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 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ____ to _____ Commission File No. 001-34600 TENAX THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 26-2593535 (State or other jur ...