| OC | Olive Resource Capital Inc | 0.1050 | 0.1050 | 0.1050 | 224.5K | -0.0050 | | 4.55 | |
| OCO.WT | OROCO RESOURCES CORP WT EX 12SE | 0.0900 | 0.0750 | 0.0750 | 43.5K | -0.0150 | | 16.67 | |
| ORC.B | Orca Energy Group Inc Cl B | 0.8000 | 0.6300 | 0.8000 | 41.9K | -0.0500 | | 5.88 | |
| ORCL | Oracle Commodity Holding Corp | 0.0250 | 0.0200 | 0.0200 | 272.7K | -0.0050 | | 20.00 | |
| OTC | Ocumetics Technology Corp | 0.4000 | 0.3900 | 0.3900 | 8.0K | -0.0100 | | 2.50 | |