Purpose – The purpose of this paper is to explore how an environmental threat (possible quotas for female supervisory directors) might change supervisory board gender composition in SBF120 French company boards between 2008 and 2010. Design/methodology/approach – From a census of supervisory board membership of SBF120 companies in France in January 2008 and December 2010, data were obtained to test hypotheses relating to changes in gender composition of boards and demographic differences between new and earlier director appointees. The authors drew on institutional theory to inform the discussion of this paper’s findings. Findings – The authors reveal significant increases over 2008-2010 in SBF120 board female representation and significant cohort differences between recent and earlier appointees. Newer female appointees differed from male peers and from earlier appointed females and males, bringing youth and international experience. New females were more likely to gain CAC40 seats than their male peers. There was an increase in boards with multiple female directors. Research limitations/implications – Actual motivations for increase in female appointments are unknown, but institutional theory provides possible explanations, as suggestion of coercive forces loomed. Chairmen of larger firms may have made strategic choices to attract younger and English-speaking foreign women, before the rush. Limitations include the descriptive nature of the paper, but it sets a benchmark for later studies to monitor progress in depth. Practical implications – The talent pool for female directors has widened to include foreign English-speaking women, bringing a range of new insights and experience of international governance practice to traditional French boardrooms. However, this could be seen as further discriminatory practice that requires female appointees to bring more human and social capital than that required of their male peers. Originality/value – This is the first paper charting the changes in supervisory board composition during the three-year period of environmental unrest as quotas were proposed and legislated in France and comparing new and existing cohort French director demographics.