As filed with the U.S. Securities and Exchange Commission on November 14, 2025. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 STAK Inc. 斯塔克工业集团有限公司 (Exact Name of Registrant as Specified in its Charter) Not Applicable (Translation of Registrant's Name into English) | Cayman Islands | 3533 | Not Applicable | | --- | --- | --- | | (State or other jurisdiction of | (Primary Standard Industrial | (I. ...