Arqit and Sirius Selected for NATO Secure-Networking Services

On October 20, 2026, Arqit Quantum Inc. announced an undisclosed strategic investment in Sirius Computer, Inc., linking Arqit’s quantum-safe communications technology with Sirius’s secure-computing work. The companies said they were selected as part of a winning consortium for NATO secure-networking services. The announcement describes a procurement foothold, but does not identify the value, scope, solicitation number, or performance schedule of the NATO work.

The collaboration centers on Crux, a quantum-safe secure communications platform intended for defense and government users. Arqit said the investment is intended to accelerate the platform and build on its existing partnership with Sirius. Paul Feenan, Arqit’s General Manager for Defence & Government, said: “Investing in Sirius will help us build on our existing partnership to make quantum-safe communications easier to deploy and extend to more defence users.” The stated focus on easier deployment and broader defense use is relevant to agencies and integrators evaluating secure communications capabilities, though the announcement provides no technical specifications or deployment details.

The companies plan to pursue additional work with the UK Ministry of Defence (UK MoD), the U.S. Department of Defense (DoD), and other allied customers. Those pursuits are prospective: the source does not identify an open solicitation, procurement timeline, customer requirement, or commitment by either department. The NATO selection could provide a reference point for later secure-networking bids, but it should not be interpreted as confirmation that the consortium has won separate UK or U.S. work.

For government contractors, the development is a signal to monitor quantum-safe communications and secure-networking requirements across NATO and allied defense markets. Potential teammates can assess whether Crux or complementary integration, cybersecurity, and secure-computing services fit their offerings, while validating any claims against future procurement documents. Because the investment amount and NATO contract details are undisclosed, firms should treat the announcement as an indicator of partnership activity and market positioning—not as a priced opportunity or a basis for estimating contract demand.

• Arqit Quantum Inc. announced an undisclosed strategic investment in Sirius Computer, Inc. on October 20, 2026.
• The companies said they were selected as part of a winning consortium for NATO secure-networking services.
• The work is associated with Crux, a quantum-safe secure communications platform for defense and government users.
• No investment amount, NATO contract value, solicitation number, or procurement schedule was provided.
• Arqit said the investment will build on its existing partnership with Sirius and help make quantum-safe communications easier to deploy.
• The companies plan to pursue further opportunities with the UK Ministry of Defence, the U.S. Department of Defense, and other allied customers; these remain prospective.
• The NATO selection may provide a reference point for future allied secure-networking pursuits, but does not establish a separate UK or U.S. award.
• Potential teammates should monitor future requirements and assess fit for quantum-safe communications, secure computing, and related integration work.
• Contractors should wait for procurement documents to confirm scope, eligibility, schedule, and customer requirements before treating this as an actionable solicitation.