- Milnot1
- Minnesota Valley Canning Company1
- Minute Tapioca Co.1
- Minute Tapioca Co., Inc., Orange, Massachesetts
General Foods1
- Minute Tapioca Co., Inc., Orange, Massachusetts1
- Minute Tapioca Co., Inc., Orange, Massachusetts, General Foods1
- Minute Tapioca Company Inc., Orange, Massachusetts4
- Mirro-Matic1
- Modern Electric1
- Monarch1
- Monarch Electric, Malleable Iron Range Company1
- Montgomery Ward2
- Morell Ham1
- Morris College (Sumter, S.C.)40
- Mouli Manufacturing Corp.1
- Mueller2
- Murrells Inlet 2020, http://www.murrellsinletsc.com/166
- Nabisco1
- National Aluminum Manufacturing Co.1
- National Biscuit Company3