Management Change/Compensation (Form 8-K)

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On April 1, 2026, Dr. Christopher Lin, Ph.D, a current member of the Board of Directors (the "Board") of RBB Bancorp (the "Company") and the Board of Directors (the "Bank Board") of Royal Business Bank, advised the Board Chair that he will be retiring from the Board and the Bank Board effective as of the Company's 2026 Annual Meeting of Shareholders (the "Annual Meeting"), and as such, will not stand for re-election as a member of the Board at the Annual Meeting. Dr. Lin currently serves as a member of the Board's Audit Committee, Directors Loan Committee and Community Reinvestment Act Committee, and will retire from those roles when he retires from the Board. Dr. Lin's decision to retire did not involve any disagreement with Company management, the Board or the Bank Board on any matter relating to the Company's operations, policies or practices.