Its in-depth report into Ambition and Gender at Work makes a compelling business case for encouraging more women to reach the top. Out of the total 1,076 director positions in the FTSE-100 last year, only 135 were held by female directors according to research by Cranfield University. The picture is even worse in the FTSE 250, where just 7.3% of directors are female. In addition, women hold just 22% of senior management posts.