| OML | Omni-Lite Industries Canada Inc | 3.100 | 2.800 | 2.810 | 37.8K | -0.110 | | 3.77 | |
| OMM | Omineca Mining and Metals Ltd | 0.0500 | 0.0500 | 0.0500 | 25.8K | -0.0050 | | 9.09 | |
| ORC.B | Orca Energy Group Inc Cl B | 2.910 | 2.830 | 2.900 | 14.5K | 0.050 | | 1.75 | |
| OTC | Ocumetics Technology Corp | 0.4700 | 0.4050 | 0.4200 | 32.8K | -0.0100 | | 2.33 | |