VALMONT INDUSTRIES INC (VMI): auditor change — Valmont dismisses Deloitte, appoints KPMG as auditor for FY2026

̈ Item 4.01 Changes in Registrant’s Certifying Accountant (a) Appointment of New Independent Registered Public Accounting Firm On March 3, 2026, following the conclusion of a process managed by the Audit Committee of the Board of Directors of Valmont Industries, Inc. (“the Company”), the Audit Committee approved the appointment of KPMG LLP (“KPMG”) as the Company’s independent registered public accounting firm beginning with the year ending December 26, 2026 and related interim periods, subject to the completion of KPMG’s customary client acceptance procedures and the execution of an engagement letter. During the Company’s fiscal years ended December 27,

(b) Dismissal of Independent Registered Public Accounting Firm On March 3, 2026, the Audit Committee dismissed Deloitte & Touche LLP (“Deloitte”) as the Company’s independent registered public accounting firm.