UNITED STATES SECURITIES AND EXCHANGE COMMISSION For the transition period from to Washington, D.C. 20549 Commission File Number 001-38293 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 SCPHARMACEUTICALS INC. (Exact name of registrant as specified in its Charter) (State or other jurisdiction of incorporation or ...