1 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) OCTOBER 23, 2000 (OCTOBER 20, 2000) - -------------------------------------------------------------------------------- CHESAPEAKE ENERGY CORPORATION - -------------------------------------------------------------------------------- (Exact name of Registrant as specified in its Charter) OKLAHOMA 1-13726 73-1395733 - -------------------------------------------------------------------------------- (State or other jurisdiction (Commission (IRS Employer of incorporation) File No.) 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)

2 INFORMATION TO BE INCLUDED IN THE REPORT ITEM 5. OTHER EVENTS On October 20, 2000, Chesapeake Energy Corporation ("Chesapeake") issued a press release announcing third quarter earnings release and conference call. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits. The following exhibit is filed herewith: 99. Press Release issued by the Registrant on October 20, 2000. 2

3 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: October 23, 2000 3

4 INDEX TO EXHIBITS EXHIBIT NUMBER DESCRIPTION - ------- ----------- 99 Press Release issued by the Registrant on October 20, 2000.

1 EXHIBIT 99 CHESAPEAKE ENERGY CORPORATION - -------------------------------------------------------------------------------- P. O. BOX 18496 OKLAHOMA CITY, OKLAHOMA 73154-0496 405/848-8000 405/843-0573 FAX CONTACT: MARC ROWLAND CHIEF FINANCIAL OFFICER 405/879-9232 TOM PRICE, JR. SR. VP-CORPORATE DEVELOPMENT 405/879-9257 FOR IMMEDIATE RELEASE OCTOBER 20, 2000 CHESAPEAKE ENERGY CORPORATION ANNOUNCES THIRD QUARTER EARNINGS RELEASE AND CONFERENCE CALL OKLAHOMA CITY, Oct. 20, 2000 -- Chesapeake Energy Corporation (NYSE:CHK) today announced plans to issue its third quarter 2000 earnings release following the close of trading on the New York Stock Exchange on Thursday, October 26, 2000. A conference call is scheduled for Friday morning, October 27, 2000 at 8:00 am CDT to discuss the release. The telephone number to access the conference call is (719) 457-2622. For those unable to participate in the conference call, a replay will be available for audio playback at 11:00 am CDT on October 27, 2000, and will run through midnight Friday, November 3, 2000. The number to access the replay is (719) 457-0820; passcode for the replay is 478858. The conference call will also be simulcast live on the internet and can be accessed either by going directly to the Chesapeake website at www.chkenergy.com and selecting "Shareholder Information", or by going to either www.Vcall.com or www.streetevents.com, and select "Individual Investor Center". For those who cannot listen to the live broadcast, a replay will be available shortly after the call and will be available for approximately ninety days thereafter. Chesapeake Energy Corporation is the 10th largest independent natural gas producer in the U.S. (pro forma for the acquisition of Gothic Energy Corporation). Headquartered in Oklahoma City, the company's operations are focused on exploring, developing and acquiring natural gas reserves in the Mid-Continent region of the United States. #