United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q __________________________________________________ (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 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 Number: 000-23661 ROCKWELL MEDICAL, INC. (Exact name of registrant as specified in its c ...