- Mount Sinai Queens
- Mount Sinai South Nassau
- Mount Sinai St. Luke's
- Mount Sinai Transplant
- Mount Sinai West
- Mount Snow Condos, West Dover VT
- Mount St. Mary's Hospital and Health Center
- Mount Vernon Lee Enterprises, Inc.
- Mount Zion Nashville
- Mount Zion United Methodist Church
- Mountain Area Health Education Center MAHEC)
- Mountain Comprehensive Health Corporation
- Mountain Health Care, Inc.
- Mountain Neurological Center
- Mountain Pacific Association of Colleges and Employers
- Mountain Power Electrical Contractor, Inc.
- Mountain Radiation Oncology, PA
- Mountain Region Donor Services
- Mountain Regional Ear, Nose, Throat
- Mountain Ridge Wellness Center
- Mountain Star Healthcare
- Mountain View Gastroenterology
- Mountain View Hospital
- Mountain View Regional Hospital
- Mountain View Tire and Service - East Asheville
- Mountain View Tire and Service - Hendersonville
- Mountain View Tire and Service - North Asheville
- Mountain View Tire and Service - South Asheville
- Mountain View Tire and Service - Waynesville
- Mountain View Tire and Service - West Asheville
- Mountain Vista Medical Center
- Mountainlands Community Health Center
- Mountains Community Hospital
- Mountainside Residential Care Center
- MountainView Hospital
- MountainView Regional Medical Center
- MoveN Software, Inc.
- Mower
- MPI-The Meeting Professional Magazine
- MPW
- MRC Bearings, Inc
- MRI Technologies
- MS Baptist Medical Center
- MSJ OccuMed
- Mt. Ascutney Hospital
- MTC Technologies
- MTF Biologics - Jessup
- MTF Biologics - Main Office
- MU Sinclair School of Nursing
- Muhlenberg Regional Medical Center