Major retailers are now part of a broader investigation. Several well-known companies are being examined. Ahold Delhaize, Aldi, and Albertsons are among those involved.

The investigation also includes Amazon and Costco. Other retailers such as Kroger and Publix are also being looked at. Walmart is another company under scrutiny.

Further information about the investigation is available from the source, including details about the companies and the scope of the inquiry.