Michelle Gloeckler

In her current role since June 2014, Gloeckler over­sees strategy for Wal­mart U.S.’s health and wellness business, as well as merchandising for segments such as beauty. She manages a whopping $78 billion of the company’s revenue. Gloeckler is also leading Walmart’s initiative to buy $250 bil­lion of domestic-made products in the next decade.

For more on newcomers and returns to the list, read “Who's on? Who's off? Fortune's list of the Most Powerful Women has plenty of changes.”