Arqit Invests in Sirius to Scale Tactical Edge Quantum-Safe Networking Following NATO Contract Selection
Arqit Quantum Inc. (ARQQ) invested in Sirius Computer to scale quantum-safe networking for defense and edge computing, following a NATO contract win. The partnership combines Sirius's Crux platform with Arqit's encryption tech. Arqit reported $1M expected revenue for 2026 and $51M in cash reserves.
How this was made

The 30-second read
Why it matters
The partnership aims to integrate quantum‑safe encryption into edge‑computing and defense platforms, potentially expanding both companies' market reach.
Market read
First disclosure of a strategic investment that could enhance defense‑related quantum‑safe solutions.
What to watch
Potential regulatory scrutiny of quantum‑safe tech exports and competition from other defense encryption providers.
Background
Arqit Quantum, a provider of quantum‑safe encryption, announced a strategic investment in Sirius Computer, a tactical communications developer, following a NATO contract win.
Ticker impact
Arqit Quantum announced a strategic investment in Sirius Computer, marking a new partnership and potential revenue growth.
likely upward pressure as investors price in the new defense collaboration
The announcement is the first disclosure of the investment and could expand Arqit's defense market exposure.
Market effects
Could boost the quantum‑safe encryption and tactical networking segments within defense technology.
May benefit U.S. and European defense contractors linked to NATO projects.
Highlights growing interest in post‑quantum security for military applications worldwide.
Counterpoint
The investment size is undisclosed; market may view it as a modest strategic move rather than a major growth driver.
Key entities
- CompanyArqit Quantum Inc.
Quantum‑safe encryption provider.
- CompanySirius Computer, Inc.
Tactical communications and networking developer.


