SEALCOIN Advances Infrastructure for the Machine Economy, Leveraging Hedera Network and Post-Quantum Cryptography Expertise Zug, Switzerland - April 22, 2026 — WISeKey International Holding Ltd (“WISeKey”) (SIX: WIHN, NASDAQ: WKEY), a leading global cybersecurity, blockchain, and IoT company, today announces that its subsidiary, SEALCOIN AG, Swiss-headquartered DEPIN (Decentralized Physical Infrastructure Network) entity revolutionizing the Internet of things and machine to machine economies’ landscape, with strategic funding and technical support from The Hashgraph Association, today announced the launch of “Spacedrop”, an early-access onboarding initiative that allows users to interact directly with the SEALCOIN ecosystem ahead of its broader rollout. Unlike traditional Web3 airdrops designed to drive short-term speculation, Spacedrop is a structured onboarding experience focused on introducing participants to SEALCOIN’s real infrastructure. Through a series of missions, points, and soul-bound tokens (SBTs), users can explore how identity, device logic, and decentralized settlement operate within a live, satellite-connected environment. Spacedrop provides early exposure to SEALCOIN’s machine-to-machine architecture, which combines hardware-based identity, certificate-driven authentication, satellite connectivity, and Hedera’s decentralized ledger technology. The program is designed to build understanding and engagement with the platform’s underlying systems before any broader ecosystem or token expansion. This includes familiarization with the network’s transaction layer, where QAIT operates as the native settlement mechanism for interactions across devices and services. Nested at the intersection of IoT, AI and Hedera’s decentralized technology, SEALCOIN is built to enable secure, autonomous interactions between devices and digital services. It combines hardware-based identity, certificate-driven authentication, and programmable settlement mechanisms to support real-world use cases across industries such as energy, telecommunications, mobility, and space infrastructure. As part of the ecosystem, SEALCOIN introduces QAIT as its native settlement token, designed to enable secure machine-to-machine transactions across devices, agents, and services. QAIT supports core network functionalities such as transaction settlement, device onboarding (PoSy), and interactions within vertical