SEALSQ Corp Signs LOI to Acquire 100% of Miraex SA

SEALSQ Corp signed a letter of intent to acquire 100% of the equity interest in Miraex SA, a photonics-based quantum interconnect developer based in Ecublens, Switzerland. The agreement matters because it sets terms for exclusivity, due diligence, and the path toward a definitive acquisition later in 2026.

Under the proposed deal, the transaction was set up to use the SEALSQ Quantum Fund as part of SEALSQ’s strategic investment program. SEALSQ also described the acquisition as part of a broader effort to complete a Quantum Vertical Stack and to reinforce the SEALSQ Quantum Spatial Orbital Cloud (QSOC) initiative.

Miraex develops photonics-based quantum interconnect solutions that convert, transmit, and link quantum information between separated quantum processors and quantum networks. The company described work across Distributed Quantum Computing (DQS), Quantum Sensing based on photonic entanglement, and Quantum Networking for globally entangled quantum networks. Miraex also cited patent coverage for electro-optical microwave-optical and optical-microwave transduction schemes, as well as traveling wave transducer designs.

The letter of intent was binding on Miraex and included a 60-day exclusivity period for confirmatory due diligence and negotiation of definitive transaction documents. The transaction was expected to be finalized by the end of June 2026, subject to customary closing conditions and regulatory processes. Carlos Moreira, CEO of SEALSQ, said, “Miraex represents exactly the kind of foundational quantum asset we have been seeking to complete our Quantum Vertical Stack. Their photonics-based quantum interconnect solutions are not just complementary to our roadmap, they form a critical interconnect layer linking our quantum computing, quantum networking, and post-quantum cryptography capabilities into a more coherent architecture. Furthermore, the alignment with our QSOC initiative is compelling. Once the acquisition is completed, the integration of Miraex’s technology is expected to accelerate our vision of extending quantum-secure infrastructure across terrestrial and space-based environments, strengthening the resilience and performance of our end-to-end platform.” Daniel Brau, CEO of Miraex, commented, “We are excited about the signing of this LOI and the opportunity to join SEALSQ through the Quantum Fund. We are proud of what we have achieved. Our TFLN PIC platform has been designed from the ground up to be the connective tissue of the quantum ecosystem, linking quantum processors, quantum sensors, and quantum networks into a unified infrastructure. We believe SEALSQ’s global reach, semiconductor expertise, and QSOC vision will accelerate our mission to connect quantum resources at planetary scale.” Forward-looking statements in the communication addressed expectations about future business strategy and results, and noted that actual outcomes may differ.