Valmont Industries Investor Presentation — April 2021

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

First Quarter Earnings Presentation

April 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.

April 22, 2021 2 | Valmont Industries, Inc. | 1Q 2021 Earnings Presentation| Valmont Industries, Inc. | 1Q 2021 Earnings Presentation April 22, 2021 3STEVE KANIEWSKI

PRESIDENT & CHIEF EXECUTIVE OFFICER

1Q 2021 Segment Sales and Segment Summaries

April 22, 2021 | Valmont Industries, Inc. | 1Q 2021 Earnings Presentation 4

Solid First Quarter Pricing and Operational Performance•Higher volumes from increasing demand for

renewable energy and utilities’ continued investments in grid resiliency•Favorable pricing, growth in wireless

communication sales, and favorable currency

impacts more than offset by anticipated lower transportation market volumes, as delays in the FAST Act approval during 2020, and COVID -19

impacts continued to affect timing of road and construction projects

•Strong wireless communication structures and

components demand led by carriers increasing

capital spend in support of 5G buildouts•Favorable pricing and higher internal volumes partially offset by lower external volumes in North America due to disruptions from COVID -19 and