<img src="https://ml.globenewswire.com/Resource/Download/4071513d-3f7c-4a38-a055-8da38cfb60df?size=2" nborder="0" align="left" hspace="5" vspace="5" title="SEAL LOGO.png" alt="SEALSQ"/>Geneva, Switzerland, Sept. 09, 2026 <a href="https://www.globenewswire.com" target="_blank">(GLOBE NEWSWIRE)</a> -- QSOC aims to establish a secure, sovereign orbital infrastructure combining post-quantum semiconductors, quantum-generated trust and satellite connectivity. 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, and WISeSat.Space (“WISeSat”) which focuses on space technology for secure satellite communication, a subsidiary of SEALSQ’s parent company, WISeKey International Holding Ltd (SIX: WIHN, NASDAQ: WKEY), today presented their commercial Quantum Spatial Orbital Cloud (“QSOC”) initiative during the <a href="https://www.globenewswire.com/Tracker?data=OwxJW_9wXu2hcz1LvaVL4Ha7Gveb7V1ELjvCDegNmChybpYgVYqN_kDXGPtLHzD22NadHV45hOzzoD0Lo4UH5FJLXsvmKygfvft8DkC02zyUfVqdp1exF8AbrERYPbElAgOnAzCYVXemDHqGd2PUbpoBgBvoRJgdwlh0QtBSyu5lVcymIzKlsnebtwNyEcYPRd2i-mZx1LzGgYg_IOZJ_A==" rel="nofollow" target="_blank" title="International Space Summit">International Space Summit</a>⁠, being held in Paris on September 9 and 10, 2026. The International Space Summit brings together Heads of State and Government, international organizations, scientists, military representatives, astronauts, policymakers, investors and private-sector leaders to address the opportunities and challenges shaping the future of the space industry. SEALSQ and WISeSat used the Summit to outline their shared vision for transforming space into a critical infrastructure layer for the emerging quantum internet. The QSOC program is designed to combine WISeSat’s secure satellite constellation and orbital operations with SEALSQ’s post-quantum semiconductors, Public Key Infrastructure (“PKI”), quantum random-number generation and identity-management technologies. Originally <a href="https://www.globenewswire.com/Tracker?data=GtbEk7r6enkAFVi-ulF2ZOqIeAJF6JZ1V2EPRkiQ2LRCpiHFLHTrxnnccccu91aTMdVFjAbn2TiD83-4leo71AawY7L_na0pJZ0BYylK_lmXQQ4E0HYEEQuSO9YBuxHK9iIPH99ZVPNaCQIvLPJJDOWTsEOJH9-YKF1uMjcMI6LvzkqLVkI0lCl0qWcURm_yksJr5eKuKZbpekXw_T7CKay9KXaa2vWOmRH-8XQ3A4Y=" rel="nofollow" target="_blank" title="announced in March 2026">announced in March 2026</a>⁠, the QSOC initiative plans the progressive deployment of a constellation of up to 100 satellites through 2033. The objective is to deliver secure communications, certified quantum randomness and post-quantum identity services from space to governments, defense organizations, financial institutions, critical-infrastructure operators and enterprises. Building the Security Layer of the Quantum Internet Quantum computing is expected to create transformative opportunities, but it also poses a fundamental threat to many of the cryptographic systems currently protecting global communications, financial transactions and critical infrastructure. QSOC is being designed to respond to this challenge by moving part of the post-quantum trust infrastructure into orbit, creating a geographically distributed and resilient security layer that is more difficult to disrupt or compromise. The planned platform is expected to support: <ul type="disc"><li style="margin-bottom:8pt; text-align:justify;">Post-quantum-secured satellite communications;</li><li style="margin-bottom:8pt; text-align:justify;">Quantum Random Number Generation (“QRNG”) delivered from orbit;</li><li style="margin-bottom:8pt; text-align:justify;">Post-quantum identity and device-authentication services;</li><li style="margin-bottom:8pt; text-align:justify;">Secure key provisioning and lifecycle management;</li><li style="margin-bottom:8pt; text-align:justify;">Sovereign communications for governments and critical infrastructure;</li><li style="margin-bottom:8pt; text-align:justify;">Protection against “harvest now, decrypt later” attacks; and</li><li style="margin-bottom:8pt; text-align:justify;">Future integration with terrestrial and space-based quantum computing and optical networks utilizing quantum entanglement (QKD). </li></ul> SEALSQ intends to operate the QSOC security and cloud-services layer, including its quantum-resistant in-silicon cryptographic semiconductor technology, security architecture, software, service catalogue and customer relationships. WISeSat envisions to provide and operate the underlying space infrastructure, including the satellites, secure payloads, ground segment, mission control, spectrum and emission management and communications links. This structure is intended to allow SEALSQ to commercialize subscription-based quantum-security services without assuming the full capital cost of owning the satellite constellation, while allowing WISeSat to focus on developing and operating secure orbital infrastructure. Carlos Moreira, Chairman and CEO of SEALSQ, commented: “Presenting QSOC at the International Space Summit in Paris demonstrates that post-quantum security and sovereign satellite infrastructure must now be addressed as a single strategic priority. The quantum internet will not be exclusively terrestrial. Space will become an essential layer for distributing trusted identities, cryptographic keys and quantum-generated randomness across borders.” Mr. Moreira continued: “SEALSQ and WISeSat are combining semiconductor security, post-quantum cryptography, PKI and satellite operations into an integrated commercial platform. Our objective is to make QSOC the orbital trust infrastructure protecting governments, financial systems, defense networks and critical industries as the world enters the quantum era.” Supporting Sovereign and Resilient Digital Infrastructure The presentation in Paris comes as governments worldwide are increasing their focus on sovereign space capabilities, post-quantum migration and the protection of critical communications systems. By combining secure terrestrial infrastructure with a dedicated orbital layer, SEALSQ and WISeSat believe QSOC can contribute to a more resilient and sovereign global communications architecture. The platform is intended to complement national and regional quantum-communications programs while offering commercial access to organizations requiring scalable, managed post-quantum security services. The parties expect the QSOC constellation to be deployed progressively, subject to technical validation, regulatory authorizations, launch availability, financing, commercial agreements and final corporate approvals. About WISeSat.Space WISeSat.Space ambitions to develop, launch with partners and operate secure small-satellite infrastructure for IoT, encryption key exchange and advanced communications applications. As the planned owner and operator of the QSOC space segment, WISeSat is expected to provide the satellites, secure payload infrastructure, ground systems and mission operations supporting SEALSQ’s Quantum Spatial Orbital Cloud. For more information, visit <a href="https://www.globenewswire.com/Tracker?data=pZ4HuhBNrZVPt-cK3vtLEIOI8wqwjfBf6I_4fZtWAytTRqkGDyZkwOjgb7KBmcctDxueh9i2B0_LFi1KOI6wDDkr2vvypd-qoZHHjjRea-Y=" rel="nofollow" target="_blank" title="www.wisesat.space">www.wisesat.space</a>⁠. About WISeKey WISeKey International Holding Ltd (“WISeKey”, SIX: WIHN; Nasdaq: WKEY) is a global leader in cybersecurity, digital identity, and IoT solutions platform. It operates as a Swiss-based holding company through several operational subsidiaries, each dedicated to specific aspects of its technology portfolio. The subsidiaries include (i) SEALSQ Corp (Nasdaq: LAES), which focuses on semiconductors, PKI, and post-quantum technology products, (ii) WISeKey SA, which specializes in RoT and PKI solutions for secure authentication and identification in IoT, blockchain, and AI, (iii) WISeSat AG which focuses on space technology for secure satellite communication, specifically for IoT applications, (iv) WISe.ART Corp which focuses on trusted blockchain NFTs and operates the WISe.ART marketplace for secure NFT transactions, and (v) SEALCOIN AG which focuses on decentralized physical internet with DePIN technology and houses the development of the SEALCOIN platform. Each subsidiary contributes to WISeKey’s mission of securing the internet while focusing on their respective areas of research and expertise. Their technologies seamlessly integrate into the comprehensive WISeKey platform. WISeKey secures digital identity ecosystems for individuals and objects using blockchain, AI, and IoT technologies. With over 1.6 billion microchips deployed across various IoT sectors, WISeKey plays a vital role in securing the Internet of Everything. Trusted by the OISTE/WISeKey cryptographic Root of Trust, WISeKey provides secure authentication and identification for IoT, blockchain, and AI applications. The WISeKey Root of Trust ensures the integrity of online transactions between objects and people. For more information on WISeKey’s strategic direction and its subsidiary companies, please visit www.wisekey.com. About SEALSQ: SEALSQ is a leading innovator in Post-Quantum Technology hardware and software solutions. Our technology seamlessly integrates Semiconductors, PKI (Public Key Infrastructure), and Provisioning Services, with a strategic emphasis on developing state-of-the-art Quantum Resistant Cryptography and Semiconductors designed to address the urgent security challenges posed by quantum computing. As quantum computers advance, traditional cryptographic methods like RSA and Elliptic Curve Cryptography (ECC) are increasingly vulnerable. SEALSQ is pioneering the development of Post-Quantum Semiconductors that provide robust, future-proof protection for sensitive data across a wide range of applications, including Multi-Factor Authentication tokens, Smart Energy, Medical and Healthcare Systems, Defense, IT Network Infrastructure, Automotive, and Industrial Automation and Control Systems. By embedding Post-Quantum Cryptography into our semiconductor solutions, SEALSQ ensures that organizations stay protected against quantum threats. Our products are engineered to safeguard critical systems, enhancing resilience and security across diverse industries. For more information on our Post-Quantum Semiconductors and security solutions, please visit <a href="https://www.globenewswire.com/Tracker?data=x8mUeGnKWdpyVEOM4OywmD960zxCp6HySi2AvHeSSZ8H7Hk8XnYDTDQ5Q-J-pWxrwtrKltuwV-ZnQ95-ytYLog==" rel="nofollow" target="_blank" title="www.sealsq.com">www.sealsq.com</a>. Forward-Looking Statements This communication expressly or implicitly contains certain forward-looking statements concerning SEALSQ Corp and its businesses. Forward-looking statements include statements regarding our business strategy, financial performance, results of operations, market data, events or developments that we expect or anticipate will occur in the future, as well as any other statements which are not historical facts. Although we believe that the expectations reflected in such forward-looking statements are reasonable, no assurance can be given that such expectations will prove to have been correct. These statements involve known and unknown risks and are based upon a number of assumptions and estimates which are inherently subject to significant uncertainties and contingencies, many of which are beyond our control. Actual results may differ materially from those expressed or implied by such forward-looking statements. Important factors that, in our view, could cause actual results to differ materially from those discussed in the forward-looking statements include SEALSQ's ability to continue beneficial transactions with material parties, including a limited number of significant customers; market demand and semiconductor industry conditions; and the risks discussed in SEALSQ's filings with the SEC. Risks and uncertainties are further described in reports filed by SEALSQ with the SEC. SEALSQ Corp is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise. <table style="border-collapse: collapse; width:100%; border-collapse:collapse ;"><tr><td style="vertical-align: top ; ">SEALSQ Corp. Carlos Moreira Chairman &amp; CEO Tel: +41 22 594 3000 info@sealsq.com</td><td style="vertical-align: top ; ">SEALSQ Investor Relations (US) The Equity Group Inc. Lena Cati Tel: +1 212 836-9611 <a href="mailto:lena.cati@theequitygroup.com" rel="nofollow" target="_blank" title="lena.cati@theequitygroup.com">lena.cati@theequitygroup.com</a> </td></tr></table> <img alt="" src='https://ml.globenewswire.com/media/MTlkOThjMWEtZmNjOS00Nzk4LThiMTAtNWU2N2VmNDJiZGZhLTEyNjY0MDUtMjAyNi0wOS0wOS1lbg==/tiny/SEAL-Semiconductors.png' referrerpolicy='no-referrer-when-downgrade' />

SEALSQ and WISeSat Present Commercial Quantum Spatial Orbital Cloud (QSOC) at the International Space Summit in Paris

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