| Code | Name | High | Low | Close | Volume | Change | |
| OBV | Oyster Bay Marlborough Vineyards | 1.450 | 1.450 | 1.450 | 0 | 0.000 |  | 0.00 | 5 |
| OCFHA | OCF 00.00% Perpetual Preference Shares | 71.70 | 71.70 | 71.70 | 8,000 | 0.20 |  | 0.28 | 5 |
| OGC | OceanaGold Corporation Ordinary Shares | 3.700 | 3.550 | 3.550 | 95,325 | 0.050 |  | 1.39 | 6 |
| OIC | Opus International Consultants | 1.790 | 1.770 | 1.790 | 10,000 | 0.020 |  | 1.13 | 5 |
| OMG | Orion Minerals Group | 0.0200 | 0.0200 | 0.0200 | 0 | 0.0000 |  | 0.00 | 4 |
| OZY | Tortis-Ozzy Fund Units | 3.370 | 3.370 | 3.370 | 4,193 | 0.010 |  | 0.30 | 5 |