VALMONT INDUSTRIES INC

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VALMONT INDUSTRIES, INC. 15000 VALMONT PLAZA OMAHA, NE 68154 SCAN TO VIEW MATERIALS & VOTEVOTE BY INTERNET - www.proxyvote.com or scan the QR Barcode aboveUse the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 p.m. Eastern Time on April 27, 2025 for shares held directly and by 11:59 p.m. Eastern Time on April 23, 2025 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 - 1-800-690-6903Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 p.m. Eastern Time on April 27, 2025 for shares held directly and by 11:59 p.m. Eastern Time on April 23, 2025 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-Z87088THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. KEEP THIS PORTION FOR YOUR RECORDSDETACH AND RETURN THIS PORTION ONLY The Board of Directors recommends you vote FOR the following: For Withhold For AllAllAllExcept Nominees:Deborah H. CaplanThe Board of Directors recommends you vote FOR proposals 2 and 3:For Against AbstainAdvisory approval of the company's executive compensation.Ratifying the appointment of Deloitte & Touche LLP as independent auditors for fiscal 2025.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. Signature [PLEASE SIGN WITHIN BOX]Date

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ANNUAL MEETING OF SHAREHOLDERSMonday, April 28, 202510:00 a.m.Valmont Industries, Inc. 15000Valmont PlazaOmaha, NE 68154Important 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.V35897-P07339-Z87088Monday, April 28, 202510:00 a.m.This proxy is solicited by the Board of Directors for use at the Annual Meeting on April 28, 2025.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