425 - Columbus Acquisition Corp/Cayman Islands

Form 425 - Prospectuses and communications, business combinations: SEC Accession No. 0001213900-26-047508

Filing Date: 2026-04-24

Accepted: 2026-04-24 16:01:05

Documents: 1

Columbus Acquisition Corp/Cayman Islands (Filed by) CIK : 0002028201 (see all company filings) EIN. : 000000000 | Fiscal Year End: 1231 Type: 425 SIC : 6770 Blank Checks (CF Office: 05 Real Estate & Construction)

1 | CURRENT REPORT | ea0287546-8k425_columbus.htm | 425

SECURITIES AND EXCHANGE COMMISSION

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): April 20, 2026

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Securities registered pursuant to Section 12(b) of the Act.

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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Pursuant to the amended and restated memorandum and articles of association (the “ Charter ”) of Columbus Acquisition Corp, a Cayman Islands exempted company (the “ Company ”), the Company had until April 22, 2026 to complete its initial business combination, however the Company may extend the period of time to consummate a business combination up to January 22, 2027, each by a one-month extension, subject to the deposit of $50,000 (the “ Monthly Extension Fee ”) into the trust account of the Company (the “ Trust Account ”).

On or about April 20, 2026, an aggregate of $50,000 of the Monthly Extension Fee was deposited into the Trust Account for the public shareholders, which enabled the Company to extend the period of time it has to consummate its initial business combination by one month from April 22, 2026 to May 22, 2026. Among the Monthly Extension Fee, $25,000 was paid from the Company’s working capital, and the remaining $25,000 was paid by WISeSat.Space Corp., a British Virgin Islands business company (the “ Target ”) pursuant to that certain business combination agreement dated as of November 9, 2025 (as it may be amended, supplemented, or otherwise modified from time to time, the “ Business Combination Agreement ”) by and among the Company, the Target and other parties thereto in connection with a proposed business combination.

Item 9.01 Financial Statements and Exhibits.

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.