UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Securities Registered Pursuant to Section 12(b) of the Act: FORM 10-Q [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2019 [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 1-13726 CHESAPEAKE ENERGY CORPORATION (Exact name of registrant as specified in its c ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2018 [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 1-13726 CHESAPEAKE ENERGY CORPORATION (Exact name of registrant as specified in its charter) Oklahoma 73-1395733 (State or other jurisdiction of incor ...