| Abbreviation | Definition |
|---|---|
| ADMS | Advance Developing Markets Fund LTD. (de-listed) |
| ADN | Aberdeen Asset Management, P.L.C. |
| ADNW | Aberdeen Asset Management, P.L.C. Warrants |
| ADPH | A&D Pharma Holdings, N.V. |
| ADS | Alexander David Securities Group, P.L.C. |
| ADT | Adept Telecom |
| ADT | Adept Telecom, P.L.C. Ordinary shares |
| ADU | Advance UK Trust, P.L.C. |
| ADX | Average Directional Index |
| AEC | Aec Educ. |
| AEC | AEC Educational (de-listed) |
| AEC | AEC Educational (de-listed) |
| AEG | Active Energy |
| AEG | Active Energy Group P.L.C. Ordinary shares |
| AEN | Andes Energia |
| AEP | Anglo-Eastern Plantations |
| AERL | Aer Lingus |
| AERL | Aer Lingus (de-listed) |
| AEV1 | Acuity Environmental (de-listed) |
| AEV1 | Acuity Environmental (de-listed) |