| Company | Location |
|---|---|
| Advion BioSciences Inc. | Ithaca, New York, United States |
| AEgis Technologies Group Inc. | Huntsville, Alabama, United States |
| Aeonian Bricks | Summerville, South Carolina, United States |
| Aerodyne Research Inc. | Billerica, Massachusetts, United States |
| Aerogen | Mountain View, California, United States |
| Aerotech Inc. | Pittsburgh, Pennsylvania, United States |
| Affymetrix Inc. | Santa Clara, California, United States |
| African Pegmatite | Meyerton, Gauteng, South Africa |
| AGEF EV - Institut an der Heinrich-Heine-Universitaet | Duesseldorf, Germany |
| Agere Systems Inc. | Allentown, Pennsylvania, United States |
