[Form 4] GREAT SOUTHERN BANCORP, INC. Insider Trading Activity

Rhea-AI Filing Summary

Great Southern Bancorp (GSBC)10/14/2025, an automatic dividend reinvestment plan (DRIP) purchase added 124 shares of common stock at $61.0699 per share, held indirectly through his spouse, bringing indirect beneficial ownership to 17,764 shares.

The filing also details stock options. On 11/19/2025, Carlson received options to purchase a total of 2,000 GSBC shares at an exercise price of $57.29 per share, split into four grants of 500 shares each, with exercisability beginning between 11/19/2027 and 11/19/2030 and expiring on 11/19/2035. Including earlier grants with exercise prices ranging from $41.30 to $61.79, he now directly holds options on 20,000 shares of GSBC common stock.

11/20/2025 - 04:35 PM

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^*

CARLSON THOMAS J

(Last) (First) (Middle)

CARE OF GREAT SOUTHERN BANK

218 S. GLENSTONE AVE

(Street)

SPRINGFIELD MO 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)
10/14/2025

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)
			Code	V	Amount	(A) or (D)	Price
Common stock								100	D
Common stock	10/14/2025		J(1)	V	124	A	$61.0699	17,764	I	Spouse

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	$57.29	11/19/2025		A		500		11/19/2027	11/19/2035	Common stock	500	$57.29	500	D
Option to purchase	$57.29	11/19/2025		A		500		11/19/2028	11/19/2035	Common stock	500	$57.29	1,000	D
Option to purchase	$57.29	11/19/2025		A		500		11/19/2029	11/19/2035	Common stock	500	$57.29	1,500	D
Option to purchase	$57.29	11/19/2025		A		500		11/19/2030	11/19/2035	Common stock	500	$57.29	2,000	D
Option to purchase	$41.3							(2)	10/24/2026	Common Stock	2,000		4,000	D
Option to purchase	$52.2							(3)	11/15/2027	Common Stock	2,000		6,000	D
Option to purchase	$55							(4)	11/28/2028	Common stock	2,000		8,000	D
Option to purchase	$60.15							(5)	11/20/2029	Common stock	2,000		10,000	D
Option to purchase	$41.74							(6)	10/26/2030	Common stock	2,000		12,000	D
Option to purchase	$57.98							(7)	11/17/2031	Common stock	2,000		14,000	D
Option to purchase	$61.55							(8)	11/16/2032	Common stock	2,000		16,000	D
Option to purchase	$53.22							(9)	11/15/2033	Common stock	2,000		18,000	D
Option to purchase	$61.79							(10)	11/20/2034	Common stock	2,000		20,000	D

Explanation of Responses:

1. DRIP acquisition exempt from Section 16 reporting being reported voluntarily

2. 500 shares vest on 10/24/2018, 10/24/2019, 10/24/2020 and 10/24/2021

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

4. 500 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023

5. 500 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024

6. 500 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025

7. 500 shares vest on 11/17/2023, 11/17/2024, 11/17/2025 and 11/17/2026

8. 500 shares vest on 11/16/2024, 11/16/2025, 11/16/2026 and 11/16/2027

9. 500 shares vest on 11/15/2025, 11/15/2026, 11/15/2027 and 11/15/2028

10. 500 shares vest on 11/20/2026, 11/20/2027, 11/20/2028 and 11/20/2029

Remarks:

	Matt Snyder, by Power of Attorney from Thomas J. Carlson	11/20/2025
	** 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.