SCHEDULE 13G/A 0001085146-24-005822 0001844495 XXXXXXXX LIVE 1 Class A Ordinary Shares, par value $0.0001 per share 12/31/2025 0002012807 RF Acquisition Corp II G75389109 111 SOMERSET, #05-07 SINGAPORE U0 00000 Rule 13d-1(b) Wealthspring Capital LLC b NY 0 0 0 0 0 N 0 IA PN Matthew Simpson b X1 0 0 0 0 0 N 0 HC IA IN RF Acquisition Corp II 111 SOMERSET, #05-07, SINGAPORE, SINGAPORE 00000 Wealthspring Capital LLC Matthew Simpson 2 WESTCHESTER PARK DRIVE SUITE 108 WEST HARRISON, New York 10604 Wealthspring Capital LLC - NEW YORK Matthew Simpson - UNITED STATES N IA HC 0 0 Wealthspring Capital LLC - 0 Matthew Simpson - 0 Wealthspring Capital LLC - 0 Matthew Simpson - 0 Wealthspring Capital LLC - 0 Matthew Simpson - 0 Wealthspring Capital LLC - 0 Matthew Simpson - 0 N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with all other Reporting Persons (as such term is defined in the Schedule 13G referred to below) on behalf of each of them a statement on Schedule 13G (including amendments thereto, if any) with respect to the ordinary shares of RF Acquisition Corp II, and that this Agreement may be included as an Exhibit to such joint filing. Each of the undersigned agrees to be responsible for the timely filing of the Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate. IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of January 8, 2026. Wealthspring Capital LLC /s/ Matthew Simpson Name: Matthew Simpson Title: Manager /s/ Matthew Simpson Name: Matthew Simpson Wealthspring Capital LLC /s/ Matthew Simpson 01/08/2026 Matthew Simpson /s/ Matthew Simpson 01/08/2026