| OAL | Oriental Aromatics Limited | 539.0 | 522.2 | 533.7 | 28.2K | 1.4 | | 0.25 | |
| OBCL | Orissa Bengal Carrier Limited | 59.42 | 57.01 | 57.60 | 365 | -1.82 | | 3.06 | |
| OBEROIRLTY | Oberoi Realty Limited | 1,883 | 1,838 | 1,859 | 638.2K | 21 | | 1.14 | |
| OBEROIRLTY.BL | OBEROI REALTY LTD | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OCCLLTD | OCCL Limited | 167.7 | 156.4 | 167.7 | 156.2K | 8.0 | | 5.00 | |
| ODIGMA | ODIGMA CONSULTANCY SOLUTIONS LTD | 21.24 | 20.65 | 21.00 | 12.0K | 0.04 | | 0.19 | |
| ODYCORP | ODYCORP | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OFSS | Oracle Financial Services | 10,805 | 10,332 | 10,770 | 545.3K | -155 | | 1.42 | |
| OIL | Oil India Limited | 476.7 | 470.7 | 475.2 | 667.0K | -3.9 | | 0.80 | |
| OILCOUNTUB | Oil Country Tubular Limited | 72.20 | 70.89 | 72.20 | 26.6K | 1.31 | | 1.85 | |
| OILCOUNTUB.BL | OILCOUNTUB.BL | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OILIETF | OILIETF | 11.29 | 10.98 | 11.01 | 645.5K | -0.01 | | 0.09 | |
| OLAELEC | Ola Electric Mobility Ltd | 42.50 | 38.01 | 38.48 | 194.45M | -4.04 | | 9.50 | |
| OLECTRA | Olectra Greentech Limited | 1,247 | 1,204 | 1,207 | 357.2K | -37 | | 2.96 | |
| OMAXAUTO | Omax Autos Limited | 204.9 | 198.2 | 200.2 | 52.0K | -1.4 | | 0.68 | |
| OMAXE | Omaxe Limited | 122.7 | 116.0 | 118.5 | 822.6K | 0.9 | | 0.73 | |
| OMFREIGHT | Om Freight Forwarders Limited | 94.25 | 89.10 | 90.65 | 3.2K | -1.18 | | 1.28 | |
| OMFURN-SM | OMFURN-SM | 53.00 | 52.95 | 52.95 | 2.4K | -1.00 | | 1.85 | |
| OMINFRAL | OM INFRA LIMITED | 79.40 | 77.77 | 79.03 | 35.3K | 0.58 | | 0.74 | |
| OMNI | Omnitech Engineering Limited | 551.7 | 530.1 | 534.0 | 316.3K | -13.9 | | 2.54 | |
| OMPOWER | Om Power Transmission Limited | 173.0 | 162.5 | 168.8 | 81.3K | 2.8 | | 1.69 | |
| ONEGLOBAL | ONEGLOBAL | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ONELIFECAP | Onelife Capital Advisors Limited | 37.25 | 35.23 | 36.05 | 125.3K | 0.24 | | 0.67 | |
| ONEPOINT | One Point One Solutions Limited | 72.00 | 68.63 | 69.60 | 5.64M | 0.29 | | 0.42 | |
| ONESOURCE | ONESOURCE SPECIALTY PHARMA LTD | 1,634 | 1,567 | 1,603 | 227.4K | 8 | | 0.50 | |
| ONGC | Oil & Natural Gas Corporation Limited | 238.0 | 234.7 | 235.9 | 5.05M | -3.1 | | 1.31 | |
| ONGC.BL | ONGC.BL | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ONIDA | Onida Electronics Limited | 33.99 | 33.22 | 33.68 | 303.4K | 0.40 | | 1.20 | |
| ONIXSOLAR | Onix Solar Energy Ltd. | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ONMOBILE | OnMobile Global Limited | 53.29 | 51.50 | 52.81 | 26.1K | 0.39 | | 0.74 | |
| ONWARDTEC | Onward Technologies Limited | 291.0 | 285.1 | 287.7 | 7.2K | 0.4 | | 0.14 | |
| ONYX-SM | ONYX-SM | 36.00 | 36.00 | 36.00 | 4.0K | -0.10 | | 0.28 | |
| OPTIEMUS | Optiemus Infracom Limited | 787.3 | 746.1 | 758.6 | 487.2K | -23.0 | | 2.94 | |
| OPTIFIN | OPTIFIN | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OPTIMYSTIX.SM | Optimystix Entertainment India Limited | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ORBTEXP | Orbit Exports Limited | 227.1 | 226.0 | 226.9 | 3.6K | -0.1 | | 0.04 | |
| ORCHASP | Orchasp Limited | 1.390 | 1.360 | 1.380 | 56.2K | 0.030 | | 2.22 | |
| ORCHPHARMA | Orchid Pharma Limited | 1,116 | 1,059 | 1,065 | 63.6K | -31 | | 2.85 | |
| ORIANA | ORIANA | 343.5 | 305.1 | 330.8 | 1.27M | 27.1 | | 8.91 | |
| ORIANA-SM | ORIANA POWER LTD | 343.5 | 305.1 | 330.8 | 1.27M | 27.1 | | 8.91 | |
| ORICONENT | Oricon Enterprises Limited | 52.99 | 51.02 | 51.40 | 12.7K | -0.37 | | 0.71 | |
| ORIENTALTL | Oriental Trimex Limited | 5.140 | 4.920 | 4.990 | 34.1K | 0.030 | | 0.60 | |
| ORIENTBELL | Orient Bell Limited | 412.0 | 387.0 | 407.6 | 29.2K | 16.5 | | 4.22 | |
| ORIENTCEM | Orient Cement Limited | 123.3 | 121.2 | 122.2 | 491.1K | -0.2 | | 0.13 | |
| ORIENTCER | Orient Ceratech Limited | 48.19 | 47.01 | 47.80 | 31.2K | 0.97 | | 2.07 | |
| ORIENTELEC | Orient Electric Limited | 165.0 | 161.2 | 162.3 | 123.3K | -1.7 | | 1.05 | |
| ORIENTHOT | Oriental Hotels Limited | 141.5 | 139.3 | 140.9 | 382.0K | 0.5 | | 0.37 | |
| ORIENTLTD | Orient Press Limited | 80.88 | 76.50 | 80.48 | 555 | 0.98 | | 1.23 | |
| ORIENTPPR | Orient Paper & Industries Limited | 17.00 | 16.57 | 16.76 | 183.8K | -0.04 | | 0.24 | |
| ORIENTTECH | Orient Technologies Limited | 238.8 | 233.0 | 237.3 | 143.5K | 2.1 | | 0.89 | |
| ORIRAIL | Oriental Rail Infrastructure Ltd. | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ORISSAMINE | The Orissa Minerals Development | 3,745 | 3,675 | 3,735 | 4.0K | 18 | | 0.48 | |
| ORKLAINDIA | Orkla India Ltd | 558.5 | 538.0 | 556.0 | 98.4K | 10.0 | | 1.83 | |
| ORTEL | Ortel Communications Limited | 1.740 | 1.700 | 1.740 | 2.8K | -0.020 | | 1.14 | |
| ORTINGLOBE | Ortin Global Limited | 15.24 | 14.50 | 15.23 | 3.0K | 0.48 | | 3.25 | |
| OSELDEVICE.ST | OSEL DEVICES LIMITED | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OSIAHYPER | Osia Hyper Retail Limited | 2.230 | 2.110 | 2.190 | 358.1K | -0.020 | | 0.90 | |
| OSWALAGRO | Oswal Agro Mills Limited | 34.79 | 33.34 | 34.00 | 19.4K | 0.12 | | 0.35 | |
| OSWALGREEN | Oswal Greentech Limited | 20.10 | 19.70 | 19.99 | 54.1K | 0.09 | | 0.45 | |
| OSWALPUMPS | Oswal Pumps Limited | 280.7 | 273.5 | 275.0 | 310.5K | -5.3 | | 1.89 | |
| OSWALSEEDS | ShreeOswal Seeds And Chemicals Limited | 13.24 | 12.70 | 13.08 | 69.3K | 0.40 | | 3.15 | |
| OWAIS | Owais Metal and Mineral Processing Ltd | 74.50 | 72.65 | 72.65 | 1.8K | -1.45 | | 1.96 | |