X0306 4 2022-01-19 0001499422 RBB Bancorp RBB 0001711566 Huang Tsu Te 1055 WILSHIRE BLVD SUITE 1200 LOS ANGELES CA 90017 1 EVP Common Stock, No Par Value 218251 D Restricted Stock Units 0.0000 Restricted Stock Units 1196 1196 D These restricted stock units vest in three equal annual installments beginning one year after the 01/19/2022 date of grant. There will be no expiration date once restricted stock units vest. Tsu Te Huang was granted 1,196 restricted stock units that will vest in three equal annual installments on 01/19/2023, 01/19/2024, and 01/19/2025. /s/ Tsu Te Huang 2022-01-24