Amidst heated discussions on EU boardroom gender quotas, the imbalance in boardroom gender representation has intensified interest in its impact on corporate performance. This study examines the influence of female board members on company outcomes, factoring in governance, corporate characteristics, and sustainability considerations. Methodology: Drawing from the Euro Stoxx 50 Index for the period 2014–2023, we employ panel data pooled OLS and fixed-effects regressions. Findings: The findings indicate that by employing the diverse knowledge and experience attributable to mixed-composition boards, boardroom diversity affects positively the corporate accounting result, with an insignificant but favourable impact on market performance. Contribution: This chapter delivers fresh business practice insights regarding the board structure impact on shareholder wealth, lending support to two well-known theories: agency theory and resource dependence theory. It also offers empirical support to national policy makers for the establishment of gender quotas and breaking through the ‘glass ceiling’ as regards traditional female society roles. Further support towards a larger diversity may come in the form of soft measures by means of work-life balance, regulatory assessment of the firm’s state of governance as well as investor-driven assessment of individual executive officer contributions to promote accountability.