FORM10-K(Mark One) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934FOR THE FISCAL YEAR ENDED December31, 2025TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934FOR THE TRANSITION PERIOD OF _________ TO _________. Commission File Number: 001-41489 ENCORE ENERGY CORP. One Galleria Tower13355 Noel Rd, Suite 1700Dallas, Texas 75240(Address of principal executive offices, including zip code) Registrant’s telephone number, including area code:361-239-2025Securities registered pursuant to Section 12(b) of the Act: Securities registered pursuant to Section 12(g) of the Act:None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.☐YesNoIndicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.☐YesNo 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 12months (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.YesNo 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 (§232.405of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).YesNo 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 the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financialaccounting 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 over financial reportingunder 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 audit report.☐ 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 filing reflect the correctionof 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 by any of the registrant’sexecutive 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☐No☒ The aggregate market value of the common shares of the registrant held by non-affiliates of the registrant as of June 30, 2025, the last business day of the registrant’s most recentlycompleted second fiscal quarter, was $523.2 million based upon the closing price reported for such date on the Nasdaq Capital Market, LLC. As of March28, 2026, there were194,216,153shares of the registrant’s no par value common shares, the registrant’s only outstanding class of voting securities, outstanding. DOCUMENTS INCORPORATED BY REFERENCEPortions of the proxy statement for the registrant’s 2026 Annual Meeting of Shareholders are incorporated by reference in Part III of this Annual Report on Form 10-K. Auditor Firm Id:185 Auditor Name:KPMG LLPAuditor Location:Houston, Texas, United States TABLE OF CONTENTS Cautionary Note Regarding Forward Looking Statements3 PART I Item 1.Business and PropertiesItem 1A.Risk FactorsItem 1B.Unresolved Staff CommentsItem 1C.CybersecurityItem 2.PropertiesItem 3.Legal ProceedingsItem 4.Mine Safety Disclosures PART II Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities70Item 6.[Reserved]Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations80Item 7AQuantitative and Qualitative Disclosures about Market Risk92Item 8.Financial Statements and Supplementary DataF-1Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure42Item 9A.Controls and Procedures42Item 9B.Other Information43Item 9CDisclosure Regarding Foreign Jurisdictions that Prevent Inspections44 PART III Item 10.Directors, Executive Officers and Corporate Governance45Item 11.Executive Compensation45Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters45Item