| Array Systems, Inc. | California |
| Array Technologies, Inc. | New Mexico |
| Array, Inc. | Texas |
| Arraya Solutions | Pennsylvania |
| ArrayComm | North Dakota |
| ArrayFire | Georgia |
| Arrayit Corporation | California |
| Arraystar | Maryland |
| Arraystar | |
| Arrayworks | Massachusetts |
| ARRC Technology | California |
| ArrePath | New Jersey |
| Arrick Robotics | Texas |
| Arrikto, Inc. | California |
| Arrington Research, Inc. | Arizona |
| ARRIS Composites, Inc. | |
| Arris Consulting, LLC | |
| Arriv | Oklahoma |
| Arrive Health | |
| Arrive Logistics | Texas |
| Arrived Holdings, Inc. | |
| ArriVent Biopharma | |
| Arrivia | |
| Arrivo BioVentures | North Carolina |
| Arrow AI | California |
| Arrow Antenna, LLC | Wyoming |
| Arrow Electronics, Inc. | Colorado |
| Arrow Labs | New York |
| Arrow Tech Associates, Inc. | Vermont |
| ArrowChat | Nevada |
| Arroweye Solutions, Inc. | |
| Arrowhead Consulting | |
| Arrowhead Pharmaceuticals, Inc. | |
| Arrowlytics | North Carolina |
| Arrowpoint Corporation | Virginia |
| Arrowstreet Capital, L.P. | |
| Arroyo Webworks | New Mexico |
| Ars Datum | California |
| Ars Nova Interactive, Inc. | Indiana |
| Ars Nova Software, LLC | Washington |
| ARS Pharmaceuticals Operations, Inc. | |
| Ars Technica | Virginia |
| ARS Technologies, Inc. | California |
| ARScience Biotherapeutics | |
| Arsenal Biosciences | California |
| Arsenal Biosciences, Inc. | California |
| Arsenal Capital Partners | |
| Arsenal Computing | |
| Arsenal Consulting, Inc. | Massachusetts |
| Arsenal Growth | Florida |