UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K For the transition period from __________ to ___________ Commission file number: 1-42521 ARTIUS II ACQUISITION INC. (Exact name of registrant as specified in its charter) Cayman Islands 98-1802901 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification Number) (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended Decemb ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-42521 ARTIUS II ACQUISITION INC. (Exact Name of Registrant as Specified in Its Charter) Cayman Islands 98-1802901 (State or other jurisdi ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-42521 ARTIUS II ACQUISITION INC. (Exact Name of Registrant as Specified in Its Charter) Cayman Islands 98-1802901 (State or other jurisdiction ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (I.R.S. Employer Identification No.) 3 Columbus Circle, Suite 1609 New York, NY 10019 (Address of principal executive offices) (212) 309-7668 For the transition period from to Commission file number: 1 ...

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on February 7, 2025. Registration No. 333-283020 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 5 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 Numbe ...

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 ...

TABLE OF CONTENTS 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) 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 Cayman Islands 6770 98-1802901 (Primary Standard Industrial Classification Code Number) (I. ...

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on November 27, 2024. Registration No. 333-283020 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 2 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) | Caymall Islands | | --- | | and the country of the county of the county of the county of | (State or other jurisdiction of incorporation or organizatio ...

ARTIUS II ACQUISITION INC. TABLE OF CONTENTS As filed with the Securities and Exchange Commission on November 18, 2024. Registration No. 333-283020 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 1 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Chief Executive Officer and Chief Financial Officer 3 Columbus Circle, Suite 1609 (Exact name of registrant as specified in its charter) | Caymall Islands | | --- | | and the country of the county of the coun ...

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on November 6, 2024. Registration No. 333- (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) Boon Sim Chief Executive Officer and Chief Financial Officer 3 Columbus Circle, Suite 1609 New York, NY 10019 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARTIUS II ACQUISITION INC. (Exact ...