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

Rhea-AI Filing Summary

Great Southern Bancorp, Inc. (GSBC)10/14/2025, 56 shares of common stock were acquired through a dividend reinvestment plan at $60.1181 per share into children's accounts, reported as indirect ownership. After this transaction, she reports 32,896 common shares held directly, 7,757 shares held indirectly in children's accounts, and 369,738 shares held indirectly through an LTD family partnership. The filing also lists multiple stock option grants to purchase GSBC common stock, with exercise prices ranging from $41.74 to $61.79 and a total of 16,500 options held directly, vesting across various dates and expiring as late as 2035.

11/20/2025 - 04:55 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

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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^*

BROWN JULIE A

(Last) (First) (Middle)

CARE OF GREAT SOUTHERN BANK

218 S. GLENSTONE AVENUE

(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								32,896	D
Common stock	10/14/2025		J(1)	V	56	A	$60.1181	7,757	I	Children's Accounts
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		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	$52.2							(2)	11/15/2027	Common Stock	2,000		4,000	D
Option to purchase	$55							(3)	11/28/2028	Common stock	2,000		6,000	D
Option to purchase	$60.15							(4)	11/20/2029	Common stock	2,000		8,000	D
Option to purchase	$41.74							(5)	10/26/2030	Common stock	500		8,500	D
Option to purchase	$57.98							(6)	11/17/2031	Common stock	2,000		10,500	D
Option to purchase	$61.55							(7)	11/16/2032	Common stock	2,000		12,500	D
Option ot purchase	$53.22							(8)	11/15/2033	Common Stock	2,000		14,500	D
Option to purchase	$61.79							(9)	11/20/2034	Common stock	2,000		16,500	D

Explanation of Responses:

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

2. 500 shares vest on 11/15/2019, 11/15/2020, 11/15/2021 and 11/15/2022

3. 500 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023

4. 500 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024

5. 500 shares vest on 10/26/2025

6. 500 shares vest on 11/17/2023, 11/17/2024, 11/17/2025 and 11/17/2026

7. 500 shares vest on 11/16/2024, 11/16/2025, 11/16/2026 and 11/16/2027

8. 500 shares vest on 11/15/2025, 11/15/2026, 11/15/2027 and 11/15/2028

9. 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 Julie A. Brown	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 did GSBC director Julie A. Brown report in this Form 4?

The director reported a small dividend reinvestment plan acquisition of 56 GSBC common shares on 10/14/2025 into children's accounts and updated totals for her directly and indirectly held common stock and stock options.

How many Great Southern Bancorp (GSBC) shares does the director own after this transaction?

After the reported transaction, the director reports 32,896 GSBC common shares held directly, 7,757 shares held indirectly in children's accounts, and 369,738 shares held indirectly through an LTD family partnership.

What price was paid for the newly acquired GSBC shares?

The 56 GSBC common shares acquired on 10/14/2025 through the dividend reinvestment plan were reported at a price of $60.1181 per share.

What stock options does the GSBC director hold according to this filing?

The filing lists several options to purchase GSBC common stock with exercise prices between $41.74 and $61.79, covering a total of 16,500 option shares held directly, with various vesting schedules and expirations extending to 2035.

Is this GSBC Form 4 filing related to a Rule 10b5-1 trading plan?

The form includes a checkbox for transactions under a Rule 10b5-1 plan, but the excerpt does not indicate that this box was checked for the reported transactions.

What does the explanation section say about the 56 GSBC shares acquired?

The explanation notes that the 56-share dividend reinvestment plan acquisition is exempt from Section 16 reporting and is being reported voluntarily.