RBB Bancorp

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. )

Check the appropriate box:

RBB BANCORP

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

To Our Shareholders:

On behalf of the Board of Directors (the “Board”) of RBB Bancorp (the “Company”), we are pleased to invite you to participate in the 2025 annual meeting of the Company’s shareholders (the “Annual Meeting”), which will be held on Wednesday, May 21, 2025 at 11:00 a.m., Pacific Time in person at Royal Business Bank Corporate Headquarters, 1055 Wilshire Blvd., Suite 1200, Los Angeles, California 90017, with options to also participate via live webcast or telephonically, using the instructions set forth below and in the Proxy Statement.

To participate in the Annual Meeting telephonically, call George Lai at 213-699-2961 anytime in advance of the Annual Meeting, to obtain the Annual Meeting phone number and access code, or to participate in the Annual Meeting via live webcast, access the following website: https://attendee.gotowebinar.com/register/2801328474705259101 and use the proxy control number on your proxy card as the access code, and participate live in the webcast.

At the Annual Meeting, you will be asked to elect eleven (11) directors, each for a one-year term or until their successors are elected and qualified, to approve, on a non-binding advisory basis, the compensation of the Company’s named executive officers (“NEOs”) and to ratify the appointment of Crowe LLP as the Company’s independent auditor for the fiscal year ending December 31, 2025.

The Board has determined that each of the proposals that will be presented to the shareholders for consideration at the Annual Meeting are in the best interests of the Company and its shareholders, and unanimously recommends and urges you to vote “FOR” each director nominee, “FOR” the approval, on a non-binding advisory basis, of the compensation of the Company’s NEOs and “FOR” ratification of Crowe LLP as the Company’s independent auditor for the fiscal year ending December 31, 2025. If any other business is properly presented at the Annual Meeting, the proxies will be voted in accordance with the recommendations of the Company’s Board of Directors.

Only shareholders of record at the close of business on March 24, 2025 are entitled to notice of and to vote at the Annual Meeting.

We have elected to provide access to our proxy materials by the Internet in accordance with the Securities and Exchange Commission’s “notice and access” rules. Accordingly, on or about April 11, 2025, we will mail to our shareholders a Notice of Internet Availability of Proxy Materials. On the date of mailing, all shareholders of record and beneficial owners will have the ability to access our proxy materials at the website address set forth in the Notice of Internet Availability of Proxy Materials and in the accompanying Proxy Statement. These proxy materials will be available free of charge. We are constantly focused on improving ways our shareholders can access information about the Company and believe that providing our proxy materials by the Internet increases the ability of our shareholders to access the information they need while simultaneously reducing the cost and materials of the Annual Meeting.

Your vote is very important. Whether or not you expect to attend the Annual Meeting in person or participate telephonically or via a live webcast, we encourage you to cast your vote via the Internet, by phone or if you prefer, by completing, signing, and returning your proxy card in the accompanying return envelope. Specific instructions for voting via the Internet or by phone are stated on the proxy card and in the enclosed Proxy Statement. If you hold your shares of the Company’s common stock through an account with a brokerage firm, bank, or other nominee, please follow the instructions you receive from them to vote your shares. Your cooperation is appreciated since a majority of the outstanding shares of the Company’s common stock must be represented, either in person or by proxy, for us to transact business at the Annual Meeting.

Each proxy is revocable and will not affect your right to vote in person if you participate in the Annual Meeting. If you hold your shares in certificate form and participate in the Annual Meeting telephonically or via a live webcast, you may simply revoke your previously submitted proxy and vote your shares at that time. If your shares are held by a broker or otherwise not registered in your name, you will need additional documentation from your record holder to vote your shares telephonically or via the Internet at the Annual Meeting. If you hold your shares in certificate form, please indicate on the proxy whether or not you expect to participate in the Annual Meeting telephonically or via the live webcast.

We look forward to seeing or hearing from you at the Annual Meeting.

Sincerely yours,

/s/ David R. Morris

David R. Morris

Chief Executive Officer

1055 Wilshire Blvd., Suite 1200, Los Angeles, CA 90017

April 11, 2025

NOTICE OF 2025 ANNUAL MEETING OF SHAREHOLDERS

To Be Held May 21, 2025** **

TO THE SHAREHOLDERS OF RBB BANCORP:

The 2025 Annual Meeting of Shareholders (the “Annual Meeting”) of RBB Bancorp (the “Company”) will be held on Wednesday, May 21, 2025 at 11:00 a.m., Pacific Time in person at Royal Business Bank Corporate Headquarters, 1055 Wilshire Blvd., Suite 1200, Los Angeles, California 90017, with options to participate telephonically and via a live webcast. You will be able to participate in the Annual Meeting (1) telephonically by calling George Lai at 213-699-2961 anytime in advance of the Annual Meeting to obtain the Annual Meeting phone number and access code, or (2) by accessing the following website: https://attendee.gotowebinar.com/register/2801328474705259101 and using the proxy control number on your proxy card as the access code, and participating live in the webcast.

The proxy materials for this Annual Meeting, which consist of the Proxy Statement and the Annual Report on Form 10-K for the year ended December 31, 2024 are available free of charge at the Company’s website at https://ir.rbbusa.com/financial-information/sec-filings.

At the Annual Meeting, you will be asked to consider and vote on the following matters:

Nominations for election of members of the Board of Directors of the Company may be made by the Board of Directors or by any shareholder of any outstanding class of capital stock of the Company entitled to vote for the election of directors. Notice of intention to make any nominations (other than for persons named in this Notice of 2025 Annual Meeting of Shareholders (this“Notice”)) shall be made in writing and shall be delivered to the Chief Executive Officer of the Company by the close of business on April 30, 2025, which is twenty-one (21) days prior to the Annual Meeting. Such notification shall contain the following information to the extent known to the notifying shareholder: (a) the name and address of each proposed nominee; (b) the principal occupation of each proposed nominee; (c) the number of shares of capital stock of the Company owned by each proposed nominee; (d) the name and residence address of the notifying shareholder; (e) the number of shares of capital stock of the Company owned by the notifying shareholder; (f) with the written consent of the proposed nominee, a copy of which shall be furnished with the notification, whether the proposed nominee has ever been convicted of or pleaded nolo contendere to any criminal offence involving dishonesty or breach of trust, filed a petition in bankruptcy, or been adjudged bankrupt. The notice shall be signed by the nominating shareholder and by the nominee. Nominations not made in accordance with this paragraph shall be disregarded by the chair of the Annual Meeting, and upon his instructions, the inspectors of election shall disregard all votes cast for each such nominee. The restrictions set forth in this paragraph shall not apply to nomination of a person to replace a proposed nominee who has died or otherwise become incapacitated to serve as a director between the last day for giving notice hereunder and the date of election of directors if the procedure called for in this paragraph was followed with respect to the nomination of the proposed nominee.

IMPORTANT: Whether or not you expect to participate in the Annual Meeting, we urge you to vote your proxy at your earliest convenience via the Internet, by phone or mail by using the enclosed postage-paid reply envelope. This will ensure the presence of a quorum at the Annual Meeting and will save the Company the expense of additional solicitation. Submitting your proxy will not prevent you from voting your shares telephonically or via a live webcast during the Annual Meeting if you desire to do so. Your proxy is revocable at your option in the manner described in the Proxy Statement.