FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Bass Dean O.
2. Date of Event Requiring Statement (Month/Day/Year)
05/03/2018
3. Issuer Name and Ticker or Trading Symbol
Spirit of Texas Bancshares, Inc. [STXB]
(Last)
(First)
(Middle)
1836 SPIRIT OF TEXAS WAY
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chairman and CEO
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

CONROE, TX 77301
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 149,292
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Options (right to buy)   (1) 11/17/2018 Common Stock 50,000 $ 10 D  
Employee Stock Options (right to buy)   (1) 08/18/2021 Common Stock 29,048 $ 10.5 D  
Employee Stock Options (right to buy)   (1) 06/01/2022 Common Stock 10,000 $ 12 D  
Employee Stock Options (right to buy)   (1) 03/21/2023 Common Stock 15,000 $ 13 D  
Employee Stock Options (right to buy)   (2) 02/20/2024 Common Stock 25,000 $ 13 D  
Employee Stock Options (right to buy)   (3) 02/19/2025 Common Stock 15,000 $ 16 D  
Employee Stock Options (right to buy)   (4) 05/26/2026 Common Stock 25,000 $ 13 D  
Employee Stock Options (right to buy)   (5) 02/23/2027 Common Stock 15,000 $ 15 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Bass Dean O.
1836 SPIRIT OF TEXAS WAY
CONROE, TX 77301
  X     Chairman and CEO  

Signatures

/s/ Michael L. Durham, Attorney-in-Fact 05/03/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The options are fully vested and currently exercisable.
(2) Four fifths of the options vested in equal installments on February 20, 2015, 2016, 2017 and 2018, and the remaining one fifth of the options will vest on February 20, 2019.
(3) Three fifths of the options vested in equal installments on February 19, 2016, 2017 and 2018, and the remaining two fifths of the options will vest in equal installments on February 19, 2019 and 2020.
(4) One fifth of the options vested on May 26, 2017, and the remaining four fifths of the options will vest in equal installments on May 26, 2018, 2019, 2020 and 2021.
(5) One fifth of the options vested on February 23, 2018, and the remaining four fifths of the options will vest in equal installments on February 23, 2019, 2020, 2021 and 2022.

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