| Company | Location |
|---|---|
| Activest | Munich, Germany |
| Acusphere, Inc. | Tewksbury, Massachusetts, United States |
| Acutronic USA Inc. | Pittsburgh, Pennsylvania, United States |
| Ad-Nano Technologies Private Limited | Shimoga, Karnataka, India |
| Adaptive Materials Inc. | Ann Arbor, Michigan, United States |
| ADCO Circuits | Rochester Hills, Michigan, United States |
| Adelan Co. | Edgbaston, United Kingdom |
| Adept Technology | Livermore, California, United States |
| Admatechs Co. Ltd. | Miyoshi-shi, Aichi, Japan |
| ADMC Inc. | Norwood, Pennsylvania, United States |
