Filed pursuant to Rule 424(b)(3) Registration No. 333-76546 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) PROSPECTUS SUPPLEMENT NO. 7 DATED JUNE 28, 2002 TO PROSPECTUS DATED JANUARY 30, 2002 The selling securityholders table on page 27 and 28 of the prospectus is amended by this supplement no. 7 to read as follows. Number of Number of Number of Shares of Shares of Number of Number of Shares of Preferred Number of Preferred Shares of Shares of Common Stock Stock Shares of Stock to be Common Stock Common Stock to be Owned Beneficially Preferred Owned After Beneficially Being After Owned Prior Stock Being Completion Owned Prior to Offered Completion to the Offered of the the Offering Hereby of the Name Offering Hereby Offering Offering AIG Soundshore Holdings Ltd.... 139,500 139,500 0 905,843 905,843 0 AIG Soundshore Opportunity Holding Fund Ltd............... 76,400 76,400 0 496,103 496,103 0 AIG Soundshore Strategic Holding Fund Ltd............... 46,100 46,100 0 299,350 299,350 0 Alpine Associates.............. 100,000 100,000 0 649,350 649,350 0 Alpine Partners, L.P........... 15,000 15,000 0 97,403 97,403 0 Argent Classic Convertible Arbitrage Fund (Bermuda) Ltd... 20,000 20,000 0 129,870 129,870 0 Argent LowLev Convertible Arbitrage Fund Ltd............. 40,000 40,000 0 259,740 259,740 0 Bear, Stearns & Co. Inc,....... 5,000 5,000 0 32,468 32,468 0 BGI Global Investors c/o Forest Investment Mngt. L.L.C,........ 6,200 6,200 0 40,260 40,260 0 Banc of America Securities LLC............................ 180,000 180,000 0 1,168,830 1,168,830 0 Credit Suisse First Boston Corporation.................... 128,500 128,500 0 834,415 834,415 0 CSFB Convertible and Quantitative Strategies........ 50,000 50,000 0 324,675 324,675 0 Fidelity Financial Trust: Fidelity Convertible Securities 405,000 405,000 0 2,629,868 2,629,868 0 Fund........................... First Union National Bank........................... 295,000 295,000 0 1,915,583 1,915,583 0 FIST - Franklin Convertible Securities Fund................ 40,000 40,000 0 259,740 259,740 0 Forest Alternative Strategies II 1,800 1,800 0 11,688 11,688 0 Forest Fulcrum Fund L.L.P...... 20,000 20,000 0 129,870 129,870 0 Forest Global Convertible Fund Series A-5..................... 75,600 75,600 0 490,909 490,909 0 FTIF - Franklin Income Fund.... 1,000 1,000 0 6,494 6,494 0 Franklin Custodian Fund - Income Fund.................... 270,800 270,800 0 1,758,440 1,758,440 0 FTVIPT - Franklin Income Securities Fund................ 18,000 18,000 0 116,883 116,883 0 Global Bermuda Limited Partnership.................... 4,000 4,000 0 25,974 25,974 0 HFR TQA Master Trust........... 10,000 10,000 0 64,935 64,935 Highbridge International LLC... 10,000 10,000 0 64,935 64,935 0 Jefferies & Co,................ 88,000 88,000 0 571,428 571,428 0 KBC Financial Products USA Inc. 17,500 17,500 0 113,636 113,636 0 Lakeshore International Ltd.... 16,000 16,000 0 103,896 103,896 0 LDG Limited.................... 10,000 10,000 0 64,935 64,935 0 Lipper Convertibles, L.P....... 150,000 150,000 0 974,025 974,025 0 LLT Limited.................... 6,200 6,200 0 40,260 40,260 0 Lyxor Master Fund.............. 2,000 2,000 0 12,987 12,987 0 Navigator Offshore Fund, Ltd... 15,000 15,000 0 97,403 97,403 0 Navigator Partners L.P,........ 3,000 3,000 0 19,481 19,481 0 The Northwestern Mutual Life Insurance Company.............. 30,000 30,000 0 194,805 194,805 0 Onex Industrial Partners Limited 7,250 7,250 0 47,078 47,078 0 Pebble Capital Inc............. 3,000 3,000 0 19,481 19,481 0 Peoples Benefit Life Insurance Company/TEAMSTERS.............. 17,500 17,500 0 113,636 113,636 0 Ramius Capital Group........... 10,000 10,000 0 64,935 64,935 0 RBC Capital Services Inc. c/o Forest Investment Mngt. LLC.... 1,500 1,500 0 9,740 9,740 0 RCG Halifax Master Fund Ltd.... 5,000 5,000 0 32,468 32,468 0 RCG Latitude Master Fund Ltd... 15,000 15,000 0 97,403 97,403 0 RCG Multi Strategy LP.......... 10,000 10,000 0 64,935 64,935 0 Retail Clerks Pension Trust #2. 17,500 17,500 0 113,636 113,636 0 Silvercreek Limited Partnership 5,000 5,000 0 32,468 32,468 0 Silvercreek II Limited......... 9,750 9,750 0 63,312 63,312 0 Speer, Leeds & Kellogg L.P..... 10,000 10,000 0 64,935 64,935 0 Sunrise Partners LLC........... 269,000 269,000 0 1,746,752 1,746,752 0 Sylvan (IMA) Ltd. c/o Forest Investment Mngt. L.L.C......... 7,500 7,500 0 48,701 48,701 0 TQA Master Fund, LTD........... 50,000 50,000 0 324,675 324,675 0 TQA Master Plus Fund, LTD...... 45,000 45,000 0 292,208 292,208 0 UBS O'Connoz LLC F/B/O UBS Global Equity Arbitrage Master Ltd............................ 70,000 70,000 0 454,545 454,545 0 White River Securities L.L.C... 5,000 5,000 0 32,468 32,468 0 Yield Strategies Fund I, LP.... 7,500 7,500 0 48,701 48,701 0 Yield Strategies Fund II, LP... 7,500 7,500 0 48,701 48,701 0 Zurich Institutional Benchmarks Master Fund c/o TQA Investors L.L.C.......................... 10,000 10,000 0 64,935 64,935 0 Zurich Master Hedge Fund c/o Forest Investment Mngt. L.L.C,. 6,200 6,200 0 40,260 40,260 0 Total 2,884,800 (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 Price Adjustment". 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.