(Mark One) OR Gulfport Energy Corporation(Exact name of registrant as specified in its charter) ________________ 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 No6 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 thepreceding 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 thepast 90 days. Yes6No 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). Yes6No 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 emerginggrowth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of theExchange Act. 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 revisedfinancial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control overfinancial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its auditreport.6 If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filingreflect the correction of an error to previously issued financial statements. Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received byany of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes No6 Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13 or 15(d) of the Securities Exchange Actof 1934 subsequent to the distribution of securities under a plan confirmed by the court. Yes6No The aggregate market value of our common stock held by non-affiliates on June 30, 2025 was approximately $3.1 billion. As of February 19, 2026, there were18,558,415 shares of our $0.0001 par value common stock outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of Gulfport Energy Corporation’s Proxy Statement for the 2026 Annual Meeting of Stockholders are incorporated by reference in Items 10, 11, 12, 13 and14 of Part III of this Form 10-K. PART IIIITEM 10.DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE103ITEM 11.EXECUTIVE COMPENSATION103ITEM 12.SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATEDSTOCKHOLDER MATTERS103ITEM 13.CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE103ITEM 14.PRINCIPAL ACCOUNTING FEES AND SERVICES103PART IVITEM 15.EXHIBITS AND FINANCIAL STATEMENT SCHEDULES104ITEM 16.FORM 10-K SUMMARY107Signatures108 DEFINITIONS Unless the context otherwise indicates, references to “us,” “we,” “our,” “ours,” “Gulfport,” the “Company” and “Registrant”refer to Gulfport Energy Corporation and its consolidated subsidiaries. All monetary values, other than per unit and per shareamounts, are stated in thousands of U.S. dollars unless otherwise specified. In addition, the following are other abbreviations anddefinitions of certain terms used within this Annual Report on Form 10-K: 2026 Senior Notes.൰8.00% Senior Notes due May 17, 2026. ϮϬϮϵ^ĞŶŝŽƌEŽƚĞƐ/ŶĚĞŶƚƵƌĞ͘൰Indenture dated September 13, 2024 between Gulfport Operating, UMB Bank, NationalAssociation, as trustee, and the guarantors party thereto. ^͘൰Accounting Standards Codification. ^h͘൰Accounting Standards Update. ĂŶŬƌƵƉƚĐLJŽĚĞ͘൰Chapter 11 of Title 11 of the United States Code. ĂŶŬƌƵƉƚĐLJŽƵƌƚ͘൰The United States Bankruptcy Court for the Southern District of Texas. Bbl.൰One stock tank barrel, or 42 U.S. gallons liquid volume, used herein in reference to crude oil or other liquid hydrocarbons. Bcf.൰One billion cubic feet of natural gas. ĐĨĞ͘൰One billion cubic feet of natural gas equivalent, with one barrel of NGL and crude oil being equivalent to 6,000 cubic feet ofnatural gas. Board of Directors (Board).൰The board of directors of Gulfport Energy Corporation. Btu.൰British thermal unit, w