SEALCOIN Unveils Major Milestones: From Satellite-Powered IoT Transactions toLaunch of Marketing Campaign Ahead of Token Sale

Geneva, Switzerland, May 22, 2025 –WISeKey International Holding Ltd (“WISeKey”) (SIX: WIHN, NASDAQ: WKEY), a leading global cybersecurity, blockchain, and IoT company

Geneva, Switzerland, May 22, 2025 –- International Holding Ltd (“WISeKey”) (SIX: WIHN; Nasdaq: WKEY), a leading cybersecurity, blockchain, and IoT solutions company, today announces that its subsidiary SEALCOIN AG, developing a decentralized platform powering secure, autonomous, real-time transactions between IoT devices, has reached several major milestones as it accelerates toward its upcoming token launch this summer.

After months of focused development and testing, SEALCOIN AG has released the latest version of its WhitePaper, which includes an upgraded tokenomics model to better align with long-term network incentives and security. This adjustment to the tokenomics, announced earlier this year, introduces a refined structure that enhances both utility and governance for the upcoming TIOT token, ensuring sustainable growth and increased value for all stakeholders.

In parallel, the Minimum Viable Product (MVP) of the SEALCOIN platform has now been officially launched. Fully integrated with Hedera’s public DLT infrastructure, the platform has entered its beta testing phase, with a select group of users beginning to onboard and trial the platform’s unique capabilities for real-time, peer-to-peer device transactions.

Building on the success of its first technical Proof-of-Concept (PoC) in July 2024, SEALCOIN has achieved a new milestone: a successful device-to-device transaction over satellite, completed in April 2024 in partnership with WISeSat. This achievement showcases SEALCOIN’s ability to execute secure microtransactions between remote IoT devices, even without terrestrial connectivity, highlighting a pivotal leap for decentralized infrastructure in off-grid environments.

Key Use Cases Gaining Traction Include:

* Satellite-powered IoT transactions: In April 2025, SEALCOIN successfully executed a PoC for a device-to-device transaction via satellite, demonstrating the potential of its technology to connect and facilitate transactions between IoT devices in remote or off-grid locations using satellite communication. This builds on the growing interest in satellite technology for broader internet access and expands the possibilities for decentralized transactional ecosystems.

* Advanced tokenomics: Through ongoing discussions with leading members of the Web3 community, the tokenomics model for the upcoming TIOT token has been optimized to better align with long-term network incentives and ensure sustainable growth for the SEALCOIN ecosystem.

* Minimum Viable Product (MVP) launch: Following successful development stages, the MVP of the SEALCOIN platform has been launched and is now undergoing beta testing with select users. This marks a key step toward the full deployment of the platform for decentralized transactional services.

* Global marketing campaign kicks off: As the anticipation builds for the upcoming token launch, SEALCOIN has unveiled its global marketing campaign, which will engage key members of the Web3 community and introduce the revolutionary technology of the Physical Internet.

Join the SEALCOIN Community and follow our journey:

* Twitter/X: https://x.com/sealcoin_ai

* Telegram: https://t.me/sealcoin_ai

* LinkedIn: https://www.linkedin.com/company/sealcoin/

* Newsletter Signup: www.sealcoin.ai/pre-registration/

Now is the time to be part of a future where connected devices don’t just talk — they transact.

About SEALCOINSEALCOIN is a decentralized platform designed to enable transactional IoT at scale. By embedding secure payment and authentication capabilities directly into IoT devices, SEALCOIN makes device-to-device economies not just possible, but practical. More information available on www.sealcoin.ai

About WISeKey

WISeKey International Holding Ltd (“WISeKey”, SIX: WIHN; Nasdaq: WKEY) is a global leader in cybersecurity, digital identity and IoT solutions and operates 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 1.6 billion microchips deployed across various sectors of the Internet of Things, ranging from smart cities to energy management and connected vehicles, WISeKey is at