Geneva, Switzerland – March 24, 2026 – SEALSQ Corp (NASDAQ: LAES) (“SEALSQ” or the
“Company”), a subsidiary of WISeKey International Holding Ltd (NASDAQ: WKEY; SIX: WIHN) and a
leader in post-quantum semiconductor and cybersecurity solutions, today announced that it has
signed a Letter of Intent (“LOI”) to acquire 100% of the equity interest of Miraex SA (“Miraex”), a
developer of photonics-based quantum interconnect solutions bridging quantum processors and
quantum networks.