Board Chair — Mogens C. Bay: Mogens C. Bay is retiring from the Board and will be succeeded by Catherine J. Paglia.

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on July 21, 2026 announcing its financial results for its fiscal quarter ended June 27, 2026. The press release is furnished with this Form 8-K as Exhibit 99.1. The information in

Chief Financial Officer and Corporate Secretary — Thomas Liguori: Mr. Liguori is retiring and will be succeeded by John Schwietz.

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on April 21, 2026 announcing its financial results for its fiscal quarter ended March 28, 2026. The press release is furnished with this Form 8-K as Exhibit 99.1. The information in

Executive Vice President, Chief Financial Officer and Corporate Secretary — John Schwietz: Mr. Schwietz was promoted to a senior executive role.

Executive Vice President, Chief Financial Officer and Corporate Secretary — John Schwietz: John Schwietz was internally promoted to Executive Vice President, Chief Financial Officer and Corporate Secretary.

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 co…

Director — Paul T. Maass: Paul T. Maass was appointed to the board of directors and the size of the board was increased.

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on February 17, 2026 announcing its financial results for its fiscal year and quarter ended December 27, 2025. The press release is furnished with this Form 8-K as Exhibit 99.1. The information in

Chief Accounting Officer — William E. Johnson: The filing discloses the appointment of an external candidate as Chief Accounting Officer, with the incumbent shifting to a different role rather than leaving the company.

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on October 21, 2025 announcing its financial results for its quarter ended September 27, 2025. The press release is furnished with this Form 8-K as Exhibit 99.1. The information in

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on July 22, 2025 announcing its financial results for its quarter ended June 28, 2025. The press release is furnished with this Form 8-K as Exhibit 99.1. The information provided under this

Entry into a Material Definitive Agreement. On July 10, 2025, Valmont Industries, Inc. (the “Company”) and its wholly-owned subsidiaries Valmont Industries Holland B.V. and Valmont Group Pty. Ltd., as Borrowers, entered into a Third Amended and Restated Credit Agreement with JPMorgan Chase Bank, N.A., as Administrative Agent, and the other lenders party thereto (the “Restated Credit Agreement”) providing for a five year, $800 million committed unsecured revolving credit facility. The Restated…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information reported under

Executive — John T. Donahue: The filing discloses the separation of two executives whose positions were eliminated, representing a genuine loss of senior management, though the process is described as an orderly transition with severance.

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on April 22, 2025 announcing its financial results for quarter ended March 29, 2025. The press release is furnished as Exhibit 99.1. The information provided under this

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on February 18, 2025 announcing its financial results for its fiscal year and quarter ended December 28, 2024. The press release is furnished as Exhibit 99.1. The information provided under this

Director — Deborah Caplan: The filing discloses the appointment of a new non-employee director to the board, which is a routine governance event rather than a departure of a senior executive.

Results of Operations and Financial Condition. Valmont Industries, Inc. issued a press release on October 22, 2024 announcing its financial results for its fiscal quarter ended September 28, 2024. The press release, along with the presentation to be used during its earnings call on October 23, 2024, are furnished with this Form 8-K as Exhibit 99.1 and Exhibit 99.2, respectively. The information in this

CFO — Thomas Liguori: The filing announces the appointment of an external candidate as CFO, replacing the interim officer, which is a significant management change but not a departure of a sitting executive.

Results of Operations and Financial Condition. ​ Valmont Industries, Inc. issued a press release on July 24, 2024 announcing its financial results for its fiscal quarter ended June 29, 2024. The press release, along with the presentation to be used during its earnings call on July 25, 2024, are furnished with this Form 8-K as Exhibit 99.1 and Exhibit 99.2, respectively. ​ The information in this

Group President, Agriculture and Chief Strategy Officer — Aaron M. Schapper: The filing discloses the negotiated separation of a senior executive (Group President and Chief Strategy Officer) with a transition period and severance, representing a genuine departure from the management team.

Group President, Agriculture and Chief Strategy Officer — Aaron M. Schapper: The departure of a senior executive holding the dual title of Group President and Chief Strategy Officer without an immediate named successor represents a significant loss of leadership.

Results of Operations and Financial Condition. ​ Valmont Industries, Inc. issued a press release on May 1, 2024 announcing its financial results for its fiscal quarter ended March 30, 2024. The press release, along with the presentation to be used during its earnings call on May 2, 2024, are furnished with this Form 8-K as Exhibit 99.1 and Exhibit 99.2, respectively. ​ The information in this