Companies with at least 30% women in leadership roles may boost their net profit margins by about 15% compared with those with no female leaders. According to a new report by the Peterson Institute for International Economics and EY, which examined data from about 22,000 companies in 91 countries, the biggest gains took place when women were in senior executive positions such as CFO or COO. Companies with female CEOs but no other women in the C-suite or on the board of directors don’t perform particularly better or worse than male-run firms, the study found. Read the original story from Bloomberg.