Jamie Dimon criticized Wells Fargo & Co.'s lack of a succession plan when its CEO retired, during remarks at a conference on May 28.
It is "not responsible for a company ... to have a CEO leave with no plan in place," the JPMorgan Chase & Co. chief said.
Dimon, who is also JPMorgan's chairman, was speaking in response to an analyst's question about whether the regulatory oversight placed on Wells Fargo in recent years changed how he approaches managing JPMorgan, which is the largest U.S. bank by assets.
Timothy Sloan retired as Wells Fargo's CEO in March, and the company has been searching for a permanent replacement since. C. Allen Parker, Wells Fargo's general counsel, is now interim CEO.