| OCBC 5xLongSG250226 | OCBC 5xLongSG250226 | - | 1.63 | 1.62 - 1.63 | 1.62 | +0.004 | 0.25% | 500 |
| OCBC 5xLongSG251023 | OCBC 5xLongSG251023 | - | 3.61 | 0.00 - 0.00 | 3.61 | 0.00 | 0.00% | 0 |
| OCBC 5xShortSG250226 | OCBC 5xShortSG250226 | - | 0.075 | 0.075 - 0.076 | 0.075 | +0.001 | 1.35% | 30,300 |
| OCBC Bank | OVERSEA-CHINESE BANKING CORP | - | 16.50 | 16.20 - 16.50 | 16.46 | +0.03 | 0.18% | 4,295,757 |
| OCBC Bk MB eCW250328 | OCBC Bk MB eCW250328 | - | 0.08 | 0.08 - 0.08 | 0.08 | -0.002 | 2.44% | 300 |
| OCBC Bk MB eCW250627 | OCBC Bk MB eCW250627 | - | 0.045 | 0.044 - 0.045 | 0.044 | 0.00 | 0.00% | 400,000 |
| OCBC Bk MB ePW241202 | OCBC Bk MB ePW241202 | - | 0.005 | 0.00 - 0.00 | 0.005 | 0.00 | 0.00% | 0 |
| OCBC Bk MB ePW250307 | OCBC Bk MB ePW250307 | - | 0.012 | 0.00 - 0.00 | 0.012 | 0.00 | 0.00% | 0 |
| OCBC Bk MB ePW250627 | OCBC Bk MB ePW250627 | - | 0.038 | 0.038 - 0.039 | 0.039 | 0.00 | 0.00% | 312,500 |
| Ocean Sky Intl | OCEAN SKY INTERNATIONAL LTD | - | 0.028 | 0.026 - 0.029 | 0.026 | 0.00 | 0.00% | 10,200 |
| Oceanus | OCEANUS GROUP LIMITED | - | 0.006 | 0.006 - 0.007 | 0.007 | 0.00 | 0.00% | 6,099,500 |
| Oiltek | Oiltek | - | 1.04 | 0.835 - 1.04 | 0.85 | -0.19 | 18.27% | 833,200 |
| OIO | DLF HOLDINGS LIMITED | - | 0.06 | 0.00 - 0.00 | 0.06 | 0.00 | 0.00% | 0 |
| OKH Global | OKH GLOBAL LTD. | - | 0.012 | 0.012 - 0.012 | 0.012 | 0.00 | 0.00% | 50,000 |
| OKP | OKP HOLDINGS LIMITED | - | 0.32 | 0.32 - 0.32 | 0.32 | -0.005 | 1.54% | 44,000 |
| Olam Group | Olam Group | - | 1.18 | 1.17 - 1.19 | 1.17 | -0.02 | 1.68% | 857,800 |
| Old Chang Kee | OLD CHANG KEE LTD. | - | 0.785 | 0.00 - 0.00 | 0.785 | 0.00 | 0.00% | 0 |
| Olive Tree | OLIVE TREE ESTATES LIMITED | - | 0.081 | 0.00 - 0.00 | 0.081 | 0.00 | 0.00% | 0 |
| OneApex | CHEW'S GROUP LIMITED | - | 0.13 | 0.00 - 0.00 | 0.13 | 0.00 | 0.00% | 0 |
| Ossia Intl | OSSIA INTERNATIONAL LTD | - | 0.145 | 0.00 - 0.00 | 0.145 | 0.00 | 0.00% | 0 |
| OTS Holdings | OTS Holdings | - | 0.147 | 0.00 - 0.00 | 0.147 | 0.00 | 0.00% | 0 |
| OUE | OUE LIMITED | - | 1.02 | 1.02 - 1.03 | 1.03 | 0.00 | 0.00% | 70,600 |
| OUE Healthcare | OUE LIPPO HEALTHCARE LTD | - | 0.027 | 0.027 - 0.027 | 0.027 | -0.001 | 3.57% | 970,300 |
| OUEREIT | OUE COMMERCIAL REIT | - | 0.28 | 0.28 - 0.29 | 0.285 | +0.005 | 1.79% | 2,335,000 |
| Ouhua Energy | OUHUA ENERGY HOLDINGS LIMITED | - | 0.089 | 0.089 - 0.093 | 0.092 | +0.002 | 2.22% | 126,800 |
| Overseas Edu | OVERSEAS EDUCATION LIMITED | - | 0.20 | 0.20 - 0.20 | 0.20 | +0.001 | 0.50% | 200,000 |
| Oxley | OXLEY HOLDINGS LIMITED | - | 0.075 | 0.075 - 0.077 | 0.077 | +0.002 | 2.67% | 800 |
| OxPay Financial | ARTIVISION TECHNOLOGIES LTD | - | 0.032 | 0.032 - 0.037 | 0.037 | 0.00 | 0.00% | 73,000 |
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