GREAT SOUTHERN BANCORP, INC.

In the normal course of business, the Company and its subsidiaries are subject to pending and threatened legal actions, some of which seek substantial relief or damages. While the ultimate outcome of such legal proceedings cannot be predicted with certainty, after reviewing pending and threatened litigation with counsel, management currently believes that the outcome of such litigation will not have a material adverse effect on the Company’s business, financial condition or results of operations.

One litigation matter in which the Bank is defendant was previously set for trial in the third quarter of 2025. The trial was postponed and has not yet been rescheduled. The court required the plaintiffs to file an amended petition, which they did in October 2025. The Bank has responded to the amended petition by filing a motion to dismiss on various grounds. The plaintiffs allege a breach of

fiduciary duty in this matter. At this stage of the proceeding, it is not possible to predict the outcome. However, the Bank believes it will prevail in this matter, and further believes that any loss should be indemnified, in whole or in part, or shared by others.