| OAP3 | Octopus Apollo Vct Plc | 46.10 | 46.10 | 46.10 | 159 | 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 | 0.1050 | 0.1000 | 0.1030 | 27.13M | 0.0000 | | 0.00 | |
| OBI | Ondine Biomedical Inc | 10.000 | 9.210 | 9.400 | 577.1K | 0.100 | | 1.08 | |
| OCDO | Ocado Group Plc | 335.0 | 316.2 | 322.2 | 1.75M | -13.2 | | 3.94 | |
| OCI | Oakley Capital Investments Limited | 549.4 | 540.0 | 544.0 | 105.8K | 0.0 | | 0.00 | |
| OCTF | First Trust Global Funds Icav | 2,257 | 2,257 | 2,257 | 0 | -9 | | 0.39 | |
| OE08 | Bank Of Montreal | 100.4 | 100.4 | 100.4 | 1.0M | 0.0 | | 0.00 | |
| OE61 | The Kingdom Of Morocco | 102.7 | 102.7 | 102.7 | 0 | 0.0 | | 0.00 | |
| OFG | Octopus Future Generations Vct Plc | 80.50 | 80.50 | 80.50 | 0 | 0.00 | | 0.00 | |
| OGDC | Oil and Gas Development Company Limited | 8.050 | 8.050 | 8.050 | 0 | 0.000 | | 0.00 | |
| OGG9 | Gold Bullion Securities | 334.8 | 318.6 | 334.8 | 1.9K | 4.9 | | 1.47 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 114.1 | 114.1 | 114.1 | 37.6K | -5.2 | | 4.40 | |
| OGN | Origin Enterprises Plc | 349.8 | 340.0 | 340.0 | 713 | 0.0 | | 0.00 | |
| OGOL | Global X Metal Securities | 51.35 | 51.35 | 51.35 | 100 | 0.68 | | 1.34 | |
| OGZU | Wisdomtree Physical Swiss Gold | 340.7 | 332.7 | 340.7 | 100 | -13.8 | | 3.88 | |
| OHGR | One Health Group Plc | 310.4 | 297.5 | 302.5 | 36.7K | -7.0 | | 2.26 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 99.28 | 99.28 | 99.28 | 0 | 0.00 | | 0.00 | |
| OI69 | Natwest Markets PLC | 99.99 | 99.99 | 99.99 | 0 | 0.00 | | 0.00 | |
| OIG | Oryx International Growth Fund Ltd | 1,390 | 1,325 | 1,340 | 2.5K | -18 | | 1.29 | |
| OIGB | Vaneck Oil Services Ucits ETF | 23.85 | 23.28 | 23.52 | 3.0K | -1.08 | | 4.37 | |
| 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 | 31.97 | 31.55 | 31.55 | 23.1K | -1.33 | | 4.03 | |
| OIL | Onyx Spot Return Crude Oil | 288.5 | 288.5 | 288.5 | 0 | -14.2 | | 4.68 | |
| OIL1 | Onyx Etc Securities Public Limited | 224.4 | 215.0 | 215.0 | 100 | -10.6 | | 4.70 | |
| OIL2 | Wisdomtree WTI Crude Oil 2X Daily Lev | 2,355 | 2,185 | 2,230 | 8.8K | -37 | | 1.64 | |
| OIL3 | UBS Etc [Cmci WTI 3M] USD | 169.4 | 169.4 | 169.4 | 0 | -13.5 | | 7.39 | |
| OILG | UBS Etc [Cmci Wti] GBP | 12,885 | 12,885 | 12,885 | 0 | -80 | | 0.62 | |
| OILP | GraniteShares 4X Long Crude Oil Etp | 2,243 | 1,997 | 1,997 | 1.5K | -210 | | 9.50 | |
| OILU | UBS Etc [Ubs BBG CMCI WTI Crude Idx] USD | 211.5 | 211.5 | 211.5 | 0 | -12.7 | | 5.64 | |
| OIP9 | Shell International Finance B.V | 97.00 | 97.00 | 97.00 | 0 | 0.00 | | 0.00 | |
| OIT | Odyssean Investment Trust Plc | 243.0 | 240.0 | 241.0 | 231.6K | 0.0 | | 0.00 | |
| OKL3 | Ls 3X Long Oklo Etp | 0.1160 | 0.1090 | 0.1090 | 75.7K | -0.0400 | | 26.85 | |
| OKP | Okopa Plc | 1.850 | 1.750 | 1.850 | 2.2K | 0.000 | | 0.00 | |
| OM9S | Yorkshire Water Finance PLC | 78.56 | 78.56 | 78.56 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics Plc | 38.00 | 36.20 | 38.00 | 420.8K | 1.30 | | 3.54 | |
| OMI | Orosur Mining Inc | 12.35 | 11.32 | 11.50 | 5.98M | -0.78 | | 6.35 | |
| OMIP | One Media Ip Group Plc | 4.700 | 4.450 | 4.450 | 2.1K | 0.000 | | 0.00 | |
| OMU | Old Mutual Limited | 65.20 | 63.43 | 64.00 | 78.0K | 0.00 | | 0.00 | |
| OMXS | Ishares Omx Stockholm Capped Ucits ETF | 842.5 | 828.8 | 833.5 | 14.7K | -4.0 | | 0.48 | |
| ONDO | Ondo Insurtech Plc | 7.500 | 7.200 | 7.450 | 1.57M | 0.350 | | 4.93 | |
| ONT | Oxford Nanopore Technologies Plc | 218.8 | 205.2 | 215.8 | 1.28M | 2.8 | | 1.31 | |
| ONWD | Onward Opportunities Limited | 172.0 | 171.0 | 172.0 | 29.4K | 0.0 | | 0.00 | |
| OOA | Octopus Aim Vct Plc | 39.00 | 38.00 | 38.00 | 1.3K | 0.00 | | 0.00 | |
| OPEN | Ish Incl / Diversity ETF | 12.16 | 12.10 | 12.16 | 2.4K | -0.09 | | 0.73 | |
| OPT | Optima Health Plc | 247.5 | 244.0 | 245.0 | 51.7K | -1.0 | | 0.41 | |
| OPTI | Optibiotix Health Plc | 5.900 | 5.500 | 5.600 | 70.1K | -0.200 | | 3.45 | |
| OQ12 | Standard Chartered PLC | 88.94 | 88.94 | 88.94 | 0 | 0.00 | | 0.00 | |
| ORC1 | Orchard Bond Finance PLC | 99.24 | 99.24 | 96.73 | 0 | 0.00 | | 0.00 | |
| ORC3 | Ls 3X Long Oracle [Orcl] Etp | 2.190 | 1.783 | 2.177 | 280.1K | 0.059 | | 2.79 | |
| ORCA | Orcadian Energy Plc | 14.50 | 14.00 | 14.50 | 2.5K | 0.00 | | 0.00 | |
| ORCH | Orchard Funding Group Plc | 69.50 | 69.17 | 69.50 | 700 | 0.00 | | 0.00 | |
| ORCP | Oracle Power Plc | 0.0450 | 0.0390 | 0.0410 | 55.77M | -0.0020 | | 4.65 | |
| ORCY | Leverage Shares Public Limited Company | 4.545 | 4.250 | 4.545 | 3.8K | 0.077 | | 1.72 | |
| ORIT | Octopus Renewables Infrastructure Trust | 61.00 | 60.30 | 60.90 | 572.9K | 0.10 | | 0.16 | |
| ORNT | Orient Telecoms Plc | 4.500 | 4.500 | 4.500 | 0 | 0.000 | | 0.00 | |
| ORR | Oriole Resources Plc | 0.2800 | 0.2610 | 0.2700 | 150.3K | 0.0000 | | 0.00 | |
| OS73 | Toyota Finance Australia Limited | 96.17 | 96.17 | 96.17 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group Plc | 494.4 | 481.0 | 486.6 | 757.0K | -0.4 | | 0.08 | |
| OSEC | Octopus Aim Vct 2 Plc | 30.40 | 30.40 | 30.40 | 0 | 0.00 | | 0.00 | |
| OSX5 | Euro Stoxx 50 Ucits ETF B EUR | 59.22 | 59.22 | 59.22 | 100 | -0.50 | | 0.84 | |
| OT06 | Derwent London PLC | 72.10 | 72.10 | 72.10 | 9.6K | 0.00 | | 0.00 | |
| OT1 | Oxford Technology 2 Venture Capital | 19.50 | 19.50 | 19.50 | 0 | 0.00 | | 0.00 | |
| OT3 | Oxford Technology 2 Venture Capital | 10.000 | 10.000 | 10.000 | 0 | 0.000 | | 0.00 | |
| OT4 | Oxford Technology 2 Venture Capital | 8.500 | 8.500 | 8.500 | 0 | 0.000 | | 0.00 | |
| OTB | On The Beach Group Plc | 186.2 | 178.0 | 178.0 | 272.3K | -7.2 | | 3.89 | |
| OTES | Hellenic Telecommunications Organization | 10.82 | 10.75 | 10.79 | 100 | 0.15 | | 1.41 | |
| OTPD | Gdr [Each Repr 1/2 Ord Huf100][Reg S] | 17.00 | 17.00 | 17.00 | 0 | 0.00 | | 0.00 | |
| OTV2 | Octopus Titan Vct Plc | 18.50 | 18.50 | 18.50 | 0 | 0.00 | | 0.00 | |
| OVCT | Oberon Aim Vct Plc | 19.00 | 19.00 | 19.00 | 0 | 0.00 | | 0.00 | |
| OVZA | Wisdomtree Metal Securities Limited | 117.8 | 115.2 | 117.6 | 100 | -16.0 | | 11.95 | |
| OVZB | Wisdomtree Metal Securities Limited | 79.50 | 76.10 | 79.50 | 100 | -2.67 | | 3.25 | |
| OVZC | Wisdomtree Physical Silver | 46.81 | 39.48 | 46.81 | 6.4K | 0.05 | | 0.10 | |
| OXA1 | Physical Gold Euro Hdg Etc | 218.1 | 218.1 | 218.1 | 100 | -15.0 | | 6.44 | |
| OXA2 | Physical Silver Euro Hdg Etc | 258.4 | 258.4 | 258.4 | 413 | -8.9 | | 3.33 | |
| OXA5 | Physical Gold Etc 27/08/60 | 351.4 | 351.4 | 351.4 | 2.4K | -4.6 | | 1.28 | |
| OXA6 | Physical Silver Etc 27/08/60 | 476.2 | 476.2 | 476.2 | 283 | -3.1 | | 0.65 | |
| OXB | Oxford Biomedica Plc | 550.0 | 519.0 | 545.0 | 468.9K | 13.0 | | 2.44 | |
| OXH | Oxford Technology 2 Venture Capital | 8.500 | 8.500 | 8.500 | 0 | 0.000 | | 0.00 | |
| OXIG | Oxford Instruments Plc | 2,644 | 2,480 | 2,598 | 158.6K | 10 | | 0.39 | |
| OY69 | Province Of Saskatchewan | 98.45 | 98.45 | 98.45 | 0 | -0.02 | | 0.02 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |