Women in business are taking on more leadership positions throughout America’s free enterprise system. Their talent and leadership are critical to our economy’s success and the development of a 21st century workforce. In partnership with Georgetown University's Dr. Catherine Tinsley, the U.S. Chamber of Commerce is proud to feature this insightful report on women who are leading America’s companies. This report makes it clear that women are advancing to the top in a variety of industries and in companies of all sizes.This report examines women’s participation and compensation in the top management ranks of S&P small-cap 600, S&P mid-cap 400, and S&P large-cap 500 companies.