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GIBRALTAR INDUSTRIES, INC.

For the period ended Dec 31, 2025. Filed Feb 26, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 26, 2026

ROCK$31.30-7.9%Stored close · as of Nov 10, 2026

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Contents

Item 8. Report of Independent Registered Public Accounting Firm

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Gibraltar Industries, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Gibraltar Industries, Inc. (the Company) as of December 31, 2025 and 2024, the related consolidated statements of operations, comprehensive (loss) income, stockholders' equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company'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), and our report dated February 26, 2026 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. 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 audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Lane Supply, Inc. business combination - valuation of customer relationship intangible assets
Description of the MatterAs described in Note 5 to the consolidated financial statements, on February 11, 2025, the Company purchased all the outstanding stock of Lane Supply Inc. (Lane Supply) for purchase consideration of approximately $118.0 million. The purchase price for the acquisition was preliminarily allocated to the assets acquired and liabilities assumed based upon their respective fair values estimated as of the date of acquisition. Auditing the Company’s accounting for its acquisition of Lane Supply was complex and highly subjective due to the significant estimation uncertainty in determining the fair value of the acquired identified intangible assets of $66.9 million, notably the acquired customer relationships with estimated acquisition-date fair values of $56.6 million.The Company used the multi-period excess earnings method to value the acquired customer relationship intangible assets. The significant estimation uncertainty was primarily due to the sensitivity of the respective fair values to certain of the key assumptions included in the valuation, notably for forecasted revenue growth rates, EBITDA margins, and applicable discount rate used in the valuation of the acquired customer relationships. These significant assumptions are forward looking and could be affected by future economic and market conditions.
How We Addressed the Matter in Our AuditWe obtained an understanding, evaluated the design and tested the operating effectiveness of the Company’s controls addressing the risks of material misstatement relating to the estimation of the acquisition-date fair value of the customer relationships. For example, we tested controls over management’s review of the valuation methodologies and key assumptions used therein to estimate fair value, as well as management’s controls over the completeness and accuracy of the information within the valuation models.To test the estimated fair value of the acquired customer relationships, our audit procedures included, among others, evaluating the appropriateness of the valuation methodology used, evaluating the significant assumptions discussed above, and testing the completeness and accuracy of the underlying data supporting the significant assumptions and estimates. For the forecasted revenue and EBITDA margins, we compared the assumptions to current industry and economic trends, and the historic financial performance of the acquired business. We also performed sensitivity analyses to evaluate the changes in the fair value of the customer relationship intangible asset that would result from changes in the significant assumptions. We involved our valuation specialists to assist in evaluating the methodologies used to estimate the fair value of the customer relationships and to test certain significant assumptions, including the discount rate, which included a comparison of the selected rates to benchmark data.

/s/Ernst & Young LLP

We have served as the Company‘s auditor since 2005.

Buffalo, New York

February 26, 2026

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