VALMONT INDUSTRIES INC

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Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) DateTO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:KEEP THIS PORTION FOR YOUR RECORDSTHIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLYV35896-P07339-Z87088! ! !ForAllWithholdAllFor AllExceptFor Against Abstain! ! !To withhold authority to vote for any individualnominee(s), mark "For All Except" and write thenumber(s) of the nominee(s) on the line below.VALMONT INDUSTRIES, INC.15000 VALMONT PLAZAOMAHA, NE 68154Nominees:01) Avner M. Applbaum02) Daniel P. Neary03) Theo Freye04) Joan Robinson-Berry3. Ratifying the appointment of Deloitte & Touche LLP as independent auditors for fiscal 2024.The Board of Directors recommends you vote FOR proposals 2 and 3:2. Advisory approval of the company's executive compensation.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.1. Election of DirectorsVALMONT INDUSTRIES, INC.The Board of Directors recommends you vote FOR thefollowing: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 signpersonally. All holders must sign. If a corporation or partnership, please sign in full corporateor partnership name by authorized officer.! ! !VOTE BY INTERNET - www.proxyvote.com or scan the QR Barcode aboveUse the Internet to transmit your voting instructions and for electronic deliveryof information. Vote by 11:59 p.m. Eastern Time on May 5, 2024 for sharesheld directly and by 11:59 p.m. Eastern Time on May 1, 2024 for shares heldin a Plan. Have your proxy card in hand when you access the web site andfollow the instructions to obtain your records and to create an electronic votinginstruction form.VOTE BY PHONE - 1-800-690-6903Use any touch-tone telephone to transmit your voting instructions. Voteby 11:59 p.m. Eastern Time on May 5, 2024 for shares held directly and by11:59 p.m. Eastern Time on May 1, 2024 for shares held in a Plan. Have yourproxy 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-paidenvelope we have provided or return it to Vote Processing, c/o Broadridge,51 Mercedes Way, Edgewood, NY 11717.SCAN TOVIEW MATERIALS & VOTE w

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V35897-P07339-Z87088ANNUAL MEETING OF SHAREHOLDERSMonday, May 6, 202410:00 a.m.This proxy is solicited by the Board of Directors for use at the Annual Meeting on May 6, 2024.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 sideImportant Notice Regarding the Availability of Proxy Materials for the Annual Meeting:The Notice and Proxy Statement, Annual Report and 10-K are available at www.proxyvote.com.ANNUAL MEETING OF SHAREHOLDERSMonday, May 6, 202410:00 a.m.Valmont Industries, Inc.15000 Valmont PlazaOmaha, NE 68154