Quantisimo Corp., the Pure-Play Sovereign Quantum Vertical Platform “Root to Qubit” Formed by WISeQey and SEALSQ, Signs Definitive Business Combination Agreement with GigCapital8 Corp. to Become a Nasdaq-Listed Public Company

Quantisimo Corp., the Pure-Play Sovereign Quantum Vertical Platform “Root to Qubit” Formed by WISeQey and SEALSQ, Signs Definitive Business Combination Agreement with GigCapital8 Corp. to Become a Nasdaq-Listed Public Company Quantisimo Corp. (“Quantisimo”), established by WISeQey Corp (Nasdaq/SIX: WQEY) (“WISeQey”), a global quantum cybersecurity and space IoT company, and its subsidiary, SEALSQ Corp (Nasdaq: LAES) (“SEALSQ”), a developer of secure semiconductors, public key infrastructure (PKI) and post-quantum security products, is being developed as a pure-play sovereign quantum vertical platform under the vision “Root to Qubit.” Through the proposed contribution of interests in Miraex SA, SEALCOIN AG, WeCan Group SA and WISeSat.Space Holdings Corp. (“WISeSat.Space”) (Nasdaq: SAIQ), a space technology and secure satellite communications company together with selected future quantum technologies and strategic investments, Quantisimo aims to connect the foundations of digital trust with quantum computing, quantum networking and secure terrestrial and space infrastructure. The definitive business combination agreement follows the letter of intent between Quantisimo and GigCapital8 Corp. (NASDAQ: GIW) (“GigCapital8”), a Private-to-Public Equity (PPE)™ company also known as a special purpose acquisition company (SPAC), announced on June 24, 2026. Upon closing, WISeQey and SEALSQ will receive an aggregate of 66,610,000 shares of the new publicly listed holding company, Quantisimo…