TURNER WILLIAM V

Filed: 11/20/2025ACC: 0001214659-25-017005

InsiderTURNER WILLIAM VCIK 1044043

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IssuerGREAT SOUTHERN BANCORP, INC.CIK 854560

Director

Since Oct 2018

+7.80K

Net shares

Net buyer

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

7.80K acquired

Non-Derivative Transactions0

No non-derivative transactions reported

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)2

Common stock

Direct

Shares owned199.11K

Common stock

Indirect

Shares owned8.79K

Total

199.11K direct·8.79K indirect207.90K

Security Title	Shares Owned	Ownership Type
Common stock	199.11K	Direct
Common stock	8.79K	Indirect
Total	207.90K	199.11K direct·8.79K indirect

Derivative Holdings (Post-Transaction)9

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

—

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

Shares owned

13.80K

Exercise price

41.3

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

72.45K

Exercise price

61.79

Expiration

—

Exercise window

—

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

26.80K

Exercise price

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

—

Total

Underlying

64.65K

Owned

378.50K

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