FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 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 * MARRS DOUGLAS W   2. Issuer Name and Ticker or Trading Symbol GREAT SOUTHERN BANCORP, INC. [GSBC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) Secretary / Vice President of Subsidiary (Last) (First) (Middle) CARE OF GREAT SOUTHERN BANK, 218 S. GLENSTONE AVE 3. Date of Earliest Transaction (Month/Day/Year) 10/24/2017 (Street) SPRINGFIELD 65802 4. If Amendment, Date 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 (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common stock 10/24/2017   M   625 A $ 32.59 2,531 D   Common stock 10/24/2017   S   625 D $ 54.6795 1,906 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Option to purchase

$ 24.82

(1)

11/28/2022

Common stock

625

625

D

Option to purchase

$ 29.64

(2)

12/18/2023

Common stock

1,250

1,875

D

Option to purchase

$ 32.59

10/24/2017

M

625

(3)

10/15/2024

Common Stock

1,250

$ 32.59

3,125

D

Option to purchase

$ 50.71

(4)

11/18/2025

Common Stock

2,500

5,625

D

Option to purchase

$ 41.3

(5)

10/24/2026

Common Stock

2,500

8,125

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MARRS DOUGLAS W CARE OF GREAT SOUTHERN BANK 218 S. GLENSTONE AVE SPRINGFIELD 65802			Secretary	Vice President of Subsidiary

Signatures

Matt Snyder, Attorney-in-fact for Douglas W. Marrs		10/25/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	625 shares vest on 11/28/2017
(2)	625 shares vest on 12/18/2017 and 12/18/2018
(3)	625 Shares vest on 10/15/2017, 10/15/2018 and 10/15/2019
(4)	625 shares vest on 11/18/2017, 11/18/2018, 11/18/2019 and 11/18/2020
(5)	625 shares vest on 10/24/2018, 10/24/2019, 10/24/2020 and 10/24/2021

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