| 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 | 0.1060 | 0.0800 | 0.1060 | 18.35M | 0.0160 | | 17.78 | |
| OBI | Ondine Biomedical Inc | 15.00 | 14.61 | 14.90 | 990.1K | -0.10 | | 0.67 | |
| OCDO | Ocado Group Plc | 185.3 | 177.8 | 181.5 | 2.62M | -2.7 | | 1.45 | |
| OCI | Oakley Capital Investments Limited | 499.0 | 487.2 | 492.0 | 49.3K | 2.0 | | 0.41 | |
| OCTF | First Trust Global Funds Icav | 2,181 | 2,181 | 2,181 | 0 | -18 | | 0.82 | |
| 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 | 338.2 | 326.6 | 338.2 | 1.8K | 13.4 | | 4.12 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 117.6 | 117.4 | 117.6 | 5.1K | 4.1 | | 3.65 | |
| OGN | Origin Enterprises Plc | 377.8 | 355.0 | 365.0 | 18.0K | 0.0 | | 0.00 | |
| OGOL | Global X Metal Securities | 53.92 | 53.92 | 53.92 | 1.2K | 1.10 | | 2.08 | |
| OGZU | Wisdomtree Metal Securities Limited | 348.9 | 348.4 | 348.7 | 1.2K | 3.7 | | 1.06 | |
| OHGR | One Health Group Plc | 243.5 | 240.0 | 241.0 | 24.6K | -2.5 | | 1.03 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 102.5 | 102.5 | 102.5 | 0 | 0.0 | | 0.00 | |
| OIG | Oryx International Growth Fund Ltd | 1,260 | 1,220 | 1,235 | 11.8K | -20 | | 1.59 | |
| OIGB | Vaneck Oil Services Ucits ETF | 22.26 | 22.07 | 22.21 | 5.6K | -0.02 | | 0.10 | |
| 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 | 29.78 | 29.50 | 29.74 | 9.8K | 0.01 | | 0.03 | |
| OIL | Onyx Etc Securities Public Limited | 149.7 | 149.7 | 149.7 | 0 | -1.1 | | 0.73 | |
| OIL2 | Wisdomtree WTI Crude Oil 2X Daily Lev | 1,071 | 1,067 | 1,067 | 1.9K | 26 | | 2.52 | |
| OIL3 | UBS Etc [Cmci WTI 3M] USD | 112.8 | 112.8 | 112.8 | 0 | -0.6 | | 0.49 | |
| OILG | UBS AG UBS ETC (CMCI WTI) GBP | 11,295 | 9,606 | 9,606 | 0 | 68 | | 0.71 | |
| OILU | UBS Etc [Ubs BBG CMCI WTI Crude Idx] USD | 156.4 | 156.4 | 156.4 | 0 | -0.3 | | 0.16 | |
| OIP9 | Shell International Finance B.V | 97.52 | 97.52 | 97.52 | 0 | 0.00 | | 0.00 | |
| OIT | Odyssean Investment Trust Plc | 212.0 | 206.3 | 206.3 | 149.4K | -2.7 | | 1.27 | |
| OKL3 | Leverage Shares Public Limited Company | 2.723 | 2.513 | 2.723 | 272 | 0.026 | | 0.96 | |
| OM9S | Yorkshire Water Finance PLC | 78.72 | 78.72 | 78.72 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics Plc | 40.90 | 38.10 | 38.10 | 367.2K | -1.40 | | 3.54 | |
| OMI | Orosur Mining Inc | 18.50 | 17.00 | 18.50 | 1.5M | 0.75 | | 4.23 | |
| OMIP | One Media Ip Group Plc | 4.300 | 4.000 | 4.300 | 692 | 0.150 | | 3.61 | |
| OMU | Old Mutual Limited | 63.40 | 61.80 | 61.80 | 8.1K | 0.20 | | 0.32 | |
| OMXS | Ishares Omx Stockholm Capped Ucits ETF | 846.3 | 834.0 | 846.3 | 2.5K | 16.0 | | 1.93 | |
| ONDO | Ondo Insurtech Plc | 7.000 | 5.450 | 6.600 | 1.17M | -0.250 | | 3.65 | |
| ONT | Oxford Nanopore Technologies Plc | 124.8 | 118.9 | 120.4 | 584.8K | -3.3 | | 2.67 | |
| ONWD | Onward Opportunities Limited | 124.8 | 123.4 | 123.4 | 301.7K | -1.1 | | 0.92 | |
| OOA | Octopus Aim Vct Plc | 39.80 | 39.80 | 39.80 | 0 | 0.00 | | 0.00 | |
| OPEN | Ish Re Incl / Diversity ETF | 12.32 | 12.23 | 12.27 | 4.3K | 0.11 | | 0.90 | |
| OPT | Optima Health Plc | 193.0 | 190.0 | 192.0 | 199.6K | 0.5 | | 0.25 | |
| OPTI | Optibiotix Health Plc | 6.500 | 6.400 | 6.400 | 148.1K | -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 | 5.028 | 4.775 | 4.964 | 8.2K | 0.179 | | 3.74 | |
| ORCA | Orcadian Energy Plc | 12.25 | 12.25 | 12.25 | 100 | 0.00 | | 0.00 | |
| ORCH | Orchard Funding Group Plc | 64.00 | 61.00 | 61.00 | 110.2K | -2.00 | | 3.17 | |
| ORCP | Oracle Power Plc | 0.0460 | 0.0400 | 0.0450 | 0 | -0.0050 | | 10.00 | |
| ORCY | Oracle (ORCL) Options ETP | 6.653 | 6.653 | 6.653 | 100 | 0.035 | | 0.53 | |
| ORIT | Octopus Renewables Infrastructure Trust | 65.90 | 64.20 | 64.30 | 370.6K | -0.90 | | 1.38 | |
| ORNT | Orient Telecoms | 5.000 | 4.000 | 4.000 | 0 | 0.000 | | 0.00 | |
| ORR | Oriole Resources Plc | 0.3800 | 0.3600 | 0.3800 | 6.15M | 0.0100 | | 2.70 | |
| OS73 | Toyota Finance Australia Limited | 95.17 | 95.17 | 95.17 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group Plc | 547.0 | 537.0 | 544.0 | 291.3K | 3.0 | | 0.55 | |
| OSEC | Octopus Aim Vct 2 Plc | 30.00 | 30.00 | 30.00 | 0 | 0.00 | | 0.00 | |
| OSX5 | Source Markets Public Limited Company | 61.80 | 61.80 | 61.80 | 0 | 0.19 | | 0.31 | |
| 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 | 35.0K | 0.000 | | 0.00 | |
| OT4 | Oxford Technology 2 Venture Capital | 9.000 | 7.000 | 9.000 | 0 | 0.000 | | 0.00 | |
| OTB | On The Beach Group Plc | 181.8 | 176.0 | 177.8 | 197.4K | -1.0 | | 0.56 | |
| OTES | Hellenic Telecommunications Organization | 11.13 | 10.90 | 11.13 | 0 | 0.00 | | 0.00 | |
| OTPD | Otp Bank PLC | 17.00 | 17.00 | 17.00 | 369 | 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 | 20.00 | 1.0K | -3.50 | | 14.89 | |
| OVZA | Wisdomtree Metal Securities Limited | 132.5 | 131.1 | 131.4 | 100 | 4.5 | | 3.58 | |
| OVZB | Wisdomtree Metal Securities Limited | 102.7 | 101.3 | 102.3 | 100 | 5.3 | | 5.50 | |
| OVZC | Wisdomtree Metal Securities Limited | 49.96 | 49.31 | 49.54 | 9.2K | 2.66 | | 5.66 | |
| OXA1 | Physical Gold Euro Hdg Etc | 235.7 | 235.2 | 235.2 | 100 | 8.0 | | 3.50 | |
| OXA2 | Physical Silver Euro Hdg Etc | 319.1 | 319.1 | 319.1 | 100 | 5.0 | | 1.59 | |
| OXA5 | Physical Gold Etc 27/08/60 | 354.4 | 354.4 | 354.4 | 100 | 13.5 | | 3.95 | |
| OXA6 | Physical Silver Etc 27/08/60 | 511.7 | 510.4 | 510.4 | 100 | -46.2 | | 8.30 | |
| OXB | Oxford Biomedica Plc | 655.0 | 619.0 | 619.0 | 108.0K | -25.0 | | 3.88 | |
| OXH | Oxford Technology 2 Venture Capital | 8.500 | 8.500 | 8.500 | 0 | 0.000 | | 0.00 | |
| OXIG | Oxford Instruments Plc | 3,190 | 2,996 | 3,092 | 93.7K | -6 | | 0.19 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |