David Kasnic for The Wall Street Journal (6); Brooklyn Nets (Yormark)
When Frank Bisignano took the CEO job at First Data Corp. in Atlanta in late April, he brought his Brooks Brothers suits and Hermès ties with him. It's too soon to know if he can turn around the unprofitable credit-card processor, but he seems to be upending its style. Mr. Bisignano wears formal business attire to work every day, and many employees who weren't previously dressing up are now, literally, following suit.