This article examines how EU rights and laws serve as legal opportunity structures for women’s rights activists in Europe. Further, it examines what effects this transnational activism has on the permanence and inclusion of public interests and gender equality in EU legal and political processes. The analysis examines the legal domain of EU women’s rights over a thirty-year period. Methodologically, the study relies on case law analysis, primary document collections, and interviews with non-governmental organizations and governmental elites at both the EU and the national level. I ask how legal mobilization can serve as a catalyst for institutional change (by influencing litigation and legislative action), and how this effects subsequent EU-level women’s rights mobilization and public inclusion.