As filed with the Securities and Exchange Commission on December 19, 2025 Registration No. 333-290947 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 RF Acquisition Corp III (Exact name of registrant as specified in its charter) Cayman Islands 6770 N/A (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial (I.R.S. Employer Identification Number) RF Acquisition Corp ...

As filed with the Securities and Exchange Commission on October 17, 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 RF Acquisition Corp III (Exact name of registrant as specified in its charter) Cayman Islands 6770 N/A (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) Michael J. Blankenship Winston & Strawn LLP 800 Capito ...