Filed pursuant to Rule 424(b)(3) Registration No. 333-61508 Prospectus Supplement No. 1 dated February 13, 2003 to Prospectus dated May 30, 2001 Chesapeake Energy Corporation This prospectus may be used in connection with the resale of 1,117,216 shares of our outstanding common stock and 1,118,567 shares of our common stock issuable upon exercise of warrants. This prospectus also may be used for the resale of warrants to purchase 462,690 shares of our common stock. ----------------------------------------- The selling securityholder table on page 10 of the prospectus is amended by this supplement no. 1 to add the following securityholders who acquired the shares of our common stock indicated upon the exercise of warrants prior to their expiration on January 23, 2003: Securities Beneficially Securities Beneficially Owned Before Offering Securities Offered Owned After Offering ----------------------- ------------------ ----------------------- Common Common Name of Selling Common Stock Stock Stock Securityholder Warrants Shares Percent Warrants Shares Warrants Shares -------------- -------- ------ ------- -------- ------ -------- ------- Donaldson, Lufkin & Jenrette -- 6,820 * -- 6,820 -- -- Foxglove & Co. -- 1,818 * -- 1,818 -- -- Hare & Co. -- 112 * -- 112 -- -- Heisen & Co. -- 2,682 * -- 2,682 -- -- Kane & Co. -- 2,453 * -- 2,453 -- -- UBS #23/TNCBTDHYP -- 49 * -- 49 -- -- ---------- * Indicates less than 1%