GIBRALTAR INDUSTRIES, INC. (0000912562) (Filer)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) October 15, 2026 (October 14, 2026)

GIBRALTAR INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

3556 Lake Shore Road

P.O. Box 2028

Buffalo, New York 14219-0228

(Address of principal executive offices) (Zip Code)

(716) 826-6500

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐     Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐     Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐     Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐     Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging 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 any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01 Entry Into a Material Definitive Agreement

On October 14, 2026, D.S.B. Holding Corp., a Delaware corporation (“Seller”) and direct wholly-owned subsidiary of Gibraltar Industries, Inc., a Delaware corporation (“Gibraltar” or the “Company”), and The D.S. Brown Company, an Ohio corporation (“DSB”) and indirect wholly-owned subsidiary of Gibraltar, entered into a Securities Purchase Agreement (the “Agreement”), with GCP Applied Technologies Inc., a Delaware corporation (“Buyer”), and Saint-Gobain Corporation, a Pennsylvania corporation (“Parent”), as guarantor of certain obligations of Buyer under the Agreement. Gibraltar is a party to the Agreement for the limited purposes of insurance and special tax indemnification provisions. Subject to the terms and conditions set forth in the Agreement, Seller has agreed to sell to Buyer all of the issued and capital stock of DSB (such sale transaction, the “Transaction”). Buyer is an affiliate of Parent.

On the terms and subject to the conditions set forth in the Agreement, Buyer has agreed to pay Seller an aggregate purchase price of $208.0 million in cash at the closing of the Transaction, subject to customary adjustments related to working capital, indebtedness, cash and transaction expenses, as set forth in the Agreement.

The Agreement contains customary representations, warranties, and covenants by each of Seller, DSB and Buyer. Among other things, between the date of the Agreement and the closing of the Transaction, subject to certain exceptions, DSB has agreed to use commercially reasonable efforts to conduct its business in the ordinary course and to not take certain actions without Buyer’s prior written consent.

The closing of the Transaction is subject to certain customary closing conditions, including, among others: (a) the expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”); (b) the absence of an injunction or legal prohibition prohibiting the closing of the Transaction and (c) the accuracy of the parties’ respective representations and warranties and compliance by each party with their respective covenants and obligations contained in the Agreement, subject in each case to certain standards of materiality. Subject to the satisfaction of these closing conditions, the Transaction is expected to close before the end of calendar year 2026. No vote of Gibraltar’s stockholders is required to approve the Transaction.

The Agreement includes certain termination provisions, including the right of either Seller or Buyer to terminate the Agreement if (a) the closing of the Transaction has not occurred by January 31, 2027 (subject to up to five 30-day automatic extensions) in the event that the waiting period under the HSR Act has not expired or been terminated or an order or injunction or law preventing the closing of the Transaction related to competition laws matters is in effect, and the other conditions for the closing of the Transaction have been satisfied as of such date (other than conditions that by their terms cannot be satisfied until the closing, which conditions are capable of being satisfied at the closing), (b) there is a final, non-appealable decision, judgment or order or other action enjoining or otherwise prohibiting the Transaction by a governmental body prohibiting the closing of the Transaction or (c) in the event of material breach by the other party of its representations, warranties and covenants, subject to a customary notice and cure period.

The foregoing summary of the Agreement does not purport to be complete and is qualified in its entirety by reference to the text of the Agreement, attached as Exhibit 10.1 to this Current Report on Form 8-K and incorporated by reference herein.

The foregoing summary has been included to provide investors and security holders with information regarding the terms of the Agreement and is qualified in its entirety by the terms and conditions of the Agreement. It is not intended to provide any other factual information about Gibraltar, Seller, DSB, Buyer or their respective subsidiaries and affiliates, including Parent. The Agreement contains representations and warranties by each of the parties to the Agreement, which were made only for purposes of the Agreement and as of specified dates. The representations, warranties, covenants, and agreements in the Agreement were made solely for the benefit of the parties to the Agreement, are subject to limitations agreed upon by the contracting parties, including being qualified by confidential disclosures made for the purposes of allocating contractual risk between the parties to the Agreement instead of establishing these matters as facts, and are subject to standards of materiality applicable to the contracting parties that may differ from those applicable to investors. Investors should not rely on the representations, warranties, covenants, and agreements or any descriptions thereof as characterizations of the actual state of facts or condition of Gibraltar, Seller, DSB, Buyer or their respective subsidiaries and affiliates. Moreover, information concerning the subject matter of the representations, warranties, covenants, and agreements may change after the date of the Agreement, which subsequent information may or may not be fully reflected in Gibraltar’s public disclosures, and unless required by applicable law, Gibraltar undertakes no obligation to update such information.

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Item 7.01 Regulation FD Disclosure*

On October 15, 2026, Gibraltar issued a press release, attached as Exhibit 99.1 to this Current Report on Form 8-K, announcing entry into the Agreement described above.

The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits

    (a)-(c)    Not Applicable

    (d)    Exhibits:

*Certain schedules, exhibits and annexes 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, exhibits and annexes upon request by the SEC; provided, however, that the Company may request confidential treatment pursuant to Rule 24b-2 of the Exchange Act for any schedules, exhibits or annexes so furnished.

Information Concerning Forward Looking Statements

Certain information set forth in this Current Report on Form 8-K and exhibits attached hereto, other than historical statements, contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 that are based, in whole or in part, on current expectations, estimates, forecasts, and projections about Gibraltar’s business, and management’s beliefs about future operations, results, and financial position. These statements are not guarantees of future performance and are subject to a number of risk factors, uncertainties, and assumptions. Actual events, performance, or results could differ materially from the anticipated events, performance, or results expressed or implied by such forward-looking statements. Factors that could cause actual results to differ materially from current expectations include, among other things: the occurrence of any event, change or other circumstances that could give rise to the termination of the Agreement or could cause the consummation of the Transaction to be delayed or to fail to occur; the failure to obtain certain required regulatory approvals or the failure to satisfy any of the other closing conditions to the completion of the Transaction within the expected timeframes or at all; risks related to disruption of management’s attention from Gibraltar’s ongoing business operations due to the Transaction; the effect of the announcement of the Transaction on the ability of Gibraltar to retain and hire key personnel and maintain relationships with its customers, suppliers and others with whom it does business, or on its operating results and business generally; the ability of Gibraltar to meet expectations regarding the timing and completion of the Transaction; the outcome of any legal proceedings that may be instituted against Gibraltar related to the Transaction; changes to economic conditions and customer demand for the Company’s products; the availability and pricing of principal raw materials and component parts, supply chain challenges causing project delays and field operations inefficiencies and disruptions, the loss of any key customers, adverse effects of inflation, the ability to continue to improve operating margins, the ability to generate order flow and sales and increase backlog; the ability to translate backlog into net sales, other general economic conditions and conditions in the particular markets in which Gibraltar operates, changes in spending due to laws and government incentives, such as the Infrastructure Investment and Jobs Act, changes in customer demand and capital spending, competitive factors and pricing pressures, the ability to develop and launch new products in a cost-effective manner, the ability to realize synergies from other newly acquired businesses, disruptions to IT systems, the impact of trade and regulation, rebates, credits and incentives and variations in government spending and ability to derive expected benefits from restructuring, productivity initiatives, liquidity enhancing actions, and

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other cost reduction actions. Before making any investment decisions regarding the Company, we strongly advise you to read the section entitled “Risk Factors” in the most recent annual report on Form 10-K which can be accessed under the “SEC Filings” link of the “Investor Info” page of the website at www.Gibraltar1.com. The Company undertakes no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by applicable law or regulation.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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