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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	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* COPELAND REX A (Last) (First) (Middle) CARE OF GREAT SOUTHERN BANK 218 S. GLENSTONE AVE (Street) SPRINGFIELD MISSOURI 65802 (City) (State) (Zip) UNITED STATES (Country)	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 X Officer (give title below) X Other (specify below) Treasurer Senior Vice Pres of Subsidiary
	2a. Foreign Trading Symbol
	3. Date of Earliest Transaction (Month/Day/Year) 04/30/2026	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person
	4. If Amendment, Date of Original Filed (Month/Day/Year)

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	04/30/2026		M		2,036	A	$52.2	26,707	D
Common stock	04/30/2026		S		2,036	D	$68.25	24,671	D
Common stock	05/01/2026		M		1,250	A	$52.2	25,921	D
Common stock	05/01/2026		M		914	A	$52.2	26,835	D
Common stock	05/01/2026		S		914	D	$68.77	25,921	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Option to purchase	$52.2	04/30/2026		M			2,036	(1)	11/15/2027	Common Stock	2,036	$52.2	2,164	D
Option to purchase	$52.2	05/01/2026		M			1,250	(1)	11/15/2027	Common Stock	1,250	$52.2	914	D
Option to purchase	$52.2	05/01/2026		M			914	(1)	11/15/2027	Common Stock	914	$52.2	0	D
Option to purchase	$55							(2)	11/28/2028	Common stock	4,200		4,200	D
Option to purchase	$60.15							(3)	11/20/2029	Common stock	4,200		8,400	D
Option to purchase	$41.74							(4)	10/26/2030	Common stock	4,500		12,900	D
Option to purchase	$57.98							(5)	11/17/2031	Common stock	4,750		17,650	D
Option to purchase	$61.55							(6)	11/16/2032	Common stock	4,800		22,450	D

Explanation of Responses:

1. 1,050 shares vest on 11/15/2019, 11/15/2020, 11/15/2021 and 11/15/2022

2. 1,050 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023

3. 1,050 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024

4. 1,125 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025

5. 1,188 shares vest on 11/17/2023 and 11/17/2024 and 1,187 shares vest on 11/17/2025 and 11/17/2026

6. 1,200 shares vdst on 11/16/2024, 11/16/2025, 11/16/2026 and 11/16/2027

Remarks:

	Matt Snyder, by Power of Attorney from Rex A Copeland	05/01/2026
	** 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.
* Form 4: SEC 1474 (03-26)