- IMC Global
- Immanuel Residences
- Insight Chicago
- Institute of Environmental Sciences and Technology
- International Association of Lighting Designers
- International Marketing Managers
- International Truck and Engine-Navistar
- Iroquois Memorial Hospital
- Iroquois-Kankakee Regional Office of Education I-KAN)
- ITW Shakeproof Automative
- J Schlegel Marketing Inc.
- Jacksonville Memorial
- Javon Bea Hospital-Rockton
- Jessie Brown VA Hospital
- Jewel-Osco
- Jodi Eisenstadt, JD, SPHR
- John H. Stroger, Jr. Hospital of Cook County
- John Wood Community College District 539
- Joliet Junior College
- Joseph Gardner
- Kankakee Community College
- Kewanee Area United Way
- Kishwaukee United Way
- Kmart
- Knox College
- Krez Group
- Lake County
- Lake County Board
- Lake Land College
- Lane Management Properties
- Lawndale Christian Health Center
- Levy-Premier Security
- Lewis University
- Life Fitness
- LifeGoesOn Organ-Tissue Donor Program
- LifeSource-IL
- Lincoln Memorial
- Lisle Convention and Visitors Bureau, Inc.
- Living Bond, Inc.
- Loyola University Chicago
- Loyola University Chicago Students for Organ Donation
- Loyola University Medical Center
- Loyola University Medical Center - Heart Transplantation
- MacMurray College
- MacNeal Hospital
- Magellan Health Services
- Marion Drury Inn
- Marketing Group, Inc.
- McDonough County United Way
- McDonough District Hospital