| Abracon | Texas |
| Abraham Baldwin Agricultural College | Georgia |
| Abram Scientific, Inc. | California |
| Abrams Capital, LLC | |
| Abrams Media | New York |
| Abraxas Energy Consulting, LLC | California |
| Abraxis Networks | Georgia |
| AbraxSys Corporation | Pennsylvania |
| AbriaCloud Technologies | Georgia |
| Abridge Al, Inc. | Pennsylvania |
| Abrigo | Texas |
| Abroham Neal Software | Virginia |
| ABRT VC | |
| Abruptive, LLC | |
| ABRY Partners, LLC | Massachusetts |
| ABS Business Systems | Alabama |
| ABS Capital Partners | Maryland |
| ABS Group | Texas |
| ABS Marketing, LLC | |
| ABS Ventures | Massachusetts |
| Absci Corporation | Washington |
| Absco Therapeutics, Inc. | |
| Absen, Inc. | |
| AbsenceSoft | Colorado |
| Absentys | Tennessee |
| Absio Corporation | Colorado |
| Absolics, Inc. | Georgia |
| Absolut-e Data Com, Inc. | |
| Absolute Automation, Inc. | Michigan |
| Absolute Communication Solutions | California |
| Absolute Computer Solutions | Missouri |
| Absolute Computers | North Carolina |
| Absolute Electronics | Wisconsin |
| Absolute Integrity Industries, Inc. | Colorado |
| Absolute Logic, Inc. | Louisiana |
| Absolute Performance, Inc. | Colorado |
| Absolute Process Instruments, Inc. | Illinois |
| Absolute Quality Mfg., Inc. | Minnesota |
| Absolute Technology Solutions, LLC | |
| Absolute Technoloy, Inc. | Pennsylvania |
| Absolute Value, LLC | Georgia |
| Absolute Web Services, Inc. | Florida |
| AbsoluteValue Systems, Inc. | Florida |
| AbsoluteView Software | Delaware |
| Abstra | Ohio |
| Abstra | |
| Abstract API, Inc. | California |
| Abstract Edge Web Solutions, LLC | New York |
| Abstract Forward Consulting, LLC | Minnesota |
| Abstract Security, Inc. | |