Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Stefan Chkautovich, CFO April 29, 2024 (573) 778-1800 SOUTHERN MISSOURI BANCORP REPORTS PRELIMINARY RESULTS FOR THIRD QUARTER OF FISCAL 2024; DECLARES QUARTERLY DIVIDEND OF $0.21 PER COMMON SHARE; CONFERENCE CALL SCHEDULED FOR TUESDAY, APRIL 30, AT 9:30AM 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 ...