UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 8-K/A

                                 CURRENT REPORT

                         PURSUANT TO SECTION 13 OR 15(D)
                                     OF THE
                         SECURITIES EXCHANGE ACT OF 1934



                DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED)
- -------------------------------------------------------------------------------
                     SEPTEMBER 29, 2004 (SEPTEMBER 23, 2004)


                          CHESAPEAKE ENERGY CORPORATION
- -------------------------------------------------------------------------------
             (Exact name of Registrant as specified in its Charter)


         OKLAHOMA                     1-13726                  73-1395733
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(State or other jurisdiction     (Commission File No.)        (IRS Employer
      of incorporation)                                     Identification No.)


  6100 NORTH WESTERN AVENUE, OKLAHOMA CITY, OKLAHOMA               73118
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      (Address of principal executive offices)                   (Zip Code)


                                 (405) 848-8000
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              (Registrant's telephone number, including area code)


Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communications pursuant to Rule 425 under the Securities Act
    (17 CFR 230.1425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
    Exchange Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the
    Exchange Act (17 CFR 240.13e-4(c))

This report amends our Current Report on Form 8-K filed September 28, 2004. It is filed solely for the purpose of filing the Certificate of Elimination referred to therein as an exhibit. ITEM 9.01 - EXHIBITS EXHIBIT NO. DOCUMENT DESCRIPTION - ----------- -------------------- 3.1 Certificate of Elimination 2

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized. CHESAPEAKE ENERGY CORPORATION By: /S/ AUBREY K. MCCLENDON --------------------------------- Aubrey K. McClendon Chairman of the Board and Chief Executive Officer Dated: September 29, 2004 3


                           CERTIFICATE OF ELIMINATION


         Chesapeake  Energy  Corporation  (the  "Corporation"),   a  corporation
organized and existing under the Oklahoma General Corporation Act,

DOES HEREBY CERTIFY:

         FIRST:  That the Corporation  has acquired  283,600 shares of its 6.75%
Cumulative  Convertible Preferred Stock, par value $.01 per share (the "Acquired
Shares") through conversion by the holder.

         SECOND:  That the Board of  Directors  of the  Corporation  has adopted
resolutions retiring the Acquired Shares.

         THIRD:  That the  Certificate of Designation  for the 6.75%  Cumulative
Convertible  Preferred Stock (the  "Certificate of  Designation")  prohibits the
reissuance of shares when so retired and,  pursuant to the provisions of Section
1078 of the Oklahoma  General  Corporation  Act,  upon the date of the filing of
this Certificate of Elimination, the Certificate of Designation shall be amended
so as to  reduce  the  number  of  authorized  shares  of the  6.75%  Cumulative
Convertible  Preferred  Stock by 283,600  shares,  being the total number of the
Acquired  Shares retired by the Board of Directors.  Accordingly,  the number of
authorized but  undesignated  shares of preferred  stock of the Company shall be
increased by 283,600  shares.  The retired  Acquired  Shares have a par value of
$.01 per share and an aggregate par value of $2,836.00.

         IN WITNESS  WHEREOF,  the Corporation has caused this Certificate to be
executed by its  Treasurer  and Senior  Vice  President  - Human  Resources  and
attested to by its Secretary, this 21st day of September, 2004.


                                       CHESAPEAKE ENERGY CORPORATION



                                  By:  /S/ MARTHA A BURGER
                                       --------------------------------------
                                       Martha A. Burger
                                       Treasurer and
                                       Senior Vice President - Human Resources


ATTEST:


/S/ JENNIFER M. GRIGSBY
- ------------------------------
Jennifer M. Grigsby
Secretary