144 0001740419 XXXXXXXX LIVE 0000916907 SOUTHERN MISSOURI BANCORP, INC. 000-23406 2991 OAK GROVE RD. POPLAR BLUFF MO 63901 5737781804 Richard Windes Officer Common Stock Ameriprise Financial Services, LLC

1525 E. Republic Rd, Suite B115 Springfield MO 65804

2000 135180 11013997 05/21/2026 NASDAQ Common Stock 05/01/2026 Stock Option Exercise (1) Issuer N 2000 05/01/2026 cash Y (1) Shares acquired upon cash exercise of stock options pursuant to the issuer's omnibus incentive plan. Shares issued pursuant to an effective Form S-8 registration statement. 05/21/2026 /s/ Richard A. Windes