X0609 4 2026-04-24 0000102729 VALMONT INDUSTRIES INC VMI 0001185232 BAY MOGENS C false 15000 VALMONT PLAZA OMAHA NE 68154 true false false false false Common Stock 2026-04-24 4 S false 5000 494.07 D 124809 D Common Stock 2026-04-24 4 S false 7550 491.48 D 117259 D Common Stock 2026-04-24 4 S false 2000 490.00 D 115259 D Common Stock 2026-04-24 4 S false 1500 492.45 D 113759 D Common Stock 2026-04-24 4 S false 1450 493.965 D 112309 D Common Stock 2026-04-27 4 A false 341 0 A 112650 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $494.00 to $494.24, inclusive. The reporting person undertakes to provide to Valmont Industries, Inc., any security holder of Valmont Industries, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $491.01 to $491.685, inclusive. Restricted stock unit award which vests on the anniversary of the grant date, unless deferred by the reporting person, and on vesting settled in an equal number of shares of common stock. POA attached. /s/ William Eric Johnson for Mogens C. Bay 2026-04-28