X0306 4 2020-06-11 0 0001370450 Willdan Group, Inc. WLDN 0001251079 RENKEN KEITH 2401 EAST KATELLA AVE SUITE 300 ANAHEIM CA 92806 1 0 0 0 Common Stock 2020-06-11 4 A 0 3053 0 A 53363 D Common Stock 80400 I See footnote 3 The shares of restricted stock vest in two substantially equal installments on each of June 11, 2021 and June 11, 2022. Includes (i) 829 shares of restricted stock that vest June 13, 2021 and (ii) 1,084 shares of restricted stock that vest on June 13, 2021. The shares of common stock are held by the LVRJC Partnership. The reporting person is the managing partner of the LVRJC Partnership and has sole voting and investment control over the shares of the Issuer's common stock held therein. /s/ Stacy McLaughlin Attorney-in-Fact for Keith Renken 2020-06-15