This is the fourth annual report on the state of women in corporate America conducted by McKinsey & Company and LeanIn.Org. Two hundred seventy nine companies employing more than 13 million people shared their pipeline data and completed a survey of their HR practices. In addition, more than 64,000 employees were surveyed on their workplace experiences, and the authors interviewed women of different races and ethnicities and LGBTQ women for additional insights. Since 2015, 462 companies employing almost 20 million people have participated in the study.