| Abacus 21 | New York |
| Abacus Bioscience | |
| Abacus Consulting, LLC | New Jersey |
| Abacus Group, LLC | New York |
| Abacus Information Systems, Inc. | New York |
| Abacus Insights | Massachusetts |
| Abacus Labs, Inc. | New York |
| Abacus Semiconductor | |
| 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 | |
| Abask Marketing | |
| Abata Therapeutics | |
| Abate Solutions, LLC | Florida |
| Abaxent, LLC | Wisconsin |
| Abbasoft Technologies | California |
| AbBC Therapies | |
| Abbey Labs, Inc. | California |
| Abbi Media | |
| Abbiotec, Inc. | California |
| Abbkine, Inc. | Georgia |
| AbboMax, Inc. | California |
| Abbott | |
| Abbott Analytics | California |
| Abbott Capital Mangement, LLC | New York |
| Abbott Jewelry Systems, LLC | Connecticut |
| Abbott Technologies | Wyoming |
| Abbottics AI, LLC | Alabama |
| Abbratech, Inc. | |
| Abbsent Solutions | |
| AbbVie, Inc. | Illinois |
| Abby Connect | Nevada |
| ABBYY | California |
| ABC Computer Plus, LLC | Arizona |
| ABC Conferencing | Ohio |
| ABC Digital | |
| ABC Software | Florida |
| ABC Virtual Communications | Iowa |
| ABC Web Service | Florida |
| ABC-MultiSites | Delaware |
| ABCD Computers | Nevada |