SECOND AMENDMENT TO THE FIRST UNITED SECURITY BANK Director Retirement Agreement DATED OCTOBER 17, 2002 FOR LINDA H. BREEDLOVE

EXHIBIT 10.13B

SECOND AMENDMENT

TO THE

FIRST UNITED SECURITY BANK

Director Retirement Agreement

DATED OCTOBER 17, 2002

FOR

LINDA H. BREEDLOVE

THIS SECOND AMENDMENT (this “Amendment”) is adopted and effective as of this 25th day of January, 2017, by and among First US Bancshares, Inc., a Delaware corporation (formerly known as United Security Bancshares, Inc.) (“USB”), First US Bank, a state-chartered commercial bank located in Thomasville, Alabama (formerly known as First United Security Bank) (“FUSB”) (USB and FUSB collectively are referred to herein as the “Company”), and Linda H. Breedlove (the “Director”).

WHEREAS, the Company and the Director previously executed the First United Security Bank Director Retirement Agreement on October 17, 2002, effective as of September 1, 2002, as amended by that certain First Amendment to the First United Security Bank Director Retirement Agreement dated November 20, 2008, effective as of January 1, 2005 (as amended, the “Agreement”); and

WHEREAS, at the annual meeting of the stockholders of USB held on May 9, 2006, the stockholders of USB approved and adopted an amendment to USB’s bylaws to increase the mandatory retirement age for members of USB’s board of directors from age seventy (70) to age seventy-five (75); and

WHEREAS, the Agreement currently provides that the annual benefit thereunder shall increase each Plan Year at a rate at 3.0%, effective as of the end of each such Plan Year; and

WHEREAS, the Company and the Director desire to amend the Agreement to clarify that the annual increases in the amount of the annual benefit payable pursuant to the Agreement shall terminate at the end of the Plan Year immediately preceding the date of the first meeting of stockholders of USB at which directors are elected, following the date on which the Director reaches the mandatory retirement age set forth in USB’s bylaws; and

WHEREAS, capitalized terms used but not defined in this Amendment shall have the respective meanings ascribed to such terms in the Agreement.

NOW, THEREFORE, the Agreement is hereby amended as follows:

Commencing at the end of the first Plan Year, and each Plan Year thereafter until the end of the Plan Year immediately preceding the Mandatory Retirement Date, the annual benefit shall be increased three percent (3.0%) from the previous Plan Year.

IN WITNESS WHEREOF, the Company and the Director hereby consent to the adoption of this Amendment.