The Department of Justice has expanded an investigation into beef prices. Several major retailers are now under scrutiny. These retailers include well-known companies such as Walmart, Costco, and Amazon.

The list of retailers being investigated also includes Kroger, Publix, Albertsons, Aldi, and Ahold Delhaize. The Department of Justice has identified these companies as part of the expanded investigation.

Further details about the investigation are available from the source. The Department of Justice has not provided additional information about the scope or focus of the investigation beyond the list of retailers involved.