X0609 4 2026-05-13 0001499422 RBB Bancorp RBB 0001185980 LEE JOHNNY C false 1055 WILSHIRE BLVD SUITE 1200 LOS ANGELES CA 90017 1 1 President/CEO 0 Common Stock, No Par Value 14669 D Restricted Stock Units 0.0000 Common Stock 1098 1098 D Restricted Stock Units 0.0000 Common Stock 5500 5500 D Restricted Stock Units 0.0000 Common Stock 2740 2740 D Performance Stock Units 0.0000 Common Stock 12332 12332 D Restricted Stock Units 0.0000 Common Stock 8712 8712 D Performance Stock Units 0.0000 Common Stock 19602 19602 D Performance Stock Units 0.0000 Common Stock 14683 14683 D Restricted Stock Units 0.0000 Common Stock 9789 9789 D These remaining restricted stock units vest on 07/20/2026. There will be no expiration date once restricted stock units vest. These remaining restricted stock units vest on 02/21/2027. These remaining stock units vest on 03/20/2027. These performance stock units ("PSUs") will vest conditionally on the achievement of certain performance goals and an employment condition. The reported PSUs will vest at the expiration of a three-year period beginning on 03/20/2024 subject to the Reporting Person's satisfaction of the employment condition. These remaining restricted stock units vest in two equal annual installments on 05/08/2027 and 05/08/2028. Performance Stock Units ("PSUs") to vest conditionally on the achievement of certain performance goals and an employment condition. The PSUs are awarded at a target level and have the opportunity to vest at 150% of such target level; The reported PSUs represent the maximum award that may be achieved and ultimately vest. The reported PSUs will vest at the expiration of a three-year period beginning on 05/08/2025 subject to the Reporting Person's satisfaction of the employment condition. Performance Stock Units ("PSUs") to vest conditionally on the achievement of certain performance goals and an employment condition. The PSUs are awarded at a target level and have the opportunity to vest at 150% of such target level; The reported PSUs represent the maximum award that may be achieved and ultimately vest. The reported PSUs will vest at the expiration of a three-year period beginning on 05/13/2026 subject to the Reporting Person's satisfaction of the employment condition These restricted stock units vest in three equal annual installments beginning one year after the 05/13/2026 date of grant. Restricted Stock Units (RSUs) and a maximum Performance Stock Units (PSUs) were granted on May 13, 2026. /s/ Johnny Lee 2026-05-15