- Meriweather County, Department of Family and Children Services
- Mery Medical Center
- Mesa Arizona Convention and Visitors Bureau
- Mesa County Workforce Center
- Mesa County, Department of Human Services
- Mesa Public Schools
- Mesa United Way
- Mesa View Regional Hospital
- Mesilla Valley Hospice
- Mess. Service, Inc.
- Messiah Village
- Messier Services
- MET - West
- Met-Pro Corp.
- Metabolism Associates
- Metairie Manor
- Methodist Ambulatory Surgery Hospital - Medical Center
- Methodist Children's Hospital
- Methodist College
- Methodist Healthcare
- Methodist Heart Hospital
- Methodist Hospital
- Methodist Hospital
- Methodist Hospital
- Methodist Hospital Northeast
- Methodist Hospital of Southern California
- Methodist Hospital Olive Branch
- Methodist Hospital South
- Methodist Hospitals Norhtlake Campus
- Methodist Hospitals Northlake Campus
- Methodist Hospitals of Dallas
- Methodist Hospitals of Dallas - Data Coordination
- Methodist Hospitals Southlake Campus
- Methodist Jennie Edmundson
- Methodist Le Bonheur Germantown Hospital
- Methodist Medical Center of Oak Ridge
- Methodist North Hospital
- Methodist South Hospital
- Methodist Specialty and Transplant Hospital
- Methodist Stone Oak Hospital
- Methodist Texsan Hospital
- Methodist United Hospital
- Methodist University Hospital Transplant Institute
- Methodist West
- MetLife
- MetLife Financial Services
- Metro Atlanta Chamber of Commerce
- Metro Atlanta Ministerial Alliance
- Metro Community College
- Metro Health Center