X0508 4 2023-06-09 1 0001499422 RBB Bancorp RBB 0001711516 Lin Feng 1055 WILSHIRE BLVD SUITE 1200 LOS ANGELES CA 90017 1 Former Director 0 Common Stock, No Par Value 485425 D Option (right to buy) 13.2098 2024-05-21 Common Stock 10250 10250 D Option (right to buy) 17.0800 2025-05-20 Common Stock 10000 10000 D Option (right to buy) 18.2500 2026-05-17 Common Stock 10000 10000 D These options vest in three equal annual installments beginning one year after the 05/21/2014 date of grant. These options vest in three equal annual installments beginning one year after the 05/20/2015 date of grant. These options vest in three equal annual installments beginning one year after the 05/17/2016 date of grant. /s/ Lin Feng 2023-09-08