As filed with the Securities and Exchange Commission on July 29, 2025. Registration No. 333-284880 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 4 to the FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Nukkleus Inc. (Exact name of registrant as specified in its charter) Delaware 6770 38-3912845 (State or jurisdiction of (Primary Standard Industrial (I.R.S. Employer incorporation or organization) Classification Code Number) Identification Number) 575 F ...