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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Form 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 26 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from or Commission file number 1-31429 Delaware ( State or Other Jurisdiction of Incorporation or Organization ) One Valmont Plaza , Valmont Industries , Inc. Omaha , Nebraska ( Address of Principal Executive Offices ) Large accelerated filer Emerging Growth Company Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock $ 1.00 par value ( 402 ) 963-1000 ( Registrant's telephone number , including area code ) Symbol VMI 47-0351813 ( I.R.S. Employer Identification No. ) to 68154-5215 ( Zip Code ) Name of exchange on which registered New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark whether the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes x No o Indicate by check mark whether the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Exchange Act . Yes o No x Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Sections 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes x No o Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes x No o Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , or a smaller reporting company , or an emerging growth company . See definitions of “ large accelerated filer , ” “ accelerated filer , ” “ smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Accelerated filer Smaller reporting company Non - accelerated filer 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 . O Indicate by check mark whether the registrant has file a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report Yes No o Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No At February 19 , 2021 there were 21,215,198 of the Company's common shares outstanding . The aggregate market value of the voting stock held by non - affiliates of the Company based on the closing sale price the common shares as reported on the New York Stock Exchange on June 27 , 2020 was $ 2,212,151,860 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Company's proxy statement for its annual meeting of shareholders to be held on April 27 , 2021 ( the " Proxy Statement " ) , to be filed within 120 days of the fiscal year ended December 26 , 2020 , are incorporated by reference in Part III .