| OAP3 | Octopus Apollo Vct PLC | 45.80 | 45.80 | 45.70 | 25 | 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 | 0.1400 | 0.1100 | 0.1300 | 35.88M | 0.0000 | | 0.00 | |
| OBI | Ondine Biomedical Inc | 14.00 | 13.70 | 13.71 | 1.09M | -0.04 | | 0.28 | |
| OCDO | Ocado Group Plc | 170.9 | 155.1 | 165.2 | 11.71M | 6.0 | | 3.77 | |
| OCI | Oakley Capital Investments Limited | 510.0 | 504.0 | 504.0 | 314.6K | -6.0 | | 1.18 | |
| OCTF | First Trust Global Funds Icav | 2,153 | 2,152 | 2,171 | 300 | 2 | | 0.09 | |
| 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 | OGDC | 8.050 | 8.050 | 8.050 | 0 | 0.000 | | 0.00 | |
| OGG9 | Gold Bullion Securities | 319.3 | 318.5 | 319.2 | 390 | -3.3 | | 1.02 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 112.3 | 112.3 | 112.3 | 5.5K | 0.2 | | 0.22 | |
| OGN | Origin Enterprises Plc | 360.0 | 356.0 | 360.0 | 2.1K | 4.0 | | 1.12 | |
| OGOL | Global X Metal Securities | 56.35 | 56.35 | 56.35 | 20 | 0.00 | | 0.00 | |
| OGZU | Wisdomtree Metal Securities Limited | 334.2 | 332.0 | 333.9 | 100 | 0.3 | | 0.09 | |
| OHGR | One Health Group Plc | 251.0 | 250.8 | 250.8 | 11.2K | 2.3 | | 0.94 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 102.5 | 102.5 | 102.5 | 0 | 0.0 | | 0.00 | |
| OIG | Oryx International Growth Fund Ltd | 1,295 | 1,235 | 1,260 | 23.8K | -8 | | 0.59 | |
| OIGB | Vaneck Oil Services Ucits ETF | 23.10 | 22.82 | 22.92 | 2.3K | -0.12 | | 0.52 | |
| OIH | Orascom Investment Holding S.A.E | 0.0150 | 0.0140 | 0.0140 | 1.8K | 0.0000 | | 0.00 | |
| OIHV | Vaneck Oil Services Ucits ETF | 31.48 | 30.68 | 30.83 | 6.9K | -0.24 | | 0.77 | |
| OIL | Onyx Etc Securities Public Limited | 168.5 | 168.5 | 184.1 | 2 | 2.1 | | 1.27 | |
| OIL2 | Wisdomtree WTI Crude Oil 2X Daily Lev | 1,447 | 1,365 | 1,434 | 942 | 60 | | 4.33 | |
| OIL3 | UBS AG | 112.2 | 109.7 | 131.2 | 128 | 1.2 | | 1.04 | |
| OILG | UBS AG UBS ETC (CMCI WTI) GBP | 11,295 | 10,673 | 10,673 | 0 | 148 | | 1.40 | |
| OILU | UBS AG | 164.9 | 164.9 | 175.2 | 79 | 1.2 | | 0.74 | |
| OIP9 | Shell International Finance B.V | 97.63 | 97.63 | 97.63 | 0 | 0.00 | | 0.00 | |
| OIT | Odyssean Investment Trust Plc | 220.0 | 217.0 | 219.0 | 286.3K | -1.0 | | 0.45 | |
| OKL3 | Leverage Shares Public Limited Company | 1.179 | 1.086 | 1.103 | 14.8K | -0.139 | | 11.19 | |
| OM9S | Yorkshire Water Finance PLC | 78.72 | 78.72 | 78.72 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics Plc | 39.70 | 37.70 | 39.00 | 2.01M | 1.00 | | 2.63 | |
| OMI | Orosur Mining Inc | 16.00 | 15.00 | 15.60 | 1.46M | -0.15 | | 0.95 | |
| OMIP | One Media Ip Group Plc | 4.250 | 4.151 | 4.151 | 50.0K | -0.099 | | 2.33 | |
| OMU | Old Mutual Limited | 61.00 | 59.00 | 60.80 | 196.6K | 0.20 | | 0.33 | |
| OMXS | Ishares Omx Stockholm Capped Ucits ETF | 817.0 | 809.5 | 813.8 | 460.3K | -1.5 | | 0.18 | |
| ONDO | Ondo Insurtech Plc | 8.500 | 8.000 | 8.000 | 2.47M | -0.200 | | 2.44 | |
| ONT | Oxford Nanopore Technologies Plc | 116.1 | 110.1 | 112.3 | 935.8K | -3.6 | | 3.11 | |
| ONWD | Onward Opportunities Limited | 125.8 | 124.8 | 125.8 | 13.3K | 0.3 | | 0.21 | |
| OOA | Octopus Aim Vct PLC | 38.40 | 38.40 | 39.80 | 436 | 0.00 | | 0.00 | |
| OPEN | Ish Re Incl / Diversity ETF | 11.81 | 11.73 | 11.79 | 9.6K | -0.10 | | 0.83 | |
| OPT | Optima Health Plc | 197.0 | 193.0 | 195.0 | 2.31M | 1.0 | | 0.52 | |
| OPTI | Optibiotix Health Plc | 5.850 | 5.500 | 5.588 | 84.8K | -0.262 | | 4.48 | |
| OQ12 | Standard Chartered PLC | 91.85 | 91.85 | 91.85 | 0 | 0.00 | | 0.00 | |
| ORC1 | Orchard Bond Finance PLC | 99.75 | 99.75 | 96.75 | 0 | 0.00 | | 0.00 | |
| ORC3 | Leverage Shares Public Limited Company | 3.221 | 2.810 | 3.173 | 51.1K | -0.141 | | 4.25 | |
| ORCA | Orcadian Energy Plc | 19.48 | 16.89 | 19.00 | 2.2M | 6.25 | | 49.02 | |
| ORCH | Orchard Funding Group Plc | 63.00 | 62.88 | 62.88 | 30.5K | 0.88 | | 1.42 | |
| ORCP | Oracle Power Plc | 0.0450 | 0.0390 | 0.0420 | 123.0M | -0.0010 | | 2.33 | |
| ORCY | Oracle (ORCL) Options ETP | 5.850 | 5.850 | 5.850 | 100 | -0.165 | | 2.74 | |
| ORIT | Octopus Renewables Infrastructure Trust | 64.50 | 61.80 | 62.30 | 954.4K | 0.30 | | 0.48 | |
| ORNT | Orient Telecoms | 5.000 | 4.000 | 4.000 | 0 | 0.000 | | 0.00 | |
| ORR | Oriole Resources Plc | 0.3700 | 0.3400 | 0.3700 | 34.84M | 0.0300 | | 8.82 | |
| OS73 | Toyota Finance Australia Limited | 95.17 | 95.17 | 95.17 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group Plc | 554.5 | 543.0 | 554.5 | 313.9K | 1.5 | | 0.27 | |
| OSEC | Octopus Aim Vct 2 PLC | 30.30 | 30.30 | 30.00 | 265.7K | 0.00 | | 0.00 | |
| OSX5 | Source Markets Public Limited Company | 60.30 | 60.19 | 60.30 | 0 | -0.07 | | 0.12 | |
| OT06 | Derwent London PLC | 72.10 | 72.10 | 72.10 | 9.6K | 0.00 | | 0.00 | |
| OT1 | Oxford Technology 2 Venture Capital | 19.50 | 18.00 | 19.50 | 0 | 0.00 | | 0.00 | |
| OT3 | Oxford Technology 2 Venture Capital | 10.000 | 8.000 | 10.000 | 0 | 0.000 | | 0.00 | |
| OT4 | Oxford Technology 2 Venture Capital | 8.500 | 6.000 | 8.500 | 5.0K | 0.000 | | 0.00 | |
| OTB | On The Beach Group Plc | 179.8 | 173.0 | 179.4 | 481.2K | 1.0 | | 0.56 | |
| OTES | Hellenic Telecommunications Organization | 11.50 | 11.50 | 11.50 | 100 | 0.29 | | 2.59 | |
| OTPD | OTP Bank Plc | 17.00 | 17.00 | 17.00 | 0 | 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 | 19.00 | 18.00 | 18.00 | 1.0K | -1.00 | | 5.26 | |
| OVZA | Wisdomtree Metal Securities Limited | 127.1 | 124.8 | 126.7 | 534 | -4.0 | | 3.08 | |
| OVZB | Wisdomtree Metal Securities Limited | 100.79 | 97.74 | 99.22 | 486 | -2.99 | | 2.93 | |
| OVZC | Wisdomtree Metal Securities Limited | 44.51 | 43.80 | 44.51 | 6.7K | -4.63 | | 9.42 | |
| OXA1 | Physical Gold Euro Hdg Etc | 225.2 | 224.9 | 225.2 | 103 | -0.5 | | 0.22 | |
| OXA2 | Physical Silver Euro Hdg Etc | 285.3 | 285.3 | 285.3 | 100 | -3.0 | | 1.03 | |
| OXA5 | Db Etc PLC | 340.0 | 340.0 | 340.0 | 15 | -5.6 | | 1.63 | |
| OXA6 | Db Etc PLC | 483.4 | 483.4 | 483.4 | 340 | 5.7 | | 1.19 | |
| OXB | Oxford Biomedica Plc | 649.0 | 620.0 | 646.0 | 275.0K | -3.0 | | 0.46 | |
| OXH | Oxford Technology 2 Venture Capital | 5.500 | 5.500 | 8.500 | 2.0K | 0.000 | | 0.00 | |
| OXIG | Oxford Instruments Plc | 2,896 | 2,804 | 2,832 | 89.9K | -60 | | 2.07 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |