| AbboMax, Inc. | California |
| Abbott | |
| Abbott Analytics | California |
| Abbott Capital Mangement, LLC | New York |
| Abbott Jewelry Systems, LLC | Connecticut |
| Abbott Laboratories Employees Credit Union | |
| Abbottics AI, LLC | Alabama |
| Abbsent Solutions | |
| AbbVie, Inc. | Illinois |
| AbbVie, Inc. | Illinois |
| Abby Connect | Nevada |
| AbbyBank | |
| ABBYY | California |
| ABC Computer Plus, LLC | Arizona |
| ABC Conferencing | Ohio |
| ABC Virtual Communications | Iowa |
| ABC Web Service | Florida |
| ABC-MultiSites | Delaware |
| ABCD Computers | Nevada |
| Abcentra | California |
| Abcepta, Inc. | California |
| ABclonal, Inc. | Massachusetts |
| ABCO Technology | California |
| ABCoA, Inc. | Florida |
| ABCOM Computer & Audio Visual Rentals | Illinois |
| Abcore, Inc. | California |
| Abcosat | Michigan |
| Abcuro | Massachusetts |
| ABD Federal Credit Union | |
| ABEC, Inc. | |
| ABeep, LLC | Illinois |
| Abel Police | |
| Abel Solutions | Georgia |
| Abelia Corporation | Virginia |
| AbelZeta, Inc. | Maryland |
| Aben, Inc. | |
| 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 |
| ABI | California |
| Abierto Networks, Inc. | Maine |
| Abila, Inc. | Texas |
| Abilene Christian University | Texas |
| Abilene Computer Service | Texas |