SEALSQ Corp (NASDAQ: LAES) announced an additional strategic investment in EeroQ, a quantum chip design company, and committed to serve as lead investor in EeroQ's upcoming financing round. The Geneva-based semiconductor company has made multiple investments in the U.S.-based quantum computing firm since December 2025.

EeroQ develops quantum computing architecture based on electrons on helium technology that is compatible with existing CMOS chip fabrication methods. The company recently demonstrated a control architecture capable of managing up to one million qubits with fewer than 50 physical control lines.

The investment comes from SEALSQ's Quantum Fund, an internal initiative focused on quantum computing startups in the United States and Europe. SEALSQ and EeroQ are working on integrating quantum security technologies at SEALSQ's planned Quantum Center of Excellence in Geneva, subject to regulatory approval.

"Our decision to make a further investment in EeroQ, and to lead their next financing round, reflects both the strong progress of our ongoing technology cooperation and our deep conviction in the EeroQ team and platform," said Carlos Moreira, SEALSQ's founder and CEO.

Nick Farina, EeroQ's co-founder and CEO, stated that SEALSQ's commitment "is a powerful endorsement of EeroQ's technology and long-term vision."

The partnership aims to combine SEALSQ's semiconductor hardware and post-quantum cryptography with EeroQ's helium-based quantum processor architecture. EeroQ, founded in 2017, focuses on scaling quantum computing using existing chip fabrication technology.

SEALSQ describes the investment as part of its "Quantum Highway" strategy to create integrated systems combining classical, post-quantum, and quantum processing capabilities.