Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 Commission file number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 43-1524856 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 1451 E. Battlefield, Springfield, Missouri 65804 ...