Accenture CEO Julie Sweet was the first woman to make the ranking, coming in at number 29. Only three other women made the list, including General Motors CEO Mary Barra, Lockheed Martin CEO Marillyn Hewson and Vertafore CEO Amy Zupon.
The ranking came from Santa Monica, Calif.,-based startup, Comparably, which collected anonymous feedback from female employees from May 23, 2017 to May 13 of this year.
There is a dearth of women CEOs overall. Only 10% of 5,700 CEOs and chief financial officers at Standard & Poor's Composite 1500 stock index are women. Women CEOs at the start of the year comprised only 5.4% of the Fortune 500, or 27.
"Our list is reflective of the fact that there needs to be more diversity of women in leadership positions," says Comparably CEO Jason Nazar. "There just aren't enough women in the highest positions of leadership. That has to change. Having conversations like this is the first step in making that happen."