- Lutheran Theological Southern Seminary116
- Lysol1
- Maine Development Commission1
- Mapleine1
- Margaretta Childs Archives at Historic Charleston Foundation3
- Marion Harris Neil1
- Maxwell House, Brooklyn, New York1
- Maytag1
- McConnon & Co.1
- Merrell-Soul Co.1
- Metropolitan Life Insurance Company Press1
- Metropolitan Life Insurance Company, New York1
- Middleton Place Foundation50
- Miller & Hart1
- 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