Table of Contents FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 As filed with the U.S. Securities and Exchange Commission on December 23, 2025. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Archimedes Tech SPAC Partners III Co. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) Cayman Islands 6770 N/A (Primary Standard Industrial Classification Code Number) (I.R.S. Employer I ...