| Arcesium, LLC | New York |
| Arcfield | Virginia |
| ArcGIS Developer | California |
| Arch Aerial, LLC | Texas |
| Arch Grants | Missouri |
| Arch Memory | Missouri |
| Arch Tech, LLC | Georgia |
| Arch Technology Solutions, LLC | Oklahoma |
| Arch Therapeutics, Inc. | |
| ARCH Venture Partners | Illinois |
| Archaeo Agency, LLC | |
| ArchaeoSoft, Inc. | |
| Archer Advertising | |
| Archer Healthcare | |
| Archer Pharmaceuticals, Inc. | |
| Archer Solutions, Inc. | Texas |
| Archer Technologies, LLC | Kansas |
| Archera | Washington |
| ArcherPoint | Georgia |
| Arches Solutions, LLC | |
| Archetype | New York |
| Archetype AI | |
| Archibus | Massachusetts |
| ARCHIBUS Solution Centers | North Carolina |
| Archieboy Holdings, LLC | Massachusetts |
| Archiform Ltd | Florida |
| Archill | |
| Archimedes Strategic Branding | |
| Archimedic, Inc. | |
| Archion Technologies | California |
| Archipelo | |
| ArchiTech Software & Web Solutions, Inc. | Florida |
| Architected Relations, Inc. | |
| Architecture Technology Corporation | Minnesota |
| Architext, Inc. | Texas |
| Archive Data Solutions | Pennsylvania |
| Archive Intelligence, Inc. | |
| Archive Resale | |
| ArchLynk | California |
| Archmore Business Web | |
| Archon Biosciences, Inc. | |
| Archos | Colorado |
| Archrival | Nebraska |
| Archrock, Inc. | California |
| Archtech Electronics Corporation | New Jersey |
| Archway Group | |
| Archway Systems, Inc. | California |
| Archy | |
| Arciem, LLC | California |
| Arcjet Labs, Inc. | |