Valmont Industries Investor Presentation — July 2021

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

Second Quarter Earnings Presentation

July 22, 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.

July 22, 2021 2 | Valmont Industries, Inc. | 2Q 2021 Earnings Presentation| Valmont Industries, Inc. | 2Q 2021 Earnings Presentation July 22, 2021 3STEVE KANIEWSKI

PRESIDENT & CHIEF EXECUTIVE OFFICER

2Q 2021 Segment Sales and Segment Summaries

July 22, 2021 | Valmont Industries, Inc. | 2Q 2021 Earnings Presentation 4

Significant Irrigation and Utility Support

Structures Revenue Growth•Sales growth was led by higher volumes due to

increasing demand for renewable energy

generation, strong broad- based demand from

ongoing investments in grid hardening and modernization, and increased pricing•Sales growth in wireless communication products

and components slightly offset by anticipated

lower North American transportation market volumes

•Higher global lighting and transportation sales as pricing improved in all regions

•Higher sales in wireless communication

structures and components driven by 5G buildouts, small cell integrated products and components, and favorable pricing•Improving end- market demand, favorable pricing