| AesculaTech | California |
| AESG, Inc. | Virginia |
| aeSolutions | South Carolina |
| Aestas Pharma, Inc. | North Carolina |
| Aesthetic | California |
| Aestiva Software | California |
| AETEA | Maryland |
| Aeterna Zentaris, Inc. | South Carolina |
| Aether | California |
| Aethercomm | California |
| Aethlon Medical, Inc. | California |
| Aethon Therapeutics, Inc. | New York |
| Aethon, Inc. | Pennsylvania |
| Aetion, Inc. | New York |
| Aetomic Marketing | Ohio |
| Aetos Systems, Inc. | Alabama |
| AetoTech, LLC | Nevada |
| Aetsoft, Inc. | Wyoming |
| AEX Communications, Inc. | Minnesota |
| AEye, Inc. | California |
| Aezion, Inc. | Texas |
| AF Ventures | New York |
| AFAIK, Inc. | |
| AFAR Communications, Inc. | California |
| AfaSci, Inc. | California |
| Afaxys Pharma, LLC | South Carolina |
| AFC Cable Systems, Inc. | Massachusetts |
| AFCOM | Illinois |
| Afero | California |
| Affable Technologies, Inc. | Texas |
| Affective, Inc. | Massachusetts |
| Affiliated Technology Solutions | New Jersey |
| Affiliated, Inc. | Ohio |
| Affine | Washington |
| Affini-T Therapeutics | Massachusetts |
| Affinia Therapeutics | Massachusetts |
| AffiniPay, LLC | Texas |
| Affinitech, Inc. | Minnesota |
| Affinitel Communications | California |
| Affinity | California |
| Affinity Bank | |
| Affinity Biosensors | California |
| Affinity Computer Technologies | Virginia |
| Affinity Enterprises, LLC | New York |
| Affinity Express, Inc. | Illinois |
| Affinity for Design | Arizona |
| Affinity Global, Inc. | Florida |
| Affinity Life Sciences, Inc. | New Hampshire |
| Affinity Molecules, LLC | |
| Affinity Technology | Arizona |