TURNER JOSEPH W (President/CEO) reported 1 transaction at GREAT SOUTHERN BANCORP, INC.

Review the transaction codes below to understand the nature of each event.

TURNER JOSEPH W

Filed: 11/20/2025ACC: 0001214659-25-017026

InsiderTURNER JOSEPH WCIK 1044047

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IssuerGREAT SOUTHERN BANCORP, INC.CIK 854560

DirectorOfficer10% Owner· President/CEO

Since Aug 2018

+7.82K

Net shares

Net buyer

$1.1K

Total acquired

Open market trades

0B · 0S

Total transactions

7.82K acquired

Non-Derivative Transactions1

Common stock

Indirect

J · J

+19.00

Price / share

$60.30

Trade value

$1.15K

% of position

0.2%

10/14/2025

11.34K→11.36K

Total

Net shares

+19.00

Net value

$1.15K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common stock Indirect	10/14/2025	J · J	+19.00	$60.30	$1.15K	0.2%	11.34K	11.36K
Total			+19.00		$1.15K

Derivative Transactions4

Option to purchase

Direct

A · Award

Converts to

Common stock

1.95K shares

+1.95K

Strike price

57.29

Held after

1.95K

Exercisable

—

11/19/2025

Option to purchase

Direct

A · Award

Converts to

Common stock

1.95K shares

+1.95K

Strike price

57.29

Held after

3.90K

Exercisable

—

11/19/2025

Option to purchase

Direct

A · Award

Converts to

Common stock

1.95K shares

+1.95K

Strike price

57.29

Held after

5.85K

Exercisable

—

11/19/2025

Option to purchase

Direct

A · Award

Converts to

Common stock

1.95K shares

+1.95K

Strike price

57.29

Held after

7.80K

Exercisable

—

11/19/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Option to purchase Direct	Common stock1.95K shares	11/19/2025	A · Award	+1.95K	57.29	—	1.95K
Option to purchase Direct	Common stock1.95K shares	11/19/2025	A · Award	+1.95K	57.29	—	3.90K
Option to purchase Direct	Common stock1.95K shares	11/19/2025	A · Award	+1.95K	57.29	—	5.85K
Option to purchase Direct	Common stock1.95K shares	11/19/2025	A · Award	+1.95K	57.29	—	7.80K

Non-Derivative Holdings (Post-Transaction)4

Common stock

Indirect

Shares owned2.48K

Common stock

Indirect

Shares owned369.74K

Common stock

Indirect

Shares owned18.21K

Common stock

Direct

Shares owned137.38K

Total

137.38K direct·390.43K indirect527.81K

Security Title	Shares Owned	Ownership Type
Common stock	2.48K	Indirect
Common stock	369.74K	Indirect
Common stock	18.21K	Indirect
Common stock	137.38K	Direct
Total	527.81K	137.38K direct·390.43K indirect

Derivative Holdings (Post-Transaction)9

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

7.50K

Shares owned

41.30K

Exercise price

41.74

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

Shares owned

33.80K

Exercise price

60.15

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common Stock

Underlying shares

7.80K

Shares owned

64.65K

Exercise price

53.22

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

7.80K

Shares owned

56.85K

Exercise price

61.55

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common Stock

Underlying shares

Shares owned

13.80K

Exercise price

41.3

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common Stock

Underlying shares

Shares owned

26.80K

Exercise price

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

7.80K

Shares owned

72.45K

Exercise price

61.79

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common Stock

Underlying shares

Shares owned

19.80K

Exercise price

52.2

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

7.75K

Shares owned

49.05K

Exercise price

57.98

Expiration

—

Exercise window

—

Total

Underlying

64.65K

Owned

378.50K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Option to purchase Direct	Common stock	41.74	—	—	7.50K	41.30K
Option to purchase Direct	Common stock	60.15	—	—	7K	33.80K
Option to purchase Direct	Common Stock	53.22	—	—	7.80K	64.65K
Option to purchase Direct	Common stock	61.55	—	—	7.80K	56.85K
Option to purchase Direct	Common Stock	41.3	—	—	6K	13.80K
Option to purchase Direct	Common Stock	55	—	—	7K	26.80K
Option to purchase Direct	Common stock	61.79	—	—	7.80K	72.45K
Option to purchase Direct	Common Stock	52.2	—	—	6K	19.80K
Option to purchase Direct	Common stock	57.98	—	—	7.75K	49.05K
Total					64.65K	378.50K