Female CEOs of large firms are a rare breed. In the US in 2015, there were more CEOs called John running big companies in the US than women. In 2016, there were only six female CEOs in the firms covered by the FTSE 100 index and 12 in the FTSE 250 index. In the FTSE 100, there were only four women chairs, 185 women on the executive committee out of 991 positions, and 283 board members out of 1,065 positions.
There is a similar, but not as stark, underrepresentation in the UK public sector. For example, I recently published a report