- A.C.E. Data Information Service
- Aardvark Displays
- Actsoft
- Advanced Answers On Demand, Inc.
- Advent Christian Village
- AdventHealth
- AdventHealth Altamonte Springs
- AdventHealth Apopka
- AdventHealth Carrollwood
- AdventHealth Celebration
- AdventHealth Dade City
- AdventHealth Daytona Beach
- AdventHealth DeLand
- AdventHealth East Orlando
- AdventHealth Fish Memorial
- AdventHealth Heart of Florida
- AdventHealth Kissimmee
- AdventHealth Lake Mary ER
- AdventHealth Lake Placid
- AdventHealth Lake Wales
- AdventHealth New Smyrna Beach
- AdventHealth North Pinellas
- AdventHealth Orlando
- AdventHealth Palm Coast
- AdventHealth Sebring
- AdventHealth Tampa
- AdventHealth Transplant Institute
- AdventHealth Waterman
- AdventHealth Wauchula
- AdventHealth Wesley Chapel
- AdventHealth Winter Garden
- AdventHealth Winter Park
- AdventHealth Zephryhills
- AdventHealth Zephyrhills
- Adventist Health Delano
- Aetna Hispanic Network
- Aetna of Weston, Florida
- Aetna Volunteer Council
- African American Chamber of Commerce of Central Florida
- Air Force Enlisted Village
- Alachua County Sheriff Office
- Alachua County Visitors and Convention Bureau
- Albertson's Inc. Eastern Division)
- Alhambra Investments
- All Systems Communications
- Amadeus
- AMCO Water Metering Systems
- Amelia Island
- American Data and Computer Products, Inc.
- APCO International