WISeSat Advances Nasdaq Plan With Confidential F-4 Filing

Overview

• WISeSat filed an amended confidential Form F-4 with the SEC on May 29, 2026, a regulatory step toward listing the combined company on Nasdaq under the expected WSAT ticker.
• The business-combination framework stems from a November 9, 2025 agreement that would make WISeSat and Columbus Acquisition Corp. subsidiaries of a new public company after closing.
• The transaction is not complete because the public Form F-4 has not yet become effective and the deal still needs SEC review, Columbus Acquisition shareholder approval, and Nasdaq listing acceptance.
• Investors pushed WISeKey’s Nasdaq shares lower after the filing update, with the stock closing at $8.25 on the cited trading day and trading near $8.17 in pre-market trade as markets weighed execution and structure risks.
• Advisers have been named to guide the deal—Maxim Group as WISeKey’s financial adviser, Ellenoff Grossman & Schole for WISeSat and Pubco, and Loeb & Loeb for Columbus Acquisition—and the merger aims to pair WISeSat’s quantum-resilient satellite services with WISeKey’s cybersecurity and digital-identity tools to serve governments and security-sensitive customers.