TABLE OF CONTENTS As filed with the Securities and Exchange Commission on January 29, 2025. Registration No. 333-283020 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 3 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) (State or other jurisdiction of incorporation or organization) Cayman Islands 6770 98-1802901 (Primary Standard Industrial Classification Code Number) (I. ...