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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Bugh John M
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)
Vice President of Subsidiary
(Last)          (First)          (Middle)

CARE OF GREAT SOUTHERN BANK, 218 S. GLENSTONE AVE
3. Date of Earliest Transaction (MM/DD/YYYY)

5/12/2021
(Street)

SPRINGFIELD, MO 65802
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 5/12/2021  M  3500 A$16.81 5290 D  
Common stock 5/12/2021  S  3500 D$55.9273 1790 D  
Common stock         2503 (1)I 401(k) Plan 

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Option to purchase $16.81 5/12/2021  M     3500   (2)9/26/2021 Common stock 5317 $16.81 1817 D  
Option to purchase $24.82            (3)11/28/2022 Common stock 1500  3317 D  
Option to purchase $29.64            (4)12/18/2023 Common stock 1500  4817 D  
Common stock $32.59            (5)10/15/2024 Common stock 1750  6567 D  
Common stock $50.71            (6)11/18/2025 Common stock 1750  8317 D  
Common stock $41.3            (7)10/24/2026 Common stock 2500  10817 D  
Option to purchase $52.2            (8)11/15/2027 Common stock 2800  13617 D  
Option to purchase $55            (9)11/28/2028 Common stock 3500  17117 D  
Option to purchase $60.15            (10)11/20/2029 Common stock 3800  20917 D  
Option to purchase $41.74            (11)10/26/2030 Common stock 4500  25417 D  

Explanation of Responses:
(1) Reflects reporting person's holdings of units in Issuer's common stock fund under Issuer's 401(k) plan. Number of shares shown as beneficially owned under the plan represents the approximate equivalent number of shares of Issuer's common stock.
(2) 317 shares vest on 09/26/2014 and 2,500 shares vest on 09/26/2015 and 09/26/2016
(3) 375 shares vest on 11/28/2014, 11/28/2015, 11/28/2016 and 11/28/2017
(4) 375 shares vest on 12/18/2015, 12/18/2016, 12/18/2017 and 12/18/2018
(5) 438 shares vest on 10/15/2016 and 10/15/2017, and 437 shares vest on 10/15/2018 and 10/15/2019
(6) 438 shares vest on 11/18/2017 and 11/18/2018, and 437 shares vest on 11/18/2019 and 11/18/2020
(7) 625 shares vest on 10/24/2018, 10/24/2019, 10/24/2020 and 10/24/2021
(8) 700 shares vest on 11/15/2019, 11/15/2020, 11/15/2021 and 11/15/2022
(9) 875 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023
(10) 950 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024
(11) 1,125 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Bugh John M
CARE OF GREAT SOUTHERN BANK
218 S. GLENSTONE AVE
SPRINGFIELD, MO 65802



Vice President of Subsidiary

Signatures
Matt Snyder, Attorney-in-fact for John M. Bugh5/12/2021
**Signature of Reporting PersonDate

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