Critical Single-Source Dependencies in European Missile Defence Supply Chains

European missile defence capabilities increasingly depend on complex, multi-layered industrial ecosystems in which sovereignty at the system-integration level coexists with dependence at upstream technological and material layers. While Europe has strengthened its position in the design, integration, and deployment of air and missile defence systems, there is growing concern that critical vulnerabilities persist in areas that are not immediately visible at prime-contractor level. These vulnerabilities do not necessarily take the form of general external dependence, but rather of concentrated exposures at specific points in the supply chain, where a limited number of non-European actors control essential inputs.

The central analytical problem is therefore not whether Europe depends on external suppliers in general, but whether it is exposed to single-source or near-single-source chokepoints that could materially disrupt development, production, or sustainment cycles under geopolitical or export-control pressure. The report addresses this problem through a strict evidentiary framework that distinguishes between four categories of dependency: publicly evidenced single-source dependency, near-single-source dependency, structural extra-European dependency, and unresolved dependency. It proceeds by analysing the missile defence supply chain by industrial layer, beginning with semiconductor design toolchains and fabrication dependencies, and extending to key electronic components, photonics and optical subsystems, advanced materials, and propulsion-related inputs.

Each layer is assessed against publicly available institutional, regulatory, and technical sources, with a clear separation between documented evidence and analytical inference. The report also examines the extent to which European policy instruments, including EDIP, EDIRPA, and related frameworks, reflect institutional recognition of these vulnerabilities, and whether programme-level initiatives provide indirect signals of unresolved technological or industrial gaps.