Mr. Barros will stay through the transition and retire early next year, Equifax said. Equifax, which is based in Atlanta, is one of the country's so-called big three credit reporting bureaus. It maintains files on about 220 million Americans. After the data breach — and a response by the company that was widely criticized as inadequate — Equifax has continued to stumble. In January, an app it released that was meant to let people lock their credit files was riddled with glitches. This month, a former company executive was charged with insider trading for selling Equifax shares after the breach but before it was publicly disclosed. "The team has made meaningful progress in the last several months to address a number of well-publicized issues," Mr. Begor said in a statement. "I will prioritize continuing our team's efforts to communicate transparently and restore confidence with consumers, customers, shareholders and policymakers."