UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-36818 TRACON Pharmaceuticals, Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 34-2037594 (State or Other Jurisdiction of (I.R.S. Employer Incorporation or Organ ...