| Stock Name | Symbol |
|---|---|
| OccuLogix, Inc. | |
| OceanaGold Corporation | |
| OFI Income Fund | |
| Oil Sands and Energy Mega-Projects Trust | |
| Oil Sands Sector Fund | |
| Oil Sands Split Trust | |
| Oilexco Incorporated | |
| OilSands Canada Corporation | |
| Olympus Pacific Minerals Inc. | |
| Oncolytics Biotech Inc. | |
| Oncothyreon Inc. | |
| Ondine Biopharma Corporation | |
| Onex Corporation | |
| Ontex Resources Limited | |
| Opawica Explorations Inc. | |
| Open Range Energy Corp. | |
| Open Text Corporation | |
| OpenSky Capital Index Income Fund | |
| OPMEDIC Group Inc. | |
| Opta Minerals Inc. | |
| OPTI Canada Inc. | |
| Orbus Pharma Inc. | |
| Orezone Resources Inc. | |
| Organic Resource Management Inc. | |
| Oriel Resources plc | |
| Orvana Minerals Corp. | |
| OSI Geospatial Inc. | |
| Osisko Exploration Ltée | |
| Otelco Inc. | |