Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Under Section 13 or 15(d) of the Securities Exchange Act of 1934 for the quarterly period ended September 30, 2023 ☐ Transition Report Under Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from _____ to _____. Commission File Number: 001-37939 MARKER THERAPEUTICS, INC. (Name of registrant in its charter) DELAWARE 45-4497941 (State or other jurisdiction o ...