| Aestas Pharma, Inc. | |
| Aesthetech | |
| Aesthetic | California |
| Aesthetics Digital | |
| Aestiva Software | California |
| AETEA | Maryland |
| aeTechnology | |
| Aeterna Zentaris, Inc. | South Carolina |
| Aether | California |
| Aethercomm | California |
| Aetherflux | |
| Aethl Bio, Inc. | |
| Aethlon Medical, Inc. | California |
| Aethon Therapeurics, Inc. | |
| Aethon, Inc. | Pennsylvania |
| Aetion, Inc. | New York |
| Aetomic Marketing | Ohio |
| Aetos Systems, Inc. | Alabama |
| AetoTech, LLC | Nevada |
| Aetsoft, Inc. | Wyoming |
| Aeva, Inc. | California |
| Aevum, Inc. | |
| AEX Communications, Inc. | Minnesota |
| AEYE Health | |
| AEye, Inc. | California |
| Aezion, Inc. | Texas |
| AF Ventures | New York |
| AFAIK, Inc. | |
| AFAR Communications, Inc. | California |
| AfaSci, Inc. | California |
| Afaxys, Inc. | |
| 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 Analytics Pvt Ltd | Washington |
| Affineon Health, Inc. | |
| Affinergy, LLC | |
| Affini-T Therapeutics, Inc. | |
| Affinia Therapeutics | |
| AffiniPay, LLC | Texas |
| Affinitech, Inc. | Minnesota |
| Affinitel Communications | California |
| Affinity Biosensors | California |
| Affinity Computer Technologies | Virginia |
| Affinity Enterprises, LLC | New York |
| Affinity Express, Inc. | Illinois |