Great Southern (NASDAQ: GSBC) director reports indirect sale and option grants

Rhea-AI Filing Summary

Great Southern Bancorp, Inc. director Thomas J. Carlson reported an indirect sale of company stock. On February 3, 2026, 680 shares of common stock were sold at $63.17 per share, held indirectly through his spouse, leaving 17,206 indirectly owned shares.

Separately, he holds 100 common shares directly. The filing also lists a series of stock options to purchase a total of 18,000 shares at exercise prices between $41.74 and $61.79, with vesting schedules running from 2019 through 2030.

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^*

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)
02/03/2026

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	02/03/2026		S		680	D	$63.17	17,206	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	$52.2							(1)	11/15/2027	Common Stock	2,000		2,000	D
Option to purchase	$55							(2)	11/28/2028	Common stock	2,000		4,000	D
Option to purchase	$60.15							(3)	11/20/2029	Common stock	2,000		6,000	D
Option to purchase	$41.74							(4)	10/26/2030	Common stock	2,000		8,000	D
Option to purchase	$57.98							(5)	11/17/2031	Common stock	2,000		10,000	D
Option to purchase	$61.55							(6)	11/16/2032	Common stock	2,000		12,000	D
Option to purchase	$53.22							(7)	11/15/2033	Common stock	2,000		14,000	D
Option to purchase	$61.79							(8)	11/20/2034	Common stock	2,000		16,000	D
Option to purchase	$57.29							(9)	11/19/2035	Common stock	2,000		18,000	D

Explanation of Responses:

1. 500 shares vest on 11/15/2019, 11/15/2020, 11/15/2021 and 11/15/2022

2. 500 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023

3. 500 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024

4. 500 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025

5. 500 shares vest on 11/17/2023, 11/17/2024, 11/17/2025 and 11/17/2026

6. 500 shares vest on 11/16/2024, 11/16/2025, 11/16/2026 and 11/16/2027

7. 500 shares vest on 11/15/2025, 11/15/2026, 11/15/2027 and 11/15/2028

8. 500 shares vest on 11/20/2026, 11/20/2027, 11/20/2028 and 11/20/2029

9. 500 shares vest on 11/19/2027, 11/19/2028, 11/19/2029 and 11/19/2030

Remarks:

	Matt Snyder, by Power of Attorney from Thomas J. Carlson	02/04/2026
	** 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 Thomas J. Carlson report?

Thomas J. Carlson reported an indirect sale of 680 shares of Great Southern Bancorp common stock. The shares, held through his spouse, were sold on February 3, 2026 at $63.17 per share, as disclosed in the Form 4 filing.

How many GSBC shares does Thomas J. Carlson own after this Form 4?

After the reported transaction, Thomas J. Carlson reports indirect beneficial ownership of 17,206 Great Southern Bancorp shares through his spouse. He also reports direct ownership of 100 common shares, according to the holdings section of the Form 4 insider trading report.

Was the GSBC stock sold directly by Thomas J. Carlson or indirectly?

The 680 Great Southern Bancorp shares were reported as held indirectly through Carlson’s spouse. The Form 4 classifies the transaction as indirect ownership with “Spouse” noted as the nature of ownership, rather than as directly held shares by the director himself.

What price and date applied to the GSBC insider stock sale?

The reported insider sale occurred on February 3, 2026, at a price of $63.17 per Great Southern Bancorp share. This applies specifically to the 680 indirectly held common shares sold, as detailed in Table I of the Form 4 filing.

What stock options does Thomas J. Carlson hold in Great Southern Bancorp?

Carlson holds options to purchase 18,000 Great Southern Bancorp shares across several grants. Exercise prices range from $41.74 to $61.79, with expiration dates between November 15, 2027 and November 19, 2035 and vesting in 500-share installments each year.

How are Carlson’s GSBC stock options structured over time?

Each option grant covers 2,000 shares, vesting in four annual installments of 500 shares. Vesting dates span from 2019 through 2030, while expiration dates run from November 15, 2027 to November 19, 2035, as explained in the Form 4 footnotes.