Canton of Zug, Switzerland and Singapore – December 29, 2025 - WISeKey International Holding AG (Nasdaq: WKEY) (“WISeKey”) , a global leader in cybersecurity, digital identity, and IoT solutions platform, and Columbus Acquisition Corp. (Nasdaq: COLA) (“Columbus”), a publicly traded special purpose acquisition company, today announced the confidential submission of a draft registration statement on Form F-4 (the “Confidential Registration Statement”) with the U.S. Securities and Exchange Commission (“SEC”) o ...