Ultralife Corp 2025年年度报告

(Mark One)☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year ended December 31, 2025 (Exact name of registrant as specified in its charter) Indicate by check mark whether 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 Section 13 or Section 15(d) of the Act. 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 Securities ExchangeAct 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 Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant toRule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant wasrequired 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 reportingcompany or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” Accelerated filer☒Smaller reporting company☒ Large accelerated filer☐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 complyingwith any new or revised financial 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 itsinternal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrantincluded in the filing reflect the correction of an error to previously issued financial statements. Yes☐No☒ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-basedcompensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). Yes☐No Indicate by check mark whether the registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act). Yes☐No☒ On June 30, 2025, the aggregate market value of the common stock held by non-affiliates as defined in Rule 405 under the Securities Act of1933) of the registrant was approximately $90,469,809 (in whole dollars) based upon the closing price for such common stock as reported on As of April 24, 2026, the registrant had 16,656,503 shares of common stock outstanding. DOCUMENTS INCORPORATED BY REFERENCE None. EXPLANATORY NOTE This Amendment No. 1 to the Annual Report on Form 10-K of Ultralife Corporation (the “Company”) for the year ended December 31, 2025as originally filed with the Securities and Exchange Commission (the “SEC”) on March 23, 2026 (the “Original Form 10-K”), is being filedsolely to include the information required by Items 10, 11, 12, 13 and 14 of Part III and to amend Item 15 of Part IV and the Index of Exhibitsof Original Form 10-K. This information required by Part III of Form 10-K was omitted from the Original Form 10-K in reliance on GeneralInstruction G(3) to Form 10-K, which permits the information in the above referenced items to be incorporated in the Form 10-K by referencefrom our definitive proxy statement if such proxy statement is filed no later than 120 days after our fiscal year-end. We are including this Part In accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended (“the Exchange Act”), Part III, Items 10, 11, 12, 13and 14, and Part IV, Item15 of the Original Form 10-K are hereby amended and restated in their entirety.Accordingly, the reference on thecover page of the Original Form 10-K to the incorporation by reference of portions of our definitive proxy statement into Part III of theOriginal Form 10-K is hereby deleted.Pursuant to Rule 12b-15 and Rule 13a-14(a) under the Exchange Act, this Amendment No.1 contains Except as expressly described above, this Amendment No.1 does not amend, modify, or otherwise update any financial or other informationin or on exhibits filed with the Original Form 10-K.Accordingly, this Amendment No.1 should be read in conjunction with the Original Form10-K and our other filings with the SEC, including without limitation, the Company’s consolidated financial statements and related disclosuresin the Original Form 10-K, which remain unchanged.In addition, this Amendment No.1 does not change any financial information in the Unless expressly indicated or th