As filed with the U.S. Securities and Exchange Commission on September 26, 2025 Registration No. 333-290172 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 1 TO FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Skyline Builders Group Holding Limited (Exact Name of Registrant as Specified in its Charter) Not Applicable (Translation of Registrant's Name into English) Cayman Islands 1700 Not Applicable (State or other jurisdiction of incorporation or organiz ...