Target's former CEO held on for four months before leaving in May 2014 in the wake of a major data breach at the retailer in late 2013.
But Anthem's CEO did not leave that company after a 2015 data breach that exposed personal information for 79 million people.
The second-largest U.S. insurer recently settled with victims of the hack for $115 million, the biggest data breach settlement yet.
For starters, Equifax waited 40 days from the time it discovered the breach in late July to its public disclosure on Sept. 7.
Waiting 40 days "is pushing it," said Nathan Taylor, a cybersecurity lawyer at Morrison Foerster who has represented big companies in data breaches.
Equifax's hack affected as many as 143 million people, including personal identifying information such as Social Security numbers, names and birth dates.
Worse, says Yale School of Management professor Jeffrey Sonnenfeld, the company appeared to have no clear CEO succession plan. »