| AbCellera Biologics, Inc. | |
| Abcentra | California |
| Abcepta, Inc. | California |
| ABclonal, Inc. | Massachusetts |
| ABCloudz, Inc. | |
| ABCO Technology | California |
| ABCoA, Inc. | Florida |
| ABCOM Computer & Audio Visual Rentals | Illinois |
| Abcon Therapeutics | |
| Abcore, Inc. | California |
| Abcosat | Michigan |
| Abcuro | Massachusetts |
| Abdera Therapeutics | |
| Abe Camacho | |
| ABEC, Inc. | |
| ABeep, LLC | Illinois |
| Abel Police | |
| Abel Solutions | Georgia |
| Abelian | |
| AbelZeta, Inc. | Maryland |
| Aben, Inc. | Texas |
| Abeo Management Corporation | Texas |
| Abeomics, Inc. | California |
| Abeona Therapeutics, Inc. | Ohio |
| Aberdare Ventures | California |
| Aberdean Consulting, LLC | Wisconsin |
| Aberdeen Strategy & Research | Massachusetts |
| Aberjona Laboratories, Inc. | Massachusetts |
| ABET | |
| AbeTech | Minnesota |
| AbHelix, LLC | |
| ABI | California |
| Abierto Networks, Inc. | Maine |
| Abila, Inc. | Texas |
| Abilene Christian University | Texas |
| Abilene Computer Service | Texas |
| Abilita Bio, Inc. | California |
| Abilita Therapeutics, Inc. | |
| Ability Business Computing Ltd | Ohio |
| Ability Multimedia | Washington |
| Ability Technologies | Colorado |
| Abine, Inc. | |
| aBioBot, Inc. | Ohio |
| Abiocode | California |
| Abiologics | |
| Abiomed | Massachusetts |
| Abiosciences | California |
| ABIS Consulting Group | Texas |
| ABIS, Inc. | Texas |
| AbiTeq, LLC | Oregon |