- Lutheran SeniorLife
- Lutheran Services for the Aging Inc.
- LutherCare
- Luxe Hotels
- Luxe Rodeo Drive Hotel
- Luxe Sunset Boulevard Hotel
- Lycoming County United Way
- LYDA Builders, Inc.
- Lynch Livestock
- Lynchburg Courtyard by Marriott, VA
- Lyndon B. Johnson Space Center
- Lynn Leadership Group
- LYNX
- Lyon County Sheriff's Office
- M Davenport Associates, Inc.
- M Health Fairview Bethesda Hospital
- M.A. Bruder and Sons, Inc.
- M.G. DeLong, Inc.
- M.H. West and Company Inc.
- M.R. Beal and Co.
- Mac Aerospace Corporation
- MacGray
- Macias, Gini and Company LLP
- MacMurray College
- MacNeal Hospital
- Macomb County
- Macomb County Board of Commissioners
- Macomb County, Board of Commissioners - Roseville
- Macomb County, Board of Commissioners - Mt. Clemens
- Macon County
- Macon Program for Progress
- Macon Transit Authority
- Macro Enterprises Inc.
- Macstir Inc. dba Mac Travel
- Macys, Natrona
- Mad Dogs Enterprises
- Madera Community Hospital
- Madera County
- Madison Avenue Inc.
- Madison County
- Madison County Convention and Visitors Bureau
- Madison County Engineer's Office
- Madison County Health Care System
- Madison County Health Department
- Madison County Health Dept.
- Madison County Memorial Hospital
- Madison Hospital
- Madison Regional Health System
- MAG-LEV Transit International, Inc.
- Magee General Hospital