Westchester Capital Management Reports 7.77% Stake in Ribbon Acquisition Corporation

On May 15, 2026, Westchester Capital Management, LLC, filed a Schedule 13G reporting a new 7.77% stake in Ribbon Acquisition Corporation (RIBB). The filing was made jointly with Westchester Capital Partners, LLC, Virtus Investment Advisers, LLC, and The Merger Fund. Westchester Capital Management reported beneficial ownership of 372,417 Class A ordinary shares. Within the group, Virtus Investment Advisers, LLC reported 344,981 shares (7.20%), and The Merger Fund reported 250,715 shares (5.23%). The reporting persons serve as investment advisers or sub-advisers to various funds that hold these shares for the benefit of their investors. The filing indicates that the shares were acquired in the ordinary course of business and not for the purpose of changing or influencing the control of the issuer. The ownership percentage is based on 4,793,446 shares outstanding as of March 31, 2026. This initial filing marks a significant new position for the group in the Tokyo-based company.