Politics and Business magazines
- Metrocall, Inc.
- Metromedia Companies
- Métropole T
- Métropole Télévision
- Metropolitan Baseball Club Inc.
- Metropolitan Financial Corporation
- Metropolitan Opera Association, Inc.
- Metropolitan Transportation Authority
- Metsä-Serla Oy
- Mettler-Toledo International Inc.
- Mexican Restaurants, Inc.
- Meyer International Holdings, Ltd.
- MFS Communications Company, Inc.
- MGIC Investment Corp.
- MGM Grand Inc.
- MGM/UA Communications Company
- Michael Anthony Jewelers, Inc.
- Michael C. Fina Co., Inc.
- Michael Foods, Inc.
- Michael Page International plc