| AAE | AAER Inc | TSX Venture | Delisted |
| AAH | Aastra Technologies | TSX | Active |
| AME | Abacus Mining & Exploration Corporation | TSX Venture | Active |
| ABA | Abbastar Resources Corp | TSX Venture | Active |
| ABI | Abcourt Mines Inc. | TSX Venture | Active |
| ABU | Abenteuer Resources Corp. | TSX Venture | Active |
| FAP | Aberdeen Asia-Pacifc | TSX | Active |
| AAB | Aberdeen Intl. J | TSX | Active |
| AAB.WT | Aberdeen Intl. Wt J | TSX | Active |
| ABL | Abington Resources Ltd | TSX Venture | Active |
| ABE | Abitex Resouces Inc. | TSX Venture | Active |
| ABB | Abitibi Mining Corp. | TSX Venture | Active |
| ABD.H | Abode Mortgage Holdings Corp. | TSX Venture | Suspended |
| ABD | Abode Mortgage Holdings Corp. | TSX Venture | Delisted |
| ABT | Absolute Software J | TSX | Active |
| ADA | Acadian Mng Corp. J | TSX | Active |
| ADN | Acadian Timber Corp. | TSX | Active |
| AXE | Acceleware Corp | TSX Venture | Active |
| AXP | Accelrate Power Systems Inc | TSX Venture | Active |
| ADP.P | Accend Capital Corporation | TSX Venture | Suspended |
| AOE | Access International Education Ltd. | TSX Venture | Active |
| ACD | Accord Financial | TSX | Active |
| ACE.B | ACE Aviation Hldg V | TSX | Active |
| ACE.A | ACE Aviation Hldg VV | TSX | Active |
| ACY.P | Acme Resources Corp | TSX Venture | Active |
| ARI | Acme Resources Inc | TSX Venture | Active |
| AKV | Acrex Ventures Ltd. | TSX Venture | Active |
| ART | Acro Energy Technologies Corp | TSX Venture | Active |
| AKM | ACT360 Solutions Ltd. | TSX Venture | Active |
| AEC.H | Action Energy Inc. | TSX Venture | Suspended |
| ACT | Active Control Technology Inc | TSX Venture | Active |
| ACK.P | Active Growth Capital Inc | TSX Venture | Suspended |
| AEU.UN | ACTIVEnergy Incm Un | TSX | Active |
| AAC | Actus Minerals Corp | TSX Venture | Active |
| AFU.UN | Acuity Focus Totl Un | TSX | Active |
| AIG.UN | Acuity Growth Tr Un | TSX | Active |
| ASF | Acuity Small Cap A | TSX | Active |
| ADU | Adamus Resources Limited | TSX Venture | Active |
| AUA | Adanac Molybdenum J | TSX | Active |
| ACR.P | Adcore Capital Inc | TSX Venture | Delisted |
| ATQ | Adeptron Tech Corp J | TSX | Active |
| ADE | Adex Mining Inc | TSX Venture | Active |
| DRX | ADF Group Inc. SV | TSX | Active |
| AHX | Adherex Technology J | TSX | Active |
| ADB | Admiral Bay Resources Inc. | TSX Venture | Active |