- Lowe's
- Lowell General Hospital - Main Campus
- Lowell General Hospital Saints Campus
- Lowenstein Sandler
- Lower Bucks Hospital
- Lower Chattahouchee AAA
- Lower Colorado River
- Lowndes County
- Loyola University Chicago
- Loyola University Chicago Students for Organ Donation
- Loyola University Medical Center
- Loyola University Medical Center - Heart Transplantation
- LPA Sacramento, Inc.
- LRG, Inc.
- LSA-SQL Laboratory Sciences of AZ
- LSS at Heisinger Bluff
- LSSI Library Systems and Services
- LStar Management
- LSU Health Shreveport
- LTC Alliance, LLC
- LTD Management Company, Inc.
- Lubbock Area United Way, Inc.
- 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
- 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