Kroger Chief Executive Rodney McMullen resigned from the company following a board investigation into his personal conduct, ending a more than four-decade career at the grocery chain.Kroger, the biggest U.

Mr. McMullen’s conduct is not related to the company’s financial performance, operations or reporting, and it did not involve any Kroger associates,” the company said.

Kroger Chairman and CEO Rodney McMullen is stepping down after an internal investigation into his personal conduct.