Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Stefan Chkautovich, CFO April 21, 2025 (573) 778-1800 SOUTHERN MISSOURI BANCORP REPORTS PRELIMINARY RESULTS FOR THIRD QUARTER OF FISCAL 2025; DECLARES QUARTERLY DIVIDEND OF $0.23 PER COMMON SHARE; CONFERENCE CALL SCHEDULED FOR TUESDAY, APRIL 22, AT 8:30 AM CENTRAL TIME Poplar Bluff, Missouri - Southern Missouri Bancorp, Inc. ("Company") (NASDAQ: SMBC), the parent corporation of Southern Bank ("Bank"), today announced preliminary net income for the third quarter of ...