Bi-Lo Holdings LLC, the Jacksonville-based parent company of the Bi-Lo, Winn-Dixie and Harveys supermarket chains, said Tuesday that Randall Onstead is stepping down as president and CEO on March 1. A successor 'has been identified and will be named publicly at a later date,' Bi-Lo spokesman Brian Wright said in an email. 'We are pleased to have Randall stay through much of the first quarter of 2015 to help with the transition process,' he said, but the company gave no other details.