Exhibit 99.1
Catherine Thian
5196 Parkway Calabasas
Calabasas, CA 91302
March 13, 2023
Dr. James Kao
Chairman of the Board
RBB Bancorp
1055 Wilshire Blvd., Suite 1200
Los Angeles, CA 90017
Dear Dr. Kao, Board Chairman,
Due to my health reasons, I regret to inform you that I have decided to resign from my Board of Director positions of RBB Bancorp and RBB Bank as well as all roles related to RBB Bancorp and RBB Bank immediately (3/13/2023).
Best regards,
![a01.jpg](https://capedge.com/proxy/8-K/0001437749-23-006465/a01.jpg)
Catherine Thian