0001370450 2026-06-17 2026-06-17 0001370450 false 8-K 2026-06-17 WILLDAN GROUP, INC. DE 001-33076 14-1951112 2401 East Katella Avenue Suite 300 Anaheim CA 92806 800 424-9144 false false false false Common Stock, par value $0.01 per share WLDN NASDAQ false