| OAL | Oriental Aromatics Limited | 432.6 | 400.0 | 429.0 | 565.3K | 27.7 | | 6.90 | |
| OBCL | Orissa Bengal Carrier Limited | 58.00 | 55.70 | 56.16 | 4.0K | -1.52 | | 2.64 | |
| OBEROIRLTY | Oberoi Realty Limited | 1,875 | 1,845 | 1,873 | 270.3K | 3 | | 0.16 | |
| OBEROIRLTY.BL | OBEROI REALTY LTD | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OCCLLTD | OCCL Limited | 162.0 | 158.1 | 160.2 | 25.6K | -0.9 | | 0.57 | |
| ODIGMA | ODIGMA CONSULTANCY SOLUTIONS LTD | 23.49 | 22.15 | 22.73 | 11.1K | 0.20 | | 0.89 | |
| ODYCORP | ODYCORP | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OFSS | Oracle Financial Services | 11,916 | 11,720 | 11,855 | 186.5K | 55 | | 0.47 | |
| OIL | Oil India Limited | 473.0 | 465.1 | 469.9 | 1.45M | 0.7 | | 0.15 | |
| OILCOUNTUB | Oil Country Tubular Limited | 60.30 | 58.80 | 59.79 | 24.5K | 0.10 | | 0.17 | |
| OILCOUNTUB.BL | OILCOUNTUB.BL | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OILIETF | OILIETF | 11.37 | 11.25 | 11.26 | 1.0M | -0.06 | | 0.53 | |
| OLAELEC | Ola Electric Mobility Ltd | 38.14 | 37.30 | 37.63 | 17.73M | -0.37 | | 0.97 | |
| OLECTRA | Olectra Greentech Limited | 1,339 | 1,317 | 1,326 | 216.0K | 0 | | 0.01 | |
| OMAXAUTO | Omax Autos Limited | 193.5 | 183.2 | 191.2 | 38.4K | 4.4 | | 2.35 | |
| OMAXE | Omaxe Limited | 115.0 | 107.2 | 113.4 | 4.98M | 4.0 | | 3.67 | |
| OMFREIGHT | Om Freight Forwarders Limited | 92.92 | 90.01 | 90.27 | 8.4K | -0.19 | | 0.21 | |
| OMFURN-SM | OMFURN-SM | 59.45 | 59.20 | 59.45 | 42.0K | -0.05 | | 0.08 | |
| OMINFRAL | OM INFRA LIMITED | 84.00 | 81.50 | 83.30 | 48.8K | 1.20 | | 1.46 | |
| OMKARCHEM | Omkar Speciality Chemicals Limited | 3.410 | 3.410 | 3.410 | 0 | 0.000 | | 0.00 | |
| OMNI | Omnitech Engineering Limited | 587.0 | 572.4 | 575.7 | 237.8K | 0.0 | | NaN | |
| OMPOWER | Om Power Transmission Limited | 173.0 | 170.0 | 172.3 | 84.4K | 0.0 | | NaN | |
| ONEGLOBAL | ONEGLOBAL | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ONELIFECAP | Onelife Capital Advisors Limited | 32.00 | 30.07 | 31.79 | 17.4K | 0.29 | | 0.92 | |
| ONEPOINT | One Point One Solutions Limited | 55.70 | 54.75 | 55.54 | 750.1K | 0.03 | | 0.05 | |
| ONESOURCE | ONESOURCE SPECIALTY PHARMA LTD | 1,551 | 1,491 | 1,518 | 315.1K | 34 | | 2.28 | |
| ONGC | Oil & Natural Gas Corporation Limited | 234.4 | 231.1 | 232.0 | 11.21M | -0.2 | | 0.09 | |
| ONGC.BL | ONGC.BL | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ONIDA | Onida Electronics Limited | 37.58 | 36.00 | 36.24 | 366.2K | 0.00 | | NaN | |
| ONIXSOLAR | Onix Solar Energy Ltd. | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ONMOBILE | OnMobile Global Limited | 52.59 | 52.59 | 52.59 | 14.3K | -1.07 | | 1.99 | |
| ONWARDTEC | Onward Technologies Limited | 294.4 | 283.1 | 285.6 | 39.9K | 2.2 | | 0.78 | |
| ONYX-SM | ONYX-SM | 42.05 | 42.05 | 42.05 | 8.0K | 0.00 | | 0.00 | |
| OPTIEMUS | Optiemus Infracom Limited | 587.4 | 574.4 | 576.5 | 121.1K | -8.0 | | 1.37 | |
| 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 | 242.0 | 237.0 | 239.1 | 1.4K | 2.1 | | 0.88 | |
| ORCHASP | Orchasp Limited | 1.470 | 1.390 | 1.430 | 239.5K | 0.040 | | 2.88 | |
| ORCHPHARMA | Orchid Pharma Limited | 984.0 | 923.7 | 928.8 | 177.8K | -44.6 | | 4.58 | |
| ORIANA | ORIANA | 1,353 | 1,285 | 1,302 | 32.1K | -21 | | 1.59 | |
| ORIANA-SM | ORIANA POWER LTD | 1,353 | 1,285 | 1,302 | 32.1K | -21 | | 1.59 | |
| ORICONENT | Oricon Enterprises Limited | 56.98 | 55.01 | 55.40 | 23.2K | -1.25 | | 2.21 | |
| ORIENTALTL | Oriental Trimex Limited | 5.300 | 5.010 | 5.140 | 54.6K | 0.010 | | 0.19 | |
| ORIENTBELL | Orient Bell Limited | 382.1 | 371.1 | 377.2 | 37.2K | -1.0 | | 0.26 | |
| ORIENTCEM | Orient Cement Limited | 134.9 | 131.0 | 131.4 | 105.9K | -3.1 | | 2.28 | |
| ORIENTCER | Orient Ceratech Limited | 47.14 | 44.81 | 45.29 | 150.3K | 0.00 | | 0.00 | |
| ORIENTELEC | Orient Electric Limited | 187.0 | 177.1 | 179.5 | 229.2K | -6.5 | | 3.47 | |
| ORIENTHOT | Oriental Hotels Limited | 141.0 | 138.5 | 139.2 | 831.9K | -1.8 | | 1.25 | |
| ORIENTLTD | Orient Press Limited | 85.49 | 83.03 | 83.03 | 4.1K | -1.16 | | 1.38 | |
| ORIENTPPR | Orient Paper & Industries Limited | 17.28 | 16.92 | 17.04 | 119.3K | 0.01 | | 0.06 | |
| ORIENTTECH | Orient Technologies Limited | 248.3 | 242.9 | 243.7 | 59.0K | -1.9 | | 0.77 | |
| ORIRAIL | Oriental Rail Infrastructure Ltd. | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| ORISSAMINE | The Orissa Minerals Development | 4,626 | 4,515 | 4,544 | 7.0K | -29 | | 0.63 | |
| ORKLAINDIA | Orkla India Ltd | 609.9 | 576.0 | 606.0 | 407.3K | 26.2 | | 4.52 | |
| ORTEL | Ortel Communications Limited | 2.120 | 2.000 | 2.000 | 5.2K | -0.100 | | 4.76 | |
| ORTINGLOBE | Ortin Global Limited | 15.74 | 14.72 | 15.10 | 4.2K | -0.25 | | 1.63 | |
| OSELDEVICE.ST | OSEL DEVICES LIMITED | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OSIAHYPER | Osia Hyper Retail Limited | 2.810 | 2.570 | 2.610 | 611.2K | -0.090 | | 3.33 | |
| OSWALAGRO | Oswal Agro Mills Limited | 37.80 | 36.61 | 36.86 | 14.2K | 0.07 | | 0.19 | |
| OSWALGREEN | Oswal Greentech Limited | 21.18 | 20.73 | 20.90 | 102.8K | 0.11 | | 0.53 | |
| OSWALPUMPS | Oswal Pumps Limited | 301.0 | 295.4 | 298.4 | 235.1K | 3.1 | | 1.03 | |
| OSWALSEEDS | ShreeOswal Seeds And Chemicals Limited | 12.50 | 11.97 | 12.17 | 50.8K | -0.20 | | 1.62 | |
| OWAIS | Owais Metal and Mineral Processing Ltd | 74.25 | 72.20 | 74.25 | 98.5K | 3.50 | | 4.95 | |