SEALSQ boosts quantum strategy with new EeroQ investment
SEALSQ has doubled down on its “Quantum Made in USA” strategy with an additional strategic investment in US-based quantum startup EeroQ. The move strengthens SEALSQ’s ambition to build a vertically integrated, sovereign quantum and post-quantum security ecosystem spanning the US and Europe.
For eeNews Europe readers, the deal is relevant because it highlights a concrete, hardware-focused approach to scalable quantum computing, while also linking quantum processors directly with post-quantum secure semiconductors. It also shows how investment strategies are increasingly aligning quantum R&D with semiconductor manufacturing realities.
Scaling quantum hardware, the practical way
Geneva-based SEALSQ Corp (NASDAQ: LAES) announced the new investment on February 19, 2026, expanding its earlier stake in EeroQ first made in December 2025. The investment is part of SEALSQ’s SEALQUANTUM.com Quantum Investment Fund, a more than $100m platform launched in 2025 to back selected quantum computing ventures in Europe and the US.
EeroQ is developing a quantum computing architecture based on the spins of electrons floating on superfluid helium. While the idea dates back to the early 2000s, the company argues that advances in materials, microfabrication and cryogenics now make it viable at scale. The key promise: an ultra-compact, CMOS-compatible quantum processor that could eventually scale from today’s thousands of electrons to millions of qubits.
A recent EeroQ breakthrough addresses one of quantum computing’s most stubborn bottlenecks – the “wire problem.” The company demonstrated a control architecture capable of managing up to one million qubits with fewer than 50 physical control lines, dramatically reducing cabling, thermal load and system complexity compared with other approaches.
Building a quantum security stack
SEALSQ positions the EeroQ investment as a core building block of its so-called Quantum Highway strategy, which aims to link post-quantum cryptography, secure semiconductor manufacturing and future quantum computers into a single trusted stack. As part of the partnership, the two companies plan to build a full proof-of-concept at the SEALSQ Quantum Center of Excellence in Geneva, integrating secure hardware, post-quantum cryptography and emerging quantum processing.
“This extended investment in EeroQ marks a significant milestone in SEALSQ’s Quantum Made in USA strategy and in the establishment of our Quantum Highway,” said Carlos Moreira, Founder and CEO of SEALSQ. “EeroQ’s helium-based quantum architecture, combined with its breakthrough control scalability, stands out as one of the most promising designs we have evaluated.”
EeroQ CEO Nick Farina added: “This extended investment from SEALSQ, not only validates our technology and long-term vision, but also provides a strong endorsement of our long-term vision for scalable, secure quantum systems.”
Europe, the US, and the long game
Alongside its US investments, SEALSQ has been active in Europe, backing projects ranging from post-quantum semiconductor personalization in Spain to ASIC design in France and satellite-based post-quantum communications. Against this backdrop, EeroQ’s US-centric development and fabrication plans fit neatly with growing geopolitical emphasis on sovereign quantum technologies.
Led by CTO Steve Lyon of Princeton University and CSO Johannes Pollanen, EeroQ operates a 9,600-square-foot quantum R&D facility in Chicago and has also positioned itself as a proponent of ethical quantum development. For SEALSQ, that combination of scalability, manufacturability and governance appears to be a key part of the bet.
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