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): January 6, 2025 Y-MABS THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38650 47-4619612 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 230 Park Avenue Suite 3350 New York, New Yo ...