{"url_path":"/sec/colau/10-q/2026/item-6","section_key":"item-6","section_title":"Item 6 Exhibits.","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-14","source_url":"https://www.sec.gov/Archives/edgar/data/2028201/0001213900-26-056577-index.html","accession_number":"0001213900-26-056577","cik":"0002028201","ticker":"COLA","issuer_name":"Columbus Acquisition Corp/Cayman Islands","edgar_url":"https://www.sec.gov/Archives/edgar/data/2028201/0001213900-26-056577-index.html","primary_entity_key":"0002028201","primary_entity_name":"Columbus Acquisition Corp/Cayman Islands"},"word_count":361,"has_tables":true,"body_markdown":"Item\n6. Exhibits.\n\n \n\nExhibit No.\n \nDescription\n\n3.1\n \n[First Amended and Restated Memorandum and Articles of Association, effective on January 22, 2025. (incorporated herein by reference to Exhibit 3.1 to Form 8-K as filed with the Securities and Exchange Commission on January 28, 2025)](http://www.sec.gov/Archives/edgar/data/2028201/000121390025007548/ea022873901ex3-1_columbus.htm)\n\n4.1\n \n[Rights Agreement, dated January 22, 2025, between the Registrant and Continental Stock Transfer & Trust Company, as rights agent. (incorporated herein by reference to Exhibit 4.1 to Form 8-K as filed with the Securities and Exchange Commission on January 28, 2025)](http://www.sec.gov/Archives/edgar/data/2028201/000121390025007548/ea022873901ex4-1_columbus.htm)\n\n10.1\n \n[Target Extension Promissory Note dated May 5, 2026, issued by the Company to WISeSat.Space Corp. (incorporated herein by reference to Exhibit 10.1 to Form 8-K as filed with the Securities and Exchange Commission on May 11, 2026)](http://www.sec.gov/Archives/edgar/data/2028201/000121390026054549/ea029006801ex10-1.htm)\n\n31.1*\n \n[Certification of Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](ea029006601ex31-1.htm)\n\n31.2*\n \n[Certification of Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](ea029006601ex31-2.htm)\n\n32.1**\n \n[Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](ea029006601ex32-1.htm)\n\n32.2**\n \n[Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](ea029006601ex32-2.htm)\n\n101.INS\n \nInline XBRL Instance Document.\n\n101.SCH\n \nInline XBRL Taxonomy Extension\nSchema Document.\n\n101.CAL\n \nInline XBRL Taxonomy Extension\nCalculation Linkbase Document.\n\n101.DEF\n \nInline XBRL Taxonomy Extension\nDefinition Linkbase Document.\n\n101.LAB\n \nInline XBRL Taxonomy Extension\nLabel Linkbase Document.\n\n101.PRE\n \nInline XBRL Taxonomy Extension\nPresentation Linkbase Document.\n\n104\n \nCover Page Interactive\nData File (formatted as Inline XBRL and contained in Exhibit 101)\n\n \n\n*\nFiled herewith.\n\n \n\n**\nFurnished.\n\n \n\n27\n\n \n\n \n\nSIGNATURES\n\n \n\nPursuant\nto the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by\nthe undersigned thereunto duly authorized.\n\n \n\n \nCOLUMBUS\nACQUISITION CORP\n\n \n \n \n\nDate: May 14, 2026\nBy: \n/s/ Fen “Eric”\nZhang \n\n \n \nFen “Eric”\nZhang\n\n \n \nChief Executive Officer\n\n \n \n \n\nDate: May 14, 2026\nBy:\n/s/ Jie “Janet”\nHu\n\n \n \nJie “Janet”\nHu\n\n \n \nChief Financial Officer\n\n \n\n28"}