GSBC officer discloses new stock options and 401(k) holdings

Rhea-AI Filing Summary

Great Southern Bancorp, Inc. (GSBC) vice president of a subsidiary Kevin L. Baker reported new equity awards on a Form 4 dated 11/19/2025. He received four grants of options to purchase common stock, each for 1,200 shares, all with an exercise price of $57.29 and an expiration date of 11/19/2035, bringing his directly held stock options to 38,550 derivative securities after the reported transactions. He also has indirect ownership of approximately 9,560 shares of common stock through the company’s 401(k) plan, where the balance is shown as the equivalent number of shares in the issuer’s common stock fund.

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

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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^*

Baker Kevin L

(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)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Vice President of Subsidiary

3. Date of Earliest Transaction (Month/Day/Year)
11/19/2025

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								14	D
Common Stock								9,560(1)	I	401(k) Plan

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		1,200		11/19/2027	11/19/2035	Common stock	1,200	$57.29	1,200	D
Option to purchase	$57.29	11/19/2025		A		1,200		11/19/2028	11/19/2035	Common stock	1,200	$57.29	2,400	D
Option to purchase	$57.29	11/19/2025		A		1,200		11/19/2029	11/19/2035	Common stock	1,200	$57.29	3,600	D
Option to purchase	$57.29	11/19/2025		A		1,200		11/19/2030	11/19/2035	Common stock	1,200	$57.29	4,800	D
Option to purchase	$52.2							(2)	11/15/2027	Common stock	2,800		7,600	D
Option to purchase	$55							(3)	11/28/2028	Common Stock	3,500		11,100	D
Option to purchase	$60.15							(4)	11/20/2029	Common stock	3,800		14,900	D
Option to purchase	$41.74							(5)	10/26/2030	Common stock	4,500		19,400	D
Option to purchase	$57.98							(6)	11/17/2031	Common stock	4,750		24,150	D
Option to purchase	$61.55							(7)	11/16/2032	Common stock	4,800		28,950	D
Option to purchase	$53.22							(8)	11/15/2033	Common stock	4,800		33,750	D
Option to purchase	$61.79							(9)	11/20/2034	Common stock	4,800		38,550	D

Explanation of Responses:

1. Reflects reporting person's holdings of units in Issuer's common stock fund under Issuer's 401(k) plan. Number of shares shown as beneficially owned under the plan represents the approximate equivalent number of shares of Issuer's common stock.

2. 700 shares vest on 11/15/2019, 11/15/2020, 11/15/2021 and 11/15/2022

3. 875 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023

4. 950 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024

5. 1,125 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025

6. 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

7. 1,200 shares vest on 11/16/2024, 11/16/2025, 11/16/2026 and 11/16/2027

8. 1,200 shares vest on 11/15/2025, 11/15/2026, 11/15/2027 and 11/15/2028

9. 1,200 shares vest on 11/20/2026, 11/20/2027, 11/20/2028 and 11/20/2029

Remarks:

	Matt Snyder, by Power of Attorney from Kevin L. Baker	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.
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FAQ

What insider transaction did GSBC report for Kevin L. Baker on Form 4?

The Form 4 shows that Kevin L. Baker, a vice president of a Great Southern Bancorp subsidiary, received four grants of options to purchase 1,200 shares of common stock each on 11/19/2025, all at an exercise price of $57.29.

How many Great Southern Bancorp (GSBC) options does Kevin L. Baker hold after this filing?

After the reported transactions, Kevin L. Baker beneficially owns 38,550 derivative securities in the form of options to purchase Great Southern Bancorp common stock.

What is the exercise price and expiration date of the new GSBC stock options?

The new options reported for Great Southern Bancorp common stock each have an exercise price of $57.29 and an expiration date of 11/19/2035.

Does Kevin L. Baker have indirect ownership in Great Southern Bancorp (GSBC) shares?

Yes. The filing states he indirectly holds approximately 9,560 shares of Great Southern Bancorp common stock through the issuer’s 401(k) plan via the common stock fund.

What is Kevin L. Baker’s role in relation to Great Southern Bancorp (GSBC)?

Kevin L. Baker is reported as an Officer, serving as a Vice President of a Subsidiary of Great Southern Bancorp, Inc.

Are the reported GSBC holdings in the 401(k) plan exact shares or equivalents?

The filing notes that the 9,560 units reflect holdings in the issuer’s common stock fund under the 401(k) plan and represent the approximate equivalent number of shares of Great Southern Bancorp common stock.