Great Southern Bancorp, Inc.

GSBC·NASDAQ·$71.32Share Price as of 11/2·$777MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/07/26 10-QQ1 ended 03/31/2605/07/26 10-KFY 202503/06/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report10/22/26 8-KCurrent report09/16/26 8-KCurrent report07/16/26 8-KCurrent report06/17/26 8-KCurrent report05/15/26

Prospectuses and Registrations

S-8Registration of securities for employees06/12/26 S-8Registration of securities for employees06/17/22 424B5Prospectus supplement06/11/20 FWPFree writing prospectus06/10/20 424B5Prospectus supplement06/08/20

Proxies

DEF 14ADefinitive proxy03/31/26 DEFA14AAdditional proxy materials03/31/26 DEF 14ADefinitive proxy03/27/25 DEFA14AAdditional proxy materials03/27/25 DEF 14ADefinitive proxy03/28/24

Ownership

144Proposed sale of securities09/04/26 Form 4Insider transaction08/20/26 Form 4Insider transaction08/18/26 Form 4Insider transaction08/18/26 Form 4Insider transaction08/18/26

Other

ARSAnnual report to shareholders03/31/26 ARSAnnual report to shareholders03/27/25 ARSAnnual report to shareholders03/28/24 ARSAnnual report to shareholders03/31/23 305B2305B206/08/20