Columbus Acquisition Corp/Cayman Islands — Form 8-K

Columbus Acquisition Corp (CAC) and related parties executed an Amended and Restated Registration Rights Agreement dated October 1, 2026, governing registration of securities in connection with the business combination with WISeSat.Space Holdings Corp (Pubco). The agreement grants CAC Investors the right to register 1,658,732 Pubco Ordinary Shares (received in exchange for CAC founder shares, private units, and working capital units) and Exchange Investors the right to register Exchange Shares received by WISeKey International Holdings Limited (Seller) and other insiders. Key provisions: up to 2 demand registrations per investor class, piggy-back registration rights, short-form registration rights, and Pubco obligation to bear registration expenses (capped at $30,000 for investor counsel per registration). The agreement replaces the First Amended and Restated Registration Agreement from November 9, 2025.