Politics and Business magazines
- Michigan Bell Telephone Co.
- Michigan National Corporation
- Michigan Sporting Goods Distributors, Inc.
- Micrel, Incorporated
- Micro Warehouse, Inc.
- MicroAge, Inc.
- Microdot Inc.
- Micros Systems, Inc.
- MicroStrategy Incorporated
- Mid-America Dairymen, Inc.
- Midas Inc.
- Midas International Corporation
- Middle East Airlines—Air Liban S.A.L.
- Middlesex Water Company
- Midway Airlines Corporation
- Midway Games, Inc.
- Midwest Express Holdings, Inc.
- Midwest Grain Products, Inc.
- Midwest Resources Inc.
- Miele & Cie. KG