UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023. ☐ TRANSITION REPORT UNDER SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______ to ________ Commission File No. 000-30152 USIO, INC. (Exact name of registrant as specified in its charter) Nevada 98-0190072 (State or other jurisdiction of incorp ...