SEALSQ Leads $10 Million PIPE Investment in WISeSat.Space

Insider Brief

• SEALSQ led a $10 million PIPE investment in WISeSat.Space that closed on October 1, 2026, alongside WISeSat.Space’s business combination.
• The investment provides WISeSat.Space with equity capital for planned satellite infrastructure expansion and integration of post-quantum security technologies across its space, ground and user segments.
• SEALSQ and WISeSat.Space plan to combine satellite capacity with secure semiconductor, cryptographic and trusted identity technologies to support post-quantum security services.

PRESS RELEASE — SEALSQ Corp (NASDAQ: LAES) (“SEALSQ” or “Company”), a company that focuses on developing and selling Semiconductors, PKI, and Post-Quantum technology hardware and software products, today announced that it led a $10 million private investment in public equity (PIPE) in WISeSat.Space Holdings Corp. (Nasdaq: SAIQ) (“WISeSat.Space”), a space technology company. The investment closed on October 1, 2026. WISeSat.Space and SEALSQ are subsidiaries of WISeQey Corp. (formerly known as WISeKey International Holding AG, “WISeQey”) (Nasdaq/SIX: WQEY), a global quantum cybersecurity and space IoT company.

The PIPE Investment closed on October 1, 2026, concurrently with the closing of the Business Combination.  The purchase price per share, equal to the redemption price, was $10.79 per share.  The Subscription Agreement includes a price-protection mechanism that may result in the issuance of additional WISeSat Ordinary Shares to SEALSQ under certain conditions if the volume-weighted average price of WISeSat Ordinary Shares for the 10 consecutive trading days ending on the 60th calendar day after Closing is below the purchase price, subject to a maximum issuance of an additional 1,073,216 shares. SEALSQ is also subject to customary lock-up restrictions under the Subscription Agreement.

The investment provides WISeSat.Space with additional equity capital as it advances its space cybersecurity strategy, including the planned expansion of its satellite infrastructure, and the integration of post-quantum cryptography (PQC) security technologies into its satellites, ground and user-segment architectures.

WISeSat.Space is engaged in the development of a new generation of WISeSat.Space satellites, intended to support trusted communications, digital identity, and data exchange through space-based infrastructure. The planned architecture is intended to integrate advanced cybersecurity capabilities with satellite communications, creating a foundation for trusted and resilient communications across space and ground infrastructure.

A key focus of the program is expected to be the development of quantum-resilient secure communications capabilities, designed to address emerging cybersecurity threats associated with the future evolution of quantum computing. By incorporating post-quantum security into the satellite communications architecture, WISeSat aims to strengthen device authentication, data integrity, and secure communications across space and ground infrastructure.

The collaboration with SEALSQ is also expected to support the development of a broader trusted space infrastructure, under which WISeSat.Space would provide satellite capacity and related space and ground infrastructure, while SEALSQ would use that capacity to support the development and delivery of planned quantum and post-quantum services using its secure semiconductor, cryptographic and trusted identity technologies.

Carlos Moreira, CEO of SEALSQ, WISeSat.Space and WISeQey noted, “This investment brings together two companies within the WISeQey group around a shared goal: making space infrastructure secure against both current and future cyber threats. For WISeSat.Space, it provides capital to advance our next generation of satellites and to build post-quantum security into our space, ground and user segments. For SEALSQ, it opens a path to deliver quantum and post-quantum services using WISeSat.Space’s satellite capacity. Together, secure semiconductors, cryptography and satellite connectivity have the potential to help set new standards for trust and security across the emerging space economy.”

John O’Hara, CFO of SEALSQ, added, “This investment supports SEALSQ’s strategy to extend the application of our secure semiconductor, cryptographic and trusted identity technologies into space-based communications. By supporting the development of WISeSat.Space’s infrastructure, we aim to create a foundation for delivering post-quantum security services across satellite and ground networks. Our focus is on translating this collaboration into commercial opportunities that support long-term value for SEALSQ shareholders.”

The new satellite program is expected to contribute to WISeSat.Space’s broader vision of bringing trust and sovereignty to space transactions, enabling secure interactions among independently operated space and terrestrial systems while strengthening the protection of critical digital assets.

Related Party Transactions
WISeQey, WISeSat.Space, and SEALSQ are affiliated companies part of the same corporate family. Carlos Moreira serves as Chief Executive Officer of each company. Accordingly, the PIPE investment and the planned collaboration between WISeSat.Space and SEALSQ described in this press release are related party transactions.