BUGH JOHN M sold 58.3% of their position (2.50K shares) of GREAT SOUTHERN BANCORP, INC. on the open market

Open‑market sale worth $169.0K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

BUGH JOHN M

Filed: 4/21/2026ACC: 0001214659-26-004878

InsiderBUGH JOHN MCIK 1712461

→

IssuerGREAT SOUTHERN BANCORP, INC.CIK 854560

Other

Since Nov 2018

-2.50K

Net shares

Net seller

$169.0K

Total sold

Open market trades

0B · 1S

Total transactions

2.50K acquired · 5K disposed

Non-Derivative Transactions2

Common stock

Direct

M · Option Exercise

+2.50K

Price / share

$41.30

Trade value

$103.25K

% of position

139.7%

4/20/2026

1.79K→4.29K

Common stock

Direct

S · Sale

−2.50K

Price / share

$67.59

Trade value

$168.97K

% of position

58.3%

4/20/2026

4.29K→1.79K

Total

Net shares

+0.00

Net value

-$65.72K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common stock Direct	4/20/2026	M · Option Exercise	+2.50K	$41.30	$103.25K	139.7%	1.79K	4.29K
Common stock Direct	4/20/2026	S · Sale	−2.50K	$67.59	$168.97K	58.3%	4.29K	1.79K
Total			+0.00		-$65.72K

Derivative Transactions1

Common stock

Direct

M · Option Exercise

Converts to

Common stock

2.50K shares

−2.50K

Strike price

41.3

Held after

0.00

Exercisable

—

4/20/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Common stock Direct	Common stock2.50K shares	4/20/2026	M · Option Exercise	−2.50K	41.3	—	0.00

Non-Derivative Holdings (Post-Transaction)1

Common stock

Indirect

Shares owned4.81K

Total

4.81K indirect4.81K

Security Title	Shares Owned	Ownership Type
Common stock	4.81K	Indirect
Total	4.81K	4.81K indirect

Derivative Holdings (Post-Transaction)9

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

2.80K

Shares owned

2.80K

Exercise price

52.2

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

3.50K

Shares owned

6.30K

Exercise price

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.75K

Shares owned

19.35K

Exercise price

57.98

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.80K

Shares owned

24.15K

Exercise price

61.55

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.80K

Shares owned

28.95K

Exercise price

53.22

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.50K

Shares owned

14.60K

Exercise price

41.74

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.80K

Shares owned

38.55K

Exercise price

57.29

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

3.80K

Shares owned

10.10K

Exercise price

60.15

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.80K

Shares owned

33.75K

Exercise price

61.79

Expiration

—

Exercise window

—

Total

Underlying

38.55K

Owned

178.55K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Option to purchase Direct	Common stock	52.2	—	—	2.80K	2.80K
Option to purchase Direct	Common stock	55	—	—	3.50K	6.30K
Option to purchase Direct	Common stock	57.98	—	—	4.75K	19.35K
Option to purchase Direct	Common stock	61.55	—	—	4.80K	24.15K
Option to purchase Direct	Common stock	53.22	—	—	4.80K	28.95K
Option to purchase Direct	Common stock	41.74	—	—	4.50K	14.60K
Option to purchase Direct	Common stock	57.29	—	—	4.80K	38.55K
Option to purchase Direct	Common stock	60.15	—	—	3.80K	10.10K
Option to purchase Direct	Common stock	61.79	—	—	4.80K	33.75K
Total					38.55K	178.55K