Most Powerful Women in Banking: No. 4, Mary Mack, Wells Fargo
Making banking easier for every customer is the mission of Mary Mack, who leads 67,000 employees in Wells Fargo's consumer and small-business banking division. Last year, Mack led the app's relaunch, making it easier to use and more secure for Wells customers. "There are alerts and speed bumps along the way to prevent fraud," she says.