| Acadeum, Inc. | |
| Acadeus | Montana |
| Acadia Creative, LLC | Maine |
| Acadia Pharmaceuticals, Inc. | |
| Acadia Systems, Inc. | Pennsylvania |
| Acadia Technology Group, LLC | New Jersey |
| Acadia Technology, Inc. | California |
| Acadian Ventures Management Co., LLC | |
| Acadiana Computer Systems, Inc | Louisiana |
| Acadiana Marketing Solutions | |
| Acadiana Security Plus | Louisiana |
| Acalvio Technologies, Inc. | |
| Acante, Inc. | |
| Acanthas Pharma Services, Inc. | |
| ACAP, LLC | Florida |
| Acario Innovation | |
| Acarte Technology Services, Inc. | Florida |
| AcaStat Software | Virginia |
| Acato Information Management, LLC | |
| ACB Recovery | Massachusetts |
| ACB Solutions | Alaska |
| ACC Electronix, Inc. | Illinois |
| ACC Technical Services | New York |
| ACC Telecom | Maryland |
| Accanito Capital Group, LLC | Florida |
| Acccor Technologies, LLC | |
| Accedere | Colorado |
| AcceGen | New Jersey |
| Accel | California |
| Accel Computers, Inc. | Minnesota |
| Accel Corporation | |
| Accel Diagnostics | Texas |
| Accel Diagnostics Laboratories | |
| Accel Materials, Inc. | Massachusetts |
| Accel Net, Inc. | Washington |
| Accel-RF | California |
| Accela ChemBio, Inc. | California |
| Accelagen, Inc. | California |
| Accelalpha, Inc. | Georgia |
| Accelario | |
| AccelBio | |
| AccelByte | Washington |
| Acceldata, Inc. | California |
| Accelebrate, Inc. | Georgia |
| Accelecom | Kentucky |
| AcceleDev Chemical, LLC | |
| Acceler8 Talent​ | Massachusetts |
| Accelera IT Solutions | Arizona |
| Accelera Solutions | Virginia |
| Accelerance | California |