Cabaletta Bio(CABA) - 2025 Q4 - Annual Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 For the fiscal year ended December 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-39103 CABALETTA BIO, INC. (Exact name of Registrant as specified in its Charter) Delaware 82-1685768 (State or other jurisdiction of incorporation or organization) 2929 Arch Street, Suite 600 Philadelphia, PA 19104 (I.R.S. Employer Identific ...