Filed pursuant to Rule 424 (b) (3)
                                                    Registration No. 331-116461


                                 313,250 SHARES

                                       OF

                          CHESAPEAKE ENERGY CORPORATION

                  4.125% CUMULATIVE CONVERTIBLE PREFERRED STOCK

                    (LIQUIDATION PREFERENCE $1,000 PER SHARE)

                                       AND

                                  COMMON STOCK,

                           (PAR VALUE $.01 PER SHARE)



                           PROSPECTUS SUPPLEMENT NO. 1
                           ---------------------------
                               DATED JULY 16 2004
                        TO PROSPECTUS DATED JULY 8, 2004





         The  selling  securityholders  table  on  pages  36  through  38 of the
prospectus is amended by this supplement no. 1 to read as follows.


                                                  Number of                 Number of                               Number of
                                                  Shares of                 Shares of                               Shares of
                                                  Preferred     Number of   Preferred    Number of     Number of    Common Stock
                                                    Stock       Shares of   Stock to be  Shares of     Shares of    to be Owned
                                                 Beneficially   Preferred   Owned After  Common Stock  Common Stock    After
                                                 Owned Prior   Stock Being  Completion  Beneficially    Being        Completion
                                                   to the        Offered      of the    Owned Prior to  Offered       of the
  Name                                            Offering       Hereby      Offering     Offering*      Hereby*      Offering
  ----                                           ------------  -----------  ----------- -------------- ------------ ------------
                                                                                                     
Alexian Brother Medical Center                        350         350              0       21,019         21,019              0
Aloha Airlines Non-Pilots Pension Trust               215         215              0       12,912         12,912              0
Aloha Pilots Retirement Trust                         110         110              0        6,606          6,606              0
Argent  LowLev Convertible Arbitrage Fund LLC         780         780              0       46,843         46,843              0
Argent Classic Convertible Arbitrage Fund
 (Bermuda) Ltd.                                     3,110       3,110              0      186,773        186,773              0
Argent Classic Convertible Arbitrage Fund II, L.P.    100         100              0        6,006          6,006              0
Argent Classic Convertible Arbitrage Fund L.P.        570         570              0       34,232         34,232              0
Argent LowLev Convertible Arbitrage Fund II, L.L.C.   120         120              0        7,207          7,207              0
Argent LowLev Convertible Arbitrage Fund Ltd.       4,215       4,215              0      253,134        253,134              0
AstraZeneca Holdings Pension                          550         550              0       33,031         33,031              0
Arkansas PERS                                       1,825       1,825              0      109,601        109,601              0
Aubrey K. McClendon (1)                            10,000      10,000              0   16,525,412        600,555     15,924,857
Aviator Master Fund, Ltd.                           8,250       8,250              0      495,458        495,458              0
Banc of America Securities LLC                      3,000       3,000              0    1,346,867        180,167      1,166,700
Bancroft Convertible Fund, Inc. (2)                 1,000       1,000              0       84,358         60,056         24,303
Barclays Global Investors Equity Hedge Fund II         78          78              0        4,684          4,684              0
Boilermakers Blacksmith Pension Trust               2,950       2,950              0      177,164        177,164              0
C & H Sugar Company Inc.                              260         260              0       15,614         15,614              0
Chrysler Corporation Master Retirement Trust        5,000       5,000              0      300,278        300,278              0
Class C Trading Ltd.                                  370         370              0       22,221         22,221              0
Convertible Securities Fund (2)                       100         100              0       13,547          6,006          7,541
Credit Suisse First Boston Europe Limited              90          90              0        5,405          5,405              0
Custom Investments PCC, Ltd.                           90          90              0        5,405          5,405              0
Delaware PERS                                       1,050       1,050              0       63,058         63,058              0
Delta Air Lines Master Trust - CV                   1,700       1,700              0      102,094        102,094              0
Delta Airlines Master Trust                           630         630              0       37,835         37,835              0
Delta Pilots Disability & Survivorship Trust - CV     800         800              0       48,044         48,044              0
Duke Endowment                                        650         650              0       39,036         39,036              0
Ellsworth Convertible Growth and
 Income Fund, Inc. (2)                              1,000       1,000              0      120,812         60,056         60,756
F.M. Kirby Foundation, Inc.                         1,400       1,400              0       84,078         84,078              0
FTIF Franklin Income Fund                           5,000       5,000              0      300,278        300,278              0
FTVIPT Franklin Income Securities Fund              5,000       5,000              0      300,278        300,278              0
Goldman Sachs & Co. (2)                             3,000       3,000              0    1,716,018        180,167      1,535,851
Hawaiian Airlines Employees Pension Plan-IAM           65          65              0        3,904          3,904              0
Hawaiian Airlines Pilots Retirement Plan              200         200              0       12,011         12,011              0
Hawaiian Airlines Pilots Retirement Plan
for Salaried Employees                                 10          10              0          601            601              0
HFR CA Global Select Master Trust Account             150         150              0        9,008          9,008              0
ICI American Holdings Trust                           400         400              0       24,022         24,022              0
International Truck & Engine Corporation              700         700              0       42,039         42,039              0
Non-Contributory Retirement Plan Trust
 International Truck & Engine Corporation
 Retiree Health Benefit Trust                         300         300              0       18,017         18,017              0
International Truck & Engine Corporation
 Retirement Plan for Salaried Employees Trust         500         500              0       30,028         30,028              0

JMG Capital Partners, L.P. (2) 6,187 6,187 0 939,027 371,563 567,463 JMG Triton Offshore Fund, Ltd. (2) 10,313 10,313 0 1,254,863 619,352 635,510 KBC Convertible MAC28 Ltd 800 800 0 48,044 48,044 0 KBC Convertible Opportunities Fund 4,400 4,400 0 264,244 264,244 0 KBC Multi-Strategy Arbitrage Fund (2) 3,400 3,400 0 1,296,475 204,189 1,092,287 Lehman Brothers Inc. 31,885 31,885 0 1,914,870 1,914,870 0 Lyxor Master Fund 740 740 0 44,441 44,441 0 Melody AIM Ltd 400 400 0 24,022 24,022 0 Microsoft Corporation 1,600 1,600 0 96,089 96,089 0 Motion Picture Industry Health Plan - Active Member Fund 400 400 0 24,022 24,022 0 Motion Picture Industry Health Plan - Retiree Member Fund 300 300 0 18,017 18,017 0 Nabors Industries, Ltd. 10,000 10,000 0 600,555 600,555 0 Nations Convertible Securities Fund (2) 10,000 10,000 0 1,659,079 600,555 1,058,524 Nuveen Preferred & Convertible Fund JQC 8,955 8,955 0 537,797 537,797 0 Nuveen Preferred & Convertible Income Fund JPC 6,725 6,725 0 403,873 403,873 0 Oak Hill Contingent Capital Fund Ltd. 2,000 2,000 0 120,111 120,111 0 OCLC Online Computer Library Center 55 55 0 3,303 3,303 0 OCM Convertible Trust 3,300 3,300 0 198,183 198,183 0 OCM Global Convertible Securities Fund 100 100 0 6,006 6,006 0 Oppenheimer Convertible Securities Fund 4,500 4,500 0 270,250 270,250 0 Partner Reinsurance Company of the U.S. 1,000 1,000 0 60,056 60,056 0 Prudential Insurance Co of America 100 100 0 6,006 6,006 0 Qwest Occupational Health Trust 300 300 0 18,017 18,017 0 RBC Alternative Assets - Convertible Arbitrage 300 300 0 30,169 18,017 12,152 Relay 3 Asset Holding Co. Limited 39 39 0 2,342 2,342 0 Scorpion Offshore Investment Fund, Ltd. 337 337 0 20,239 20,239 0 Silver Convertible Arbitrage Fund, LDC 360 360 0 21,620 21,620 0 SP Holdings Ltd. 84 84 0 5,045 5,045 0 Standard Global Equity Partners II, L.P. 57 57 0 3,423 3,423 0 Standard Global Equity Partners, L.P. 1,255 1,255 0 75,370 75,370 0 Standard Global Equity Partners, SA, L.P. 598 598 0 35,913 35,913 0 Standard Pacific Capital Offshore Fund, Ltd. 4,803 4,803 0 288,447 288,447 0 Standard Pacific MAC 16 Ltd. 249 249 0 14,954 14,954 0 State Employees' Retirement Fund of the State of Delaware 2,000 2,000 0 120,111 120,111 0 State of Oregon/Equity 5,515 5,515 0 331,206 331,206 0 State of Oregon/SAIF Corporation 5,215 5,215 0 313,189 313,189 0 Syngenta AG 300 300 0 18,017 18,017 0 The St. Paul Travelers Companies, Inc. - Commercial Lines 1,100 1,100 0 66,061 66,061 0 The St. Paul Travelers Companies, Inc. - Personal Lines 700 700 0 42,039 42,039 0 Tom L. Ward (3) 10,000 10,000 0 18,067,821 600,555 17,467,266 Univest Multi-Strategy - Convertible Arbitrage 225 225 0 23,233 13,512 9,721 UnumProvident Corporation 500 500 0 30,028 30,028 0 US Bank FBO Benedictine Health Systems 360 360 0 21,620 21,620 0 Value Line Convertible Fund, Inc. 250 250 0 15,014 15,014 0 Vanguard Convertible Securities Fund, Inc. 15,200 15,200 0 912,844 912,844 0 WPG Convertible Arbitrage Overseas Master Fund 475 475 0 116,015 28,526 87,489 Xavex Convertible Arbitrage 10 Fund 220 220 0 13,212 13,212 0 Xavex Convertible Arbitrage 2 Fund 230 230 0 13,813 13,813 0

* Includes common stock issuable upon conversion of Chesapeake's 4.125% Cumulative Convertible Preferred Stock at a conversion rate of 60.0555 shares of common stock per share of preferred stock. (1) Mr. McClendon is our Chief Executive Officer. The number of shares of Common Stock indicated to be beneficially owned by him prior to and after completion of the offering includes 3,045,545 shares underlying stock options exercisable within 60 days of the date hereof and 1,848,640 shares underlying convertible securities. The number of shares of Common Stock indicated to be beneficially owned by him after completion of the offering represents approximately 6.4% of the total outstanding shares of common stock as of June 10, 2004. (2) The number of shares of Common Stock indicated to be beneficially owned after completion of the offering includes shares issuable within 60 days of the date hereof upon conversion of convertible securities. 3) Mr. Ward is our Chief Operating Officer. The number of shares of Common Stock indicated to be beneficially owned by him prior to and after completion of the offering includes 5,570,103 shares underlying stock options exercisable within 60 days of the date hereof and 1,848,640 shares underlying convertible securities. The number of shares of Common Stock indicated to be beneficially owned by him after completion of the offering represents approximately 7.0% of the total outstanding shares of common stock as of June 10, 2004.