| Abbreviation | Definition |
|---|---|
| ARR | Aurora Inv.tst. |
| ART | Artisan (Uk) |
| ARTA | Artilium |
| ASBE | Association of British Engineering |
| ASC | Asos |
| ASCD | Asia Cement Corporation Global Depository Shares |
| ASCH | Aberdeen Smaller Companies High Income Trust, P.L.C. Ordinary shares |
| ASD | Axis-shield |
| ASH | Ashley House |
| ASHM | Ashmore |
| ASKD | Asustek Gdr Rgs |
| ASKG | Asustek Gdr 4A |
| ASL | Aberforth Smaller Companies Trust, P.L.C. |
| ASM | Antisoma |
| ASPL | Aseana Prop. |
| AST | Ascent Resources, P.L.C. |
| ASTO | Assetco |
| ASTR | Astaire Group |
| ASTR | Astaire Grp |
| ASW | Advanced Computer Software Group |