RF Acquisition(RFAMU) - Prospectus(update)

As filed with the Securities and Exchange Commission on January 29, 2026 Registration No. 333-290947 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 4 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 RF Acquisition Corp III Michael J. Blankenship Winston & Strawn LLP 800 Capitol Street Suite 2400 Houston, Texas 77002 Tel: (713) 651-2600 (Exact name of registrant as specified in its charter) Cayman Islands 6770 N/A (State or other jurisdiction of incor ...