Columbus Acquisition Corp/Cayman Islands 8-K

What Happened
Columbus Acquisition Corp (COLA) filed a Form 8-K on December 29, 2025, reporting a joint press release with WISeKey International Holding AG (SIX: WIHN, NASDAQ: WKEY). The release announced that WISeKey and Columbus confidentially submitted a draft registration statement on Form F-4 to the U.S. Securities and Exchange Commission on December 23, 2025. The press release is attached as Exhibit 99.1 to the 8-K and the company notes it is not deemed “filed” for purposes of Section 18 of the Exchange Act.

Key Details

• Parties: WISeKey International Holding AG and Columbus Acquisition Corp (“CAC”).
• Filing: Confidential draft Form F-4 submitted to the SEC on December 23, 2025.
• Disclosure date: Joint press release issued December 29, 2025; attached as Exhibit 99.1 to the 8-K.
• Regulatory note: Press release is furnished under Item 7.01 (Regulation FD Disclosure) and is not subject to Exchange Act Section 18 liability.

Why It Matters
A confidential Form F-4 submission typically signals progress toward a proposed business combination, merger, or related transaction involving a foreign issuer and a U.S. registration process. For investors, this is an important regulatory step that can lead to a definitive transaction filing and eventual shareholder votes or securities issuance. The 8-K does not include transaction terms, financials, or timing — investors should watch for a subsequent SEC-filed registration statement or definitive proxy/transaction documents for material details such as deal structure, valuation, or impacts on revenue and ownership.