FIRST US BANCSHARES, INC.

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

Filed by the Registrant ☒ Filed by a party other than the Registrant ☐

Check the appropriate box:

(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:

We will hold the 2025 Annual Meeting of Shareholders of First US Bancshares, Inc. (the “Company”) at 10:00 a.m., Central Time, on Thursday, May 1, 2025. This year we will be conducting the annual meeting online via live webcast in order to allow our shareholders and other attendees to participate from any location. Details regarding how to participate in the virtual annual meeting and the business to be conducted are more fully described in the accompanying notice of the annual meeting and proxy statement.

We have enclosed a notice of the meeting, a proxy statement, a proxy card and the Annual Report to Shareholders for 2024 and hope that you will study the enclosed materials carefully and participate in the virtual meeting.

Whether or not you plan to participate in the meeting, please complete, sign and date the enclosed proxy card and return it as promptly as possible. You may return the proxy card by mail in the accompanying envelope, or you may vote your shares via the internet or by telephone. Please review the instructions on each of these options in the proxy statement and on your proxy card. You may revoke your proxy by voting during the meeting, by signing and delivering a later-dated proxy card, by giving written notice of revocation to the Secretary of the Company or by a later vote via the internet or by telephone at any time before the proxy is voted.

Sincerely,

James F. House Chairperson of the Board President and Chief Executive Officer

Robert Stephen Briggs Lead Independent Director Vice Chairperson of the Board

March 27, 2025

3291 U.S. Highway 280

Birmingham, Alabama 35243

(205) 582-1200

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

TO THE SHAREHOLDERS OF FIRST US BANCSHARES, INC.:

First US Bancshares, Inc. (the “Company”) will hold its 2025 Annual Meeting of Shareholders (the “Annual Meeting”) in a virtual format via live webcast on Thursday, May 1, 2025, at 10:00 a.m., Central Time, for the following purposes:

The Board of Directors of the Company has fixed the close of business on March 12, 2025, as the record date for the determination of shareholders entitled to notice of and to vote at the Annual Meeting. A complete list of the shareholders of the Company will be available and open for examination by any shareholder of the Company during ordinary business hours beginning April 21, 2025.

All shareholders are cordially invited to participate in the virtual Annual Meeting. You will be able to attend the Annual Meeting online and submit your questions during the meeting by visiting https://meetnow.global/MZ6SKCF. In order to participate, you will need the control number included on your Notice of Internet Availability of Proxy Materials or proxy card if you request a hard copy of the proxy materials. Information about the Annual Meeting, including further instructions on how to participate in the Annual Meeting, can be found at the following website: www.edocumentview.com/FUSB.

Whether or not you plan to participate during the Annual Meeting, you are requested to complete, sign and date the enclosed proxy card and send it promptly by mail in the envelope provided for this purpose, or vote your shares via the internet or by telephone using the instructions provided in the proxy statement and on your proxy card. The proxy may be revoked by voting during the Annual Meeting, by signing and delivering a later-dated proxy card, by giving written notice of revocation to the Secretary of the Company or by a later vote via the internet or by telephone at any time prior to the voting thereof.

By Order of the Board of Directors,

Beverly J. Dozier

Corporate Secretary

Birmingham, Alabama

March 27, 2025

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE VIRTUAL ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON MAY 1, 2025: THE COMPANY’S PROXY STATEMENT AND 2024 ANNUAL REPORT ARE AVAILABLE AT www.edocumentview.com/FUSB.

PROXY STATEMENT

TABLE OF CONTENTS

3291 U.S. Highway 280

Birmingham, Alabama 35243

(205) 582-1200

PROXY STATEMENT

FOR THE

2025 ANNUAL MEETING OF SHAREHOLDERS

TO BE HELD ON MAY 1, 2025