| 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 | 0.2000 | 0.1600 | 0.1690 | 18.72M | -0.0160 | | 8.65 | |
| OBI | Ondine Biomedical Inc | 15.50 | 14.50 | 15.00 | 534.7K | 0.00 | | 0.00 | |
| OCDO | Ocado Group Plc | 213.1 | 200.4 | 205.8 | 2.96M | 4.8 | | 2.39 | |
| OCI | Oakley Capital Investments Limited | 520.0 | 505.5 | 520.0 | 482.5K | 8.0 | | 1.56 | |
| OCTF | First Trust Global Funds Icav | 2,165 | 2,165 | 2,165 | 0 | -2 | | 0.07 | |
| OE08 | Bank Of Montreal | 100.4 | 100.4 | 100.4 | 1.0M | 0.0 | | 0.00 | |
| OE61 | The Kingdom Of Morocco | 107.1 | 107.1 | 107.1 | 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 | 355.8 | 354.0 | 354.0 | 1.1K | -2.9 | | 0.82 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 125.1 | 125.1 | 125.1 | 562 | 3.6 | | 2.94 | |
| OGN | Origin Enterprises Plc | 397.5 | 397.5 | 397.5 | 0 | 0.0 | | 0.00 | |
| OGOL | Global X Metal Securities | 57.00 | 57.00 | 57.00 | 150.1K | -0.81 | | 1.40 | |
| OGZU | Wisdomtree Metal Securities Limited | 372.6 | 369.8 | 369.9 | 100 | -3.8 | | 1.00 | |
| OHGR | One Health Group Plc | 251.5 | 251.5 | 251.5 | 0 | 0.0 | | 0.00 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 102.7 | 102.7 | 102.7 | 0 | 0.0 | | 0.00 | |
| OIG | Oryx International Growth Fund Ltd | 1,264 | 1,241 | 1,258 | 3.6K | 0 | | 0.00 | |
| OIGB | Vaneck Oil Services Ucits ETF | 26.18 | 25.28 | 26.06 | 6.3K | 0.59 | | 2.32 | |
| 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 | 35.30 | 34.09 | 35.12 | 13.0K | 0.86 | | 2.51 | |
| OIL2 | Wisdomtree WTI Crude Oil 2X Daily Lev | 1,746 | 1,703 | 1,727 | 15.7K | -82 | | 4.52 | |
| OIL3 | UBS Etc [Cmci WTI 3M] USD | 140.0 | 140.0 | 140.0 | 0 | -2.5 | | 1.72 | |
| OILG | UBS Etc [Cmci Wti] GBP | 11,188 | 11,188 | 11,188 | 0 | -100 | | 0.89 | |
| OILU | UBS Etc [Ubs BBG CMCI WTI Crude Idx] USD | 183.0 | 183.0 | 183.0 | 0 | -1.7 | | 0.91 | |
| OIP9 | Shell International Finance B.V | 97.52 | 97.52 | 97.52 | 0 | 0.00 | | 0.00 | |
| OIT | Odyssean Investment Trust Plc | 213.0 | 205.4 | 209.0 | 129.0K | -3.0 | | 1.42 | |
| OKL3 | Leverage Shares Public Limited Company | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OKL3 | Leverage Shares Public Limited Company | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OKL3 | Leverage Shares Public Limited Company | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OKL3 | Leverage Shares Public Limited Company | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OKL3 | Leverage Shares Public Limited Company | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OKL3 | Leverage Shares Public Limited Company | 0.0000 | 0.0000 | 0.0000 | 0 | 0.0000 | | NaN | |
| OKL3 | Leverage Shares Public Limited Company | 8.630 | 6.813 | 8.215 | 9.5K | 0.577 | | 7.55 | |
| OM9S | Yorkshire Water Finance PLC | 78.72 | 78.72 | 78.72 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics Plc | 49.00 | 46.10 | 47.00 | 208.8K | -1.50 | | 3.09 | |
| OMI | Orosur Mining Inc | 20.00 | 19.50 | 19.75 | 877.8K | 0.10 | | 0.51 | |
| OMIP | One Media Ip Group Plc | 4.700 | 4.600 | 4.600 | 650 | 0.000 | | 0.00 | |
| OMU | Old Mutual Limited | 59.40 | 58.20 | 58.40 | 98.1K | 0.00 | | 0.00 | |
| OMXS | Ishares Omx Stockholm Capped Ucits ETF | 846.8 | 830.3 | 846.8 | 15.2K | 13.3 | | 1.59 | |
| ONDO | Ondo Insurtech Plc | 3.500 | 3.400 | 3.450 | 316.3K | 0.000 | | 0.00 | |
| ONT | Oxford Nanopore Technologies Plc | 148.7 | 132.9 | 136.2 | 1.19M | 0.2 | | 0.15 | |
| ONWD | Onward Opportunities Limited | 127.9 | 126.3 | 127.0 | 54.8K | 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 | 12.15 | 12.08 | 12.11 | 159.8K | -0.04 | | 0.29 | |
| OPT | Optima Health Plc | 189.0 | 185.0 | 187.0 | 323.2K | 0.0 | | 0.00 | |
| OPTI | Optibiotix Health Plc | 6.500 | 6.000 | 6.250 | 238.3K | 0.000 | | 0.00 | |
| OQ12 | Standard Chartered PLC | 91.37 | 91.37 | 91.02 | 0 | 0.00 | | 0.00 | |
| ORC1 | Orchard Bond Finance PLC | 97.00 | 96.85 | 96.75 | 0 | 0.00 | | 0.00 | |
| ORC3 | Leverage Shares Public Limited Company | 28.60 | 24.99 | 26.93 | 18.5K | -0.35 | | 1.26 | |
| ORCA | Orcadian Energy Plc | 14.40 | 13.50 | 14.00 | 28.9K | -0.25 | | 1.75 | |
| ORCH | Orchard Funding Group Plc | 56.00 | 53.17 | 54.50 | 29.9K | 0.50 | | 0.93 | |
| ORCP | Oracle Power Plc | 0.0600 | 0.0500 | 0.0600 | 179.42M | 0.0010 | | 1.69 | |
| ORCY | Leverage Shares Public Limited Company | 11.80 | 11.80 | 11.80 | 0 | -0.29 | | 2.38 | |
| ORIT | Octopus Renewables Infrastructure Trust | 64.90 | 63.80 | 63.80 | 1.08M | -0.50 | | 0.78 | |
| ORNT | Orient Telecoms Plc | 4.000 | 4.000 | 4.000 | 0 | 0.000 | | 0.00 | |
| ORR | Oriole Resources Plc | 0.3800 | 0.3300 | 0.3700 | 114.74M | 0.0350 | | 10.45 | |
| OS73 | Toyota Finance Australia Limited | 95.17 | 95.17 | 95.17 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group Plc | 516.0 | 494.0 | 506.0 | 1.09M | 1.0 | | 0.20 | |
| OSEC | Octopus Aim Vct 2 Plc | 31.00 | 25.00 | 30.00 | 3.6K | 0.00 | | 0.00 | |
| OSX5 | Source Markets Public Limited Company | 60.09 | 60.09 | 60.09 | 0 | 0.18 | | 0.30 | |
| 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 | 3.00 | | 18.18 | |
| OT3 | Oxford Technology 2 Venture Capital | 10.000 | 10.000 | 10.000 | 0 | 1.000 | | 11.11 | |
| OT4 | Oxford Technology 2 Venture Capital | 9.000 | 9.000 | 9.000 | 0 | 0.000 | | 0.00 | |
| OTB | On The Beach Group Plc | 147.2 | 140.4 | 145.2 | 563.3K | 1.4 | | 0.97 | |
| OTES | Hellenic Telecommunications Organization | 10.80 | 10.75 | 10.78 | 2 | 0.00 | | 0.00 | |
| 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 | 19.50 | 19.50 | 19.50 | 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 | 154.7 | 150.9 | 151.9 | 100 | 0.7 | | 0.44 | |
| OVZB | Wisdomtree Metal Securities Limited | 109.2 | 106.6 | 108.0 | 100 | 1.7 | | 1.58 | |
| OVZC | Wisdomtree Metal Securities Limited | 60.18 | 58.01 | 58.01 | 3.9K | -1.84 | | 3.08 | |
| OXA1 | Physical Gold Euro Hdg Etc | 259.0 | 259.0 | 259.0 | 450 | 5.3 | | 2.08 | |
| OXA2 | Physical Silver Euro Hdg Etc | 390.1 | 390.1 | 390.1 | 100 | 7.0 | | 1.82 | |
| OXA5 | Physical Gold Etc 27/08/60 | 372.1 | 371.0 | 372.1 | 100 | 9.6 | | 2.64 | |
| OXA6 | Physical Silver Etc 27/08/60 | 596.8 | 596.8 | 596.8 | 100 | -18.2 | | 2.95 | |
| OXB | Oxford Biomedica Plc | 628.0 | 575.0 | 575.0 | 949.9K | -41.0 | | 6.66 | |
| OXH | Oxford Technology 2 Venture Capital | 8.500 | 8.500 | 8.500 | 0 | 0.500 | | 6.25 | |
| OXIG | Oxford Instruments Plc | 3,278 | 3,204 | 3,232 | 411.9K | -2 | | 0.06 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |