Columbus Acquisition Corp/Cayman Islands

We are a blank check company incorporated in the Cayman Islands on January 18, 2024 as an exempted company with limited liability (meaning that our public shareholders have no liability, as shareholders of our company, for the liabilities of our company over and above the amount paid for their shares). We were formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities, which we refer to as a “target business.” Our efforts to identify a prospective target business will not be limited to a particular industry or geographic location. We do not have any specific business combination under consideration and we have not (nor has anyone on our behalf), directly or indirectly, contacted any prospective target business or had any substantive discussions, formal or otherwise, with respect to such a transaction. Additionally, we have not engaged or retained any agent or other representative to identify or locate any suitable acquisition candidate, to conduct any research or take any measures, directly or indirectly, to locate or contact a target business. As a blank check company incorporated for the purpose of effecting a business combination, we have significant ties to China. Dr. Fen “Eric” Zhang, our Chief Executive Officer, who is also the sole member and sole director of our sponsor, is a Canadian citizen but currently resides in China for

1. 15-12G filingOct 23, 2026
2. SCHEDULE 13G/A - filed by Harraden Circle Investments, LLC regarding Columbus Acquisition Corp/Cayman IslandsOct 8, 2026
3. Entry into a Material Definitive Agreement · Completion of Acquisition or Disposition of Assets · Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing · Material Modification to Rights of Security Holders · Changes in Control of Registrant · Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · Amendments to Articles of Incorporation or Bylaws; Change in Fiscal YearOct 7, 2026
4. Submission of Matters to a Vote of Security Holders · Regulation FD DisclosureOct 6, 2026
5. 425 filingOct 2, 2026