VALMONT INDUSTRIES INC

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The board adopted the Valmont 2026 Employee Stock Purchase Plan (the “ESPP”) on February 23, 2026, subject to shareholder approval. The ESPP is not intended to qualify for special tax treatment under Section 423 of the Internal Revenue Code. The ESPP is designed to encourage and enable our eligible employees to acquire a proprietary interest in Valmont through the ownership of our common stock, which is intended to enhance their sense of participation in Valmont’s performance and provide an incentive for them to continue employment.

The ESPP will allow employees to accumulate payroll deductions over designated purchase periods, which are then used to purchase shares of Valmont common stock at fair market value on designated purchase dates. Valmont will provide plan participants with a matching grant of one share for each three shares purchased by the participant on the applicable purchase date. A total of 200,000 shares of common stock, or approximately one percent of our outstanding shares as of March 2, 2026, may be purchased or otherwise issued under the ESPP. We believe the shares reserved under the Plan will be sufficient for purchases and grants under the Plan for five to seven years.

The following is a summary of the material terms of the ESPP. This summary is qualified in its entirety by reference to the ESPP document, a copy of which is attached as an appendix to the electronic copy of this proxy statement filed with the SEC and may be accessed from the SEC’s home page (www.sec.gov) or on our website at www. https://investors.valmont.com where it is an appendix to the electronic copy of this proxy statement. We will provide shareholders a copy of the ESPP without charge upon request by email to InvestorRelations@valmont.com.