| Admetsys Corporation | Massachusetts |
| Administration Controls Management, Inc. | Michigan |
| Administration123 | California |
| AdminiTrack.com | Georgia |
| Adminix Solutions, Inc. | |
| AdminLTE | Tennessee |
| Admins, Inc. | Massachusetts |
| Admiral | Florida |
| Admiral Consulting Group | New Jersey |
| Admiral Online | California |
| AdmissionPros | North Carolina |
| AdmitSee, Inc. | New York |
| Admon | Delaware |
| ADMOSIS, Inc. | Washington |
| AdMuncie.com | Indiana |
| Admysys, Inc. | |
| Adna Technologies | Michigan |
| AdNabu, Inc. | Delaware |
| Adnare (Pvt) Ltd | Washington |
| ADNET Technologies | Connecticut |
| adNET Technology Management | Illinois |
| Adnormal, LLC | Texas |
| ADOA-ASET | Arizona |
| Adobe | California |
| Adobe Technology Xchange | California |
| Adobe Telcom, Inc. | California |
| ADOGANDESIGN | |
| Adoko.com | Arizona |
| Adolore BioTherapeutics | |
| Adona Medical | California |
| Adone Advertising and Design | |
| Adonis Technology, Inc. | |
| Adopt the Web | |
| Adora Life Science | |
| Adorama Camera, Inc. | New York |
| Adoriasoft | |
| Adovate, LLC | |
| ADOXPRO | Mississippi |
| ADP | New Jersey |
| ADP Micro | Pennsylvania |
| AdPay, Inc. | Colorado |
| Adpearance | Oregon |
| adPharos | |
| AdPipe, Inc. | |
| ADPList | |
| Adplorer Marketing Solutions, LLC | Georgia |
| AdPlugg.com | California |
| AdPro | |
| Adravity | |
| AdRem Software | New York |