| OAP3 | Octopus Apollo Vct Plc | 45.70 | 45.70 | 45.70 | 0 | 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 | 0.0800 | 0.0950 | 61.85M | -0.0050 | | 5.00 | |
| OBI | Ondine Biomedical Inc | 15.40 | 15.13 | 15.40 | 309.7K | 0.40 | | 2.67 | |
| OCDO | Ocado Group Plc | 189.2 | 176.1 | 189.2 | 2.66M | 10.0 | | 5.58 | |
| OCI | Oakley Capital Investments Limited | 482.0 | 477.0 | 478.0 | 478.6K | 0.0 | | 0.00 | |
| OCTF | First Trust Global Funds Icav | 2,199 | 2,199 | 2,199 | 0 | 4 | | 0.19 | |
| 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 | 0 | 0.000 | | 0.00 | |
| OGG9 | Gold Bullion Securities | 324.8 | 324.8 | 324.8 | 0 | -17.2 | | 5.03 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 113.1 | 112.0 | 113.1 | 10.2K | -0.7 | | 0.61 | |
| OGN | Origin Enterprises Plc | 387.8 | 375.0 | 375.0 | 100 | -5.0 | | 1.32 | |
| OGOL | Global X Metal Securities | 52.82 | 52.82 | 52.82 | 141.2K | -0.71 | | 1.32 | |
| OGZU | Wisdomtree Metal Securities Limited | 342.8 | 332.4 | 338.2 | 141 | -18.2 | | 5.09 | |
| OHGR | One Health Group Plc | 245.5 | 241.1 | 243.5 | 14.9K | -3.5 | | 1.42 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 102.5 | 102.5 | 102.5 | 0 | 0.0 | | 0.00 | |
| OIG | Oryx International Growth Fund Ltd | 1,265 | 1,225 | 1,240 | 6.3K | -3 | | 0.20 | |
| OIGB | Vaneck Oil Services Ucits ETF | 23.14 | 22.49 | 22.62 | 3.8K | -0.47 | | 2.03 | |
| 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 | 30.43 | 29.44 | 30.05 | 17.1K | -0.58 | | 1.90 | |
| OIL | Onyx Etc Securities Public Limited | 152.7 | 150.8 | 150.8 | 100 | -6.2 | | 3.93 | |
| OIL2 | Wisdomtree WTI Crude Oil 2X Daily Lev | 1,116 | 1,059 | 1,059 | 2.1K | -59 | | 5.25 | |
| OIL3 | UBS Etc [Cmci WTI 3M] USD | 113.4 | 113.4 | 113.4 | 0 | -2.5 | | 2.16 | |
| OILG | UBS Etc [Cmci Wti] GBP | 9,552 | 9,552 | 9,552 | 0 | -129 | | 1.33 | |
| OILU | UBS Etc [Ubs BBG CMCI WTI Crude Idx] USD | 156.6 | 156.6 | 156.6 | 0 | -2.1 | | 1.32 | |
| OIP9 | Shell International Finance B.V | 97.52 | 97.52 | 97.52 | 0 | 0.00 | | 0.00 | |
| OIT | Odyssean Investment Trust Plc | 207.0 | 206.0 | 207.0 | 145.2K | -1.0 | | 0.48 | |
| OKL3 | Leverage Shares Public Limited Company | 3.049 | 2.498 | 2.768 | 7.3K | 0.310 | | 12.61 | |
| OM9S | Yorkshire Water Finance PLC | 78.72 | 78.72 | 78.72 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics Plc | 40.00 | 38.60 | 39.20 | 122.4K | -0.10 | | 0.25 | |
| OMI | Orosur Mining Inc | 18.00 | 16.50 | 16.95 | 2.61M | -0.70 | | 3.97 | |
| OMIP | One Media Ip Group Plc | 4.320 | 4.150 | 4.150 | 165 | 0.000 | | 0.00 | |
| OMU | Old Mutual Limited | 62.80 | 60.60 | 61.20 | 26.4K | -0.80 | | 1.29 | |
| OMXS | Ishares Omx Stockholm Capped Ucits ETF | 833.3 | 822.0 | 824.4 | 4.6K | -10.1 | | 1.21 | |
| ONDO | Ondo Insurtech Plc | 7.140 | 6.500 | 6.700 | 2.46M | -0.100 | | 1.47 | |
| ONT | Oxford Nanopore Technologies Plc | 132.4 | 121.9 | 130.9 | 1.29M | 6.8 | | 5.48 | |
| ONWD | Onward Opportunities Limited | 125.0 | 124.6 | 125.0 | 3.4K | 0.0 | | 0.00 | |
| OOA | Octopus Aim Vct Plc | 39.80 | 39.80 | 39.80 | 0 | 0.00 | | 0.00 | |
| OPEN | Ish Re Incl / Diversity ETF | 12.16 | 12.09 | 12.16 | 4.1K | -0.11 | | 0.93 | |
| OPT | Optima Health Plc | 193.0 | 190.0 | 190.0 | 88.8K | -1.5 | | 0.78 | |
| OPTI | Optibiotix Health Plc | 6.500 | 6.300 | 6.450 | 233.8K | 0.050 | | 0.78 | |
| OQ12 | Standard Chartered PLC | 91.37 | 91.37 | 91.02 | 0 | 0.00 | | 0.00 | |
| ORC1 | Orchard Bond Finance PLC | 96.25 | 96.25 | 96.75 | 0 | 0.00 | | 0.00 | |
| ORC3 | Leverage Shares Public Limited Company | 5.590 | 5.040 | 5.250 | 32.9K | 0.062 | | 1.20 | |
| ORCA | Orcadian Energy Plc | 12.25 | 12.25 | 12.25 | 100 | 0.00 | | 0.00 | |
| ORCH | Orchard Funding Group Plc | 63.24 | 61.00 | 63.00 | 19.7K | 0.00 | | 0.00 | |
| ORCP | Oracle Power Plc | 0.0600 | 0.0500 | 0.0550 | 107.9M | -0.0010 | | 1.79 | |
| ORCY | Leverage Shares Public Limited Company | 6.965 | 6.810 | 6.810 | 100 | -0.803 | | 10.55 | |
| ORIT | Octopus Renewables Infrastructure Trust | 65.90 | 65.00 | 65.00 | 714.8K | -0.90 | | 1.37 | |
| ORNT | Orient Telecoms Plc | 4.000 | 4.000 | 4.000 | 0 | 0.000 | | 0.00 | |
| ORR | Oriole Resources Plc | 0.3900 | 0.3600 | 0.3700 | 16.47M | 0.0000 | | 0.00 | |
| OS73 | Toyota Finance Australia Limited | 95.17 | 95.17 | 95.17 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group Plc | 536.5 | 518.0 | 534.0 | 392.5K | 15.0 | | 2.89 | |
| OSEC | Octopus Aim Vct 2 Plc | 30.00 | 30.00 | 30.00 | 0 | 0.00 | | 0.00 | |
| OSX5 | Invesco Markets PLC | 60.20 | 60.12 | 60.12 | 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 | 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 | 9.000 | 9.000 | 9.000 | 0 | 0.000 | | 0.00 | |
| OTB | On The Beach Group Plc | 178.6 | 170.4 | 178.4 | 263.6K | 3.6 | | 2.06 | |
| OTES | Hellenic Telecommunications Organization | 11.31 | 10.75 | 11.31 | 0 | 0.19 | | 1.71 | |
| 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 | 23.50 | 20.00 | 23.50 | 1.0K | 0.00 | | 0.00 | |
| OVZA | Wisdomtree Metal Securities Limited | 140.5 | 122.8 | 140.5 | 100 | 0.3 | | 0.19 | |
| OVZB | Wisdomtree Metal Securities Limited | 97.79 | 94.44 | 97.22 | 100 | 0.27 | | 0.28 | |
| OVZC | Wisdomtree Metal Securities Limited | 48.70 | 45.72 | 48.09 | 5.2K | 1.65 | | 3.56 | |
| OXA1 | Physical Gold Euro Hdg Etc | 245.9 | 224.3 | 245.9 | 1.3K | 1.6 | | 0.63 | |
| OXA2 | Physical Silver Euro Hdg Etc | 309.1 | 309.1 | 309.1 | 100 | 11.0 | | 3.70 | |
| OXA5 | Physical Gold Etc 27/08/60 | 344.9 | 340.9 | 340.9 | 170 | 1.1 | | 0.32 | |
| OXA6 | Physical Silver Etc 27/08/60 | 479.3 | 479.3 | 479.3 | 0 | -85.1 | | 15.07 | |
| OXB | Oxford Biomedica Plc | 646.0 | 621.0 | 623.0 | 420.6K | -1.0 | | 0.16 | |
| OXH | Oxford Technology 2 Venture Capital | 8.500 | 8.500 | 8.500 | 0 | 0.000 | | 0.00 | |
| OXIG | Oxford Instruments Plc | 3,118 | 3,032 | 3,086 | 247.9K | 38 | | 1.25 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |