Nine Energy Service 2025年度报告

(Mark One) ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934FOR THE FISCAL YEAR ENDED DECEMBER31, 2025 OR☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FORTHETRANSITIONPERIODFROMTO Commission File Number: 001-38347 Nine Energy Service, Inc.(Exact name of registrant as specified in its charter) (281) 730-5100(Registrant’s telephone number, including area code) Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on whichregisteredCommon Stock, par value $0.01 pershareNINENYSE American 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 SecuritiesAct.Yes☐No☒ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of theAct.Yes☐No☒ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange 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 submittedpursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant 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 smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer Accelerated filer If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section13(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 theeffectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by theregistered 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 theregistrant included in the filing reflect 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 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 Act).Yes☐No☒ The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant on the last business day of theregistrant’s most recently completed second fiscal quarter (based on the closing sales price on the NYSE on June 30, 2025) was$28,438,468. Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13 or 15(d) ofthe Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court. Yes☒No☐ The number of shares of the registrant’s common stock outstanding at April27, 2026 was 13,949,990. None EXPLANATORY NOTE This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends our Annual Report on Form 10-K for the fiscal yearended December 31, 2025 (the “Original Report”), which was filed with the Securities and Exchange Commission (the “SEC”) onMarch 4, 2026 (the “Original Filing Date”). The purpose of this Amendment is to provide the information required by Items 10through 14 of Part III of Form 10-K, which was previously omitted from the Original Report in reliance on General Instruction G(3) toForm 10-K. This Amendment also amends Item 15 of Part IV of the Original Report to include as exhibits the new certifications requiredby Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), pursuant to Section 302 of theSarbanes-Oxley Act of 2002. Because no financial statements are included in this Amendment and this Amendment does not containor amend any disclosure with respect to Item 307 or 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have beenomitted. We are not including the certifications under Section 906 of the Sarbanes-Oxley Act of 2002 because no