UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-42474 Ribbon Acquisition Corporation (Exact Name of Registrant as Specified in Its Charter) Cayman Islands N/A (State or other jurisdiction of incorp ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-42474 Ribbon Acquisition Corporation (IRS Employer Identification No.) Central Park Tower LaTour Shinjuku Room 3001 6-15-1 Nishi Shinjuku, Shinjuku-ku To ...