| Company | Location |
|---|---|
| Antaria Ltd. | Bentley, Western Australia, Australia |
| Antenna Group | San Francisco, California, United States |
| Anton Paar USA | Ashland, Virginia, United States |
| AorTech | Rogers, Minnesota, United States |
| AP Materials | St. Louis, Michigan, United States |
| Apax Partners Inc. | Menlo Park, California, United States |
| APEX Technologies Inc. | Independence, Kentucky, United States |
| Aphios Corp. | Woburn, Massachusetts, United States |
| ApoLife Inc. | Detroit, Michigan, United States |
| Applied Biosystems | Foster City, California, United States |
