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

Rhea-AI Filing Summary

Great Southern Bancorp, Inc. (GSBC)10/14/2025, he acquired 59 shares of common stock through a dividend reinvestment plan at $59.9887 per share, bringing his directly owned common stock to 11,481 shares. The filing also lists multiple "option to purchase" awards, including four new grants of 500 options each at an exercise price of $57.29, exercisable beginning 11/19/2025 and expiring on 11/19/2035, with vesting in annual 500-share increments from 2019 through 2029. After the reported transactions, he holds 18,000 stock options directly.

11/20/2025 - 04:40 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^*

Pitt Douglas M

(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	10/14/2025		J(1)	V	59	A	$59.9887	11,481	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	$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	2,000		10,000	D
Option to purchase	$57.98							(6)	11/17/2031	Common stock	2,000		12,000	D
Option to purchase	$61.55							(7)	11/16/2032	Common stock	2,000		14,000	D
Option to purchase	$53.22							(8)	11/15/2033	Common stock	2,000		16,000	D
Option to purchase	$61.79							(9)	11/20/2034	Common stock	2,000		18,000	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 10/26/2022, 10/26/2023, 10/26/2024 and 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 Douglas M. Pitt	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 transaction did GSBC director Douglas M. Pitt report?

Douglas M. Pitt, a director of Great Southern Bancorp, Inc. (GSBC), reported acquiring 59 shares of common stock on 10/14/2025 through a dividend reinvestment plan.

At what price were the newly acquired GSBC shares purchased?

The 59 GSBC shares were acquired at a price of $59.9887 per share under a dividend reinvestment plan transaction described as a voluntary Section 16 report.

How many GSBC common shares does the reporting person own after this Form 4?

Following the reported transaction, the director beneficially owns 11,481 shares of GSBC common stock in direct ownership.

What stock options are disclosed for the GSBC director in this Form 4?

The filing lists several "option to purchase" awards, including new grants of 500 options each at $57.29 with an expiration date of 11/19/2035, plus earlier awards at exercise prices such as $52.20, $55, $60.15, $41.74, $57.98, $61.55, $53.22, and $61.79, tied to various future expiration dates.

How many GSBC stock options does the reporting person hold after the transactions?

After the reported transactions, the director holds a total of 18,000 stock options for GSBC common stock in direct ownership.

What do the vesting schedules in the GSBC Form 4 explanation section describe?

The explanation shows that groups of 500 options vest annually on specific dates, with series covering years such as 2019–2022, 2020–2023, 2021–2024, 2022–2025, 2023–2026, 2024–2027, 2025–2028, and 2026–2029.

Who signed the GSBC Form 4 filing on behalf of the reporting person?

The Form 4 was signed by Matt Snyder, acting under a power of attorney for Douglas M. Pitt, on 11/20/2025.