Sec Form 4 Filing - TURNER JOSEPH W @ GREAT SOUTHERN BANCORP, INC. - 2021-01-12

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 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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1. Name and Address of Reporting Person TURNER JOSEPH 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) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) President/CEO (Last) (First) (Middle) CARE OF GREAT SOUTHERN BANK, 218 S. GLENSTONE AVE 3. Date of Earliest Transaction (MM/DD/YY) 01/12/2021 (Street) SPRINGFIELD, MO65802 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 137,382 D Common stock 2,478 I Spouse Common stock 01/12/2021 J( 1 ) V 14 A $ 51.33 10,834 I Children's Trust Common stock 14,983 ( 2 ) I 401(k) Plan Common stock 369,738 I LTD Family Partnership

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 $ 29.64 ( 3 ) 12/18/2023 Common stock 6,000 6,000 D Option to purchase $ 32.59 ( 4 ) 10/15/2024 Common stock 6,000 12,000 D Option to purchase $ 50.71 ( 5 ) 11/18/2025 Common Stock 6,000 18,000 D Option to purchase $ 41.3 ( 6 ) 10/24/2026 Common Stock 6,000 24,000 D Option to purchase $ 52.2 ( 7 ) 11/15/2027 Common Stock 6,000 30,000 D Option to purchase $ 55 ( 8 ) 11/28/2028 Common Stock 7,000 37,000 D Option to purchase $ 60.15 ( 9 ) 11/20/2029 Common stock 7,000 44,000 D Option to purchase $ 41.74 ( 10 ) 10/26/2030 Common stock 7,500 51,500 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other TURNER JOSEPH W CARE OF GREAT SOUTHERN BANK 218 S. GLENSTONE AVE SPRINGFIELD, MO65802 X X President/CEO Signatures Matt Snyder, Attorney-in-fact for Joseph W. Turner 02/12/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )DRIP acquisition exempt from Section 16 reporting being reported voluntarily. ( 2 )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. ( 3 )1,500 shares vest on 12/18/2015, 12/18/2016, 12/18/2017 and 12/18/2018 ( 4 )1,500 shares vest on 10/15/2016, 10/15/2017, 10/15/2018 and 10/15/2019 ( 5 )1,500 shares vest on 11/18/2017, 11/18/2018, 11/18/2019 and 11/18/2020 ( 6 )1,500 shares vest on 10/24/2018, 10/24/2019, 10/24/2020 and 10/24/2021 ( 7 )1,500 shares vest on 11/15/2019, 11/15/2020, 11/15/2021 and 11/15/2022 ( 8 )1,750 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023 ( 9 )1,750 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024 ( 10 )1,875 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025

Reminder: Report on a separate line for each class of securities beneficially own ed directly or indirectly.

* 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).

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