| ActiveNature.com | New York |
| ActivEngage, Inc. | Florida |
| Activepieces, Inc. | |
| ActiveProspect | Texas |
| ActiveWebHost.com | Kentucky |
| ActiveWire, Inc. | California |
| ActiveWizards | |
| Activision | California |
| Activision Blizzard | California |
| Activity Software, LLC | Texas |
| ActivMed Practices & Research, LLC | Massachusetts |
| Activtrak | Texas |
| Activu Corporation | New Jersey |
| ActMobile Networks, Inc. | Nevada |
| ActNow Domains | California |
| ACTON | Nevada |
| ACTON International Ltd | Nebraska |
| Acton School of Business | Texas |
| Actridge, LLC | Oklahoma |
| Actsinfo USA, LLC | Arizona |
| Actsoft | Florida |
| Actual Metrics | Arizona |
| Actual SEO Media, Inc. | |
| Actual Software, Inc. | Minnesota |
| Actualize Therapy | |
| ActualMeds | |
| Actuate | New York |
| Actuate Media | |
| Actuate Therapeutics, Inc. | |
| Actuated Medical, Inc. | Pennsylvania |
| Acture Solutions | |
| Actus Digital | Massachusetts |
| ACTWD | |
| Actylis | New York |
| Actym Therapeutics, Inc. | |
| ACU Web, Inc. | California |
| AcuamarkDx | New York |
| Acuative | New Jersey |
| Acudata, Inc. | Texas |
| Acuere Software, LLC | Texas |
| Acuicy, Inc. | |
| Acuitive Solutions, LLC | North Carolina |
| Acuitive Technologies, Inc. | New Jersey |
| Acuity Brands, Inc. | |
| Acuity Codes | |
| Acuity Human Resources, LLC | Pennsylvania |
| Acuity Innovation, LLC | California |
| Acuity Market Intelligence, LLC | Colorado |
| Acuity Pro, Inc. | Oklahoma |
| Acuity Process Solutions | |