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SEALSQ Corp (NASDAQ: LAES), a global leader in semiconductors, Public Key Infrastructure (PKI), and post-quantum cybersecurity, has announced a significant second strategic investment in EeroQ. SEALSQ plans to use its “Quantum Made in USA” strategy to lead the global competition for secure and scalable quantum technology.

SEALSQ's SEALQUANTUM.com Quantum Investment Fund, founded in 2025, invested over $100 million in bootstrapping quantum startups. Following a December 2025 investment, this latest tranche shows a growing relationship between SEALSQ's secure silicon and post-quantum cryptography expertise and EeroQ's unique hardware.

Scalability Bottleneck Solution: EeroQ

This partnership relies on EeroQ's quantum architecture, which uses electrons trapped on superfluid helium (eHe). Unlike superconducting or trapped-ion devices, EeroQ's technique can scale from thousands to millions of electron spin qubits cost-effectively.

One of EeroQ's greatest technical achievements is solving the industry's “wire problem”. EeroQ has revealed a control architecture that can manage one million qubits with fewer than 50 physical control lines, whereas existing quantum implementations require thousands, causing thermal and engineering issues. EeroQ leads the way in commercial quantum processor development by reducing power dissipation and system complexity.

EeroQ's technology is also CMOS-compatible, thus it can be made using silicon chip industry fabrication methods. When combined with a tiny form factor that might make quantum processors as small as a thumbnail, this compatibility allows for rapid commercial adoption and infrastructure integration.

The “Quantum Highway”: Vertical Integration Vision

The Quantum Highway approach requires SEALSQ to invest in EeroQ, not merely for financial gain. This industry concept proposes a "Quantum Security Vertical Stack" to integrate post-quantum cryptography (PQC), classical computing, and future quantum processing safely and uninterrupted.

SEALSQ founder and CEO Carlos Moreira said, “This expanded investment in EeroQ represents a significant milestone in SEALSQ’s Quantum Made in USA strategy and in the establishment of a Quantum Highway.” EeroQ's hardware and SEALSQ's Quantum Shield QS7001 and VaultIC safe parts will be combined to create end-to-end systems for critical infrastructure, government agencies, and national defense.

To demonstrate this capability, the two companies aim to build a PoC at the SEALSQ Quantum Center of Excellence in Geneva. This platform will show how EeroQ's quantum processing technologies, post-quantum resistant systems, and secure semiconductor hardware integrate smoothly, giving enterprises a roadmap for future-proof infrastructures.

Emerging Global Footprint and “Quantum Corridor”

The “Quantum Made in USA” slogan promotes American sovereignty, yet SEALSQ is worldwide. This company has invested heavily in Europe and the US, putting resources along the Quantum Corridor:

Spain: SEALSQ and its parent company, WISeKey International Holding AG, have pledged $12 million and €20 million from the Spanish government's SETT.ES program to create a Post-Quantum Semiconductor Personalization and Test Center in Murcia.

Switzerland: PQC-secured blockchain identities will be integrated into enterprise and financial systems through a $3.5 million Group investment.

France: The purchase of top ASIC designer IC'ALPS is expected to speed up the production of customized, quantum-ready silicon.

WISeSat deployment cost $10 million.Space to launch a network of satellites for global encrypted communications following the quantum revolution.

Investment in ColibriTD attempts to boost semiconductor wafer yields using quantum power.

Future: Ethics, Engineering, and Financial Momentum A commitment to quantum ethics distinguishes EeroQ. According to SEALSQ's goal of establishing reliable, human-centric technological ecosystems, co-founder Faye Wattleton's company has been studying ethical frameworks for responsible quantum development since 2018. Technical leadership at EeroQ includes Princeton University professor CTO Steve Lyon and Chief Science Officer Johannes Pollanen, who just completed a 9,600-square-foot Chicago research and development center.

SEALSQ's strong financial performance reflects this strategy. Sales rose 66% in 2025, and cash reserves exceeded 425 million. By 2028, SEALSQ's commercial pipeline will exceed $200 million, suggesting market demand for secure and post-quantum semiconductor technology.

Despite the excitement, industry observers warn that technological and materials science challenges must be overcome before quantum systems can be widely employed commercially for years. By combining safe post-quantum cryptography with cutting-edge qubit architecture, SEALSQ is leading the cybersecurity-next-generation computing convergence.

With Single Electron Control Above 1 Kelvin, EeroQ Launches Quantum Computing Era EeroQ is quantum computing

The electron-on-helium platform built by quantum computing startup EeroQ achieved substantial experimental success. This achievement, which successfully traps, detects, and manipulates electrons at temperatures above 1 Kelvin (K), may solve one of the most persistent and important engineering problems with scalable quantum systems: extremely low cooling temperatures.

Researchers at EeroQ have raised the operational temperature of this control mechanism by more than two orders of magnitude, surpassing prior tests that used dilution refrigerators approaching 10 mK.

Overcoming Cooling Hurdle

Top quantum technologies like spin-based and superconducting qubits must run near absolute zero to reduce thermal noise. Maintaining these incredibly low temperatures is challenging to scale due to internal heat loss and costly refrigeration equipment. Due of their poor chilling power, ordinary dilution refrigerators cannot perform successfully over 1 K, restricting scalability. By demonstrating coherent electron control over 1 K in a continuous-flow cryostat at 1.10 K, EeroQ shows a path to more powerful quantum processors. Cryostats above 1 K can cool beyond 100 mW.

Helium-Electron Architecture

EeroQ, a 2017 Chicago startup, is developing a processor architecture using single electrons floating on superfluid helium. Physics values this system as one of the purest environments for storing and changing quantum information due to the electron environment's intrinsic purity and electron spin states' expected long lifetime. This demonstration experiment used on-chip. This approach works with superconducting microwave circuits, according to EeroQ. The company's long-term goal is to deliver quantum computers with high scalability and realistic operating conditions. The findings support theoretical expectations that electron-on-helium qubits can have long coherence durations and simplify system integration. The spin state of an electron trapped on helium should have strong, extended coherence lengths even at temperatures above 1 K.

Single-electron dispersive sensing

The detection method relies on a Coplanar Waveguide (CPW) resonator for charge sensing. Above a thin layer of superfluid helium, gate electrodes printed beneath the cryogen surface trap electrons. The cavity's resonance properties alter when electrons are trapped due to the resonator's fluctuating electric field, causing an observable dispersive frequency shift. The electron system's electric susceptibility changes the trap volume's polarization, raising the resonator capacitance and lowering the frequency. A high-resistivity silicon wafer was used to build the experimental device, which has a long superfluid helium microchannel and an electron trap. This microchannel operates as an extended electron reservoir and can accurately load a small number of charges into the trap using customized voltage sweeps across gate electrodes like the Split Gate and Unload Gate.

Making Single-Electron Control Deterministic

Researchers demonstrated the ability to load and unload tens of electrons. FEM research showed that the trap could contain approximately electrons under certain voltage settings, causing a 17-kHz frequency shift, which matched theoretical modeling. The researchers isolated electrons by lowering bias and carefully regulating confinement potential. The resonator frequency changed irreversibly when the Unload Gate voltage was swept negatively. This revealed plateaus for different numbers of trapped electrons, culminating in a plateau for a single electron. A single electron's absolute frequency shift peaked at approximately. This change is highest when the electron motional frequency is closest to the resonator frequency. A 0.45 aF effective single-electron capacitance change was determined, which is similar to the sensitivity of the most advanced rf-SET charge sensors. Importantly, EeroQ's device's single electron-resonator coupling energy was 9.8 MHz, two times higher than earlier cQED tests using electrons on helium. The researchers confirmed reproducible single electron control with great detection sensitivity and no control cycle errors after many loading and unloading cycles.

Future Quantum Uses

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