GREAT SOUTHERN BANCORP, INC. — Director's Dealing 2021

May 10, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GREAT SOUTHERN BANCORP, INC. (GSBC)
CIK: 0000854560
Period of Report: 2021-05-10

Reporting Person: MARRS DOUGLAS W (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-10	Common stock	M	625	$50.71	Acquired	1625	Direct
2021-05-10	Common stock	M	700	$52.2	Acquired	2325	Direct
2021-05-10	Common stock	M	875	$55.00	Acquired	3200	Direct
2021-05-10	Common stock	S	2200	$58.0005	Disposed	1000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-10	Option to purchase	$50.71	M	625	Disposed	2025-11-18	Common Stock (625)	Direct
2021-05-10	Option to purchase	$52.2	M	700	Disposed	2027-11-15	Common Stock (2100)	Direct
2021-05-10	Option to purchase	$55	M	875	Disposed	2028-11-28	Common Stock (3500)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common stock	792	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Option to purchase	$41.3	2026-10-24	Common Stock (625)	625	Direct
Option to purchase	$60.15	2029-11-20	Common stock (3800)	8450	Direct
Option to purchase	$41.74	2030-10-26	Common stock (4500)	12950	Direct

Footnotes

F1: Reflects reporting person's holdings of units in Issuer's common stock fund under Issuer's 401(k) plan. Number of shares shown as beneficially owned under the plan represents the approximate equivalent number of shares of Issuer's common stock.

F2: 625 shares vest on 11/18/2020

F3: 625 shares vest on 10/24/2021

F4: 700 shares vest on 11/15/2020, 11/15/2021 and 11/15/2022

F5: 875 shares vest on 11/28/2020, 11/28/2021, 11/28/2022 and 11/28/2023

F6: 950 shares vest on 11/20/2021, 11/20/2022, 11/20/2023 and 11/20/2024

F7: 1,125 shares vest on 10/26/2022, 10/26/2023, 10/26/2024 and 10/26/2025