The aim of this research is to describe how the gender gap is addressed in listed science, technology, engineering, and mathematics (STEM) companies. The research methodology applied to this paper is the qualitative method through the application of the case study analysis. We selected a privatal case study. Sources of analysis were data analysis by 2022 and a survey. The research delves into the theme of the female–male working gap not simply in listed companies but in those with high technological potential, within the Italian experience. This represents a novelty compared to the traditional reference literature. This paper enriches the existing literature through study and results that are a useful baseline for academic and practitioners’ implications about the evolution of the research in work gap between women and men in listed STEM enterprises.