X0306 4 2020-06-11 0 0001370450 Willdan Group, Inc. WLDN 0001588202 Procell Adam C C/O WILLDAN GROUP, INC. 2401 EAST KATELLA AVE SUITE 300 ANAHEIM CA 92806 0 1 0 0 EVP, Chief Strategy Officer Common Stock 2020-06-11 4 A 0 15000 0 A 19206 D The shares of restricted stock vest in three equal installments on each of June 11, 2021, June 11, 2022 and June 11, 2023, subject to the reporting person's continued service to the Issuer through the applicable vesting date. Includes 15,000 shares of restricted stock that vest in three equal installments on each of June 11, 2021, June 11, 2022 and June 11, 2023, subject to the reporting person's continued service to the Issuer through the applicable vesting date. /s/ Stacy McLaughlin, Attorney-in-fact for Adam C. Procell 2020-06-15