ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year ended December 31, 2025 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from _____ to _____ Commission file number 1-12911 Granite Construction Incorporated (Exact name of registrant as specified in its charter) Registrant’s telephone number, including area code: (831) 724-1011 Securities 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. YesNo Indicate 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 of1934 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 suchfiling 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 405of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submitsuch 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, oran emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growthcompany” in Rule 12b-2 of the Exchange Act. Large accelerated filerAccelerated filerNon-accelerated filerSmaller reporting companyEmerging growth company If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with anynew 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 its internalcontrol over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm thatprepared 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 inthe 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 compensationreceived by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). The aggregate market value of voting and non-voting common equity held by non-affiliates of the registrant was $4.1billion as of June 30, 2025,based upon the price at which the registrant’s common stock was last sold as reported on the New York Stock Exchange on such date. At February6, 2026, 43,503,673 shares of common stock, par value $0.01, of the registrant were outstanding. Certain information called for by Part III is incorporated by reference to the definitive Proxy Statement for the 2026 Annual Meeting of Shareholdersof Granite Construction Incorporated, which will be filed with the Securities and Exchange Commission not later than 120 days after December31,2025. Index DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS PART I Item 1.BUSINESSItem 1A.RISK FACTORSItem 1B.UNRESOLVED STAFF COMMENTSItem 1C.CYBERSECURITYItem 2.PROPERTIESItem 3.LEGAL PROCEEDINGSItem 4.MINE SAFETY DISCLOSURES MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS ANDISSUER PURCHASES OF EQUITY SECURITIES[RESERVED]MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OFOPERATIONSQUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKFINANCIAL STATEMENTS AND SUPPLEMENTARY DATACHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIALDISCLOSURECONTROLS AND PROCEDURESOTHER INFORMATIONDISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCEEXECUTIVE COMPENSATIONSECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATEDSTOCKHOLDER MATTERSCERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCEPRINCIPAL ACCOUNTING FEES AND SERVICES EXHIBIT 21EXHIBIT 23.1EXHIBIT 31.1EXHIBIT 31.2EXHIBIT 32EXHIBIT 95EXHIBIT 101.INSEXHIBIT 101.SCHEXHIBIT 101.CALEXHIBIT 101.DEFEXHIBIT 101.LABEXHIBIT 101.PREEXHIBIT 104 DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS From time to time, Gra