SEC FORM 4

SEC FORM 4 SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

TURNER WILLIAM V

(Last)

(First)

(Middle)

CARE OF GREAT SOUTHERN BANK

218 S GLENSTONE AVE

(Street)

SPRINGFIELD

65802

(City)

(State)

(Zip)

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	10% Owner
	Officer (give title below)	Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/28/2026

4. 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 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common stock	01/28/2026		M		6,000	A	$41.3	205,112	D
Common stock	01/28/2026		S		6,000	D	$59.6979	199,112	D
Common stock								8,897⁽¹⁾	I	401(k) Plan

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 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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Option to purchase	$41.3	01/28/2026		M			6,000	⁽²⁾	10/24/2026	Common Stock	6,000	$41.3	0	D
Option to purchase	$52.2							⁽³⁾	11/15/2027	Common Stock	6,000		6,000	D
Option to purchase	$55							⁽⁴⁾	11/28/2028	Common Stock	7,000		13,000	D
Option to purchase	$60.15							⁽⁵⁾	11/20/2029	Common stock	7,000		20,000	D
Option to purchase	$41.74							⁽⁶⁾	10/26/2030	Common stock	7,500		27,500	D
Option to purchase	$57.98							⁽⁷⁾	11/17/2031	Common stock	7,750		35,250	D
Option to purchase	$61.55							⁽⁸⁾	11/16/2032	Common stock	7,800		43,050	D
Option to purchase	$53.22							⁽⁹⁾	11/15/2033	Common stock	7,800		50,850	D
Option to purchase	$61.79							⁽¹⁰⁾	11/20/2034	Common stock	7,800		58,650	D
Option to purchase	$57.29							⁽¹¹⁾	11/19/2035	Common stock	7,800		66,450	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. 1,500 shares vest on 10/24/2018, 10/24/2019, 10/24/2020 and 10/24/2021

3. 1,500 shares vest on 11/15/2019, 11/15/2020, 11/15/2021 and 11/15/2022

4. 1,750 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023

5. 1,750 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024

6. 1,875 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025

7. 1,938 shares vest on 11/17/2023 and 11/17/2024, and 1,937 shares vest on 11/17/2025 and 11/17/2026

8. 1,950 shares vest on 11/16/2024, 11/16/2025, 11/16/2026 and 11/16/2027

9. 1,950 shares vest on 11/15/2025, 11/15/2026, 11/15/2027 and 11/15/2028

10. 1,950 shares vest on 11/20/2026, 11/20/2027, 11/20/2028 and 11/20/2029

11. 1,950 shares vest on 11/19/2027, 11/19/2028, 11/19/2029 and 11/19/2030

Remarks:

	Matt Snyder, by Power of Attorney from William V. Turner	01/29/2026
	** 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 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Director Turner William V exercised 6,000 shares at a strike of $41.30 and sold $358,187 worth of shares (6,000 units at $59.70) (SEC Form 4)