- Lube Lizard
- Lubrizol Corp.
- Luby's
- Lucas County
- Lucas County Health Center
- Lucent Technologies-Holmdel, NJ
- Lucent Technologies-Murray Hill, NJ
- Lucid Consulting Group
- Lucile Packard Children's Hospital Stanford
- Lucy Corr Village
- Lugo Construction Inc.
- Lujack's Northpark Auto Plaza
- Luk-Aftermarket Service, Inc
- Lumec
- Lumetra
- Luminis Health Doctors Community Medical Center
- Lunenburg County Community Health Center
- Lung Diagnostics Ltd.
- Lupus Foundation of America
- Lupus Foundation of America, Greater Washington Chapter
- Lurie Children's Hospital of Chicago
- Lustar Dyeing And Finishing Corporation
- Lutheran Heart Center
- Lutheran Home Livonia
- Lutheran Home Monroe
- Lutheran Homes and Health Services, Inc.
- Lutheran Homes of Oconomowoc
- Lutheran Hospital of Indiana
- Lutheran Medical Center - SCL Health
- 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