Fortress Biotech(FBIO) - Prospectus

As filed with the Securities and Exchange Commission on December 15, 2025 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 FORTRESS BIOTECH, INC. (Exact name of registrant as specified in its charter) Delaware 20-5157386 (State or other jurisdiction of incorporation or organization) 1111 Kane Concourse, Suite 301 Bay Harbor Islands, FL 33154 (Address, including zip code, and telephone number, includ ...