
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025or☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 RANGER ENERGY SERVICES,INC. (Exact name of registrant as specified in its charter) Houston, Texas 77042(713) 935-8900(Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant’s Principal Executive Offices) Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☐No☒Indicate by check mark if the Registrant is not required to file reports pursuant to Section13 or Section15(d) of the Act. Yes☐No☒ Indicate by check mark whether the Registrant: (1)has filed all reports required to be filed by Section13 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☐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 duringthe preceding 12 months (or for 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, 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: Non-accelerated filer☐ 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 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 audit report. Yes☒No☐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 thecorrection 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 by any 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☐No☒ As of June 30, 2025, the aggregate market value of the Class A Common Stock of Ranger Energy Services, Inc. held by non-affiliates of the Registrant was $244.2million,based on the closing market price as reported on the New York Stock Exchange of $11.94. As of February28, 2026, the Registrant had 23,550,288 shares of Class A CommonStock and zero shares of Class B Common Stock outstanding. DOCUMENTS INCORPORATED BY REFERENCEPortions of the registrant’s definitive proxy statement for the2026Annual Meeting of Stockholders, to be filed no later than 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates, are incorporated by reference into Part III of this Annual Report on Form 10-K. RANGER ENERGY SERVICES,INC.TABLE OF CONTENTS ItemPagePARTIItem 1.Business1Item 1A.Risk Factors11Item 1B.Unresolved Staff Comments25Item 1C.Cybersecurity26Item 2.Properties27Item 3.Legal Proceedings27Item 4.Mine Safety Disclosure28PARTIIItem 5.Market for Registrant’s Common Equity, Related Stockholders’ Matters and Issuer Purchases of EquitySecurities29Item 6.[Reserved]30Item 7.Management's Discussion and Analysis of Financial Condition and Results of Operations30Item 7A.Quantitative and Qualitative Disclosures about Market Risk42Item 8.Financial Statements and Supplementary Data44Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosures70Item 9A.Controls and Procedures70Item 9B.Other Information74Item 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections74PARTIIIItem 10.Directors, Executive Officers and Corporate Governance75Item 11.Executive Compensation75Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters75Item 13.Certain Relationships and Related Transactions and Director Independence75Item 14.Principal Accounting Fees and Services75PARTIVItem 15.Exhibits, Financial Statement Schedules76Item 16.Form 10-K Summary79SIGNATURES79 CAUTIONARY