Kroger announced the resignation of CEO Rodney McMullen, citing issues related to his personal conduct. Sign up for our Newsletters The board of directors started an investigation last month. Company officials have not said what kind of personal conduct led to McMullen's resignation,

Kroger board member Ron Sargent is taking the helm at the nation’s largest supermarket chain as questions about former CEO Rodney Mullen continue.

Kroger CEO Rodney McMullen is resigning following a probe into his personal conduct, the grocery chain said Monday. McMullen, who was both the chairman and CEO, is out after a company board investigation found that his personal conduct,