WISeSat.Space Completes Business Combination and Begins Nasdaq Trading

Insider Brief

• WISeSat.Space, a sister company of SEALSQ, completed its business combination with Columbus Acquisition Corp. and began trading on Nasdaq under the ticker SAIQ on October 2, 2026.
• The transaction establishes WISeSat.Space as a separately listed company focused on post-quantum-secure satellite communications and IoT connectivity.
• WISeSat.Space plans to combine satellite communications with digital identity, secure semiconductors and post-quantum technologies for connected devices and other applications.

PRESS RELEASE — SEALSQ Corp (NASDAQ: LAES) (“SEALSQ” or “Company”), a company that focuses on developing and selling Semiconductors, PKI, and Post-Quantum technology hardware and software products, today announced that its sister company, WISeSat.Space Holdings Corp. (“WISeSat.Space”) (Nasdaq: SAIQ), as space technology company and a subsidiary of WISeQey Corp. (formerly known as WISeKey International Holding AG, “WISeQey”) (SIX: WIHN; Nasdaq: WKEY), a global quantum cybersecurity and space IoT company, has completed its previously announced business combination with Columbus Acquisition Corp. (“CAC”).

Effective today, October 2, 2026, WISeSat.Space ordinary shares have commenced trading on the Nasdaq Capital Market under the ticker symbol “SAIQ.”