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

Rhea-AI Filing Summary

Great Southern Bancorp, Inc. (GSBC) President/CEO and director Joseph W. Turner, a 10% owner, reported updated holdings as of a transaction on 10/14/2025. A dividend reinvestment plan purchase added 19 shares of common stock at $60.30 to a Children's Trust account, reported with transaction code J(1) as a voluntary DRIP acquisition.

After this and prior activity, Turner holds 137,382 GSBC common shares directly, plus indirect holdings including 2,478 through his spouse, 11,360 in a Children's Trust, 18,212 in a 401(k) plan, and 369,738 through an LTD family partnership. He also reports a series of employee stock options, including new options to purchase 1,950 shares at $57.29 vesting annually from 2027 through 2030 and expiring on 11/19/2035, along with earlier grants at exercise prices ranging from $41.30 to $61.79 with expirations between 10/24/2026 and 11/20/2034, totaling 72,450 derivative securities beneficially owned.

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
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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 JOSEPH W

(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	X	10% Owner
X	Officer (give title below)		Other (specify below)
	President/CEO

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								137,382	D
Common stock								2,478	I	Spouse
Common stock	10/14/2025		J(1)	V	19	A	$60.3	11,360	I	Children's Trust
Common stock								18,212	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 (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		1,950		11/19/2027	11/19/2035	Common stock	1,950	$57.29	1,950	D
Option to purchase	$57.29	11/19/2025		A		1,950		11/19/2028	11/19/2035	Common stock	1,950	$57.29	3,900	D
Option to purchase	$57.29	11/19/2025		A		1,950		11/19/2029	11/19/2035	Common stock	1,950	$57.29	5,850	D
Option to purchase	$57.29	11/19/2025		A		1,950		11/19/2030	11/19/2035	Common stock	1,950	$57.29	7,800	D
Option to purchase	$41.3							(2)	10/24/2026	Common Stock	6,000		13,800	D
Option to purchase	$52.2							(3)	11/15/2027	Common Stock	6,000		19,800	D
Option to purchase	$55							(4)	11/28/2028	Common Stock	7,000		26,800	D
Option to purchase	$60.15							(5)	11/20/2029	Common stock	7,000		33,800	D
Option to purchase	$41.74							(6)	10/26/2030	Common stock	7,500		41,300	D
Option to purchase	$57.98							(7)	11/17/2031	Common stock	7,750		49,050	D
Option to purchase	$61.55							(8)	11/16/2032	Common stock	7,800		56,850	D
Option to purchase	$53.22							(9)	11/15/2033	Common Stock	7,800		64,650	D
Option to purchase	$61.79							(10)	11/20/2034	Common stock	7,800		72,450	D

Explanation of Responses:

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

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

Remarks:

	Matt Snyder, by Power of Attorney from Joseph W. Turner	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.

FAQ

What insider activity did GSBC President/CEO Joseph W. Turner report?

Joseph W. Turner reported a dividend reinvestment plan (DRIP) acquisition of 19 shares of Great Southern Bancorp common stock at $60.30 on 10/14/2025, credited to a Children's Trust.

How many GSBC shares does Joseph W. Turner own directly and indirectly?

Following the reported transactions, Turner holds 137,382 GSBC common shares directly. Indirectly, he holds 2,478 through his spouse, 11,360 in a Children's Trust, 18,212 in a 401(k) plan, and 369,738 through an LTD family partnership.

What stock options for GSBC does Joseph W. Turner hold?

Turner reports multiple options to purchase GSBC common stock. These include new grants at an exercise price of $57.29 with 1,950 options vesting each year from 11/19/2027 through 11/19/2030 and expiring on 11/19/2035, plus earlier grants with exercise prices between $41.30 and $61.79, expiring from 10/24/2026 to 11/20/2034.

What is the total number of GSBC derivative securities reported by Joseph W. Turner?

The form shows Turner beneficially owning a total of 72,450 derivative securities, consisting of options to purchase Great Southern Bancorp common stock at various exercise prices and expiration dates.

What roles does Joseph W. Turner hold at Great Southern Bancorp (GSBC)?

Joseph W. Turner is identified as a Director, a 10% Owner, and an Officer with the title President/CEO of Great Southern Bancorp, Inc.

How was the DRIP acquisition of GSBC shares characterized in the report?

The 19-share DRIP acquisition at $60.30 was coded as J(1) and described as a DRIP acquisition exempt from Section 16 reporting, being reported on a voluntary basis.