide the outstanding shares of Common Stock into a larger number of shares; (C) combine the outstanding shares of Common Stock into a smaller number of shares; (D) issue any shares of its capital stock in a reclassification of the Common Stock; or (E) pay a dividend or make a distribution to all holders of shares of Common Stock (other than a dividend or distribution subject to Section 7(c)(ii)) pursuant to a stockholder rights plan, "poison pill" or similar arrangement and excluding dividends payable on the Preferred Stock then, and in each such case, the Conversion Price in effect immediately prior to such event shall be adjusted (and any other appropriate actions shall be taken by the Company) so that the holder of any share of Preferred Stock thereafter surrendered for conversion shall be entitled to receive the number of shares of Common Stock that such holder would have owned or would have been entitled to receive upon or by reason of any of the events described above, had such share of Preferred Stock been converted into shares of Common Stock immediately prior to the occurrence of such event. An adjustment made pursuant to this Section 7(c)(i) shall become effective retroactively (x) in the case of any such dividend or distribution, to the day immediately following the close of business on the record date for the determination of holders of Common Stock entitled to receive such dividend or distribution or (y) in the case of any such subdivision, combination or reclassification, to the close of business on the day upon which such corporate action becomes effective.

17 (ii) In case the Company shall at any time or from time to time issue to all holders of its Common Stock rights, options or warrants entitling the holders thereof to subscribe for or purchase shares of Common Stock (or securities convertible into or exchangeable for shares of Common Stock) at a price per share less than the Market Value for the period ending on the date of issuance (treating the price per share of any security convertible, or exchangeable or exercisable into Common Stock as equal to (A) the sum of the price paid to acquire such security convertible, exchangeable or exercisable into Common Stock plus any additional consideration payable (without regard to any anti-dilution adjustments) upon the conversion, exchange or exercise of such security into Common Stock divided by (B) the number of shares of Common Stock into which such convertible, exchangeable or exercisable security is initially convertible, exchangeable or exercisable), other than (I) issuances of such rights, options or warrants if the holder of Preferred Stock would be entitled to receive such rights, options or warrants upon conversion at any time of shares of Preferred Stock into Common Stock and (II) issuances that are subject to certain triggering events (until such time as such triggering events occur), then, and in each such case, the Conversion Price then in effect shall be adjusted by dividing the Conversion Price in effect on the day immediately prior to the record date of such issuance by a fraction (y) the numerator of which shall be the sum of the number of shares of Common Stock outstanding on such record date plus the number of additional shares of Common Stock issued or to be issued upon or as a result of the issuance of such rights, options or warrants (or the maximum number into or for which such convertible or exchangeable securities initially may convert or exchange or for which such options, warrants or other rights initially may be exercised) and (z) the denominator of which shall be the sum of the number of shares of Common Stock outstanding on such record date plus the number of shares of Common Stock which the aggregate consideration for the total number of such additional shares of Common Stock so issued (or into or for which such convertible or exchangeable securities may convert or exchange or for which such options, warrants or other rights may be exercised plus the aggregate amount of any additional consideration initially payable upon the conversion, exchange or exercise of such security) would purchase at the Market Value for the period ending on the date of conversion; provided, that if the Company distributes rights or warrants (other than those referred to above in this subparagraph (c)(ii)) pro rata to the holders

18 of Common Stock, so long as such rights or warrants have not expired or been redeemed by the Company, (y) the holder of any Preferred Stock surrendered for conversion shall be entitled to receive upon such conversion, in addition to the shares of Common Stock then issuable upon such conversion (the "Conversion Shares"), a number of rights or warrants to be determined as follows: (i) if such conversion occurs on or prior to the date for the distribution to the holders of rights or warrants of separate certificates evidencing such rights or warrants (the "Distribution Date"), the same number of rights or warrants to which a holder of a number of shares of Common Stock equal to the number of Conversion Shares is entitled at the time of such conversion in accordance with the terms and provisions applicable to the rights or warrants and (ii) if such conversion occurs after the Distribution Date, the same number of rights or warrants to which a holder of the number of shares of Common Stock into which such Preferred Stock was convertible immediately prior to such Distribution Date would have been entitled on such Distribution Date had such Preferred Stock been converted immediately prior to such Distribution Date in accordance with the terms and provisions applicable to the rights and warrants, and (z) the Conversion Price shall not be subject to adjustment on account of any declaration, distribution or exercise of such rights or warrants. (iii) In case the Company shall at any time or from time to time (A) make a pro rata distribution to all holders of shares of its Common Stock consisting exclusively of cash (excluding any cash portion of distributions referred to in clause (E) of paragraph (c)(i) above, or cash distributed upon a merger or consolidation to which paragraph (g) below applies), that, when combined together with (x) all other such all-cash distributions made within the then-preceding 12 months in respect of which no adjustment has been made and (y) any cash and the fair market value of other consideration paid or payable in respect of any tender offer by the Company or any of its subsidiaries for shares of Common Stock concluded within the then-preceding 12 months in respect of which no adjustment pursuant to this Section 7(c) has been made, in the aggregate exceeds 15% of the Company's market capitalization (defined as the product of the Market Value for the period ending on the record date of such distribution times the number of shares of Common Stock outstanding on such record date) on the record date of such distribution; (B) complete a tender or exchange offer by the Company or any of its subsidiaries for shares of Common Stock that involves an

19 aggregate consideration that, together with (I) any cash and other consideration payable in a tender or exchange offer by the Company or any of its subsidiaries for shares of Common Stock expiring within the then-preceding 12 months in respect of which no adjustment pursuant to this Section 7(c) has been made and (II) the aggregate amount of any such all-cash distributions referred to in clause (A) above to all holders of shares of Common Stock within the then-preceding 12 months in respect of which no adjustments have been made, exceeds 15% of the Company's market capitalization on the expiration of such tender offer; or (C) make a distribution to all holders of its Common Stock consisting of evidences of indebtedness, shares of its capital stock other than Common Stock or assets (including securities, but excluding those dividends, rights, options, warrants and distributions referred to in paragraphs (c)(i), (c)(ii) above or this (c)(iii)), then, and in each such case, the Conversion Price then in effect shall be adjusted by dividing the Conversion Price in effect immediately prior to the date of such distribution or completion of such tender or exchange offer, as the case may be, by a fraction (x) the numerator of which shall be the Market Value for the period ending on the record date referred to below, or, if such adjustment is made upon the completion of a tender or exchange offer, on the payment date for such offer, and (y) the denominator of which shall be such Market Value less the then fair market value (as determined by the Board of Directors of the Company) of the portion of the cash, evidences of indebtedness, securities or other assets so distributed or paid in such tender or exchange offer, applicable to one share of Common Stock (but such denominator shall not be less than one); provided, however, that no adjustment shall be made with respect to any distribution of rights to purchase securities of the Company if the holder of shares of Preferred Stock would otherwise be entitled to receive such rights upon conversion at any time of shares of Preferred Stock into shares of Common Stock unless such rights are subsequently redeemed by the Company, in which case such redemption shall be treated for purposes of this Section 7(c)(iii) as a dividend on the Common Stock. Such adjustment shall be made whenever any such distribution is made or tender or exchange offer is completed, as the case may be, and shall become effective retroactively to a date immediately following the close of business on the record date for the determination of stockholders entitled to receive such distribution.

20 (iv) In the case the Company at any time or from time to time shall take any action affecting its Common Stock (it being understood that the issuance or sale of shares of Common Stock (or securities convertible into or exchangeable for shares of Common Stock, or any options, warrants or other rights to acquire shares of Common Stock) to any Person at a price per share less than the Conversion Price then in effect shall not be deemed such an action), other than an action described in any of Section 7(c)(i) through Section 7(c)(iii), inclusive, or Section 7(g), then the Conversion Price shall be adjusted in such manner and at such time as the Board of Directors of the Company in good faith determines to be equitable in the circumstances (such determination to be evidenced in a resolution, a certified copy of which shall be mailed to the holders of the Preferred Stock). (v) Notwithstanding anything herein to the contrary, no adjustment under this Section 7(c) need be made to the Conversion Price unless such adjustment would require an increase or decrease of at least 1% of the Conversion Price then in effect. Any lesser adjustment shall be carried forward and shall be made at the time of and together with the next subsequent adjustment, if any, which, together with any adjustment or adjustments so carried forward, shall amount to an increase or decrease of at least 1% of such Conversion Price. (vi) The Company reserves the right to make such reductions in the Conversion Price in addition to those required in the foregoing provisions as it considers advisable in order that any event treated for Federal income tax purposes as a dividend of stock or stock rights will not be taxable to the recipients. In the event the Company elects to make such a reduction in the Conversion Price, the Company will comply with the requirements of Rule 14e-1 under the Exchange Act, and any other securities laws and regulations thereunder if and to the extent that such laws and regulations are applicable in connection with the reduction of the Conversion Price. (d) If the Company shall take a record of the holders of its Common Stock for the purpose of entitling them to receive a dividend or other distribution, and shall thereafter (and before the dividend or distribution has been paid or delivered to stockholders) legally abandon its plan to pay or deliver such dividend or distribution, then thereafter no adjustment in the Conversion Price then in

21 effect shall be required by reason of the taking of such record. (e) Upon any increase or decrease in the Conversion Price, then, and in each such case, the Company promptly shall deliver to each holder of Preferred Stock a certificate signed by an authorized officer of the Company, setting forth in reasonable detail the event requiring the adjustment and the method by which such adjustment was calculated and specifying the increased or decreased Conversion Price then in effect following such adjustment. (f) No fractional shares or securities representing fractional shares of Common Stock shall be issued upon the conversion of any shares of Preferred Stock, whether voluntary or mandatory. If more than one share of Preferred Stock shall be surrendered for conversion at one time by the same holder, the number of full shares of Common Stock issuable upon conversion thereof shall be computed on the basis of the aggregate Liquidation Preference of the shares of Preferred Stock so surrendered. If the conversion of any share or shares of Preferred Stock results in a fraction, an amount equal to such fraction multiplied by the last reported sale price of the Common Stock on the NYSE (or on such other national securities exchange or automated quotation system on which the Common Stock is then listed for trading or authorized for quotation or, if the Common Stock is not then so listed or authorized for quotation, an amount determined in good faith by the Board of Directors to be the fair value of the Common Stock) at the close of business on the trading day next preceding the day of conversion shall be paid to such holder in cash by the Company. (g) In the event of any reclassification of outstanding shares of Common Stock (other than a change in par value, or from par value to no par value, or from no par value to par value), or in the event of any consolidation or merger of the Company with or into another Person or any merger of another Person with or into the Company (other than a consolidation or merger in which the Company is the resulting or surviving Person and which does not result in any reclassification or change of outstanding Common Stock), or in the event of any sale or other disposition to another Person of all or substantially all of the assets of the Company (computed on a consolidated basis) (any of the foregoing, a "Transaction"), each share of Preferred Stock then outstanding shall, without the consent of any holder of

22 Preferred Stock, become convertible at any time, at the option of the holder thereof, only into the kind and amount of securities (of the Company or another issuer), cash and other property receivable upon such Transaction by a holder of the number of shares of Common Stock into which such share of Preferred Stock could have been converted immediately prior to such Transaction, after giving effect to any adjustment event. The provisions of this Section 7(g) and any equivalent thereof in any such securities similarly shall apply to successive Transactions. The provisions of this Section 7(g) shall be the sole right of holders of Preferred Stock in connection with any Transaction and such holders shall have no separate vote thereon. (h) The Company shall at all times reserve and keep available for issuance upon the conversion of the Preferred Stock such number of its authorized but unissued shares of Common Stock as will from time to time be sufficient to permit the conversion of all outstanding shares of Preferred Stock, and shall take all action required to increase the authorized number of shares of Common Stock if at any time there shall be insufficient unissued shares of Common Stock to permit such reservation or to permit the conversion of all outstanding shares of Preferred Stock. (i) The issuance or delivery of certificates for Common Stock upon the conversion of shares of Preferred Stock shall be made without charge to the converting holder of shares of Preferred Stock for such certificates or for any tax in respect of the issuance or delivery of such certificates or the securities represented thereby, and such certificates shall be issued or delivered in the respective names of, or in such names as may be directed by, the holders of the shares of Preferred Stock converted; provided, however, that the Company shall not be required to pay any tax which may be payable in respect of any transfer involved in the issuance and delivery of any such certificate in a name other than that of the holder of the shares of Preferred Stock converted, and the Company shall not be required to issue or deliver such certificate unless or until the Person or Persons requesting the issuance or delivery thereof shall have paid to the Company the amount of such tax or shall have established to the reasonable satisfaction of the Company that such tax has been paid.

23 8. Mandatory Conversion. (a) At any time on or after November 20, 2004, the Company shall have the right, at its option, to cause the Preferred Stock, in whole but not in part, to be automatically converted into that number of whole shares of Common Stock for each share of Preferred Stock equal to the quotient of (i) the Liquidation Preference divided by (ii) the Conversion Price then in effect, with any resulting fractional shares of Common Stock to be settled in accordance with Section 7(f). The Company may exercise its right to cause a mandatory conversion pursuant to this Section 8(a) only if the closing price of the Common Stock equals or exceeds 130% of the Conversion Price then in effect for at least 20 trading days in any consecutive 30-day trading period on the NYSE (or such other national securities exchange or automated quotation system on which the Common Stock is then listed or authorized for quotation or, if the Common Stock is not so listed or authorized for quotation, an amount determined in good faith by the Board of Directors to be the fair value of the Common Stock), including the last trading day of such 30-day period, ending on the trading day prior to the Company's issuance of a press release announcing the mandatory conversion as described in Section 8(b). (b) To exercise the mandatory conversion right described in Section 8(a), the Company must issue a press release for publication on the Dow Jones News Service prior to the opening of business on the first trading day following any date on which the conditions described in Section 8(a) are met, announcing such a mandatory conversion. The Company shall also give notice by mail or by publication (with subsequent prompt notice by mail) to the holders of Preferred Stock (not more than four Business Days after the date of the press release) of the mandatory conversion announcing the Company's intention to convert the Preferred Stock. The conversion date will be a date selected by the Company (the "Mandatory Conversion Date") and will be no more than five days after the date on which the Company issues the press release described in this Section 8(b). (c) In addition to any information required by applicable law or regulation, the press release and notice of a mandatory conversion described in Section 8(b) shall state, as appropriate: (i) the Mandatory Conversion Date; (ii) the number of shares of Common Stock to be issued upon

24 conversion of each share of Preferred Stock; (iii) the number of shares of Preferred Stock to be converted; and (iv) that dividends on the Preferred Stock to be converted will cease to accrue on the Mandatory Conversion Date. (d) On and after the Mandatory Conversion Date, dividends will cease to accrue on the Preferred Stock called for a mandatory conversion pursuant to Section 8(a) and all rights of holders of such Preferred Stock will terminate except for the right to receive the whole shares of Common Stock issuable upon conversion thereof and cash, in lieu of any fractional shares of Common Stock in accordance with Section 7(f). The dividend payment with respect to the Preferred Stock called for a mandatory conversion pursuant to Section 8(a) on a date during the period between the close of business on any Dividend Record Date to the close of business on the corresponding Dividend Payment Date will be payable on such Dividend Payment Date to the record holder of such share on such Dividend Record Date if such share has been converted after such Dividend Record Date and prior to such Dividend Payment Date. Except as provided in the immediately preceding sentence with respect to a mandatory conversion pursuant to Section 8(a), no payment or adjustment will be made upon conversion of Preferred Stock for Accrued Dividends or for dividends with respect to the Common Stock issued upon such conversion. (e) The Company may not authorize, issue a press release or give notice of any mandatory conversion pursuant to Section 8(a) unless, prior to giving the conversion notice, all Accumulated Dividends on the Preferred Stock for periods ended prior to the date of such conversion notice shall have been paid in cash. (f) In addition to the mandatory conversion right described in Section 8(a), if there are less than 250,000 shares of Preferred Stock outstanding, the Company shall have the right, at any time on or after November 20, 2006, at its option, to cause the Preferred Stock to be automatically converted into that number of whole shares of Common Stock equal to the quotient of (i) the Liquidation Preference divided by (ii) the lesser of (A) the Conversion Price then in effect and (B) the Market Value for the period ending on the second trading day immediately prior to the Mandatory Conversion Date, with any resulting fractional shares of Common Stock to be settled in cash in accordance with Section 7(f). The provisions of clauses (b), (c), (d) and (e) of this Section 8 shall apply to any mandatory

25 conversion pursuant to this clause (f); provided that (i) the Mandatory Conversion Date described in Section 8(b) shall not be less than 15 days nor more than 30 days after the date on which the Company issues a press release pursuant to Section 8(b) announcing such mandatory conversion and (ii) the press release and notice of mandatory conversion described in Section 8(c) will not state the number of shares of Common Stock to be issued upon conversion of each share of Preferred Stock. 9. Consolidation, Merger and Sale of Assets. (a) The Company, without the consent of the holders of any of the outstanding Preferred Stock, may consolidate with or merge into any other Person or convey, transfer or lease all or substantially all its assets to any Person or may permit any Person to consolidate with or merge into, or transfer or lease all or substantially all its properties to, the Company; provided, however, that (a) the successor, transferee or lessee is organized under the laws of the United States or any political subdivision thereof; (b) the shares of Preferred Stock will become shares of such successor, transferee or lessee, having in respect of such successor, transferee or lessee the same powers, preferences and relative participating, optional or other special rights and the qualification, limitations or restrictions thereon, the Preferred Stock had immediately prior to such transaction; and (c) the Company delivers to the Transfer Agent an Officers' Certificate and an Opinion of Counsel stating that such transaction complies with this Certificate of Designation. (b) Upon any consolidation by the Company with, or merger by the Company into, any other person or any conveyance, transfer or lease of all or substantially all the assets of the Company as described in Section 9(a), the successor resulting from such consolidation or into which the Company is merged or the transferee or lessee to which such conveyance, transfer or lease is made, will succeed to, and be substituted for, and may exercise every right and power of, the Company under the shares of Preferred Stock, and thereafter, except in the case of a lease, the predecessor (if still in existence) will be released from its obligations and covenants with respect to the Preferred Stock.

26 10. SEC Reports. Whether or not the Company is required to file reports with the Commission, if any shares of Preferred Stock are outstanding, the Company shall file with the Commission all such reports and other information as it would be required to file with the Commission by Sections 13(a)or 15(d) under the Exchange Act. The Company shall supply each holder of Preferred Stock, upon request, without cost to such holder, copies of such reports or other information. 11. Certificates. (a) Form and Dating. The Preferred Stock and the Transfer Agent's certificate of authentication shall be substantially in the form of Exhibit A, which is hereby incorporated in and expressly made a part of this Certificate of Designation. The Preferred Stock certificate may have notations, legends or endorsements required by law, stock exchange rule, agreements to which the Company is subject, if any, or usage (provided that any such notation, legend or endorsement is in a form acceptable to the Company). Each Preferred Stock certificate shall be dated the date of its authentication. The terms of the Preferred Stock certificate set forth in Exhibit A are part of the terms of this Certificate of Designation. (i) Global Preferred Stock. The Preferred Stock shall be issued initially in the form of one or more fully registered global certificates with the global securities legend and restricted securities legend set forth in Exhibit A hereto (the "Global Preferred Stock"), which shall be deposited on behalf of the purchasers represented thereby with the Transfer Agent, as custodian for DTC (or with such other custodian as DTC may direct), and registered in the name of DTC or a nominee of DTC, duly executed by the Company and authenticated by the Transfer Agent as hereinafter provided. The number of shares of Preferred Stock represented by Global Preferred Stock may from time to time be increased or decreased by adjustments made on the records of the Transfer Agent and DTC or its nominee as hereinafter provided. With respect to shares of Preferred Stock that are not "restricted securities" as defined in Rule 144 on a conversion date, all shares of Common Stock distributed on such conversion date will be freely transferable without restriction under the Securities Act (other than by affiliates), and such shares will be eligible for receipt in global form through the facilities of DTC.

27 (ii) Book-Entry Provisions. In the event Global Preferred Stock is deposited with or on behalf of DTC, the Company shall execute and the Transfer Agent shall authenticate and deliver initially one or more Global Preferred Stock certificates that (a) shall be registered in the name of DTC for such Global Preferred Stock or the nominee of DTC and (b) shall be delivered by the Transfer Agent to DTC or pursuant to DTC's instructions or held by the Transfer Agent as custodian for DTC. Members of, or participants in, DTC ("Agent Members") shall have no rights under this Certificate of Designation with respect to any Global Preferred Stock held on their behalf by DTC or by the Transfer Agent as the custodian of DTC or under such Global Preferred Stock, and DTC may be treated by the Company, the Transfer Agent and any agent of the Company or the Transfer Agent as the absolute owner of such Global Preferred Stock for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall prevent the Company, the Transfer Agent or any agent of the Company or the Transfer Agent from giving effect to any written certification, proxy or other authorization furnished by DTC or impair, as between DTC and its Agent Members, the operation of customary practices of DTC governing the exercise of the rights of a holder of a beneficial interest in any Global Preferred Stock. (iii) Certificated Preferred Stock; Certificated Common Stock. Except as provided in this paragraph 11(a) or in paragraph 11 (c), owners of beneficial interests in Global Preferred Stock will not be entitled to receive physical delivery of Preferred Stock in fully registered certificated form ("Certificated Preferred Stock"). With respect to shares of Preferred Stock that are "restricted securities" as defined in Rule 144 on a conversion date, all shares of Common Stock issuable on conversion of such shares on such conversion date will be issued in fully registered certificated form ("Certificated Common Stock"). Certificates of Certificated Common Stock will be mailed or made available at the office of the Transfer Agent for the Preferred Stock on or as soon as reasonably practicable after the relevant conversion date to the converting holder. After a transfer of any Preferred Stock or Certificated Common Stock during the period of the effectiveness of a Shelf Registration Statement with respect to such Preferred Stock or such Certificated Common Stock, all requirements pertaining to legends on such Preferred

28 Stock (including Global Preferred Stock) or Certificated Common Stock will cease to apply, the requirements requiring that any such Certificated Common Stock issued to Holders be issued in certificated form, as the case may, will cease to apply, and Preferred Stock or Common Stock, as the case may be, in global or fully registered certificated form, in either case without legends, will be available to the transferee of the Holder of such Preferred Stock or Certificated Common Stock upon exchange of such transferring Holder's Preferred Stock or Common Stock or directions to transfer such Holder's interest in the Global Preferred Stock, as applicable. (b) Execution and Authentication. One Officer shall sign the Preferred Stock certificate for the Company by manual or facsimile signature. If an Officer whose signature is on a Preferred Stock certificate no longer holds that office at the time the Transfer Agent authenticates the Preferred Stock certificate, the Preferred Stock certificate shall be valid nevertheless. A Preferred Stock certificate shall not be valid until an authorized signatory of the Transfer Agent manually signs the certificate of authentication on the Preferred Stock certificate. The signature shall be conclusive evidence that the Preferred Stock certificate has been authenticated under this Certificate of Designation. The Transfer Agent shall authenticate and deliver certificates for up to 3,000,000 shares of Preferred Stock for original issue upon a written order of the Company signed by two Officers or by an Officer and an Assistant Treasurer of the Company. Such order shall specify the number of shares of Preferred Stock to be authenticated and the date on which the original issue of Preferred Stock is to be authenticated. The Transfer Agent may appoint an authenticating agent reasonably acceptable to the Company to authenticate the certificates for Preferred Stock. Unless limited by the terms of such appointment, an authenticating agent may authenticate certificates for Preferred Stock whenever the Transfer Agent may do so. Each reference in this Certificate of Designation to authentication by the Transfer Agent includes authentication by such agent. An

29 authenticating agent has the same rights as the Transfer Agent or agent for service of notices and demands. (c) Transfer and Exchange. (i) Transfer and Exchange of Certificated Preferred Stock. When Certificated Preferred Stock is presented to the Transfer Agent with a request to register the transfer of such Certificated Preferred Stock or to exchange such Certificated Preferred Stock for an equal number of shares of Certificated Preferred Stock, the Transfer Agent shall register the transfer or make the exchange as requested if its reasonable requirements for such transaction are met; provided, however, that the Certificated Preferred Stock surrendered for transfer or exchange: (1) shall be duly endorsed or accompanied by a written instrument of transfer in form reasonably satisfactory to the Company and the Transfer Agent, duly executed by the Holder thereof or its attorney duly authorized in writing; and (2) is being transferred or exchanged pursuant to an effective registration statement under the Securities Act or pursuant to clause (I) or (II) below, and is accompanied by the following additional information and documents, as applicable: (I) if such Certificated Preferred Stock is being delivered to the Transfer Agent by a Holder for registration in the name of such Holder, without transfer, a certification from such Holder to that effect in substantially the form of Exhibit C hereto; or (II) if such Certificated Preferred Stock is being transferred to the Company or to a "qualified institutional buyer" ("QIB") in accordance with Rule 144A under the Securities Act or pursuant to an exemption from registration in accordance with Rule 144 under the Securities Act, (i) a certification to that effect (in substantially the form of Exhibit C hereto) and (ii) if the Company so requests, an Opinion of Counsel or other evidence reasonably satisfactory to it as to the compliance with the restrictions set forth in the legend set forth in paragraph 11 (c) (vii).

30 (ii) Restrictions on Transfer of Certificated Preferred Stock for a Beneficial Interest in Global Preferred Stock. Certificated Preferred Stock may not be exchanged for a beneficial interest in Global Preferred Stock except upon satisfaction of the requirements set forth below. Upon receipt by the Transfer Agent of Certificated Preferred Stock, duly endorsed or accompanied by appropriate instruments of transfer, in form reasonably satisfactory to the Company and the Transfer Agent, together with written instructions directing the Transfer Agent to make, or to direct DTC to make, an adjustment on its books and records with respect to such Global Preferred Stock to reflect an increase in the number of shares of Preferred Stock represented by the Global Preferred Stock, then the Transfer Agent shall cancel such Certificated Preferred Stock and cause, or direct DTC to cause, in accordance with the standing instructions and procedures existing between DTC and the Transfer Agent, the number of shares of Preferred Stock represented by the Global Preferred Stock to be increased accordingly. If no Global Preferred Stock is then outstanding, the Company shall issue and the Transfer Agent shall authenticate, upon written order of the Company in the form of an Officers' Certificate, a new Global Preferred Stock representing the appropriate number of shares. (iii) Transfer and Exchange of Global Preferred Stock. The transfer and exchange of Global Preferred Stock or beneficial interests therein shall be effected through DTC, in accordance with this Certificate of Designation (including applicable restrictions on transfer set forth herein, if any) and the procedures of DTC therefor. (iv) Transfer of a Beneficial Interest in Global Preferred Stock for a Certificated Preferred Stock. (1) Any Person having a beneficial interest in Preferred Stock that is being transferred or exchanged pursuant to an effective registration statement under the Securities Act or pursuant to an exemption from registration in accordance with Rule 144 may upon request, but only with the consent of the Company, and if accompanied by a certification from such Person to that effect (in substantially the form of Exhibit C hereto), exchange such beneficial interest for Certificated Preferred Stock representing the same number of shares of Preferred Stock. Upon receipt by the Transfer Agent of written instructions or such other form of instructions as is customary for DTC from

31 DTC or its nominee on behalf of any Person having a beneficial interest in Global Preferred Stock and upon receipt by the Transfer Agent of a written order or such other form of instructions as is customary for DTC or the Person designated by DTC as having such a beneficial interest in a Transfer Restricted Security only, then, the Transfer Agent or DTC, at the direction of the Transfer Agent, will cause, in accordance with the standing instructions and procedures existing between DTC and the Transfer Agent, the number of shares of Preferred Stock represented by Global Preferred Stock to be reduced on its books and records and, following such reduction, the Company will execute and the Transfer Agent will authenticate and deliver to the transferee Certificated Preferred Stock. (2) Certificated Preferred Stock issued in exchange for a beneficial interest in a Global Preferred Stock pursuant to this paragraph 11 (c) (iv) shall be registered in such names and in such authorized denominations as DTC, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Transfer Agent. The Transfer Agent shall deliver such Certificated Preferred Stock to the Persons in whose names such Preferred Stock are so registered in accordance with the instructions of DTC. (v) Restrictions on Transfer and Exchange of Global Preferred Stock. (1) Notwithstanding any other provisions of this Certificate of Designation (other than the provisions set forth in paragraph 11 (c) (vi)), Global Preferred Stock may not be transferred as a whole except by DTC to a nominee of DTC or by a nominee of DTC to DTC or another nominee of DTC or by DTC or any such nominee to a successor depository or a nominee of such successor depository. (2) In the event that the Global Preferred Stock is exchanged for Preferred Stock in definitive registered form pursuant to paragraph 11 (c)(vi) prior to the effectiveness of a Shelf Registration Statement with respect to such securities, such Preferred Stock may be exchanged only in accordance with such procedures as are substantially consistent with the provisions of this paragraph 11 (c) (including the

32 certification requirements set forth in the Exhibits to this Certificate of Designation intended to ensure that such transfers comply with Rule 144A or such other applicable exemption from registration under the Securities Act, as the case may be) and such other procedures as may from time to time be adopted by the Company. (vi) Authentication of Certificated Preferred Stock. If at any time: (1) DTC notifies the Company that DTC is unwilling or unable to continue as depository for the Global Preferred Stock and a successor depository for the Global Preferred Stock is not appointed by the Company within 90 days after delivery of such notice; (2) DTC ceases to be a clearing agency registered under the Exchange Act; (3) there shall have occurred and be continuing a Voting Rights Triggering Event; or (4) the Company, in its sole discretion, notifies the Transfer Agent in writing that it elects to cause the issuance of Certificated Preferred Stock under this Certificate of Designation, then the Company will execute, and the Transfer Agent, upon receipt of a written order of the Company signed by two Officers or by an Officer and an Assistant Treasurer of the Company requesting the authentication and delivery of Certificated Preferred Stock to the Persons designated by the Company, will authenticate and deliver Certificated Preferred Stock equal to the number of shares of Preferred Stock represented by the Global Preferred Stock, in exchange for such Global Preferred Stock. (vii) Legend. (1) Except as permitted by the following paragraph (2) and in paragraph 11 (a) (iii), each certificate evidencing the Global Preferred Stock, the Certificated Preferred Stock and Certificated Common Stock shall bear a legend in substantially the following form: "THE SECURITY EVIDENCED HEREBY (OR ITS PREDECESSOR) (AND THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE) WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES

33 SECURITIES ACT OF 1933 (THE "SECURITIES ACT") AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH PURCHASER OF THE SECURITY EVIDENCED HEREBY (OR THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE) IS HEREBY NOTIFIED THAT THE SELLER MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER. THE HOLDER OF THE SECURITY EVIDENCED HEREBY (AND OF THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE ) AGREES FOR THE BENEFIT OF THE COMPANY THAT (A) SUCH SECURITY (AND THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE) MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1) TO A PERSON WHO THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (2) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE), (3) TO THE COMPANY OR (4) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (1) THROUGH (4) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE."(1) (2) Upon any sale or transfer of a Transfer Restricted Security (including any Transfer Restricted Security represented by Global Preferred Stock) pursuant to Rule 144 under the Securities Act or an effective registration statement under the Securities Act: (I) in the case of any Transfer Restricted Security that is a Certificated Preferred Stock, the Transfer Agent shall permit the Holder thereof to exchange such Transfer Restricted Security for Certificated Preferred Stock that does not bear the legend set forth above and rescind any - --------------------------- (1) Subject to removal upon registration under the Securities Act of 1933 or otherwise when the security shall no longer be a Transfer Restricted Security.

34 restriction on the transfer of such Transfer Restricted Security; and (II) in the case of any Transfer Restricted Security that is represented by a Global Preferred Stock, with the consent of the Company, the Transfer Agent shall permit the Holder thereof to exchange such Transfer Restricted Security for Certificated Preferred Stock that does not bear the legend set forth above and rescind any restriction on the transfer of such Transfer Restricted Security, if the Holder's request for such exchange was made in reliance on Rule 144 and the Holder certifies to that effect in writing to the Transfer Agent (such certification to be in the form set forth in Exhibit C hereto). (viii) Cancelation or Adjustment of Global Preferred Stock. At such time as all beneficial interests in Global Preferred Stock have either been exchanged for Certificated Preferred Stock, converted or canceled, such Global Preferred Stock shall be returned to DTC for cancelation or retained and canceled by the Transfer Agent. At any time prior to such cancelation, if any beneficial interest in Global Preferred Stock is exchanged for Certificated Preferred Stock, converted or canceled, the number of shares of Preferred Stock represented by such Global Preferred Stock shall be reduced and an adjustment shall be made on the books and records of the Transfer Agent with respect to such Global Preferred Stock, by the Transfer Agent or DTC, to reflect such reduction. (ix) Obligations with Respect to Transfers and Exchanges of Preferred Stock. (1) To permit registrations of transfers and exchanges, the Company shall execute and the Transfer Agent shall authenticate Certificated Preferred Stock and Global Preferred Stock as required pursuant to the provisions of this paragraph 11 (c). (2) All Certificated Preferred Stock and Global Preferred Stock issued upon any registration of transfer or exchange of Certificated Preferred Stock or Global Preferred Stock shall be the valid obligations of the Company, entitled to the same benefits under this Certificate of Designation as the Certificated Preferred Stock or Global Preferred Stock surrendered upon such registration of transfer or exchange.

35 (3) Prior to due presentment for registration of transfer of any shares of Preferred Stock, the Transfer Agent and the Company may deem and treat the Person in whose name such shares of Preferred Stock are registered as the absolute owner of such Preferred Stock and neither the Transfer Agent nor the Company shall be affected by notice to the contrary. (4) No service charge shall be made to a Holder for any registration of transfer or exchange upon surrender of any Preferred Stock certificate or Common Stock certificate at the office of the Transfer Agent maintained for that purpose. However, the Company may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any registration of transfer or exchange of Preferred Stock certificates or Common Stock certificates. (5) Upon any sale or transfer of shares of Preferred Stock (including any Preferred Stock represented by a Global Preferred Stock Certificate) or of Certificated Common Stock pursuant to an effective registration statement under the Securities Act, pursuant to Rule 144 under the Securities Act or pursuant to an Opinion of Counsel reasonably satisfactory to the Company that no legend is required: (A) in the case of any Certificated Preferred Stock or Certificated Common Stock, the Company and the Transfer Agent shall permit the holder thereof to exchange such Preferred Stock or Certificated Common Stock for Certificated Preferred Stock or Certificated Common Stock, as the case may be, that does not bear the legend set forth in paragraph (c)(vii) above and rescind any restriction on the transfer of such Preferred Stock or Common Stock issuable in respect of the conversion of the Preferred Stock; and (B) in the case of any Global Preferred Stock, such Preferred Stock shall not be required to bear the legend set forth in paragraph (c)(vii) above but shall continue to be subject to the provisions of paragraph (c) (iv) hereof; provided, however, that with respect to any request for an

36 exchange of Preferred Stock that is represented by Global Preferred Stock for Certificated Preferred Stock that does not bear the legend set forth in paragraph (c)(vii) above in connection with a sale or transfer thereof pursuant to Rule 144 (and based upon an Opinion of Counsel if the Company so requests), the Holder thereof shall certify in writing to the Transfer Agent that such request is being made pursuant to Rule 144 (such certification to be substantially in the form of Exhibit C hereto). (x) No Obligation of the Transfer Agent. (1) The Transfer Agent shall have no responsibility or obligation to any beneficial owner of Global Preferred Stock, a member of, or a participant in DTC or any other Person with respect to the accuracy of the records of DTC or its nominee or of any participant or member thereof, with respect to any ownership interest in the Preferred Stock or with respect to the delivery to any participant, member, beneficial owner or other Person (other than DTC) of any notice or the payment of any amount, under or with respect to such Global Preferred Stock. All notices and communications to be given to the Holders and all payments to be made to Holders under the Preferred Stock shall be given or made only to the Holders (which shall be DTC or its nominee in the case of the Global Preferred Stock). The rights of beneficial owners in any Global Preferred Stock shall be exercised only through DTC subject to the applicable rules and procedures of DTC. The Transfer Agent may rely and shall be fully protected in relying upon information furnished by DTC with respect to its members, participants and any beneficial owners. (2) The Transfer Agent shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under this Certificate of Designation or under applicable law with respect to any transfer of any interest in any Preferred Stock (including any transfers between or among DTC participants, members or beneficial owners in any Global Preferred Stock) other than to require delivery of such certificates and other documentation

37 or evidence as are expressly required by, and to do so if and when expressly required by, the terms of this Certificate of Designation, and to examine the same to determine substantial compliance as to form with the express requirements hereof. (d) Replacement Certificates. If a mutilated Preferred Stock certificate is surrendered to the Transfer Agent or if the Holder of a Preferred Stock certificate claims that the Preferred Stock certificate has been lost, destroyed or wrongfully taken, the Company shall issue and the Transfer Agent shall countersign a replacement Preferred Stock certificate if the reasonable requirements of the Transfer Agent and of Section 8-405 of the Uniform Commercial Code as in effect in the State of New York are met. If required by the Transfer Agent or the Company, such Holder shall furnish an indemnity bond sufficient in the judgment of the Company and the Transfer Agent to protect the Company and the Transfer Agent from any loss which either of them may suffer if a Preferred Stock certificate is replaced. The Company and the Transfer Agent may charge the Holder for their expenses in replacing a Preferred Stock certificate. (e) Temporary Certificates. Until definitive Preferred Stock certificates are ready for delivery, the Company may prepare and the Transfer Agent shall countersign temporary Preferred Stock certificates. Temporary Preferred Stock certificates shall be substantially in the form of definitive Preferred Stock certificates but may have variations that the Company considers appropriate for temporary Preferred Stock certificates. Without unreasonable delay, the Company shall prepare and the Transfer Agent shall countersign definitive Preferred Stock certificates and deliver them in exchange for temporary Preferred Stock certificates. (f) Cancelation. (i) In the event the Company shall purchase or otherwise acquire Certificated Preferred Stock, the same shall thereupon be delivered to the Transfer Agent for cancelation. (ii) At such time as all beneficial interests in Global Preferred Stock have either been exchanged for Certificated Preferred Stock, converted, repurchased or canceled, such Global Preferred Stock shall thereupon be delivered to the Transfer Agent for cancelation.

38 (iii) The Transfer Agent and no one else shall cancel and destroy all Preferred Stock certificates surrendered for transfer, exchange, replacement or cancelation and deliver a certificate of such destruction to the Company unless the Company directs the Transfer Agent to deliver canceled Preferred Stock certificates to the Company. The Company may not issue new Preferred Stock certificates to replace Preferred Stock certificates to the extent they evidence Preferred Stock which the Company has purchased or otherwise acquired. 12. Additional Rights of Holders. In addition to the rights provided to Holders under this Certificate of Designation, Holders shall have the rights set forth in the Registration Rights Agreement. 13. Other Provisions. (a) With respect to any notice to a holder of shares of Preferred Stock required to be provided hereunder, neither failure to mail such notice, nor any defect therein or in the mailing thereof, to any particular holder shall affect the sufficiency of the notice or the validity of the proceedings referred to in such notice with respect to the other holders or affect the legality or validity of any distribution, rights, warrant, reclassification, consolidation, merger, conveyance, transfer, dissolution, liquidation or winding-up, or the vote upon any such action. Any notice which was mailed in the manner herein provided shall be conclusively presumed to have been duly given whether or not the holder receives the notice. (b) Shares of Preferred Stock issued and reacquired will be retired and canceled promptly after reacquisition thereof and, upon compliance with the applicable requirements of Oklahoma law, have the status of authorized but unissued shares of preferred stock of the Company undesignated as to series and may with any and all other authorized but unissued shares of preferred stock of the Company be designated or redesignated and issued or reissued, as the case may be, as part of any series of preferred stock of the Corporation, except that any issuance or reissuance of shares of Preferred Stock must be in compliance with this Certificate of Designation. (c) The shares of Preferred Stock shall be issuable only in whole shares.

39 (d) All notice periods referred to herein shall commence on the date of the mailing of the applicable notice. IN WITNESS WHEREOF, the Company has caused this certificate to be signed and attested this 13th day of November, 2001. CHESAPEAKE ENERGY CORPORATION By: /s/ AUBREY K. McCLENDON --------------------------- Attest: /s/ JENNIFER M. GRIGSBY - ----------------------------

EXHIBIT A FORM OF PREFERRED STOCK FACE OF SECURITY [THE SECURITY EVIDENCED HEREBY (OR ITS PREDECESSOR) (AND THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE) WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933 (THE "SECURITIES ACT") AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH PURCHASER OF THE SECURITY EVIDENCED HEREBY (OR THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE) IS HEREBY NOTIFIED THAT THE SELLER MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER. THE HOLDER OF THE SECURITY EVIDENCED HEREBY (AND OF THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE) AGREES FOR THE BENEFIT OF THE COMPANY THAT (A) SUCH SECURITY (AND THE COMMON STOCK INTO WHICH THIS SECURITY IS CONVERTIBLE) MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1) TO A PERSON WHO THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (2) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE), (3) TO THE COMPANY OR (4) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (1) THROUGH (4) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.](2) [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OF PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO - ----------------------- (2) Subject to removal upon registration under the Securities Act of 1933 or otherwise when the security shall no longer be a Transfer Restricted Security.

2 CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC) ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO. HAS AN INTEREST HEREIN.](3) [TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE CERTIFICATE OF DESIGNATION REFERRED TO BELOW.](3) IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS. Certificate Number Number of Shares of Convertible Preferred Stock [ ] [ ] CUSIP NO.: 165167404 6.75% Cumulative Convertible Preferred Stock (par value $0.01) (liquidation preference $50 per share of Convertible Preferred Stock) of Chesapeake Energy Corporation Chesapeake Energy Corporation, an Oklahoma corporation (the "Company"), hereby certifies that [ ] (the "Holder") is the registered owner of [ ] fully paid and non-assessable preferred securities of the Company designated the 6.75% Cumulative Convertible Preferred Stock (par value $0.01) (liquidation preference $50 per share of Preferred Stock) (the "Preferred Stock"). The shares of Preferred Stock are transferable on the books and records of the Transfer Agent, in person or by a duly authorized - ------------------------- (3) Subject to removal if not a global security.

3 attorney, upon surrender of this certificate duly endorsed and in proper form for transfer. The designations, rights, privileges, restrictions, preferences and other terms and provisions of the Preferred Stock represented hereby are issued and shall in all respects be subject to the provisions of the Certificate of Designation dated November 13, 2001, as the same may be amended from time to time (the "Certificate of Designation"). Capitalized terms used herein but not defined shall have the meaning given them in the Certificate of Designation. The Company will provide a copy of the Certificate of Designation to a Holder without charge upon written request to the Company at its principal place of business. Reference is hereby made to select provisions of the Preferred Stock set forth on the reverse hereof, and to the Certificate of Designation, which select provisions and the Certificate of Designation shall for all purposes have the same effect as if set forth at this place. Upon receipt of this certificate, the Holder is bound by the Certificate of Designation and is entitled to the benefits thereunder. Unless the Transfer Agent's Certificate of Authentication hereon has been properly executed, these shares of Preferred Stock shall not be entitled to any benefit under the Certificate of Designation or be valid or obligatory for any purpose. IN WITNESS WHEREOF, the Company has executed this certificate this [ ] day of [ ], [ ]. CHESAPEAKE ENERGY CORPORATION By: --------------------------- Name: Title:

4 TRANSFER AGENT'S CERTIFICATE OF AUTHENTICATION These are shares of the Preferred Stock referred to in the within-mentioned Certificate of Designation. Dated: November 13, 2001 UMB BANK, N.A., as Transfer Agent, By: ----------------------------------- Authorized Signatory

5 REVERSE OF SECURITY Cash dividends on each share of Preferred Stock shall be payable at a rate per annum set forth in the face hereof or as provided in the Certificate of Designation. The shares of Preferred Stock shall be convertible into the Company's Common Stock in the manner and according to the terms set forth in the Certificate of Designation. The Company will furnish without charge to each holder who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of stock and the qualifications, limitations or restrictions of such preferences and/or rights.

6 ASSIGNMENT FOR VALUE RECEIVED, the undersigned assigns and transfers the shares of Preferred Stock evidenced hereby to: - --------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- (Insert assignee's social security or tax identification number) - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- (Insert address and zip code of assignee) and irrevocably appoints: - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- agent to transfer the shares of Preferred Stock evidenced hereby on the books of the Transfer Agent. The agent may substitute another to act for him or her.

7 Date: ------------------------------- Signature: ------------------------------------------- (Sign exactly as your name appears on the other side of this Preferred Stock Certificate) Signature Guarantee:(4) --------------------------------------------------------- - ---------------------- (4) (Signature must be guaranteed by an "eligible guarantor institution" that is a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Transfer Agent, which requirements include membership or participation in the Securities Transfer Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Transfer Agent in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

EXHIBIT B NOTICE OF CONVERSION (To be Executed by the Holder in order to Convert the Preferred Stock) The undersigned hereby irrevocably elects to convert (the "Conversion") shares of 6.75% Cumulative Convertible Preferred Stock (the "Preferred Stock"), represented by stock certificate No(s). ________________ (the "Preferred Stock Certificates") into shares of common stock ("Common Stock") of Chesapeake Energy Corporation (the "Company") according to the conditions of the Certificate of Designation of the Preferred Stock (the "Certificate of Designation"), as of the date written below. If shares are to be issued in the name of a person other than the undersigned, the undersigned will pay all transfer taxes payable with respect thereto and is delivering herewith the Preferred Stock Certificates. No fee will be charged to the holder for any conversion, except for transfer taxes, if any. A copy of each Preferred Stock Certificate is attached hereto (or evidence of loss, theft or destruction thereof). The undersigned represents and warrants that all offers and sales by the undersigned of the shares of Common Stock issuable to the undersigned upon conversion of the Preferred Stock shall be made pursuant to registration of the Common Stock under the Securities Act of 1933 (the "Act"), or pursuant to any exemption from registration under the Act. Any holder, upon the exercise of its conversion rights in accordance with the terms of the Certificate of Designation and the Preferred Stock, agrees to be bound by the terms of the Registration Rights Agreement. Capitalized terms used but not defined herein shall have the meanings ascribed thereto in or pursuant to the Certificate of Designation. Date of Conversion: ------------------------ Applicable Conversion Price: --------------- Number of shares of Preferred Stock to be Converted: ------------ Number of shares of Common Stock to be Issued: -----------------

2 Signature: --------------------------------- Name: -------------------------------------- Address:** --------------------------------- Fax No.: ----------------------------------- * The Company is not required to issue shares of Common Stock until the original Preferred Stock Certificate(s) (or evidence of loss, theft or destruction thereof) to be converted are received by the Company or its Transfer Agent. The Company shall issue and deliver shares of Common Stock to an overnight courier not later than three business days following receipt of the original Preferred Stock Certificate(s) to be converted. ** Address where shares of Common Stock and any other payments or certificates shall be sent by the Company.

EXHIBIT C CERTIFICATE TO BE DELIVERED UPON EXCHANGE OR REGISTRATION OF TRANSFER OF PREFERRED STOCK Re: 6.75% Cumulative Convertible Preferred Stock (the "Preferred Stock") of Chesapeake Energy Corporation (the "Company") This Certificate relates to ____ shares of Preferred Stock held in [ ] */ book-entry or [ ] */ definitive form by _______________ (the "Transferor"). The Transferor*: [ ] has requested the Transfer Agent by written order to deliver in exchange for its beneficial interest in the Preferred Stock held by the depository shares of Preferred Stock in definitive, registered form equal to its beneficial interest in such Preferred Stock (or the portion thereof indicated above); or [ ] has requested the Transfer Agent by written order to exchange or register the transfer of Preferred Stock. In connection with such request and in respect of such Preferred Stock, the Transferor does hereby certify that the Transferor is familiar with the Certificate of Designation relating to the above-captioned Preferred Stock and that the transfer of this Preferred Stock does not require registration under the Securities Act of 1933 (the "Securities Act") because */: [ ] Such Preferred Stock is being acquired for the Transferor's own account without transfer. [ ] Such Preferred Stock is being transferred to the Company. [ ] Such Preferred Stock is being transferred to a qualified institutional buyer (as defined in Rule 144A under the Securities Act), in reliance on Rule 144A. [ ] Such Preferred Stock is being transferred in reliance on and in compliance with another exemption from - ----------------------- */ Please check applicable box.

2 the registration requirements of the Securities Act (and based on an Opinion of Counsel if the Company so requests). ----------------------------------- [INSERT NAME OF TRANSFEROR] by ----------------------------- Date: ------------

EXHIBIT 4.1.1 ================================================================================ CHESAPEAKE ENERGY CORPORATION and the Subsidiary Guarantors named herein ---------------------------------------- 7.875% SENIOR NOTES DUE 2004 ---------------------------------------- ------------------- NINTH SUPPLEMENTAL INDENTURE DATED AS OF December 17, 2001 ------------------- THE BANK OF NEW YORK as successor Trustee to United States Trust Company of New York ------------------- ================================================================================

THIS NINTH SUPPLEMENTAL INDENTURE, dated as of December 17, 2001, is among Chesapeake Energy Corporation, an Oklahoma corporation (the "Company"), each of the parties identified under the caption "Subsidiary Guarantors" on the signature page hereto (the "Subsidiary Guarantors") and The Bank of New York, as successor to United States Trust Company of New York, as Trustee. RECITALS WHEREAS, the Company, the Subsidiary Guarantors a party thereto and the Trustee entered into an Indenture, dated as of March 15, 1997, as supplemented prior to the date hereof (the "Indenture"), pursuant to which the Company has originally issued $150,000,000 in principal amount of 7.875% Senior Notes due 2004 (the "Notes"); and WHEREAS, Section 9.1(3) of the Indenture provides that the Company, the Subsidiary Guarantors and the Trustee may amend or supplement the Indenture without notice to or consent of any Holder to reflect the addition or release of any Subsidiary Guarantor, as provided for in the Indenture; and WHEREAS, the Board of Directors of the Company has designated Carmen Acquisition Corp. and Sap Acquisition Corp. as Restricted Subsidiaries of the Company and to add such entities as Subsidiary Guarantors under the Indenture; and WHEREAS, all acts and things prescribed by the Indenture, by law and by the charter and the bylaws (or comparable constituent documents) of the Company, of the Subsidiary Guarantors and of the Trustee necessary to make this Ninth Supplemental Indenture a valid instrument legally binding on the Company, the Subsidiary Guarantors and the Trustee, in accordance with its terms, have been duly done and performed; NOW, THEREFORE, to comply with the provisions of the Indenture and in consideration of the above premises, the Company, the Subsidiary Guarantors and the Trustee covenant and agree for the equal and proportionate benefit of the respective Holders of the Notes as follows: ARTICLE 1 Section 1.01. This Ninth Supplemental Indenture is supplemental to the Indenture and does and shall be deemed to form a part of, and shall be construed in connection with and as part of, the Indenture for any and all purposes. Section 1.02. This Ninth Supplemental Indenture shall become effective immediately upon its execution and delivery by each of the Company, the Subsidiary Guarantors and the Trustee. ARTICLE 2 From this date, in accordance with Section 10.3 and by executing this Ninth Supplemental Indenture, Carmen Acquisition Corp., an NINTH SUPPLEMENTAL INDENTURE (7_%) -2-

Oklahoma corporation, and Sap Acquisition Corp., an Oklahoma corporation, are subject to the provisions of the Indenture as Subsidiary Guarantors to the extent provided for in Article X thereunder. ARTICLE 3 Section 3.01. As a result of the merger of Arkoma Pittsburg Holding Corporation, an Oklahoma corporation ("APHC"), with and into Chesapeake Exploration Limited Partnership, an Oklahoma limited partnership ("CELP"), which constitutes a merger with a Subsidiary Guarantor under Section 10.2(a) of the Indenture, APHC shall for all purposes be released as a Subsidiary Guarantor from all of its Guarantee and related obligations in the Indenture, pursuant to Section 10.4(b) of the Indenture. The notation on the Securities relating to the Guarantee shall be deemed to exclude the name of APHC and the signature of an Officer of APHC on its behalf. Section 3.02. As the surviving entity in its merger with APHC and as a Subsidiary Guarantor, CELP hereby agrees to assume all of the obligations of APHC. ARTICLE 4 Section 4.01. Except as specifically modified herein, the Indenture and the Notes are in all respects ratified and confirmed (mutatis mutandis) and shall remain in full force and effect in accordance with their terms with all capitalized terms used herein without definition having the same respective meanings ascribed to them as in the Indenture. Section 4.02. Except as otherwise expressly provided herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed, by the Trustee by reason of this Ninth Supplemental Indenture. This Ninth Supplemental Indenture is executed and accepted by the Trustee subject to all the terms and conditions set forth in the Indenture with the same force and effect as if those terms and conditions were repeated at length herein and made applicable to the Trustee with respect hereto. Section 4.03. The Company hereby notifies the Trustee that Carmen Acquisition Corp. and Sap Acquisition Corp. have each been designated by the Board of Directors of the Company as a Restricted Subsidiary (as that term is defined in the Indenture). Section 4.04. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE AND ENFORCE THIS NINTH SUPPLEMENTAL INDENTURE. Section 4.05. The parties may sign any number of copies of this Ninth Supplemental Indenture. Each signed copy shall be an original, but all of such executed copies together shall represent the same agreement. [NEXT PAGE IS SIGNATURE PAGE] NINTH SUPPLEMENTAL INDENTURE (7_%) -3-

IN WITNESS WHEREOF, the parties hereto have caused this Ninth Supplemental Indenture to be duly executed, all as of the date first written above. COMPANY: CHESAPEAKE ENERGY CORPORATION By /s/ AUBREY K. MCCLENDON --------------------------------------- Name: Aubrey K. McClendon -------------------------------- Title: Chief Executive Officer -------------------------------- SUBSIDIARY GUARANTORS: CARMEN ACQUISITION CORP. CHESAPEAKE ACQUISITION CORPORATION CHESAPEAKE ENERGY LOUISIANA CORPORATION CHESAPEAKE MOUNTAIN FRONT CORP. CHESAPEAKE OPERATING, INC. CHESAPEAKE ROYALTY COMPANY GOTHIC ENERGY CORPORATION GOTHIC PRODUCTION CORPORATION NOMAC DRILLING CORPORATION SAP ACQUISITION CORP. THE AMES COMPANY, INC. By /s/ AUBREY K. MCCLENDON --------------------------------------- Name: Aubrey K. McClendon -------------------------------- Title: Chief Executive Officer -------------------------------- NINTH SUPPLEMENTAL INDENTURE (7_%) -4-

CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP CHESAPEAKE LOUISIANA, L.P. CHESAPEAKE PANHANDLE LIMITED PARTNERSHIP CHESAPEAKE-STAGHORN ACQUISITION L.P. By: Chesapeake Operating, Inc. as general partner of each representative entity By /s/ AUBREY K. MCCLENDON ------------------------------------ Name: Aubrey K. McClendon ----------------------------- Title: Chief Executive Officer ----------------------------- TRUSTEE: THE BANK OF NEW YORK, as successor to United States Trust Company of New York, as Trustee By /s/ LOUIS P. YOUNG --------------------------------------- Name: Louis P. Young -------------------------------- Title: Vice President -------------------------------- NINTH SUPPLEMENTAL INDENTURE (7_%) -5-

EXHIBIT 4.2.1 ================================================================================ CHESAPEAKE ENERGY CORPORATION and the Subsidiary Guarantors named herein ---------------------------------------- 8 1/2% SENIOR NOTES DUE 2012 ---------------------------------------- ------------------- NINTH SUPPLEMENTAL INDENTURE DATED AS OF December 17, 2001 ------------------- THE BANK OF NEW YORK as successor Trustee to United States Trust Company of New York ------------------- ================================================================================

THIS NINTH SUPPLEMENTAL INDENTURE, dated as of December 17, 2001, is among Chesapeake Energy Corporation, an Oklahoma corporation (the "Company"), each of the parties identified under the caption "Subsidiary Guarantors" on the signature page hereto (the "Subsidiary Guarantors") and The Bank of New York, as successor to United States Trust Company of New York, as Trustee. RECITALS WHEREAS, the Company, the Subsidiary Guarantors a party thereto and the Trustee entered into an Indenture, dated as of March 15, 1997, as supplemented prior to the date hereof (the "Indenture"), pursuant to which the Company has originally issued $150,000,000 in principal amount of 8 1/2% Senior Notes due 2012 (the "Notes"); and WHEREAS, Section 9.1(3) of the Indenture provides that the Company, the Subsidiary Guarantors and the Trustee may amend or supplement the Indenture without notice to or consent of any Holder to reflect the addition or release of any Subsidiary Guarantor, as provided for in the Indenture; and WHEREAS, the Board of Directors of the Company has designated Carmen Acquisition Corp. and Sap Acquisition Corp. as Restricted Subsidiaries of the Company and to add such entities as Subsidiary Guarantors under the Indenture; and WHEREAS, all acts and things prescribed by the Indenture, by law and by the charter and the bylaws (or comparable constituent documents) of the Company, of the Subsidiary Guarantors and of the Trustee necessary to make this Ninth Supplemental Indenture a valid instrument legally binding on the Company, the Subsidiary Guarantors and the Trustee, in accordance with its terms, have been duly done and performed; NOW, THEREFORE, to comply with the provisions of the Indenture and in consideration of the above premises, the Company, the Subsidiary Guarantors and the Trustee covenant and agree for the equal and proportionate benefit of the respective Holders of the Notes as follows: ARTICLE 1 Section 1.01. This Ninth Supplemental Indenture is supplemental to the Indenture and does and shall be deemed to form a part of, and shall be construed in connection with and as part of, the Indenture for any and all purposes. Section 1.02. This Ninth Supplemental Indenture shall become effective immediately upon its execution and delivery by each of the Company, the Subsidiary Guarantors and the Trustee. ARTICLE 2 From this date, in accordance with Section 10.3 and by executing this Ninth Supplemental Indenture, Carmen Acquisition Corp., an Oklahoma corporation, is subject to the provisions of the Indenture as a Subsidiary Guarantor to the extent provided for in Article X thereunder. NINTH SUPPLEMENTAL INDENTURE (8 1/2%) -2-

ARTICLE 3 Section 3.01. As a result of the merger of Arkoma Pittsburg Holding Corporation, an Oklahoma corporation ("APHC"), with and into Chesapeake Exploration Limited Partnership, an Oklahoma limited partnership ("CELP"), which constitutes a merger with a Subsidiary Guarantor under Section 10.2(a) of the Indenture, APHC shall for all purposes be released as a Subsidiary Guarantor from all of its Guarantee and related obligations in the Indenture, pursuant to Section 10.4(b) of the Indenture. The notation on the Securities relating to the Guarantee shall be deemed to exclude the name of APHC and the signature of an Officer of APHC on its behalf. Section 3.02. As the surviving entity in its merger with APHC and as a Subsidiary Guarantor, CELP hereby agrees to assume all of the obligations of APHC. ARTICLE 4 Section 4.01. Except as specifically modified herein, the Indenture and the Notes are in all respects ratified and confirmed (mutatis mutandis) and shall remain in full force and effect in accordance with their terms with all capitalized terms used herein without definition having the same respective meanings ascribed to them as in the Indenture. Section 4.02. Except as otherwise expressly provided herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed, by the Trustee by reason of this Ninth Supplemental Indenture. This Ninth Supplemental Indenture is executed and accepted by the Trustee subject to all the terms and conditions set forth in the Indenture with the same force and effect as if those terms and conditions were repeated at length herein and made applicable to the Trustee with respect hereto. Section 4.03. The Company hereby notifies the Trustee that Carmen Acquisition Corp. and Sap Acquisition Corp have each been designated by the Board of Directors of the Company as a Restricted Subsidiary (as that term is defined in the Indenture). Section 4.04. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE AND ENFORCE THIS NINTH SUPPLEMENTAL INDENTURE. Section 4.05. The parties may sign any number of copies of this Ninth Supplemental Indenture. Each signed copy shall be an original, but all of such executed copies together shall represent the same agreement. [NEXT PAGE IS SIGNATURE PAGE] NINTH SUPPLEMENTAL INDENTURE (8 1/2%) -3-

IN WITNESS WHEREOF, the parties hereto have caused this Ninth Supplemental Indenture to be duly executed, all as of the date first written above. COMPANY: CHESAPEAKE ENERGY CORPORATION By /s/ AUBREY K. MCCLENDON ------------------------------------------ Name: Aubrey K. McClendon ----------------------------------- Title: Chief Executive Officer ----------------------------------- SUBSIDIARY GUARANTORS: CARMEN ACQUISITION CORP. CHESAPEAKE ACQUISITION CORPORATION CHESAPEAKE ENERGY LOUISIANA CORPORATION CHESAPEAKE MOUNTAIN FRONT CORP. CHESAPEAKE OPERATING, INC. CHESAPEAKE ROYALTY COMPANY GOTHIC ENERGY CORPORATION GOTHIC PRODUCTION CORPORATION NOMAC DRILLING CORPORATION SAP ACQUISITION CORP. THE AMES COMPANY, INC. By /s/ AUBREY K. MCCLENDON ------------------------------------------ Name: Aubrey K. McClendon ----------------------------------- Title: Chief Executive Officer ----------------------------------- NINTH SUPPLEMENTAL INDENTURE (8 1/2%) -4-

CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP CHESAPEAKE LOUISIANA, L.P. CHESAPEAKE PANHANDLE LIMITED PARTNERSHIP CHESAPEAKE-STAGHORN ACQUISITION L.P. By: Chesapeake Operating, Inc. as general partner of each representative entity By /s/ AUBREY K. MCCLENDON ------------------------------------ Name: Aubrey K. McClendon ----------------------------- Title: Chief Executive Officer ----------------------------- TRUSTEE: THE BANK OF NEW YORK, as successor to United States Trust Company of New York, as Trustee By /s/ LOUIS P. YOUNG ------------------------------------------ Name: Louis P. Young ----------------------------------- Title: Vice President ----------------------------------- NINTH SUPPLEMENTAL INDENTURE (8 1/2%) -5-

EXHIBIT 4.3.1 ================================================================================ CHESAPEAKE ENERGY CORPORATION and the Subsidiary Guarantors named herein ---------------------------------------- 8.125% SENIOR NOTES DUE 2011 ---------------------------------------- ------------------- FOURTH SUPPLEMENTAL INDENTURE DATED AS OF December 17, 2001 ------------------- THE BANK OF NEW YORK as successor Trustee to United States Trust Company of New York ------------------- ================================================================================

THIS FOURTH SUPPLEMENTAL INDENTURE, dated as of December 17, 2001, is among Chesapeake Energy Corporation, an Oklahoma corporation (the "Company"), each of the parties identified under the caption "Subsidiary Guarantors" on the signature page hereto (the "Subsidiary Guarantors") and The Bank of New York, as successor to United States Trust Company of New York, as Trustee. RECITALS WHEREAS, the Company, the Subsidiary Guarantors a party thereto and the Trustee entered into an Indenture, dated as of April 6, 2001, as supplemented prior to the date hereof (the "Indenture"), pursuant to which the Company has originally issued $800,000,000 in principal amount of 8.125% Senior Notes due 2011 (the "Notes"); and WHEREAS, Section 9.01(3) of the Indenture provides that the Company, the Subsidiary Guarantors and the Trustee may amend or supplement the Indenture without notice to or consent of any Holder to reflect the addition or release of any Subsidiary Guarantor, as provided for in the Indenture; and WHEREAS, the Board of Directors of the Company has designated Carmen Acquisition Corp. and Sap Acquisition Corp. as Restricted Subsidiaries of the Company and to add such entities as Subsidiary Guarantors under the Indenture; and WHEREAS, all acts and things prescribed by the Indenture, by law and by the charter and the bylaws (or comparable constituent documents) of the Company, of the Subsidiary Guarantors and of the Trustee necessary to make this Fourth Supplemental Indenture a valid instrument legally binding on the Company, the Subsidiary Guarantors and the Trustee, in accordance with its terms, have been duly done and performed; NOW, THEREFORE, to comply with the provisions of the Indenture and in consideration of the above premises, the Company, the Subsidiary Guarantors and the Trustee covenant and agree for the equal and proportionate benefit of the respective Holders of the Notes as follows: ARTICLE 1 Section 1.01. This Fourth Supplemental Indenture is supplemental to the Indenture and does and shall be deemed to form a part of, and shall be construed in connection with and as part of, the Indenture for any and all purposes. Section 1.02. This Fourth Supplemental Indenture shall become effective immediately upon its execution and delivery by each of the Company, the Subsidiary Guarantors and the Trustee. ARTICLE 2 From this date, in accordance with Section 10.03 and by executing this Fourth Supplemental Indenture, Carmen Acquisition Corp., an Oklahoma corporation, and Sap Acquisition Corp., an FOURTH SUPPLEMENTAL INDENTURE (8_%) -2-

Oklahoma corporation, are subject to the provisions of the Indenture as Subsidiary Guarantors to the extent provided for in Article Ten thereunder. ARTICLE 3 Section 3.01. As a result of the merger of Arkoma Pittsburg Holding Corporation, an Oklahoma corporation ("APHC"), with and into Chesapeake Exploration Limited Partnership, an Oklahoma limited partnership ("CELP"), which constitutes a merger with a Subsidiary Guarantor under Section 10.02(a) of the Indenture, APHC shall for all purposes be released as a Subsidiary Guarantor from all of its Guarantee and related obligations in the Indenture, pursuant to Section 10.04 of the Indenture. The notation on the Securities relating to the Guarantee shall be deemed to exclude the name of APHC and the signature of an Officer of APHC on its behalf. Section 3.02. As the surviving entity in its merger with APHC and as a Subsidiary Guarantor, CELP hereby agrees to assume all of the obligations of APHC. ARTICLE 4 Section 4.01. Except as specifically modified herein, the Indenture and the Notes are in all respects ratified and confirmed (mutatis mutandis) and shall remain in full force and effect in accordance with their terms with all capitalized terms used herein without definition having the same respective meanings ascribed to them as in the Indenture. Section 4.02. Except as otherwise expressly provided herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed, by the Trustee by reason of this Fourth Supplemental Indenture. This Fourth Supplemental Indenture is executed and accepted by the Trustee subject to all the terms and conditions set forth in the Indenture with the same force and effect as if those terms and conditions were repeated at length herein and made applicable to the Trustee with respect hereto. Section 4.03. The Company hereby notifies the Trustee that Carmen Acquisition Corp. and Sap Acquisition Corp. have each been designated by the Board of Directors of the Company as a Restricted Subsidiary (as that term is defined in the Indenture). Section 4.04. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE AND ENFORCE THIS FOURTH SUPPLEMENTAL INDENTURE. Section 4.05. The parties may sign any number of copies of this Fourth Supplemental Indenture. Each signed copy shall be an original, but all of such executed copies together shall represent the same agreement. [NEXT PAGE IS SIGNATURE PAGE] FOURTH SUPPLEMENTAL INDENTURE (8_%) -3-

IN WITNESS WHEREOF, the parties hereto have caused this Fourth Supplemental Indenture to be duly executed, all as of the date first written above. COMPANY: CHESAPEAKE ENERGY CORPORATION By /s/ AUBREY K. MCCLENDON ------------------------------------------ Name: Aubrey K. McClendon ----------------------------------- Title: Chief Executive Officer ----------------------------------- SUBSIDIARY GUARANTORS: CARMEN ACQUISITION CORP. CHESAPEAKE ACQUISITION CORPORATION CHESAPEAKE ENERGY LOUISIANA CORPORATION CHESAPEAKE MOUNTAIN FRONT CORP. CHESAPEAKE OPERATING, INC. CHESAPEAKE ROYALTY COMPANY GOTHIC ENERGY CORPORATION GOTHIC PRODUCTION CORPORATION NOMAC DRILLING CORPORATION SAP ACQUISITION CORP. THE AMES COMPANY, INC. By /s/ AUBREY K. MCCLENDON ------------------------------------------ Name: Aubrey K. McClendon ----------------------------------- Title: Chief Executive Officer ----------------------------------- FOURTH SUPPLEMENTAL INDENTURE (8_%) -4-

CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP CHESAPEAKE LOUISIANA, L.P. CHESAPEAKE PANHANDLE LIMITED PARTNERSHIP CHESAPEAKE-STAGHORN ACQUISITION L.P. By: Chesapeake Operating, Inc. as general partner of each representative entity By /s/ AUBREY K. MCCLENDON -------------------------------------- Name: Aubrey K. McClendon ------------------------------- Title: Chief Executive Officer ------------------------------- TRUSTEE: THE BANK OF NEW YORK, as successor to United States Trust Company of New York, as Trustee By /s/ LOUIS P. YOUNG ------------------------------------------ Name: Louis P. Young ----------------------------------- Title: Vice President ----------------------------------- FOURTH SUPPLEMENTAL INDENTURE (8_%) -5-

EXHIBIT 4.16.1 =============================================================================== CHESAPEAKE ENERGY CORPORATION and the Subsidiary Guarantors named herein ---------------------------------------- 8.375% SENIOR NOTES DUE 2008 ---------------------------------------- ------------------- FIRST SUPPLEMENTAL INDENTURE DATED AS OF December 17, 2001 ------------------- THE BANK OF NEW YORK as Trustee ------------------- ===============================================================================

THIS FIRST SUPPLEMENTAL INDENTURE, dated as of December 17, 2001, is among Chesapeake Energy Corporation, an Oklahoma corporation (the "Company"), each of the parties identified under the caption "Subsidiary Guarantors" on the signature page hereto (the "Subsidiary Guarantors") and The Bank of New York, as Trustee. RECITALS WHEREAS, the Company, the Subsidiary Guarantors a party thereto and the Trustee entered into an Indenture, dated as of November 5, 2001 (the "Indenture"), pursuant to which the Company has originally issued $250,000,000 in principal amount of 8.375% Senior Notes due 2008 (the "Notes"); and WHEREAS, Section 9.01(3) of the Indenture provides that the Company, the Subsidiary Guarantors and the Trustee may amend or supplement the Indenture without notice to or consent of any Holder to reflect the addition or release of any Subsidiary Guarantor, as provided for in the Indenture; and WHEREAS, the Board of Directors of the Company has designated Carmen Acquisition Corp. as a Restricted Subsidiary of the Company and to add such entity as a Subsidiary Guarantor under the Indenture; and WHEREAS, all acts and things prescribed by the Indenture, by law and by the charter and the bylaws (or comparable constituent documents) of the Company, of the Subsidiary Guarantors and of the Trustee necessary to make this First Supplemental Indenture a valid instrument legally binding on the Company, the Subsidiary Guarantors and the Trustee, in accordance with its terms, have been duly done and performed; NOW, THEREFORE, to comply with the provisions of the Indenture and in consideration of the above premises, the Company, the Subsidiary Guarantors and the Trustee covenant and agree for the equal and proportionate benefit of the respective Holders of the Notes as follows: ARTICLE 1 Section 1.01. This First Supplemental Indenture is supplemental to the Indenture and does and shall be deemed to form a part of, and shall be construed in connection with and as part of, the Indenture for any and all purposes. Section 1.02. This First Supplemental Indenture shall become effective immediately upon its execution and delivery by each of the Company, the Subsidiary Guarantors and the Trustee. ARTICLE 2 From this date, in accordance with Section 10.03 and by executing this First Supplemental Indenture, Carmen Acquisition Corp., an Oklahoma corporation, is subject to the provisions of the Indenture as a Subsidiary Guarantor to the extent provided for in Article Ten thereunder. FIRST SUPPLEMENTAL INDENTURE (8.375%) -2-

ARTICLE 3 Section 3.01. As a result of the merger of Arkoma Pittsburg Holding Corporation, an Oklahoma corporation ("APHC"), with and into Chesapeake Exploration Limited Partnership, an Oklahoma limited partnership ("CELP"), which constitutes a merger with a Subsidiary Guarantor under Section 10.02(a) of the Indenture, APHC shall for all purposes be released as a Subsidiary Guarantor from all of its Guarantee and related obligations in the Indenture, pursuant to Section 10.04 of the Indenture. The notation on the Securities relating to the Guarantee shall be deemed to exclude the name of APHC and the signature of an Officer of APHC on its behalf. Section 3.02. As the surviving entity in its merger with APHC and as a Subsidiary Guarantor, CELP hereby agrees to assume all of the obligations of APHC. ARTICLE 4 Section 4.01. Except as specifically modified herein, the Indenture and the Notes are in all respects ratified and confirmed (mutatis mutandis) and shall remain in full force and effect in accordance with their terms with all capitalized terms used herein without definition having the same respective meanings ascribed to them as in the Indenture. Section 4.02. Except as otherwise expressly provided herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed, by the Trustee by reason of this First Supplemental Indenture. This First Supplemental Indenture is executed and accepted by the Trustee subject to all the terms and conditions set forth in the Indenture with the same force and effect as if those terms and conditions were repeated at length herein and made applicable to the Trustee with respect hereto. Section 4.03. The Company hereby notifies the Trustee that Carmen Acquisition Corp. has been designated by the Board of Directors of the Company as a Restricted Subsidiary (as that term is defined in the Indenture). Section 4.04. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE AND ENFORCE THIS FIRST SUPPLEMENTAL INDENTURE. Section 4.05. The parties may sign any number of copies of this First Supplemental Indenture. Each signed copy shall be an original, but all of such executed copies together shall represent the same agreement. [NEXT PAGE IS SIGNATURE PAGE] FIRST SUPPLEMENTAL INDENTURE (8.375%) -3-

IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental Indenture to be duly executed, all as of the date first written above. COMPANY: CHESAPEAKE ENERGY CORPORATION By /s/ AUBREY K. MCCLENDON ----------------------------------------- Name: Aubrey K. McClendon ---------------------------------- Title: Chief Executive Officer ---------------------------------- SUBSIDIARY GUARANTORS: CARMEN ACQUISITION CORP. CHESAPEAKE ACQUISITION CORPORATION CHESAPEAKE ENERGY LOUISIANA CORPORATION CHESAPEAKE MOUNTAIN FRONT CORP. CHESAPEAKE OPERATING, INC. CHESAPEAKE ROYALTY COMPANY GOTHIC ENERGY CORPORATION GOTHIC PRODUCTION CORPORATION NOMAC DRILLING CORPORATION SAP ACQUISITION CORP. THE AMES COMPANY, INC. By /s/ AUBREY K. MCCLENDON ----------------------------------------- Name: Aubrey K. McClendon ---------------------------------- Title: Chief Executive Officer ---------------------------------- FIRST SUPPLEMENTAL INDENTURE (8.375%) -4-

CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP CHESAPEAKE LOUISIANA, L.P. CHESAPEAKE PANHANDLE LIMITED PARTNERSHIP CHESAPEAKE-STAGHORN ACQUISITION L.P. By: Chesapeake Operating, Inc. as general partner of each representative entity By /s/ AUBREY K. MCCLENDON ----------------------------------- Name: Aubrey K. McClendon ----------------------------- Title: Chief Executive Officer ----------------------------- TRUSTEE: THE BANK OF NEW YORK, as Trustee By /s/ LOUIS P. YOUNG ---------------------------------------- Name: Louis P. Young ---------------------------------- Title: Vice President ---------------------------------- FIRST SUPPLEMENTAL INDENTURE (8.375%) -5-

EXHIBIT 5.1 [Letterhead of Commercial Law Group, P.C.] January 10, 2002 Chesapeake Energy Corporation 6100 North Western Avenue Oklahoma City, Oklahoma 73118 Re: Chesapeake Energy Corporation; Our File No. 3520-0076 Ladies and Gentlemen: We have acted as special Oklahoma counsel for Chesapeake Energy Corporation, an Oklahoma corporation (the "Company") and certain of its subsidiaries with respect to the preparation of the Registration Statement on Form S-3 (the "Registration Statement") filed with the Securities and Exchange Commission (the "Commission") in connection with the registration by the Company under the Securities Act of 1933, as amended (the "Securities Act") of the resale from time to time of shares of the Company's 6.75% Cumulative Convertible Preferred Stock (the "Preferred Stock") and the Company's common stock, par value $.01 per share, issuable upon conversion of the Preferred Stock. We have examined originals or copies, certified or otherwise identified to our satisfaction, of: (a) the Restated Certificate of Incorporation, as amended, and Bylaws of the Company; (b) the Certificate of Designation of the Preferred Stock; and (c) such other certificates, statutes and other instruments and documents as we considered appropriate for purposes of the opinions hereafter expressed. In connection with this opinion, we have assumed that the Registration Statement, and any amendments thereto (including post-effective amendments), will have become effective and that the Preferred Stock and the Company's common stock, par value $.01 per share, issuable upon conversion of the Preferred Stock will be sold in compliance with applicable federal and state securities laws and in the manner described in the Registration Statement. Based on the foregoing, we are of the opinion that the Preferred Stock has been and that the Company's common stock, par value $.01 per share, issuable upon conversion of the Preferred Stock, will have been validly issued by the Company under the laws of the State of Oklahoma. We are members of the bar of the State of Oklahoma. The opinions expressed herein are limited exclusively to the federal laws of the United States of America and the laws of the State of Oklahoma, and we are expressing no opinion as to the effect of the laws of any other jurisdiction, domestic or foreign. We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. By giving such consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission issued thereunder. Very truly yours, /s/ COMMERCIAL LAW GROUP, P.C. -------------------------------- Commercial Law Group, P.C.

EXHIBIT 8.1 [Letterhead of Vinson & Elkins L.L.P.] January 10, 2002 Chesapeake Energy Corporation 6100 North Western Avenue Oklahoma City, Oklahoma 73118 Ladies and Gentlemen: We have acted as counsel for Chesapeake Energy Corporation, an Oklahoma corporation (the "Company") with respect to the preparation of the Registration Statement on Form S-3 (the "Registration Statement") filed with the Securities and Exchange Commission (the "Commission") in connection with the registration by the Company under the Securities Act of 1933, as amended (the "Securities Act") of the resale from time to time of shares of the Company's 6.75% Cumulative Convertible Preferred Stock (the "Preferred Stock") and the Company's common stock, par value $.01 per share, issuable upon conversion of the Preferred Stock. In connection with this opinion, we have assumed that the Registration Statement, and any amendments thereto (including post-effective amendments), will have become effective and that the Preferred Stock and the Company's common stock, par value $.01 per share, issuable upon conversion of the Preferred Stock will be sold in compliance with applicable federal and state securities laws and in the manner described in the Registration Statement. We are of the opinion that the statements contained in the prospectus constituting a part of the Registration Statement under the caption "FEDERAL INCOME TAX CONSIDERATIONS," as qualified therein, constitute an accurate description, in general terms of the United States federal income tax laws referred to therein. We are members of the bar of the State of Texas. The opinions expressed herein are limited exclusively to the federal laws of the United States of America, and we are expressing no opinion as to the effect of the laws of any other jurisdiction, domestic or foreign. We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. By giving such consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission issued thereunder. Very truly yours, /s/ VINSON & ELKINS L.L.P. --------------------------- Vinson & Elkins L.L.P.

EXHIBIT 12 CHESAPEAKE ENERGY CORPORATION Preferred Stock Offering - 3,000,000 Shares (In 000's)

Year Year Six Months Year Year Year Nine Months Ended Ended Ended Ended Ended Ended Ended June 30, June 30, Dec. 31, Dec. 31, Dec. 31, Dec. 31, Sept. 30, 1996 1997 1997 1998 1999 2000 2001 -------- -------- ---------- -------- -------- -------- ----------- RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED DIVIDENDS Income before income taxes and extraordinary item $36,209 $(180,330) $(31,574) $(920,520) $35,030 $196,162 $369,400 Interest 13,679 18,550 17,448 68,249 81,052 86,256 72,977 Amortization of capitalized interest 234 8,771 4,386 12,240 1,047 1,226 930 Bond discount amortization (A) -- -- -- Loan cost amortization 1,288 1,455 794 2,516 3,338 3,669 2,871 -------- -------- -------- -------- -------- -------- -------- Earnings 51,410 (151,554) (8,947) (837,515) 120,467 287,313 446,178 Interest expense 13,679 18,550 17,448 68,249 81,052 86,256 72,977 Capitalized interest 6,428 12,935 5,087 6,470 3,356 2,452 3,290 Bond discount amortization (A) -- -- -- -- -- -- -- Loan cost amortization 1,288 1,455 794 2,516 3,338 3,669 2,871 Preferred dividend requirements -- -- -- 12,077 16,711 8,484 728 Ratio of income before provision for income taxes to net income (B) -- -- -- N/A 1.05 N/A 1.67 -------- -------- -------- -------- -------- -------- -------- Preferred dividends on a pretax basis -- -- -- 12,077 17,547 8,484 1,216 -------- -------- -------- -------- -------- -------- -------- Fixed Charges and Preferred Dividends $21,395 $32,940 $23,329 $89,312 $105,293 $100,861 $80,354 Ratio 2.4 1.1 2.8 5.6 Insufficient coverage N/A 184494 32275.5 926,827 N/A N/A N/A
(A) Bond discount excluded since it is included in interest expense (B) Represents income (loss) before income taxes and extraordinary item divided by income (loss) before extraordinary item, which adjusts dividends on preferred stock to a pre-tax basis Page 1

EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 of our report dated March 28, 2001 relating to the consolidated financial statements and financial statement schedule of Chesapeake Energy Corporation, which appears in Chesapeake Energy Corporation's Annual Report on Form 10-K/A for the year ended December 31, 2000. We also consent to the reference to us under the heading "Experts" in such Registration Statement. /s/ PRICEWATERHOUSECOOPERS LLP PricewaterhouseCoopers LLP Oklahoma City, Oklahoma January 9, 2002

EXHIBIT 23.2 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 26, 2001 relating to the consolidated financial statements of Gothic Energy Corporation, which appears in Chesapeake Energy Corporation's Annual Report on Form 10-K/A for the year ended December 31, 2000. We also hereby consent to the incorporation by reference in the Registration Statement on Form S-3 of Chesapeake Energy Corporation of our report dated February 21, 2000 relating to the financial statements of Gothic Energy Corporation, which is incorporated by reference in the Current Report on Form 8-K of Chesapeake Energy Corporation dated January 31, 2001 which Form 8-K is incorporated by reference in this Registration Statement on Form S-3. We also consent to the reference to us under the heading "Experts" in such Registration Statement on Form S-3. /s/ PRICEWATERHOUSECOOPERS LLP PricewaterhouseCoopers LLP Oklahoma City, Oklahoma January 9, 2002

EXHIBIT 23.3 [WILLIAMSON Petroleum Consultants, Inc. Letterhead] CONSENT OF WILLIAMSON PETROLEUM CONSULTANTS, INC. As independent oil and gas consultants, Williamson Petroleum Consultants, Inc. hereby consents to the incorporation by reference in this Registration Statement on Form S-3, to be filed with the Securities and Exchange Commission on or about January 7, 2002, of information from our reserves report dated February 20, 2001 entitled "Evaluation of Oil and Gas Reserves to the Interests of Chesapeake Energy Corporation in Certain Major-Value Properties in the United States, Effective December 31, 2000, for Disclosure to the Securities and Exchange Commission, Utilizing Aries Software, Williamson Project 0.8823" and all references to our firm included in or made a part of the Chesapeake Energy Corporation Annual Report on Form 10-K for the year ended December 31, 2000. We also consent to the reference to us under the heading "Experts" in such Registration Statement. /s/ WILLIAMSON PETROLEUM CONSULTANTS, INC. WILLIAMSON PETROLEUM CONSULTANTS, INC. Midland, Texas January 7, 2002

EXHIBIT 23.4 [RYDER SCOTT COMPANY LETTERHEAD] CONSENT OF RYDER SCOTT COMPANY, L.P. As independent oil and gas consultants, Ryder Scott Company, L.P., hereby consents to the incorporation by reference in this Registration Statement on Form S-3, to be filed with the Securities and Exchange Commission on or about January 7, 2002, of information from our reserve report dated February 2, 2001, entitled "Chesapeake Energy Corporation Estimated Future Reserves and Income Attributable to Certain Leasehold Interests" and all references to our firm included in or made a part of the Chesapeake Energy Corporation Annual Report on Form 10-K for the year ended December 31, 2000. We also consent to the reference to us under the heading "Experts" in such Registration Statement. /s/ RYDER SCOTT COMPANY, L.P. ----------------------------- RYDER SCOTT COMPANY, L.P. Houston, Texas January 8, 2002

EXHIBIT 23.5 [LEE KEELING AND ASSOCIATES, INC. LETTERHEAD] CONSENT OF LEE KEELING AND ASSOCIATES, INC. As independent oil and gas consultants, Lee Keeling and Associates, Inc. hereby consents to the incorporation by reference in this Registration Statement on Form S-3, to be filed with the Securities and Exchange Commission on or about January 7, 2002, of information from our reserve reports dated December 31, 2000 and all references to our firm included in or made a part of the Chesapeake Energy Corporation Annual Report on Form 10-K for the year ended December 31, 2000. We also consent to the reference to us under the heading "Experts" in such Registration Statement. LEE KEELING AND ASSOCIATES, INC. By: /s/ KENNETH RENBERG ------------------------------- Kenneth Renberg, Vice President Tulsa, Oklahoma January 7, 2002