- Athens-Limestone Hospital
- Atherton Baptist Homes
- Athol Hospital
- ATK Launch Systems
- Atkinson and Co, LTD
- Atlanta - Hilton Garden Inn Perimeter Center, GA
- Atlanta Airport - Fairfield Inn by Marriott, GA
- Atlanta Convention and Visitors Bureau
- Atlanta Corporate Interior
- Atlanta Marriott Gwinnett Place, Duluth
- Atlanta Metropolitan State College
- Atlanta Midtown Residence Inn, Atlanta
- Atlanta-Gwinnett Mall - Fairfield Inn by Marriott
- Atlanta-Northlake - Fairfield Inn by Marriott
- Atlanta-Northwest - Fairfield Inn by Marriott
- Atlanta-Peachtree Corners - Fairfield Inn by Marriott
- Atlanta-Southlake - Fairfield Inn by Marriott
- Atlantic Appliance Company
- Atlantic Bottling
- Atlantic City
- Atlantic City Convention and Visitors Authority
- Atlantic Coca-Cola Bottling Company
- Atlantic Skyline
- Atlantic Stewardship Bank
- Atlantic Video Inc
- AtlantiCare Regional Medical Center
- Atlas Copco
- Atlas Precision, Inc.
- Atlas Software Technologies
- Atmore Community Hospital
- ATP Oil and Gas Corporation
- Atrium
- Atrium Health
- Atrium Health Lincoln
- Atrium Health Pineville
- Atrium Health Union
- Atrium Health University City
- Atrium Medical Center
- ATSF - American Tissue Services Foundation
- Attainium Corp
- Attentive Home Health
- Aubrey Rose Hollenkamp Children's Trust
- Auburn Community Hospital
- Audi of Alexandria
- Audience Response Systems, Inc.
- Audrain Medical Center
- Audubon County Memorial Hospital
- Augusta Aviation, Incorporated
- Augusta Health
- Augusta Metropolitan Convention and Visitors Bureau