WISeKey International Holding Ltd. ("WISeKey") ((SIX: WIHN, NASDAQ:WKEY), a global leader in cybersecurity, digital identity and IoT, and its subsidiary WISeSat.Space Corp. ("WISeSat") today announced the confidential submission of an amended draft registration statement on Form F-4 with the U.S. Securities and Exchange Commission ("SEC") on May 29, 2026 by WISeSat.Space Holdings Corp. ("Pubco"), a wholly-owned subsidiary of WISeSat.

The draft registration statement relates to the previously announced proposed business combination pursuant to a definitive Business Combination Agreement, dated November 9, 2025 (the "Business Combination Agreement"), by and among WISeSat, Columbus Acquisition Corp (NASDAQ:COLA) ("CAC"), a special purpose acquisition company, Pubco, WISeKey, and WISeSat Merger Sub Corp. Upon completion of the proposed business combination, each of WISeSat and CAC will become subsidiaries of Pubco, and the combined company is expected to trade on Nasdaq under the ticker symbol "WSAT."

WISeSat, a British Virgin Islands business company operating through its wholly owned subsidiary WISeSat.Space AG, is developing secure satellite infrastructure and space-based services designed to support trusted communications, digital identity, secure data exchange and other security-sensitive applications.