This Fast Company article from February 2018 highlights some profound results from a Global Leadership Forecast study by DDI, the Conference Board and EY. That study found that companies with greater gender diversity reported they are:

• Twice as likely to have their leaders work together to create new solutions and opportunities
• 5 times more likely to work across an organization’s silos and exhibit a growth culture
• 7 times more likely to have strong leadership
• 4 times more likely to have sustained profitable growth

More informaiton: https://www.riversoftware.com/leadership-development/encourage-more-female-leadership-by-using-mentoring/