X0508 4 2024-02-21 0001499422 RBB Bancorp RBB 0001711919 Morris David Richard 1055 WILSHIRE BLVD SUITE 1200 LOS ANGELES CA 90017 1 1 CEO 0 Common Stock, No Par Value 37723 D Option (right to buy) 20.5500 2030-01-22 Common Stock 9000 9000 D Restricted Stock Units 0.0000 Restricted Stock Units 767 767 D Restricted Stock Units 0.0000 Restricted Stock Units 5204 5204 D Restricted Stock Units 0.0000 Restricted Stock Units 6675 6675 D These options vest in three equal annual installments beginning one year after the 01/22/2020 date of grant. 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. These restricted stock units vest in three equal installments beginning one year after 01/18/2023 date of grant. These restricted stock units vest in three equal installments beginning one year after 02/21/2024 date of grant. David Morris was granted 6,675 restricted stock units that will vest in three equal annual installments on 02/21/2025, 02/21/2026, and 02/21/2027. /s/ David Morris 2024-02-22