UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 401 Professional Drive, Suite 260 Gaithersburg, MD 2 ...