Evolving ESG Constraints on Defence and Dual‑Use Investment in Europe

Over the past decade, investment in the defence and dual-use technology sectors has shifted from being a marginal and often excluded domain within responsible finance to a contested and structurally regulated area of capital allocation. European asset managers are no longer dealing with defence merely as an ethical anomaly, but as a complex industrial system embedded in legal obligations, geopolitical realities, and strategic autonomy objectives. This transformation has not resulted in a uniform relaxation of constraints, but rather in the construction of increasingly formalised, rule-based governance frameworks that define when, how, and under which conditions defence-related activities may be considered investable. Revenue thresholds, activity classifications, treaty-based exclusions, and layered due-diligence processes have replaced broad moral prohibitions, producing a differentiated landscape of access to capital.

At the same time, the rise of dual-use technologies such as artificial intelligence, aerospace systems, and advanced electronics has blurred the distinction between civilian and military value chains, complicating ESG risk assessment and investment decisions. Within this context, asset managers are forced to reconcile regulatory compliance, reputational risk, and national security considerations, while investors and policymakers confront the systemic implications of these choices for European defence-industrial resilience and technological sovereignty. European asset managers are moving from broad ethical prohibitions on defence investments toward granular, rules-based ESG frameworks anchored in legal definitions and quantitative criteria. Historically, many ESG funds outright avoided defence stocks as a matter of principle [1] [2] .

This blanket exclusion has given way to more nuanced policies that distinguish what type of defence activity is permissible and how much exposure is tolerated. The change is evident in formal exclusion lists and revenue-based thresholds that asset managers now deploy to operationalize policy.