WISeKey International Holding Ltd and its subsidiary SEALSQ Corp announced that their jointly established special purpose vehicle, Quantisimo Corp, has entered into a non-binding Letter of Intent with GigCapital8 Corp. The proposed transaction aims to establish a Nasdaq-listed strategic quantum technology platform with a pre-money enterprise value of approximately $575 million. The parties intend to increase this valuation to $2 billion through the build-up consolidation of up to five additional quantum companies.

The business combination between Quantisimo and GigCapital8 is currently expected to close during the first quarter of 2027. Quantisimo was created to build a Trusted Quantum Pure-Play platform, leveraging proprietary technologies, strategic investments, and assets from the SealQuantum.com portfolio. The platform is designed to provide investors with direct exposure to the quantum economy, focusing on the development and deployment of trusted quantum technologies.

Strategic Vision and Market Context

The strategic vision for Quantisimo is supported by the Executive Order ‘Ushering in the Next Frontier of Quantum Innovation’ signed on June 22, 2026. This policy is expected to accelerate quantum computing, sensing, and networking, thereby expanding market opportunities and public-private partnerships. Quantisimo aims to capitalize on this momentum by offering quantum-enabled applications and post-quantum security solutions.

Transaction Details and Future Plans

The following table outlines the key financial and strategic targets of the proposed transaction:

SEALSQ is expected to contribute selected assets and strategic interests from its SealQuantum.com portfolio to Quantisimo, subject to the completion of the business combination and board approvals. These contributions include investments, technologies, and intellectual property intended to strengthen Quantisimo's position in the quantum ecosystem.

Management Commentary

Carlos Creus Moreira, Founder and CEO of WISeKey and Chairman of SEALSQ, emphasized the transformative potential of the quantum age. He stated that the partnership with GigCapital Global is designed to accelerate scale and enhance market access. Dr. Avi Katz, Founder and CEO of GigCapital Global, highlighted that Quantisimo represents a unique opportunity to create a public company focused on the emerging quantum economy for military and commercial markets.

The proposed transaction remains subject to the execution of definitive agreements, regulatory approvals, shareholder approvals, and other customary closing conditions. There can be no assurance that the transaction will be completed.

WISeKey International Holding Ltd's subsidiary, WISeSat.Space, has participated in the latest financing round of FOSSA Systems, S.L., a Spain-based aerospace and defence company. The investment, announced on June 25, 2026, reinforces WISeSat's objective to build a European-rooted secure satellite infrastructure platform. This strategic move builds on a relationship established in 2021, focusing on the development of small-satellite platforms for secure IoT communications from Low Earth Orbit (LEO).

The partnership has enabled WISeSat to build an early satellite access base across 25 launched LEO satellites, with access to 8 satellites currently in operation. These missions have supported WISeSat's pilot testing, technical validation, and flight-heritage programme. The latest investment reaffirms confidence in FOSSA's small-satellite capabilities and strengthens the industrial relationship between the two entities.

WISeSat operates within WISeKey's ecosystem, which integrates cybersecurity, digital identity, semiconductors, and post-quantum technology. SEALSQ Corp., another WISeKey subsidiary, focuses on semiconductors and post-quantum technology products. While WISeSat's investment in FOSSA is a strategic move by WISeSat, it aligns with the broader objective of developing secure, trusted, and quantum-resilient infrastructure across semiconductor, cybersecurity, and space layers.

SEALSQ's planned Quantum Spatial Orbital Cloud (QSOC) is expected to utilize WISeSat satellite capacity and infrastructure for future orbital layer services. These services may include quantum key distribution (QKD), quantum random number generation (QRNG), and post-quantum identity. However, any such use remains subject to definitive agreements, technical validation, financing, regulatory approvals, launch cadence, and customer demand.

Carlos Moreira, Founder and CEO of WISeKey, highlighted the importance of the investment in de-risking execution and accelerating the roadmap. He emphasized the growing market opportunity for sovereign, resilient, and secure space-based communications in Europe. Julián Fernández, CEO of FOSSA Systems, welcomed the continued support and expressed anticipation for further cooperation in small-satellite infrastructure and secure communications.

Key Details of the Partnership

Strategic Context and Future Outlook

The investment comes amid Europe's increased emphasis on resilient, sovereign, and secure space capabilities. WISeSat's roadmap focuses on providing satellite capacity, orbital infrastructure, and ground-segment capabilities for secure communications and IoT connectivity. The integration with WISeKey's Root of Trust and SEALSQ's post-quantum semiconductor capabilities aims to position the company to capture long-term value in secure communications and future quantum-resilient applications.