| Abbreviation | Definition |
|---|---|
| AJB | Appalachian Power Company Class B |
| AJC | Appalachian Power Company Class C |
| AJG | Arthur J. Gallagher & Company |
| AJL | Amway Japan, LTD. |
| AK | Ackerley Group, Inc. |
| AKB | Ambac Financial Group, Inc. |
| AKK | Armstrong World Industries, Inc. |
| AKOA | Embotelladora Andina S. A. de C. Class A |
| AKOB | Embotelladora Andina S. A. de C. Class B |
| AKR | Acadia Realty Trust |
| AKS | AK Steel Holding Corporation |
| AKSP | A K Steel Holding Corporation Preferred |
| AL | Alcan Aluminum, LTD. |
| ALA | Alcatel Alsthom, Inc. |
| ALB | Albemarle Corporation |
| ALC | AllTrista Corporation |
| ALD | Allied Capital Corporation |
| ALG | Alamo Group, Inc. |
| ALJ | Alon USA Energy, Inc. |
| ALK | Alaska Air Group, Inc. |