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 ...