| Aavatar Consulting | Pennsylvania |
| Aavenir | Texas |
| Aavia | New York |
| Aavis Pharmaceuticals, Inc. | Georgia |
| AAVnerGene, Inc. | Maryland |
| Aavocyte, Inc. | |
| AAVogen, Inc. | |
| AAXA Technologies, Inc. | California |
| AB Biosciences | Massachusetts |
| AB Computer | California |
| AB Controls, Inc. | California |
| Ab Initio Software, LLC | Massachusetts |
| AB Interfaces | Virginia |
| AB Sims, LLC | Washington |
| AB Soft | California |
| AB Strategic | Indiana |
| AB Studio | California |
| AB&T | |
| ABA Moriah | Virginia |
| Abaco Systems, Inc. | Alabama |
| Abacode, Inc. | Florida |
| Abacum, Inc. | New York |
| Abacus 21 | New York |
| Abacus Bioscience | |
| Abacus Consulting, LLC | New Jersey |
| Abacus Federal Savings Bank | |
| Abacus Group, LLC | New York |
| Abacus Information Systems, Inc. | New York |
| Abacus Insights | Massachusetts |
| Abacus Labs, Inc. | New York |
| Abacus Software Systems | Massachusetts |
| Abacus Solutions, LLC | Georgia |
| Abacus Technical Services | |
| Abacus Technologies | Alabama |
| Abacus Technology | Maryland |
| Abacus Web Services | Florida |
| Abacus.AI | California |
| AbacusNext | California |
| Abalone Bio, Inc. | California |
| Abamis IT Solutions | Florida |
| Abaqus, Inc. | California |
| ABARIS Investment Management | |
| Abata Therapeutics | Massachusetts |
| Abate Solutions, LLC | Florida |
| Abaxent, LLC | Wisconsin |
| Abbasoft Technologies | California |
| Abbey Labs, Inc. | California |
| Abbi Media | |
| Abbiotec, Inc. | California |
| Abbkine, Inc. | Georgia |