WISeKey Issues CEO Letter to Shareholders

WISeKey Issues CEO Letter to Shareholders Geneva, Switzerland – May 6, 2026 — WISeKey International Holding Ltd ("WISeKey" or the "WISeKey Group") (SIX: WIHN, NASDAQ: WKEY), a leading global cybersecurity, post-quantum semiconductor, and IoT company, today issued the following letter to shareholders from its Founder and Chief Executive Officer, Carlos Moreira. Dear Shareholders, Partners, and Friends, I would like to personally share with you the key developments that define where WISeKey stands today, and more importantly, where we are going.