TABLE OF CONTENTS As filed with the Securities and Exchange Commission on February 6, 2025. Registration No. 333-283020 (State or other jurisdiction of incorporation or organization) Cayman Islands 6770 98-1802901 (Primary Standard Industrial Classification Code Number) UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 4 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARTIUS II ACQUISITION INC. (Exact name of registrant as specified in its charter) | C ...