Great Southern Bancorp (GSBC) CEO sells 6,000 shares after option exercise

Rhea-AI Filing Summary

Great Southern Bancorp President/CEO Joseph W. Turner, also a director and 10% owner, reported several equity transactions. On January 26, 2026, he exercised options for 6,000 shares of common stock at $41.30 per share and on the same day sold 6,000 shares at $60.7378 per share, leaving 137,382 shares held directly.

The filing also shows an 18‑share dividend reinvestment purchase on January 13, 2026 for a children's trust at $62.785 per share, plus indirect holdings of common stock through a spouse, a 401(k) plan, and an LTD family partnership, as well as multiple unexercised stock option grants vesting through future years.

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^*

TURNER JOSEPH W

(Last) (First) (Middle)

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)
01/13/2026

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	01/26/2026		M		6,000	A	$41.3	143,382	D
Common stock	01/26/2026		S		6,000	D	$60.7378	137,382	D
Common stock								2,478	I	Spouse
Common stock	01/13/2026		J(1)	V	18	A	$62.785	11,378	I	Children's Trust
Common stock								18,335	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	$41.3	01/26/2026		M			6,000	(2)	10/24/2026	Common Stock	6,000	$41.3	0	D
Option to purchase	$52.2							(3)	11/15/2027	Common Stock	6,000		6,000	D
Option to purchase	$55							(4)	11/28/2028	Common Stock	7,000		13,000	D
Option to purchase	$60.15							(5)	11/20/2029	Common stock	7,000		20,000	D
Option to purchase	$41.74							(6)	10/26/2030	Common stock	7,500		27,500	D
Option to purchase	$57.98							(7)	11/17/2031	Common stock	7,750		35,250	D
Option to purchase	$61.55							(8)	11/16/2032	Common stock	7,800		43,050	D
Option to purchase	$53.22							(9)	11/15/2033	Common Stock	7,800		50,850	D
Option to purchase	$61.79							(10)	11/20/2034	Common stock	7,800		58,650	D
Option to purchase	$57.29							(11)	11/19/2035	Common stock	7,800		66,450	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

11. 1,950 shares vest on 11/19/2027, 11/19/2028, 11/19/2029 and 11/19/2030

Remarks:

	Matt Snyder, by Power of Attorney from Joseph W. Turner	01/27/2026
	** 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.
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FAQ

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

He exercised 6,000 stock options at $41.30 and sold 6,000 common shares at $60.7378 on January 26, 2026. He also reported an 18‑share dividend reinvestment purchase for a children’s trust on January 13, 2026 at $62.785 per share.

How many GSBC shares does Joseph W. Turner hold directly after these trades?

After the January 26, 2026 option exercise and sale, Joseph W. Turner directly holds 137,382 shares of Great Southern Bancorp common stock. This direct holding figure is reported in the Form 4 as the amount beneficially owned following the reported transactions.

Did the GSBC CEO sell more shares than he acquired through options?

No. On January 26, 2026, he acquired 6,000 shares of common stock via option exercise at $41.30 per share and sold 6,000 shares at $60.7378 per share. The sale quantity matches the option shares acquired that day.

What indirect GSBC share holdings are reported for Joseph W. Turner?

The filing lists indirect ownership of 2,478 common shares through a spouse, 11,378 shares through a children’s trust, 18,335 shares in a 401(k) plan, and 369,738 shares through an LTD family partnership, in addition to his directly held shares and stock options.

What stock options does the GSBC CEO hold after the reported transactions?

The Form 4 shows multiple “option to purchase” awards on Great Southern Bancorp common stock, with individual grants ranging from 6,000 to 7,800 underlying shares and expiration dates from October 2026 through November 2035, indicating ongoing long‑term equity incentives.

What does the January 13, 2026 GSBC children’s trust transaction represent?

On January 13, 2026, an indirect transaction coded “J(1)” records 18 GSBC common shares acquired for a children’s trust at $62.785 per share. The footnote explains this as a dividend reinvestment plan acquisition reported on a voluntary, exempt basis under Section 16.