| OC | Olive Resource Capital Inc | 0.1200 | 0.1150 | 0.1200 | 1.0K | 0.0050 | | 4.35 | |
| OML | Omni-Lite Industries Canada Inc | 3.030 | 2.810 | 3.030 | 11.4K | 0.220 | | 7.83 | |
| ORC.B | Orca Energy Group Inc Cl B | 2.950 | 2.890 | 2.890 | 16.8K | -0.010 | | 0.34 | |
| OTC | Ocumetics Technology Corp | 0.4300 | 0.4100 | 0.4100 | 5.6K | -0.0100 | | 2.38 | |