- Marriott International, Inc.
- Marriott Memphis
- Marriott Orlando Airport
- Marriott Residence Inn, Norfolk
- Marriott Residence Inn, Williamsburg
- Marriott San Francisco Fisherman's Wharf
- Marriott San Mateo San Francisco Airport
- Marriott Somerset Hotel
- Marriott St. Louis West, St. Louis MO
- Marriott Trumbull
- Marriott Waterford, Oklahoma City
- Marriott Ypsilanti at Eagle Crest
- Marriott's Bay Point Resort Village, Panama City Beach
- Marriott, Houston Hobby Airport)
- Marriott, Tucson
- Marrow Foundation
- Marsh Supermarkets, LLC
- Marsh USA, Inc.
- Marshall and Roth, PLLC
- Marshall Dennehey Warner Coleman and Goggin
- Marshall Management Inc.
- Marshall Medical Center
- Marshall Medical Center North
- Marshall Medical Center South
- Marshall Murdaugh Marketing
- Marshall United Way
- Marshalltown Area United Way
- Marshfield Area United Way
- Marshfield Medical Center
- Marshfield Medical Center - Eau Claire
- Martin Hospital South
- Martin Luther King Jr. Community Hospital
- Martin Luther King, Jr. Community Hospital
- Martin Medical Center
- Martinsburg VA Medical Center
- Mary & Elizabeth Hospital
- Mary Beth Scialabba
- Mary Breckinridge Appalachian Regional Hospital
- Mary Cadman MT, CCRA
- Mary E Bivins Foundation
- Mary Greeley Medical Center
- Mary Kay
- Mary Lanning Healthcare
- Mary Rutan Hospital
- Mary Starke Harper Geriatric Psychiatry Center
- Mary Washington Hospital
- Maryland Center for Maternal and Child Health
- Maryland Community Health System
- Maryland Department of Business Economic Development
- Maryland Department of Health And Mental Hygiene