Columbus Acquisition: Notice Of Delisting Or Failure To Satisfy A Continued Listing Rule Or Standard; Transfer Of Listing

Item 3.01. Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. Nasdaq Minimum Holders Requirement On May 22, 2026, Columbus Acquisition Corp, a Cayman Islands exempted company (the “Company”) received written notice (the “Minimum Holders Notice”) from the Listing Qualifications Staff of the Nasdaq Stock Market LLC (“Nasdaq”) indicating that the Company no longer complies with the Nasdaq Global Market continued listing criteria set forth in Listing Rule 5450 (a)(2) (the “Minimum Holders Rule”), which requires the Company to maintain a minimum of 400 holders for continued listing on Nasdaq. The Minimum Holders Notice is only a notification of deficiency, not of imminent delisting, and has no current effect on the listing or trading of the Company’s securities on the Nasdaq. The Minimum Holders Notice states that the Company has 45 calendar days, or until July 6, 2026, to submit a plan to regain compliance with the Minimum Holders Rule. If the Company is unable to regain compliance by that date, the Company intends to submit a plan to regain compliance with the Minimum Holders Rule within the required timeframe. If Nasdaq accepts the Company’s compliance plan, then Nasdaq may grant the Company an extension of up to180 calendar days from the date of the Minimum Holders Notice to evidence compliance. If Nasdaq does not accept the Company’s plan, then the Company will have the opportunity to appeal that decision to a Nasdaq Hearings Panel. Nasdaq Market Value of Listed Securities Requirement On the same day, the Company received written notice (the “MVLS Notice”) from the Listing Qualifications Department of Nasdaq that, for the previous 30 consecutive business days, the market value of listed securities (“MVLS”) for the Company was below the $50 million minimum MVLS requirement for continued listing on the Nasdaq Global Market under Nasdaq Listing Rule 5450(b)(2)(A) (the “MVLS Rule”). The MVLS Notice is only a notification of deficiency, not of imminent delisting, and has no current effect on the listing or trading of the Company’s securities. In accordance with Nasdaq Listing Rule 5810(c)(3)(C), the Company will have 180 calendar days, or until November 18, 2026 (the “Compliance Period”), to regain compliance with the MVLS Rule. To regain compliance with the MVLS Rule, the MVLS for the Company must be at least $50 million for a minimum of 10 consecutive business days at any time during this Compliance Period. If the Company regains compliance with the MVLS Rule, Nasdaq will provide the Company with written confirmation and will close the matter. If the Company does not regain compliance with the MVLS Rule during the Compliance Period, Nasdaq will provide written notification that its securities will be subject to delisting. In the event of such notification, the Nasdaq rules permit the Company an opportunity to appeal to Nasdaq’s determination. The MVLS Notice notes that the Company may be eligible to transfer the listing of its securities to the Nasdaq Capital Market, provided that it then satisfies the requirements for continued listing on the Capital Market. The Company is monitoring its MLVS and evaluating options to regain compliance with the MVLS Rule. However, there can be no assurance that the Company will be able to regain or maintain compliance with the MVLS Rule. Forward-Looking Statements The Company makes forward-looking statements in this report within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements relate to expectations or forecasts for future events. These forward-looking statements are based on information available to us as of the date of this report, and involve substantial risks and uncertainties. Actual results may vary materially from those expressed or implied by the forward-looking statements herein due to a variety of factors, including the Company’s ability to submit a plan of compliance satisfactory to Nasdaq, its ability to evidence that it has a minimum of 400 holders, its ability to regain compliance with MVLS Rules and other risks and uncertainties set forth in the Company’s reports filed with the Securities and Exchange Commission. The Company does not undertake any obligation to update forward-looking statements as a result of new information, future events, or developments or otherwise. 1 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Columbus Acquisition Corp By: /s/ Fen Zhang Name: Fen Zhang Title: Chief Executive Officer Date: May 26, 2026 2

Columbus Acquisition: Notice Of Delisting Or Failure To Satisfy A Continued Listing Rule Or Standard; Transfer Of Listing

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