SEALSQ completes acquisition of Swiss quantum-interconnect company Miraex SA
SEALSQ Corp (Nasdaq: LAES) announced on 2026-06-02 that it completed its acquisition of 100% of Miraex SA, a photonics-based quantum-interconnect company headquartered at the EPFL Innovation Park in Ecublens, Switzerland. Per SEALSQ's investor-relations release, Miraex develops a photonic integrated-circuit platform built on thin-film lithium tantalate, targeting distributed quantum computing, photonic-entanglement-based distributed sensing, and quantum networking. SEALSQ stated the purchase was funded through its internal Quantum Fund, which it describes as having a $200M total allocation of which over $65M has been deployed; the per-deal consideration for Miraex was not separately disclosed. The transaction follows a letter of intent SEALSQ signed on 2026-03-24. SEALSQ framed the close as completing its 'Quantum Sovereign Vertical Stack' spanning post-quantum silicon, orbital infrastructure, and distributed quantum sensing.
The close converts SEALSQ's March letter of intent into a completed control transaction, adding photonic quantum-interconnect capability to a vendor previously concentrated in post-quantum-cryptography silicon, and is a concrete corporate action at a tracked public pure-play.
If integration proceeds, SEALSQ's positioning shifts from a PQC-chip supplier toward a vertically integrated quantum-infrastructure vendor; the small, undisclosed deal size and Miraex's pre-revenue stage limit near-term financial impact.