SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED) ------------------------------------------------------------------------------- JUNE 3, 2004 (May 28, 2004) CHESAPEAKE ENERGY CORPORATION ------------------------------------------------------------------------------- (Exact name of Registrant as specified in its Charter) OKLAHOMA 1-13726 73-1395733 ------------------------------------------------------------------------------- (State or other jurisdiction (Commission File No.) (IRS Employer of incorporation) Identification No.) 6100 NORTH WESTERN AVENUE, OKLAHOMA CITY, OKLAHOMA 73118 ------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) (405) 848-8000 ------------------------------------------------------------------------------- (Registrant's telephone number, including area code) INFORMATION TO BE INCLUDED IN THE REPORT ITEM 5. OTHER MATTERS Chesapeake Exploration Limited Partnership, a wholly owned subsidiary of Chesapeake Energy Corporation, entered into an International Swap Dealers Association, Inc. ("ISDA") Master Agreement with Deutsche Bank AG on May 28, 2004. The ISDA Master Agreement, Schedule to the ISDA Master Agreement and Credit Support Annex to the Schedule to the ISDA Master Agreement are filed as Exhibits 99.1, 99.2 and 99.3 to this current report on Form 8-K and are incorporated in their entirety into Item 5 of this report. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits. The following exhibits are filed herewith: 99.1 ISDA Master Agreement 99.2 Schedule to the ISDA Master Agreement 99.3 Credit Support Annex to the Schedule to the ISDA Master Agreement SIGNATURE 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, thereunto duly authorized. CHESAPEAKE ENERGY CORPORATION By: /S/ AUBREY K. MCCLENDON ---------------------------------- Aubrey K. McClendon Chairman of the Board and Chief Executive Officer Dated: June 3 2004