<div id="readability-page-1"><div><p><span>Maples Mark A Officer of Subsidiary of Great Southern Bancorp Inc [GSBC] filed a Form 4 on December 1, 2025 with the Securities and Exchange Commission disclosing the following changes in ownership:</span></p><div><table><tbody><tr><th><span>Date</span></th><th><span>Transaction</span></th><th><span>Shares</span></th><th><span>Price</span></th><th><span>Value</span></th></tr><tr><td><span>11/25/25</span></td><td><span>Exercise(1)</span></td><td><span>1,450</span></td><td><span>$51.24</span></td><td><span>$74,299</span></td></tr><tr><td><span>11/25/25</span></td><td><span>Sale</span></td><td><span>1,450</span></td><td><span>$59.93</span></td><td><span>$86,899</span></td></tr></tbody></table></div><p><span>Ending Holdings: 0 - Direct</span></p><div><table><tbody><tr><td><span>(1)</span></td><td><span>1,200 shares exercised 8.0 years before expiration date.</span></td></tr><tr><td><span> </span></td><td><span>250 shares exercised 4.9 years before expiration date.</span></td></tr></tbody></table></div><p><span>For a free trial, or to learn more about our insider trading analysis and data services, please visit http://www.washingtonservice.com or contact us at (301) 913-5100 or send an email to info@washingtonservice.com.</span></p><p><span>Founded in 1970, The Washington Service provides securities professionals with financial, economic and public policy research and data.</span></p><span> </span></div></div>

GSBC

<p>Mark A. Maples, an officer of Great Southern Bancorp Inc, sold 1,450 shares worth $86,899 after exercising options. His ending holdings are now zero. The transaction was disclosed in a Form 4 filed with the SEC on December 1, 2025.</p>

Unit Officer Maples Sells 1,450 ($86.9K) Of Great Southern Bancorp Inc [GSBC]