WISeKey’s WISeSat Subsidiary Expand its Ground Segment Network in Switzerland

WISeKey’s WISeSat Subsidiary Expand its Ground Segment Network in Switzerland

Lausanne, Switzerland – August 28, 2025 - WISeKey International Holding Ltd (“WISeKey”) (SIX: WIHN, NASDAQ: WKEY), a leading global cybersecurity, blockchain, and IoT company, today announces that its subsidiary WISeSat AG, which focuses on space technology for secure satellite communication, specifically for IoT applications, has successfully installed its third ground station, located near Ecublens, in the Lausanne region of Switzerland. This new antenna will serve as a control base for the management and direction of IoT satellites, further strengthening WISeSat’s global ground infrastructure.

This installation builds on the deployment of WISeSat’s European antenna in La Línea de la Concepción, Spain, where the municipality is collaborating with WISeKey to establish the LLG 4th Industrial Revolution Center of Excellence in Gibraltar. Together, these ground stations form a robust backbone for satellite connectivity and IoT innovation across Europe.

This new ground station positions the Lausanne region as a critical hub for the deployment, control, and communication of IoT satellites. It will play a central role in supporting WISeSat’s constellation of satellites, developed by WISeKey, to provide dedicated and secure IoT connectivity anywhere on Earth using picosatellites and low-power sensors.

“This installation marks another milestone in building a secure and independent IoT satellite infrastructure in Europe,” said Carlos Moreira, CEO and founder at WISeKey. “By partnering with the Space Campus at the Ecole Polytechnique Fédérale de Lausanne, multidisciplinary hub dedicated to advancing space technologies, research, and innovation, we are strengthening collaboration across academia, startups, industry, and government. This unique ecosystem, anchored within one of Europe’s leading technical universities, is driving forward cutting-edge projects in satellite systems, space communications.”

WISeSat delivers a highly reliable IoT connectivity solution that ensures secure communications for critical applications, from smart cities and agriculture to logistics, energy, and environmental monitoring. By expanding its network of ground stations, WISeSat is laying the foundation for a fully European-controlled and operated satellite connectivity system aligned with Europe’s strategic digital and space independence goals.

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 house 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. The company’s semiconductors generate valuable Big Data that, when analyzed with AI, enable predictive equipment failure prevention. 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 .

Disclaimer

This communication expressly or implicitly contains certain forward-looking statements concerning WISeKey International Holding Ltd and its business. Such statements involve certain known and unknown risks, uncertainties and other factors, which could cause the actual results, financial condition, performance or achievements of WISeKey International Holding Ltd to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. WISeKey International Holding Ltd 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.

This press release does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, and it does not constitute an offering prospectus within the meaning of the Swiss Financial Services Act (“FinSA”), the FinSa's predecessor legislation or advertising within the meaning of the FinSA. Investors must rely on their own evaluation of WISeKey and its securities, including the merits and risks involved. Nothing contained herein is, or shall be relied on as, a promise or representation as to the future performance of WISeKey.

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