SEALSQ Corp, a global leader in post-quantum cybersecurity, has announced its complete acquisition of Swiss photonics developer Miraex SA. This strategic move finalizes SEALSQ's end-to-end Quantum Sovereign Vertical Stack, an architecture uniting quantum-resistant silicon with orbital infrastructure. The acquisition is poised to significantly accelerate the deployment of secure, space-based quantum communications and computing networks globally.
A Strategic Quantum Integration
The acquisition of 100% of Miraex was financed through SEALSQ's dedicated Quantum Fund, which has approved capital resources of $200 million. This investment completes the company's ambitious Quantum Sovereign Vertical Stack, a comprehensive framework designed to control every layer of the quantum technology pipeline. The stack now encompasses everything from foundational semiconductor design to advanced orbital systems under a single sovereign entity.
The Critical Interconnect Layer
At the heart of this deal is Miraex's proprietary Thin Film Lithium Tantalate Photonic Integrated Circuit platform. This technology provides the critical interconnect layer, acting as a bridge between quantum computing hardware and communication networks. It facilitates the essential conversion of quantum information between microwave and optical frequencies, a requirement for any scalable quantum architecture.
Miraex's expertise is organized across three key verticals: distributed quantum computing, quantum sensing, and quantum networking. These capabilities are set to seamlessly extend SEALSQ's existing platform, enhancing its ability to link distributed quantum processors. This integration is fundamental to building globally entangled networks that can support the future quantum internet.
Advancing the Quantum Orbital Space Cloud
This acquisition directly accelerates SEALSQ's flagship Quantum Orbital Space Cloud (QOSC) program, which aims to deploy secure infrastructure in Low Earth Orbit. Miraex's photonic technology is uniquely suited for space, featuring a compact, power-efficient, and radiation-tolerant design. These attributes are critical for deployment on nanosatellites, CubeSats, and the broader QOSC constellation.
The integrated technology will enable space-grade Quantum Key Distribution (QKD) at a planetary scale, delivering communications secure from quantum adversaries. It will also extend the QOSC's utility to include distributed orbital sensing for applications like precision Earth observation and sovereign navigation. With this move, SEALSQ now commands every layer required for secure, space-grade quantum connectivity.
An End-to-End Quantum Ecosystem
The Miraex deal is the latest in a series of strategic investments executed through the SEALQuantum.com innovation lab. This broader strategy has created a uniquely cohesive and vertically integrated quantum value chain. The ecosystem now spans semiconductors, quantum hardware, orbital infrastructure, and regulatory technology, all unified under a single architecture.
Company leadership hailed the acquisition as a landmark achievement for the quantum industry. Carlos Moreira, CEO of SEALSQ, described the quantum internet as a "buildable, deployable roadmap" now that the stack is complete. Miraex CEO Daniel Brau added that SEALSQ provides the global reach and infrastructure to take their vision to a planetary scale.
The acquisition of Miraex by SEALSQ represents a significant consolidation within the quantum technology sector, creating a formidable, fully integrated industry player. This strategic union solidifies SEALSQ's position to lead the development of next-generation secure quantum networks from the ground up. The move signals a clear shift from theoretical concepts to the practical implementation of a global quantum infrastructure.