"These four women on our list are leading the way for others and providing optimism for the next generation of future women bosses," Mark Di-Toro, a Glassdoor spokesperson, told CNBC via email.
With 8 percent of the 2016's ranking being held by women, this "significantly outpaces" the amount of female CEOs found on the S&P 500 list, Di-Toro added, which is currently at 4.2 percent, according to Catalyst.
The results were based on employee reviews, uploaded on Glassdoor during May 2, 2015 to May 1, 2016. During the review, employees were asked to provide anonymous feedback on their employer and company, including comments on the work environment and management, and being asked whether they approve, disapprove or have no opinion of their CEO.
"What we learn (from these reviews) is quite simple. A good CEO leads from the front, is dedicated to delivering the company mission, believes in transparency and invests in their people," Di-Toro added.