MAGENTA THERAPEU(MGTA) - 2025 Q4 - Annual Report

(Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 OR Commission File Number: 001-38541 Dianthus Therapeutics, Inc. (Exact name of Registrant as specified in its Charter) Delaware 81-0724163 (State or other jurisdiction of incorpo ...