SEALSQ Corp builds “Root-to-Qubit” quantum stack with investments

SEALSQ Corp said it is expanding its position across quantum security and quantum computing by investing in and acquiring stakes spanning multiple quantum computing companies. The company framed the effort as a “Root-to-Qubit” stack that connects post-quantum security with next-generation quantum hardware.

SEALSQ positioned the plan as a vertically integrated platform that connects quantum-resistant security at the silicon level to a quantum compute layer. Management said the approach relied on more than one architecture and paired quantum-related investments with SEALSQ’s secure semiconductor and post-quantum product portfolio, including QS7001 and QVault TPM.

The company described its portfolio as extending from “sovereign-by-design secure silicon” through post-quantum communications and orbital infrastructure, up to quantum processors of the next decade. SEALSQ said it planned to deploy capital across several complementary approaches to fault-tolerant quantum computing and bind them to its own QS7001 secure hardware, QVault TPM, and PQC product portfolio, which included ML-KEM and ML-DSA delivered in EAL5+ hardware and FALCON.

SEALSQ said it closed investments in four quantum computing companies spanning leading solid-state and analog approaches, while progressing a pipeline of additional opportunities across photonics, carbon-based qubits, and post-quantum software. Carlos Moreira, Founder, Chairman & CEO, said, “SEALSQ has built his foundation at the Root of Trust, securing the digital infrastructure that the world depends on. Moving into the full quantum stack is the natural extension of that mission. We are not choosing one horse; we are building the track. By investing across the leading qubit technologies and connecting them to our post-quantum silicon, we are creating a differentiated Root-to-Qubit platform that very few companies in the world can offer.” SEALSQ added it intended to continue evaluating quantum investments and partnerships through 2026 and beyond.