As filed with the Securities and Exchange Commission on January 16, 2026. Registration No. 333-291993 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 ______________________________ HELIX ACQUISITION CORP. III (Exact name of registrant as specified in its charter) ______________________________ | Cayman Islands | 6770 | N/A | | --- | --- | --- | | (State or other jurisdict ...

As filed with the Securities and Exchange Commission on December 5, 2025. Registration No. 333-[•] UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ______________________________ HELIX ACQUISITION CORP. III (Exact name of registrant as specified in its charter) ______________________________ | Cayman Islands 6770 N/A | | | | --- | --- | --- | | (State or other jurisdiction of (I.R.S. Employer | | (Primary Standard Indust ...