Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Spirit of Texas Bancshares, Inc. (the “Company”) for the quarter ended September 30, 2020 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

 

(1)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

 

(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date:     October 30, 2020

 

By:

/s/ Allison S. Johnson

 

 

 

Allison S. Johnson

 

 

 

Interim Chief Financial Officer and Chief Accounting Officer