- AMITA Health Saint Francis Hospital Evanston
- AMITA Health Saint Joseph Hospital Chicago
- AMITA Health Saint Joseph Hospital Elgin
- AMITA Health Saint Joseph Medical Center Joliet
- AMITA Health Saints Mary and Elizabeth Medical Center Chicago
- AMITA Health St. Alexius Medical Center
- AMITA Health St. Mary's Hospital Kankakee
- Ann & Robert H. Lurie Children's Hospital of Chicago
- Anna Belle Rose Home Decor Store
- Aon Corporation
- Apostolic Christian Skylines
- Applied Computer Technology, Inc.
- ARJO, Inc.
- Arthritis Foundation Illinois
- Arthroscopy Association of North America
- Ascension Alexian Brothers
- Ascension Mercy Aurora Hospital
- Ascension Resurrection
- Ascension Saint Mary - Chicago
- Ascension St. Alexius
- Ascension St. Franscis Evanston
- Ascension St. Franscis Evanston
- Ascension St. Joseph Joliet
- Ascension St. Joseph-Elgin
- Associated Equipment Distributors
- Association Forum
- Association Management Center
- Association of Nutrition and Foodservice Professionals
- Astellas Pharma US, Inc.
- Augustana College
- Aurora Rotary Club
- AWTP
- BAI
- Battery Council International
- Baxter International
- BelleVille
- Benedictine University
- Benevolent and Protective Order of Elks
- BioSpace
- Black Hawk College
- Blessing Health System
- Blessing Hospital
- Blue Cross and Blue Shield of Illinois
- Boeing
- Bradley University
- Bradley University Department Of Nursing
- Bridgestone-Firestone Off Road Tire Co.
- Builders Association of Greater Chicago
- Bureau County United Way, Inc.
- C.H. Johnson Consulting Inc.