| Company | Location |
|---|---|
| Atlantic International Products & Services Inc. | Rio Rancho, New Mexico, United States |
| Atlas Venture Partners | Waltham, Massachusetts, United States |
| ATMI Inc. | Danbury, Connecticut, United States |
| Atmospheric Process Plasma | Hwaseong-si, Gyeonggi-do, Korea |
| Atom Optoelectronics | Los Angeles, California, United States |
| Atomate Corp. | Santa Barbara, California, United States |
| Atomic Force F&E | Mannheim, Germany |
| Atomic-Scale Design Inc. | Westlake Village, California, United States |
| AtomWorks | Glencoe, Illinois, United States |
| ATOS GmbH | Pfungstadt, Germany |
