The study found the rate of promotion for black women is 4.9%, compared with 5.8% for Asian women, 6.0% for Hispanic women, and 7.4% for white women. Women of color are the most underrepresented group in the pipeline. They make up 19% of the U.S. population but just 6% of vice presidents, 4% of senior vice presidents, and 3% of C-suite roles. And the attrition rate—the reduction in workforce, primarily due to resignations—is higher for black women than any other group of women.