- Midwest Transplant Network
- Midwestern University
- MIEMSS Maryland Institute for EMSS)
- Migrant Health Service
- Mike O'Callaghan Military Medical Center
- Mike's American Grill, Springfield, VA
- Milam and Company Painting, Inc.
- Mile High United Way, Inc.
- Miles College
- Miles Media Group, Inc.
- Miles-McClellan
- Milford Area United Way
- Milford Regional Medical Center
- Military Officers Association
- Military Operations Research Society
- Military Sealift Command
- Milk Co., Inc.
- Millard Fillmore Suburban Hospital
- MillCraft Group
- Millcreek Community Hospital
- Millennium Digital Media Holdings LLC
- Millennium Hotel Cincinnati
- Millennium Hotels and Resorts
- Miller and Shook Companies
- Miller and Wade Group
- Miller Children's and Women's Hospital Long Beach
- Miller Creative Group
- Miller Group Media
- Miller High School
- Millers Information Systems
- Millikin University
- Milliman USA
- Millinocket Regional Hospital
- Million Dollar Round Table
- Mills Peninsula Medical Center
- Milstone Biomedical Associates
- Miltec
- Milton Hospital
- Milwaukee - Residence Inn by Marriott
- MIMS International
- Minden Medical Center
- Mindshare
- Mine Safety Appliances Company
- Ministry Door County Memorial Hospital
- Minnesota Society of Association Executives
- Minnesota State University School of Nursing, Mankato
- Minnesota Virtual Academy
- Minnie Hamilton Health Care Center
- Minnie Hamilton Health Center
- Miqnuchi Perez Glusti