| Apro Network Professionals | Tennessee |
| Apros Therapeutics, Inc. | |
| APRSoft Technologies, Inc. | New Jersey |
| Apryse Software, Inc. | |
| APS | Arizona |
| APS Materials, Inc. | Ohio |
| Apsis Labs, LLP | |
| Apsona | California |
| APstem Therapeutics | |
| Apsurge, Inc. | |
| Apt .Red | Colorado |
| APT Media, Inc. | Texas |
| AptaCloud | |
| Aptagen, LLC | Pennsylvania |
| Aptah Bio, Inc. | |
| AptaMatrix, Inc. | New York |
| Aptana | California |
| Aptar Digital Health | |
| Aptatek Biosciences | New Jersey |
| Aptean | Georgia |
| ApTeC Electronics | California |
| Aptech Computer Systems, Inc. | Pennsylvania |
| Aptech Systems, Inc. | |
| Aptek Computers | Texas |
| Aptera Motors Corporation | California |
| Aptera, Inc. | Indiana |
| Aptevo Therapeutics | |
| Aptia | Texas |
| Aptia Systems | Texas |
| Aptify | Florida |
| Aptima, Inc. | Massachusetts |
| Aptitude | |
| Aptitude 8 | |
| Aptitude Internet Solutions | Missouri |
| Aptitude Medical Systems | California |
| Aptium Technologies, LLC | |
| Apton Biosystems | California |
| Aptora Corporation | Kansas |
| Aptos Labs | |
| Aptos, Inc. | Georgia |
| Aptose Biosciences, Inc. | California |
| Aptron | New Jersey |
| Aptus Biosciences, LLC | |
| AptusCare, LLC | Texas |
| AptusSoft | Massachusetts |
| Apty | Texas |
| Apuzzo Internet Marketing | Florida |
| APX Net, Inc. | Maine |
| APX Technologies, Inc. | New York |
| Apyx Medical Corporation | Florida |