Beef prices are a critical concern to Americans, and a priority for this Justice Department, a matter of critical concern to the American public, and a priority for the United States Department of Justice. s 80/20 Ground Beef Tray, Publix Market Ground Beef, Walmart The department's Antitrust Division announced the expanded probe Tuesday in a post on X, confirming that letters had been sent to Kroger, Walmart , Publix, Albertsons, Aldi, Ahold Delhaize USA, Costco and Amazon . signed the letters, which were dated July 16, according to copies obtained by Newsweek.