| Company | Location |
|---|---|
| Aberdeen Group | Boston, Massachusetts, United States |
| Abgenix Inc. | Fremont, California, United States |
| ABI Research | Oyster Bay, New York, United States |
| Abingworth Management Ltd. | London, United Kingdom |
| Abitec Co. | Cleveland, Ohio, United States |
| ABP International | New York, New York, United States |
| Absara Micro Systems (S) Pte. Ltd. | Singapore, Singapore |
| Absolute Promotions Inc. | Albany, New York, United States |
| Abtech Scientific Inc. | Richmond, Virginia, United States |
| Acacia Research Corporation | Newport Beach, California, United States |
