| Abbreviation | Definition |
|---|---|
| AAB | Aberdeen International, Inc. |
| AAH | Aastra Technologies, Limited |
| AAV | Advantage Oil Gas, LTD. |
| AAV | Advantage Oil & Gas, LTD. |
| ABC | Asia Bio-Chem Group Corporation |
| ABH | AbitibiBowater, Inc. (de-listed 2009) |
| ABK.A | Allbanc Split Corporation Class A Capital Shares |
| ABO-A | Arbor Memorial Services, Inc. - Class A |
| ABT | Absolute Software Corporation |
| ACC | Amica Mature Lifestyles, Inc./Style de Vie Amica, Inc. |
| ACD | Accord Financial Corporation |
| ACE | ACE Aviation Holdings, Inc. |
| ACM | Astral Media, Inc. |
| ACO | Atco, LTD. Class I |
| ACQ | AutoCanada, Inc. |
| AD | Alaris Royalty Corporation |
| ADA | Acadian Mining Corporation |
| ADC | Canadian Advantaged Convertibles Fund |
| ADN | Acadian Timber Corporation |
| ADW | Andrew Peller, Limited |