| OAP3 | Octopus Apollo Vct PLC | 44.80 | 44.20 | 45.70 | 9.9K | 0.00 | | 0.00 | |
| OAUE | UBS Etf (Ch) - Gold (Usd) A-Dis | 125.6 | 125.6 | 125.6 | 34 | 0.0 | | 0.00 | |
| OBD | Oxford Biodynamics PLC | 0.1300 | 0.1100 | 0.1200 | 7.18M | 0.0000 | | 0.00 | |
| OBI | Ondine Biomedical Inc. | 12.30 | 11.50 | 11.50 | 2.48M | -0.50 | | 4.17 | |
| OCDO | Ocado Group PLC | 232.4 | 205.2 | 205.4 | 5.08M | -23.0 | | 10.07 | |
| OCI | Oakley Capital Investments Limited | 548.0 | 530.0 | 530.0 | 309.2K | 0.0 | | 0.00 | |
| OCTF | First Trust Global Funds Icav | 2,153 | 2,152 | 2,212 | 300 | 7 | | 0.31 | |
| OE08 | Bank Of Montreal | 100.4 | 100.4 | 100.4 | 1.0M | 0.0 | | 0.00 | |
| OE61 | The Kingdom Of Morocco | 104.6 | 104.6 | 104.6 | 0 | 0.0 | | 0.00 | |
| OFG | Octopus Future Generations Vct PLC | 77.00 | 77.00 | 77.00 | 0 | 0.00 | | 0.00 | |
| OGDC | Oil And Gas Development Company Limited | 8.050 | 8.050 | 8.050 | 1.3K | 0.000 | | 0.00 | |
| OGG9 | Gold Bullion Securities LD | 360.5 | 358.1 | 358.1 | 0 | 11.3 | | 3.26 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 121.4 | 119.8 | 121.4 | 4.0K | -0.9 | | 0.71 | |
| OGN | Origin Enterprises PLC | 387.0 | 387.0 | 382.5 | 24 | 0.0 | | 0.00 | |
| OGOL | Global X Metal Securities | 56.35 | 56.35 | 56.35 | 1.5K | -0.35 | | 0.62 | |
| OGZU | Wisdomtree Metal Securities Limited | 360.2 | 355.9 | 360.2 | 1 | -16.9 | | 4.48 | |
| OHGR | One Health Group PLC | 293.7 | 291.3 | 292.5 | 9.3K | 0.0 | | 0.00 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 102.5 | 102.5 | 102.5 | 0 | 0.0 | | 0.00 | |
| OI69 | Natwest Markets PLC | 100.1 | 100.1 | 100.1 | 0 | 0.0 | | 0.00 | |
| OIG | Oryx International Growth Fund LTD | 1,353 | 1,279 | 1,325 | 2.7K | 8 | | 0.57 | |
| OIGB | Vaneck Ucits Etfs PLC | 26.01 | 25.32 | 25.95 | 32.4K | 0.30 | | 1.16 | |
| OIH | Orascom Investment Holding S.A.E | 0.0150 | 0.0140 | 0.0140 | 1.8K | 0.0000 | | 0.00 | |
| OIHV | Vaneck Ucits Etfs PLC | 35.05 | 34.13 | 35.06 | 15.6K | 0.33 | | 0.97 | |
| OIL | Onyx Etc Securities Public Limited | 199.6 | 199.6 | 220.4 | 2 | 9.9 | | 4.95 | |
| OIL2 | Wisdomtree Commodity Securities Limited | 1,767 | 1,727 | 1,769 | 14.2K | 87 | | 5.68 | |
| OIL3 | UBS AG | 112.2 | 109.7 | 146.2 | 128 | 2.6 | | 1.91 | |
| OILG | UBS AG | 11,295 | 11,295 | 11,328 | 1 | 100 | | 0.92 | |
| OILU | UBS AG | 164.9 | 164.9 | 186.0 | 79 | 1.6 | | 0.89 | |
| OIP9 | Shell International Finance B.V | 97.56 | 97.56 | 97.56 | 0 | 0.00 | | 0.00 | |
| OIT | Odyssean Investment Trust PLC | 232.0 | 230.0 | 230.0 | 131.7K | -6.0 | | 2.54 | |
| OKL3 | Leverage Shares Public Limited Company | 0.7600 | 0.6600 | 0.6640 | 14.4K | -0.0180 | | 2.64 | |
| OM9S | Yorkshire Water Finance PLC | 78.56 | 78.56 | 78.56 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics PLC | 40.00 | 38.30 | 38.80 | 81.5K | -0.90 | | 2.27 | |
| OMI | Orosur Mining INC | 15.50 | 14.50 | 15.20 | 2.07M | -0.05 | | 0.33 | |
| OMIP | One Media Ip Group PLC | 4.500 | 4.500 | 4.650 | 263 | 0.000 | | 0.00 | |
| OMU | Old Mutual Limited | 59.60 | 58.20 | 59.00 | 38.8K | -0.40 | | 0.67 | |
| OMXS | Ishares Iv PLC | 837.8 | 830.0 | 834.9 | 3.5K | -8.3 | | 0.98 | |
| ONDO | Ondo Insurtech PLC | 6.500 | 6.000 | 6.250 | 102.2K | 0.250 | | 4.17 | |
| ONT | Oxford Nanopore Technologies PLC | 173.0 | 157.7 | 170.0 | 1.67M | 10.0 | | 6.25 | |
| ONWD | Onward Opportunities Limited | 151.7 | 148.3 | 151.5 | 55.4K | 2.5 | | 1.68 | |
| OOA | Octopus Aim Vct PLC | 39.00 | 39.00 | 37.60 | 1.3K | 0.00 | | 0.00 | |
| OPEN | Ishares Iv PLC | 12.49 | 12.49 | 12.52 | 424 | 0.01 | | 0.10 | |
| OPT | Optima Health PLC | 245.0 | 243.0 | 244.0 | 361.8K | 0.0 | | 0.00 | |
| OPTI | Optibiotix Health PLC | 6.000 | 5.500 | 5.750 | 427.0K | 0.100 | | 1.77 | |
| OQ12 | Standard Chartered PLC | 91.29 | 91.29 | 91.29 | 0 | 0.00 | | 0.00 | |
| ORC1 | Orchard Bond Finance PLC | 95.86 | 95.86 | 96.85 | 0 | 0.00 | | 0.00 | |
| ORC3 | Leverage Shares Public Limited Company | 4.320 | 3.820 | 4.255 | 2.0K | 0.181 | | 4.44 | |
| ORCA | Orcadian Energy PLC | 19.98 | 17.10 | 18.00 | 521.4K | 0.50 | | 2.86 | |
| ORCH | Orchard Funding Group PLC | 61.00 | 60.05 | 60.50 | 84.5K | 0.00 | | 0.00 | |
| ORCP | Oracle Power PLC | 0.0430 | 0.0400 | 0.0415 | 80.08M | 0.0015 | | 3.75 | |
| ORCY | Leverage Shares Public Limited Company | 5.730 | 5.650 | 5.964 | 53 | 0.095 | | 1.44 | |
| ORIT | Octopus Renewables Infrastructure Trust | 62.60 | 61.80 | 62.00 | 1.02M | 0.20 | | 0.32 | |
| ORNT | Orient Telecoms PLC | 5.000 | 5.000 | 4.500 | 90.0K | 0.000 | | 0.00 | |
| ORR | Oriole Resources PLC | 0.3400 | 0.3100 | 0.3250 | 150.4K | 0.0000 | | 0.00 | |
| OS73 | Toyota Finance Australia Limited | 96.31 | 96.31 | 96.31 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group PLC | 518.5 | 506.5 | 511.5 | 1.44M | -2.5 | | 0.49 | |
| OSEC | Octopus Aim Vct 2 PLC | 29.80 | 29.80 | 30.20 | 83.1K | 0.00 | | 0.00 | |
| OSX5 | Invesco Markets PLC | 61.65 | 61.65 | 61.65 | 0 | -0.43 | | 0.69 | |
| OT06 | Derwent London PLC | 72.10 | 72.10 | 72.10 | 9.6K | 0.00 | | 0.00 | |
| OT1 | Oxford Technology 2 Venture Capital | 17.00 | 17.00 | 19.50 | 3.1K | 0.00 | | 0.00 | |
| OT3 | Oxford Technology 2 Venture Capital | 11.000 | 11.000 | 10.000 | 500 | 0.000 | | 0.00 | |
| OT4 | Oxford Technology 2 Venture Capital | 6.500 | 6.500 | 8.500 | 169 | 0.000 | | 0.00 | |
| OTB | On The Beach Group PLC | 188.2 | 180.1 | 181.2 | 565.2K | -3.0 | | 1.63 | |
| OTES | Hellenic Telecommunications Organization | 11.65 | 11.65 | 11.65 | 0 | 0.30 | | 2.64 | |
| OTPD | Otp Bank PLC | 17.00 | 17.00 | 17.00 | 369 | 0.00 | | 0.00 | |
| OTV2 | Octopus Titan Vct PLC | 10.00 | 10.00 | 17.50 | 37.0K | 0.00 | | 0.00 | |
| OVCT | Oberon Aim Vct PLC | 18.25 | 18.00 | 19.00 | 56.1K | 0.00 | | 0.00 | |
| OVZA | Wisdomtree Metal Securities Limited | 139.3 | 135.0 | 138.5 | 28 | -0.5 | | 0.32 | |
| OVZB | Wisdomtree Metal Securities Limited | 106.2 | 102.2 | 106.2 | 15 | -7.2 | | 6.32 | |
| OVZC | Wisdomtree Metal Securities Limited | 51.32 | 49.96 | 50.98 | 4.9K | -3.39 | | 6.23 | |
| OXA1 | Db Etc PLC | 245.4 | 243.0 | 245.4 | 117 | -0.1 | | 0.02 | |
| OXA2 | Db Etc PLC | 331.6 | 331.6 | 331.6 | 3 | 0.0 | | 0.00 | |
| OXA5 | Db Etc PLC | 360.2 | 360.2 | 360.2 | 110 | -14.8 | | 3.94 | |
| OXA6 | Db Etc PLC | 497.8 | 497.8 | 497.8 | 65 | -28.0 | | 5.33 | |
| OXB | Oxford Biomedica PLC | 455.0 | 424.0 | 424.0 | 2.4M | -23.0 | | 5.15 | |
| OXH | Oxford Technology 2 Venture Capital | 10.000 | 10.000 | 8.500 | 22.3K | 0.000 | | 0.00 | |
| OXIG | Oxford Instruments PLC | 2,732 | 2,672 | 2,690 | 176.6K | -34 | | 1.25 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |