UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 For the transition period from ________ to ________. Commission File No.: 001-39468 Panbela Therapeutics, Inc. (Exact Name of Registrant as Specified in its Charter) (State or other jurisdiction of incorporation or organization) 712 Vista Blvd #305, Waconia, Minnesota 55387 (Mark One) ...