SEC Form 3

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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1. Name and Address of Reporting Person* McGuire David M (Last) (First) (Middle) 1836 SPIRIT OF TEXAS WAY (Street) CONROE TX 73301 (City) (State) (Zip)	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 ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) President	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

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	120,475	D

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: 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)	08/16/2019	Common Stock	50,000	$10	D
Employee Stock Options (right to buy)	(1)	08/18/2021	Common Stock	19,524	$10.5	D
Employee Stock Options (right to buy)	(1)	06/01/2022	Common Stock	15,000	$12	D
Employee Stock Options (right to buy)	(1)	03/21/2023	Common Stock	20,000	$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

Explanation of Responses:

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.

Remarks:

	/s/ Michael L. Durham, Attorney-in-Fact	05/03/2018
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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