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Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) ANNUAL REPORT UNDER SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT UNDER SECTION 13 OR 15 ( d ) OF SECURITIES EXCHANGE ACT OF 1934 For the transition period from Commission File Number 001-19514 to Gulfport Energy Corporation ( Exact Name of Registrant As Specified in Its Charter ) Delaware ( State or Other Jurisdiction of Incorporation or Organization ) 3001 Quail Springs Parkway Oklahoma City , Oklahoma ( Address of Principal Executive Offices ) 73-1521290 ( IRS Employer Identification Number ) ( 405 ) 252-4600 ( Registrant Telephone Number , Including Area Code ) Securities registered pursuant to Section 12 ( b ) of the Act : None ( ¹ ) 73134 ( Zip Code ) ( 1 ) On November 27 , 2020 , our common stock was suspended from trading on the NASDAQ Stock Market LLC ( " NASDAQ " ) . On November 30 , 2020 , our common stock began trading on the OTC Pink Marketplace maintained by the OTC Markets Group , Inc. under the symbol " GPORQ " . On February 2 , 2021 , NASDAQ filed a Form 25 delisting our common stock from trading on NASDAQ , which delisting became effective 10 days after the filing of the Form 25. In accordance with Rule 12d2-2 of the Securities Exchange Act of 1934 , as amended ( the " Exchange Act " ) , the de - registration of our common stock under section 12 ( b ) of the Exchange Act became effective on February 12 , 2021 . Securities registered pursuant to Section 12 ( g ) of the Act : Common Stock ( Title of Class ) Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No X Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Large Accelerated filer □ Accelerated filer > Non - accelerated filer □ Smaller reporting company □ Emerging growth company – No > Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( Section 232.405 of this chapter ) during the preceding 12 months ( or such shorter period that the registrant was required to submit such files ) . Yes No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act .