There aren't many iconic companies out there for which the second-in-command leader, such as a chief operating officer, makes a name for him or herself apart from the chief executive officer.
Facebook COO and "Lean In" author Sheryl Sandberg is one of the few. Her business acumen and life advice have allowed her to create a personal brand distinct from her boss Mark Zuckerberg and launched her name into conversations worldwide.
While CEOs hold much of the media attention due to the weight of their responsibilities, hiring consulting company Topgrading gathered a list of the executives who support the CEOs of 25 American companies.
Based on this year's annual Fortune 500 list, which collectively represent two-thirds of the U.S. GDP, here are the five executives from Topgrading's list who made it into the top 10 companies.