Valmont Industries Investor Presentation — October 2021

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© 2021 Valmont®Industries, Inc.Valmont Industries, Inc.

Third Quarter Earnings Presentation

October 21, 2021Disclosure Regarding Forward- Looking Statements

These slides contain (and the accompanying oral discussion will contain) “forward-looking statements”

within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve known and unknown risks, uncertainties and other factors that could cause the actual results of the Company to differ materially from the results expressed or implied by such statements, including general economic and business conditions, conditions affecting the industries served by the Company and its subsidiaries including the continuing and developing effects of COVID -19 including the effects

of the outbreak on the general economy and the specific economic effects on the Company’s business and that of its customers and suppliers, competitor responses to the Company’s products and services, the overall market acceptance of such products and services, the integration of acquisitions and other factors disclosed in the Company’s periodic reports filed with the Securities and Exchange Commission. Consequently, such forward-looking statements should be regarded as the Company’s current plans, estimates and beliefs. The Company does not undertake and specifically declines any obligation to publicly release the results of any revisions to these forward-looking statements that may be made to reflect any future events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events.

October 21, 2021 2 | Valmont Industries, Inc. | 3Q 2021 Earnings Presentation| Valmont Industries, Inc. | 3Q 2021 Earnings Presentation October 21, 2021 3STEVE KANIEWSKI

PRESIDENT & CHIEF EXECUTIVE OFFICER

3Q 2021 Segment Sales and Segment Summaries

October 21, 2021 | Valmont Industries, Inc. | 3Q 2021 Earnings Presentation 4

Significant Irrigation Revenue Growth•Strong underlying market demand for improving

grid resiliency and renewable energy usage, and increased pricing driving continued sales growth

•Higher pricing and volumes mostly offset by combined solar and offshore wind projects in 2020 that did not repeat or were pushed to future quarters from customers’ supply chain disruptions

•North American utilities increasing planned investments in transmission and distribution projects•Focus on pricing and sales growth of more than

25% in wireless communication products and

components driven by 5G buildouts and heavy investments by the major carriers

•3Q operating profit margins above 12% for first time

•International markets benefiting from higher stimulus and infrastructure investments, especially in Australia•Sales growth led by pricing and improved economic conditions compared to last year