Every week it seems, another major U.S. retailer says it's been hacked. Today, Staples said it was investigating a potential credit-card breach. Two weeks earlier it was Kmart. Three weeks earlier it was Supervalu and Albertsons. A month ago it was Home Depot. The list is longer than the checkout line at Target, which was breached late last year.
What may not be apparent amid the deluge of bad news is who's not on the list. While scores of household names have fallen victim to hackers, some pillars of U.S. retail have managed to stay out of the headlines. So far.