FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended February28, 2026 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 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 Exchange 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 thepreceding 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 90days. 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(§232.405 of this chapter) during the 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, a smaller reporting company, or an emerging growthcompany. See definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the ExchangeAct. 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 overfinancial 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.☒ 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 require a recovery analysis of incentive-based compensation received by any of theregistrant'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 August31, 2025, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was $3,332,353,625 based on the closing saleprice as reported on the New York Stock Exchange. As of April16, 2026, there were 29,880,309 shares of the registrant's common stock ($1.00 par value) outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's Proxy Statement for its 2026 Annual Meeting of Shareholders to be filed with the Securities and Exchange Commission pursuant toRegulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K are incorporated by reference into Part III, Items 10-14 of this Annual Report on Form 10-K. AZZ Inc.FORM 10-KFor the Fiscal Year Ended February28, 2026INDEX PART I Item 1.Item1A.Item1B.Item1C.Item 2.Item 3.Item 4. BusinessRisk FactorsUnresolved Staff CommentsCybersecurityPropertiesLegal ProceedingsMine Safety Disclosures PART II Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchasesof Equity Securities[Reserved]Management's Discussion and Analysis of Financial Condition and Results of OperationsQuantitative and Qualitative Disclosures About Market RiskFinancial Statements and Supplementary DataChanges in and Disagreements with Accountants on Accounting and Financial DisclosureControls and ProceduresOther InformationDisclosure Regarding Foreign Jurisdictions that Prevent Inspections Item 6.Item 7.Item7A.Item 8.Item 9.Item9A.Item9B.Item 9C. PART IIIItem10. Directors, Executive Officers and Corporate GovernanceExecutive CompensationSecurity Ownership of Certain Beneficial Owners and Management and RelatedStockholder MattersCertain Relationships and Related Transactions, and Director IndependencePrincipal Accountant Fees and Services Item11.Item12. PART IV Exhibits and Financial Statement SchedulesForm 10-K Summary SIGNATURES Forward-Looking Statements Certain statementsherein about our expectations of future events or results constitute forward-looking statements for purposes of thesafe harbor provisions of The Private Securities Litigation Reform Act of 1995. You can identify forward-looking statements by terminologysuch as "may," "could," "should," "expects," "plans," "will," "might," "would," "projects," "currently," "intends," "outlook," "forecasts,""targets," "anticipates," "believes," "estimates," "predicts," "potential," "continue," or the negative of these terms or other comparableterminology. Suc