| OAP3 | Octopus Apollo Vct PLC | 47.20 | 44.20 | 45.70 | 83 | 0.00 | | 0.00 | |
| OAUE | UBS Etf (Ch) - Gold (Usd) A-Dis | 125.6 | 125.6 | 125.6 | 219 | 0.0 | | 0.00 | |
| OBD | Oxford Biodynamics PLC | 0.1200 | 0.0900 | 0.1050 | 4.84M | 0.0050 | | 5.00 | |
| OBI | Ondine Biomedical Inc. | 14.20 | 13.00 | 13.75 | 478.0K | 0.25 | | 1.85 | |
| OCDO | Ocado Group PLC | 176.5 | 172.3 | 174.4 | 1.52M | -0.8 | | 0.46 | |
| OCI | Oakley Capital Investments Limited | 508.0 | 502.0 | 508.0 | 63.9K | 2.0 | | 0.40 | |
| OCTF | First Trust Global Funds Icav | 2,153 | 2,152 | 2,188 | 300 | 6 | | 0.29 | |
| OE08 | Bank Of Montreal | 100.4 | 100.4 | 100.4 | 1.0M | 0.0 | | 0.00 | |
| OE61 | The Kingdom Of Morocco | 106.7 | 106.7 | 106.7 | 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 | 322.7 | 322.7 | 322.7 | 0 | -6.8 | | 2.05 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 113.7 | 113.7 | 114.3 | 18 | -2.4 | | 2.11 | |
| OGN | Origin Enterprises PLC | 377.8 | 355.0 | 365.0 | 9 | 0.0 | | 0.00 | |
| OGOL | Global X Metal Securities | 56.35 | 56.35 | 56.35 | 50 | 0.00 | | 0.00 | |
| OGZU | Wisdomtree Metal Securities Limited | 338.0 | 337.0 | 337.2 | 2 | -8.0 | | 2.32 | |
| OHGR | One Health Group PLC | 249.9 | 246.5 | 248.5 | 19.1K | 1.0 | | 0.40 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 102.5 | 102.5 | 102.5 | 0 | 0.0 | | 0.00 | |
| OIG | Oryx International Growth Fund LTD | 1,250 | 1,250 | 1,258 | 5.5K | -3 | | 0.20 | |
| OIGB | Vaneck Ucits Etfs PLC | 23.93 | 23.34 | 23.51 | 3.8K | -0.15 | | 0.63 | |
| OIH | Orascom Investment Holding S.A.E | 0.0150 | 0.0140 | 0.0140 | 1.8K | 0.0000 | | 0.00 | |
| OIHV | Vaneck Ucits Etfs PLC | 32.18 | 31.55 | 31.41 | 4.0K | -0.24 | | 0.77 | |
| OIL | Onyx Etc Securities Public Limited | 168.5 | 168.5 | 179.6 | 2 | 3.9 | | 2.38 | |
| OIL2 | Wisdomtree Commodity Securities Limited | 1,420 | 1,348 | 1,344 | 20.1K | 101 | | 8.79 | |
| OIL3 | UBS AG | 112.2 | 109.7 | 126.9 | 128 | 5.1 | | 4.34 | |
| OILG | UBS AG | 11,295 | 11,295 | 10,345 | 1 | 163 | | 1.65 | |
| OILU | UBS AG | 164.9 | 164.9 | 169.8 | 79 | 5.3 | | 3.29 | |
| OIP9 | Shell International Finance B.V | 97.63 | 97.63 | 97.63 | 0 | 0.00 | | 0.00 | |
| OIT | Odyssean Investment Trust PLC | 212.7 | 209.0 | 210.0 | 187.8K | -2.0 | | 0.94 | |
| OKL3 | Leverage Shares Public Limited Company | 1.747 | 1.640 | 1.682 | 17.3K | -0.045 | | 2.61 | |
| OM9S | Yorkshire Water Finance PLC | 78.72 | 78.72 | 78.72 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics PLC | 40.60 | 38.00 | 38.80 | 385.0K | -1.90 | | 4.67 | |
| OMI | Orosur Mining INC | 18.00 | 16.00 | 16.50 | 3.5M | -0.25 | | 1.49 | |
| OMIP | One Media Ip Group PLC | 4.500 | 4.000 | 4.250 | 12.7K | 0.000 | | 0.00 | |
| OMU | Old Mutual Limited | 60.24 | 58.92 | 60.00 | 187.9K | -0.20 | | 0.33 | |
| OMXS | Ishares Iv PLC | 823.8 | 811.8 | 822.3 | 3.1K | 4.0 | | 0.49 | |
| ONDO | Ondo Insurtech PLC | 8.000 | 5.980 | 7.780 | 12.41M | 1.780 | | 29.67 | |
| ONT | Oxford Nanopore Technologies PLC | 119.0 | 110.6 | 116.6 | 1.06M | 0.6 | | 0.52 | |
| ONWD | Onward Opportunities Limited | 124.4 | 122.5 | 124.0 | 31.6K | 0.0 | | 0.00 | |
| OOA | Octopus Aim Vct PLC | 38.40 | 38.40 | 39.80 | 436 | 0.00 | | 0.00 | |
| OPEN | Ishares Iv PLC | 11.95 | 11.79 | 11.96 | 209 | 0.02 | | 0.19 | |
| OPT | Optima Health PLC | 192.0 | 190.0 | 191.5 | 51.3K | 0.5 | | 0.26 | |
| OPTI | Optibiotix Health PLC | 6.500 | 6.300 | 6.400 | 43.2K | 0.000 | | 0.00 | |
| OQ12 | Standard Chartered PLC | 91.85 | 91.85 | 91.85 | 0 | 0.00 | | 0.00 | |
| ORC1 | Orchard Bond Finance PLC | 99.15 | 99.15 | 96.75 | 0 | 0.00 | | 0.00 | |
| ORC3 | Leverage Shares Public Limited Company | 3.882 | 3.365 | 3.569 | 113.2K | -0.660 | | 15.61 | |
| ORCA | Orcadian Energy PLC | 12.50 | 11.63 | 12.00 | 365.5K | -0.25 | | 2.04 | |
| ORCH | Orchard Funding Group PLC | 63.00 | 60.67 | 61.50 | 68.4K | 0.00 | | 0.00 | |
| ORCP | Oracle Power PLC | 0.0455 | 0.0350 | 0.0400 | 363.64M | -0.0030 | | 6.98 | |
| ORCY | Leverage Shares Public Limited Company | 6.195 | 6.195 | 6.123 | 4 | -0.356 | | 5.33 | |
| ORIT | Octopus Renewables Infrastructure Trust | 64.40 | 62.00 | 62.60 | 818.8K | 0.00 | | 0.00 | |
| ORNT | Orient Telecoms PLC | 5.000 | 5.000 | 4.000 | 90.0K | 0.000 | | 0.00 | |
| ORR | Oriole Resources PLC | 0.3700 | 0.3400 | 0.3550 | 5.69M | -0.0050 | | 1.39 | |
| OS73 | Toyota Finance Australia Limited | 95.17 | 95.17 | 95.17 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group PLC | 548.0 | 536.0 | 547.0 | 307.3K | 1.5 | | 0.27 | |
| OSEC | Octopus Aim Vct 2 PLC | 30.30 | 30.30 | 30.00 | 265.7K | 0.00 | | 0.00 | |
| OSX5 | Invesco Markets PLC | 60.53 | 60.53 | 60.53 | 0 | 0.00 | | 0.00 | |
| OT06 | Derwent London PLC | 72.10 | 72.10 | 72.10 | 9.6K | 0.00 | | 0.00 | |
| OT1 | Oxford Technology 2 Venture Capital | 18.00 | 18.00 | 19.50 | 20.0K | 0.00 | | 0.00 | |
| OT3 | Oxford Technology 2 Venture Capital | 8.000 | 8.000 | 10.000 | 35.0K | 0.000 | | 0.00 | |
| OT4 | Oxford Technology 2 Venture Capital | 7.000 | 7.000 | 9.000 | 9.3K | 0.000 | | 0.00 | |
| OTB | On The Beach Group PLC | 173.0 | 165.2 | 170.0 | 730.6K | -1.6 | | 0.93 | |
| OTES | Hellenic Telecommunications Organization | 11.30 | 11.30 | 11.30 | 0 | -0.19 | | 1.65 | |
| OTPD | Otp Bank PLC | 17.00 | 17.00 | 17.00 | 369 | 0.00 | | 0.00 | |
| OTV2 | Octopus Titan Vct PLC | 19.00 | 16.00 | 17.50 | 2.6K | 0.00 | | 0.00 | |
| OVCT | Oberon Aim Vct PLC | 18.00 | 18.00 | 19.00 | 1.0K | 0.00 | | 0.00 | |
| OVZA | Wisdomtree Metal Securities Limited | 131.3 | 127.3 | 131.3 | 15 | 1.8 | | 1.36 | |
| OVZB | Wisdomtree Metal Securities Limited | 105.3 | 99.9 | 105.2 | 45 | 5.1 | | 5.06 | |
| OVZC | Wisdomtree Metal Securities Limited | 47.46 | 46.16 | 47.06 | 4.1K | -0.94 | | 1.96 | |
| OXA1 | Db Etc PLC | 229.5 | 225.8 | 225.8 | 482 | -2.6 | | 1.12 | |
| OXA2 | Db Etc PLC | 297.3 | 297.3 | 297.3 | 150 | 1.2 | | 0.41 | |
| OXA5 | Db Etc PLC | 337.5 | 337.5 | 344.2 | 15 | 1.3 | | 0.37 | |
| OXA6 | Db Etc PLC | 483.4 | 483.4 | 483.4 | 340 | 2.1 | | 0.44 | |
| OXB | Oxford Biomedica PLC | 655.0 | 634.0 | 649.0 | 693.8K | -5.0 | | 0.76 | |
| OXH | Oxford Technology 2 Venture Capital | 5.500 | 5.500 | 8.500 | 2.0K | 0.000 | | 0.00 | |
| OXIG | Oxford Instruments PLC | 2,938 | 2,838 | 2,872 | 300.4K | -34 | | 1.17 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |