| ADP | New Jersey |
| ADP Micro | Pennsylvania |
| AdPay, Inc. | Colorado |
| Adpearance | Oregon |
| ADPList | |
| Adplorer Marketing Solutions, LLC | Georgia |
| AdPlugg.com | California |
| AdPro | |
| Adravity | |
| AdRem Software | New York |
| Adrenas Therapeutics | North Carolina |
| Adrian Agency | |
| Adrian College | Michigan |
| Adrian State Bank | |
| Adriana Enterprises | Ohio |
| Adroit Medical Systems | Tennessee |
| Adroit Pharmaceutical Development | |
| Adroit Trading Technologies, Inc. | |
| AdRoll.com | California |
| Adron Systems, LLC | Minnesota |
| ADRx, Inc. | California |
| ADS Biosystems, Inc. | California |
| ADS Data Direct | Florida |
| ADS Data Systems | Kansas |
| ADS Solutions Distribution Software | California |
| Adscend Media, LLC | |
| AdShark | |
| ADSII | California |
| ADsmith | Missouri |
| adSoft, Inc. | Arizona |
| ADsource Full Service Advertising & Marketing | |
| AdSource Tracker | Ohio |
| AdSpeed | California |
| AdsRole, LLC | |
| ADSS Global | Pennsylvania |
| AdStage | California |
| Adstra | New Jersey |
| Adstriangle | |
| Adswerve, Inc. | Colorado |
| Adsworks | New Jersey |
| ADT Mag | California |
| Adtalem Global Education | Illinois |
| Adtaq Internet, LLC | Washington |
| Adtec Digital | Florida |
| AdTech Ceramics | Tennessee |
| Adtech IT Solutions | California |
| Adtech Systems, LLC | Ohio |
| Adtelligent, Inc. | Delaware |
| Adtheon | |
| AdTheorent | New York |