VALMONT INDUSTRIES INC

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SCAN TOVIEW MATERIALS & VOTEVALMONT INDUSTRIES, INC. 15000 VALMONT PLAZAOMAHA, NE 68154VOTE BY INTERNET - www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 p.m. Eastern Time on April 26, 2026 for shares held directly and by 11:59 p.m. Eastern Time on April 22, 2026 for shares held in a Plan. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.VOTE BY PHONE -1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 p.m. Eastern Time on April 26, 2026 for shares held directly and by 11:59 p.m. Eastern Time on April 22, 2026 for shares held in a Plan. Have your proxy card in hand when you call and then follow the instructions.VOTE BY MAILMark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:V35896-P07339-Z87088KEEP THIS PORTION FOR YOUR RECORDSTHIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED.DETACH AND RETURN THIS PORTION ONLYVALMONT INDUSTRIES, INC.The Board of Directors recommends you vote FOR the following:1.Election of DirectorsNominees:01)Mogens C. Bay02)Ritu Favre03)Richard A. Lanoha04)Paul T. MaassFor Withhold For All AllAllExceptTo withhold authority to vote for any individual nominee(s), mark "For All Except" and write the number(s) of the nominee(s) on the line below. The Board of Directors recommends you vote FOR proposals 2 and 3:For Against Abstain2.Approval of Valmont 2026 Employee Stock Purchase Plan.3.Advisory approval of the Company's executive compensation.4. Ratifying the appointment of the Company’s independent auditors for fiscal 2026.NOTE: In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the meeting or any adjournment thereof.Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer.Signature [PLEASE SIGN WITHIN BOX]DateSignature (Joint Owners)Date

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ANNUAL MEETING OF SHAREHOLDERSMonday, April 27, 202610:00 a.m.Valmont Industries, Inc. 15000 Valmont PlazaOmaha, NE 68154Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting:The Notice and Proxy Statement, Annual Report and Form 10-K are available at www.proxyvote.com.V35897-P07339-Z87088ANNUAL MEETING OF SHAREHOLDERSMonday, April 27, 202610:00 a.m.This proxy is solicited by the Board of Directors for use at the Annual Meeting on April 27, 2026.By signing the proxy, you revoke all prior proxies and appoint Mogens C. Bay and Catherine James Paglia, and each of them with full power of substitution, to vote your shares on the matters shown on the reverse side and in their discretion on any other matters which may come before the Annual Meeting and all adjournments.This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted in accordance with the Board of Directors' recommendations.Continued and to be signed on reverse side