GIBRALTAR INDUSTRIES, INC. 10-K

Item 9A. Controls and Procedures Evaluation of Disclosure Controls and Procedures The Company maintains a system of disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934). Management of the Company, under the supervision and with the participation of the Chief Executive Officer and the Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures as of the end of the period covered in this report. Based upon that evaluation and the definition of disclosure controls and procedures contained in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that as of the end of such period the Company’s disclosure controls and procedures were effective. Management’s Annual Report on Internal Control Over Financial Reporting The management of Gibraltar Industries, Inc. is responsible for establishing and maintaining adequate internal control over financial reporting for the Company, as such term is defined in Rule 13a-15(f) under the Securities Exchange Act of 1934. Under the supervision and with the participation of management, including the Company’s Chief Executive Officer and Chief Financial Officer, the Company conducted an evaluation of the effectiveness of internal control over financial reporting based on the framework in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework ) . Based on the Company’s evaluation, management concluded that the Company’s internal control over financial reporting was effective as of December 31, 2025. The Company completed four acquisitions in 2025, which were excluded from management's annual report on internal control over financial reporting as of December 31, 2025. The Company acquired Lane Supply, Inc. on February 11, 2025, Construction Metal Products, Inc. and Mountain Companies (Flatiron Steel, LLC, Teton Steel, LLC, & Epic Steel, LLC) on March 31, 2025, and Gideon Steel Panel Company, LLC on July 31, 2025. Since their respective acquisition dates, the results of these acquired businesses are included in the Company's 2025 consolidated financial statements and collectively constituted 9%, 3%, 5%, and 1% of total assets, respectively, as of December 31, 2025 and 9%, 3%, 2%, and 0.3% of net sales, respectively, for the year then ended. The effectiveness of the Company’s internal control over financial reporting as of December 31, 2025 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which is included below in this Item 9A of this Annual Report on Form 10-K. Changes in Internal Control over Financial Reporting There have been no changes in the Company’s internal control over financial reporting (as defined by Rule 13a-15(f)) that occurred during the three months ended December 31, 2025 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting. 69 Table of Contents Report of Independent Registered Public Accounting Firm To the Stockholders and the Board of Directors of Gibraltar Industries, Inc. Opinion on Internal Control Over Financial Reporting We have audited Gibraltar Industries, Inc.’s internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control–Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Gibraltar Industries, Inc. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2025, based on the COSO criteria. As indicated in the accompanying Management's Annual Report on Internal Control Over Financial Reporting, management's assessment of and conclusion on the effectiveness of internal control over financial reporting did not include the internal controls of Construction Metal Products, Inc., Gideon Steel Panel Company, LLC, Mountain Companies (Flatiron Steel, LLC, Teton Steel, LLC, & Epic Steel, LLC), and Lane Supply, Inc., which are included in the 2025 consolidated financial statements of the Company and constituted 3%, 1%, 5%, and 9% of total assets, respectively, as of December 31, 2025 and 3%, 0.3%, 2%, and 9% of net sales, respectively, for the year then ended. Our audit of internal control over financial reporting of the Company also did not include an evaluation of the internal control over financial reporting of Construction Metal Products, Inc., Gideon Steel Panel Company LLC, Mountain Companies (Flatiron Steel, LLC, Teton Steel, LLC & Epic Steel, LLC), and Lane Supply, Inc. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the 2025 consolidated financial statements of the Company and our report dated February 26, 2026 expressed an unqualified opinion thereon. Basis for Opinion The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion. Definition and Limitations of Internal Control Over Financial Reporting A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable 70 Table of Contents assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. /s/ Ernst & Young LLP Buffalo, New York February 26, 2026 71 Table of Contents Item 9B. Other information During the quarter ended December 31, 2025, none of the Company's directors or officers (as defined in Rule 16a-1(f) under the Exchange Act) adopted, modified, or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement” as each term is defined in Item 408(a) of Regulation S-K . Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections Not applicable. PART III Item 10. Directors, Executive Officers and Corporate Governance The information called for by this Item 10 is incorporated herein by reference to the Company’s definitive proxy statement for the 2026 Annual Meeting of Stockholders (the "2026 Proxy Statement"), which will be filed with the SEC pursuant to Regulation 14A under the Exchange Act not later than 120 days after the end of the Company's fiscal year ended December 31, 2025. Such information will appear under the captions "Proposal 1 - Election of Directors," "Corporate Governance," and "Directors and Executive Officers of the Company," as applicable. Code of Ethics The Company has adopted a Code of Ethics that applies to all of the Company's directors, officers, employees and representatives, including the Company's Chief Executive Officer and Chief Financial Officer. The complete text of this Code of Ethics is available in the corporate governance section of the Company's website at www.gibraltar1.com. The Company intends to disclose future amendments to certain provisions of the Company's Code of Ethics, or waivers of such provisions, applicable to the Company's Chief Executive Officer and Chief Financial Officer on the Company's website identified above. The information on the Company's website is not, and shall not be deemed to be, a part of this Report or incorporated into any other filings made with the SEC. Insider Trading Arrangements and Policies The Company has adopted an insider trading policy that governs the purchase, sale, and/or other dispositions of its securities that applies to the Company and its directors, officers, employees, and other covered persons and entities, that the Company believes is reasonably designed to promote compliance with insider trading laws, rules and regulations and applicable listing standards. A copy of the Company's insider trading policy is filed with this Annual Report on Form 10-K as Exhibit 19.1. Item 11. Executive Compensation The information called for by this Item 11 is incorporated herein by reference to the 2026 Proxy Statement including under the captions "Non-Employee Director Compensation," "Compensation Discussion and Analysis," "Compensation and Human Capital Committee Report," and "Compensation of Executive Officers", excluding the information under the subheading "Pay Versus Performance". The information set forth under the subcaption "Compensation and Human Capital Committee Report" should not be deemed filed nor should it be incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act except to the extent the Company specifically incorporates such reports by reference therein. Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters The information in the sections "Equity Compensation Plan Information" and "Security Ownership of Certain Beneficial Owners and Management" of the 2026 Proxy Statement is incorporated herein by reference. 72 Table of Contents Item 13. Certain Relationships and Related Transactions, and Director Independence The information in the sections "Corporate Governance" and "Certain Relationships and Related Party Transactions" of the 2026 Proxy Statement is incorporated herein by reference. Item 14. Principal Accountant Fees and Services The information in the section "Information about our Independent Registered Public Accounting Firm" of the 2026 Proxy Statement is incorporated herein by reference. PART IV Item 15. Exhibits and Financial Statement Schedules (a) The following documents are filed as part of this report: (1) Financial Statements: (i) Report of Independent Registered Public Accounting Firm (ii) Consolidated Statements of Operations for the Years Ended December 31, 2025, 2024, and 2023 (iii) Consolidated Statements of Comprehensive (Loss) Income for the Years Ended December 31, 2025, 2024, and 2023 (iv) Consolidated Balance Sheets as of December 31, 2025 and 2024 (v) Consolidated Statements of Cash Flows for the Years Ended December 31, 2025, 2024, and 2023 (vi) Consolidated Statements of Stockholders’ Equity for the Years Ended December 31, 2025, 2024, and 2023 (vii) Notes to Consolidated Financial Statements (2) Financial Statement Schedules: All schedules are omitted because they are not required, or because the required information is provided in the consolidated financial statements, including the notes thereto. (3) Exhibits Required by Item 601 of Regulation S-K: The list of exhibits to this report is set forth on the attached " Exhibit Index ." Each management contract or compensatory plan or arrangement is identified as such in the Exhibit Index . (b) Exhibits: The exhibits listed in the " Exhibit Index " are filed or furnished with this report or incorporated by reference into this report. 73 Table of Contents Exhibit Index No. Description 2.1 Securities Purchase Agreement, by and among Gibraltar Industries, Inc., Arundel Square Garden LLC and Barnsbury Estate LLC, dated as of November 16, 2025 (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K filed November 17, 2025) (1) 3.1 Certificate of Incorporation of Gibraltar Industries, Inc., as amended by: (i) Certificate of Amendment of Certificate of Incorporation of Gibraltar Industries, Inc. filed on October 27, 2004, (ii) Certificate of Change of Registered Agent and Registered Office of Gibraltar Industries, Inc. filed on May 11, 2005, (iii) Certificate of Amendment of Certificate of Incorporation of Gibraltar Industries, Inc. filed on May 22, 2012, (iv) Certificate of Amendment of Certificate of Incorporation of Gibraltar Industries, Inc. filed on May 11, 2015, (v) Certificate of Change of Registered Agent and/or Registered Office filed on January 10, 2019, (vi) Certificate of Amendment of Certificate of Incorporation of Gibraltar Industries, Inc. filed on May 6, 2021 (incorporated by reference to Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q filed August 3, 2021), (vii) Certificate of Amendment to the Certificate of Incorporation of Gibraltar Industries, Inc. filed on May 3, 2023 (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed May 8, 2023), and (viii) Certificate of Amendment of the Certificate of Incorporation of Gibraltar Industries, Inc. filed on May 1, 2025 (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed May 1, 2025) 3.2 Second Amended and Restated By-Laws of Gibraltar Industries, Inc., effective as of December 7, 2022 (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K/A filed December 9, 2022) 4.1 Description of Registrant's Securities (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K/A filed December 9, 2022) 10.1 * Correspondence dated December 17, 2018, from William P. Montague to William T. Bosway (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed January 7, 2019) 10.2 * Restrictive Covenants and Severance Agreement by and between Gibraltar Industries, Inc. and William T. Bosway, dated December 17, 2018 and effective January 2, 2019 (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K filed January 7, 2019) 10.3 * Correspondence dated June 6, 2024, from William T. Bosway to Joseph A. Lovechio (incorporated by reference to Exhibit 10.3 to the Company's Annual Report on Form 10-K for the year ended December 31, 2024 filed February 19, 2025) 10.4 * Correspondence dated October 13, 2020, from William T. Bosway to Katherine E. Bolanowski (incorporated by reference to Exhibit 10.4 to the Company's Annual Report on Form 10-K for the year ended December 31, 2024 filed February 19, 2025) 10.5 * Correspondence dated April 11, 2023, from William T. Bosway to Janet A. Catlett (incorporated by reference to Exhibit 10.5 to the Company's Annual Report on Form 10-K for the year ended December 31, 2024 filed February 19, 2025) 10.6 * Gibraltar Industries, Inc. Change in Control Executive Severance Plan, effective as of July 28, 2023 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed August 2, 2023) 10.7 * Change in Control Agreement between the Company and William T. Bosway dated December 17, 2018 and effective January 2, 2019 (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K filed January 7, 2019), as amended by First Amendment to Change in Control Agreement and Employment Agreement , dated July 28, 2023 (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K filed August 2, 2023) 74 Table of Contents No. Description 10.8 * Gibraltar Deferred Compensation Plan Amended and Restated, effective January 1, 2009 (incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed February 24, 2009) 10.9 * Amended and Restated Gibraltar Industries, Inc. 2005 Equity Incentive Plan (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed December 21, 2006), as amended by Second Amendment to Third Amendment and Restatement of Equity Incentive Plan, dated May 7, 2015 (incorporated by reference to Exhibit 10.4 to the Company’s Current Report on Form 8-K filed May 12, 2015) 10.10 * Gibraltar Industries, Inc. Omnibus Code Section 409A Compliance Policy, dated December 30, 2008 (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K filed January 6, 2009) 10.11 * Summary Description of Annual Management Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed February 24, 2009) 10.12 Credit Agreement dated as of December 8, 2022 among Gibraltar Industries, Inc. and Gibraltar Steel Corporation of New York, as borrowers, the lenders named therein, KeyBank National Association, as administrative agent, swing line lender and issuing lender, KeyBanc Capital Markets Inc., as joint lead arranger and joint book runner, Bank of America, N.A., M&T Bank, PNC Bank, National Association, as joint lead arrangers, joint book runners and co-syndication agents, and Comerica Bank, TD Bank, N.A. and Wells Fargo Bank, National Association, as co-documentation agents (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed December 9, 2022) (1) 10.13 Credit Agreement, dated as of February 2, 2026, by and among Gibraltar Industries, Inc., the lenders and other parties party thereto and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed February 2, 2026) (1) 10.1 4 * Gibraltar Industries, Inc. 2015 Equity Incentive Plan (incorporated by reference to Exhibit 10.4 to the Company's Current Report on Form 8-K filed January 7, 2016), and as amended by Gibraltar Industries, Inc. 2015 Equity Incentive Plan First Amendment dated May 5, 2017 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed May 9, 2017) 10.1 5 * Gibraltar Industries, Inc. 2015 Management Stock Purchase Plan dated May 7, 2015 (incorporated by reference to Exhibit 10.5 to the Company's Current Report on Form 8-K filed May 12, 2015), as amended by the First Amendment to the Management Stock Purchase Plan dated December 31, 2015 (incorporated by reference to Exhibit 10.5 to the Company's Current Report on Form 8-K filed January 7, 2016), and further amended by the Gibraltar Industries, Inc. Management Stock Purchase Plan Second Amendment dated January 28, 2016 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed January 28, 2016) 10.1 6 * Gibraltar Industries, Inc. Amended and Restated 2018 Equity Incentive Plan (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed May 8, 2023) 10.1 7 * Gibraltar Industries, Inc. 2018 Management Stock Purchase Plan dated November 1, 2018 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed November 1, 2018) 10.1 8 * Gibraltar Industries, Inc. Amended and Restated 2016 Stock Plan for Non-Employee Directors (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed May 5, 2022) 10. 19 * Gibraltar Industries, Inc. Amended and Restated 2016 Stock Plan for Non-Employee Directors Form of Award of Common Stock (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K filed May 5, 2022) 10. 2 0 * Gibraltar Industries, Inc. Non-Employee Director Stock Deferral Plan (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K filed May 10, 2016) 10. 2 1 * Gibraltar Industries, Inc. 2018 Equity Incentive Plan Form of Award of Performance Units dated May 4, 2018 (incorporated by reference to Exhibit 10.22 to the Company's Annual Report on Form 10-K for the year ended December 31, 2018 filed February 27, 2019) 75 Table of Contents No. Description 10. 2 2 * Gibraltar Industries, Inc. 2018 Equity Incentive Plan Form of Award of Restricted Units dated May 4, 2018 (incorporated by reference to Exhibit 10.23 to the Company's Annual Report on Form 10-K for the year ended December 31, 2018 filed February 27, 2019) 10. 2 3 * Form of Award of Performance Units under the Gibraltar Industries, Inc. Amended and Restated 2018 Equity Incentive Plan (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2023 filed August 2, 2023) 10. 2 4 * Form of Award of Restricted Units (Executive) under the Gibraltar Industries, Inc. Amended and Restated 2018 Equity Incentive Plan (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2023 filed November 2, 2023) 10. 2 5 * Form of Award of Restricted Units (Management) under the Gibraltar Industries, Inc. Amended and Restated 2018 Equity Incentive Plan (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2023 filed November 2, 2023) 10. 2 6 * Form of Award of Restricted Units (CEO Discretionary) under the Gibraltar Industries, Inc. Amended and Restated 2018 Equity Incentive Plan (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2023 filed November 2, 2023) 19.1 * Insider Trading Policy (incorporated by reference to Exhibit 19.1 to the Company's Annual Report on Form 10-K for the year ended December 31, 2024 filed February 19, 2025) 21.1 ** Subsidiaries of the Registrant 23.1 ** Consent of Independent Registered Public Accounting Firm 31.1 ** Certification of Chairman of the Board, President and Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2 ** Certification of Vice President and Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 32.1 **^ Certification of Chairman of the Board, President and Chief Executive Officer pursuant to Title 18, United States Code, Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32.2 **^ Certification of Vice President and Chief Financial Officer pursuant to Title 18, United States Code, Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 97 Gibraltar Industries, Inc. Policy for the Recovery of Erroneously Awarded Compensation (incorporated by reference to Exhibit 97 to the Company's Annual Report on Form 10-K for the year ended December 31, 2023 filed February 21, 2024) 101.INS** Inline XBRL Instance Document 101.SCH** Inline XBRL Taxonomy Extension Schema Document 101.CAL** Inline XBRL Taxonomy Extension Calculation Linkbase Document 101.LAB** Inline XBRL Taxonomy Extension Label Linkbase Document 101.PRE** Inline XBRL Taxonomy Extension Presentation Linkbase Document 101.DEF** Inline XBRL Taxonomy Extension Definition Linkbase Document 104** Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) (1) Schedules (or similar attachments) have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Company hereby undertakes to furnish supplemental copies of any of the omitted schedules upon request by the U.S. Securities and Exchange Commission; provided, that the Company may request confidential treatment pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, for any schedules so furnished. 76 Table of Contents * Document is a management contract or compensatory plan or agreement. ** Submitted electronically with this Annual Report on Form 10-K. ^ Documents are furnished not filed. (c) Financial Statement Schedules None. Item 16. Form 10-K Summary None. 77 Table of Contents SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. GIBRALTAR INDUSTRIES, INC. By: /s/ William T. Bosway William T. Bosway Chairman of the Board, President and Chief Executive Officer Dated: February 26, 2026 Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated. SIGNATURE TITLE DATE /s/ William T. Bosway Chairman of the Board, President and Chief Executive Officer (principal executive officer) February 26, 2026 William T. Bosway /s/ Joseph A. Lovechio Vice President and Chief Financial Officer (principal financial and accounting officer) February 26, 2026 Joseph A. Lovechio /s/ Atlee Valentine Pope Lead Independent Director February 26, 2026 Atlee Valentine Pope /s/ Mark G. Barberio Director February 26, 2026 Mark G. Barberio /s/ James S. Metcalf Director February 26, 2026 James S. Metcalf /s/ Gwendolyn G. Mizell Director February 26, 2026 Gwendolyn G. Mizell /s/ Linda K. Myers Director February 26, 2026 Linda K. Myers /s/ James B. Nish Director February 26, 2026 James B. Nish /s/ Manish H. Shah Director February 26, 2026 Manish H. Shah 78