| OAP3 | Octopus Apollo Vct Plc | 46.70 | 46.60 | 46.70 | 370 | 0.00 | | 0.00 | |
| OAUE | UBS Etf | 42.76 | 42.76 | 42.76 | 19 | 0.00 | | 0.00 | |
| OBD | Oxford Biodynamics Plc | 0.2200 | 0.2000 | 0.2100 | 6.08M | 0.0000 | | 0.00 | |
| OBI | Ondine Biomedical Inc | 11.00 | 10.50 | 10.75 | 18.8K | 0.00 | | 0.00 | |
| OCDO | Ocado Group Plc | 195.5 | 187.2 | 187.4 | 2.26M | -0.3 | | 0.13 | |
| OCI | Oakley Capital Investments Limited | 468.0 | 452.5 | 468.0 | 140.8K | 24.0 | | 5.41 | |
| OCTF | First Trust Global Funds Public Limited | 2,004 | 2,004 | 2,004 | 0 | 8 | | 0.41 | |
| 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 | 79.50 | 79.50 | 79.50 | 0 | 0.00 | | 0.00 | |
| OGDC | Oil and Gas Development Company Limited | 8.200 | 8.200 | 8.200 | 0 | 0.000 | | 0.00 | |
| OGG9 | Gold Bullion Securities | 408.8 | 408.8 | 408.8 | 3.4K | 2.0 | | 0.49 | |
| OGLD | Deutsche Boerse Commodities Gmbh | 127.0 | 117.3 | 117.3 | 1.0K | -27.1 | | 18.76 | |
| OGN | Origin Enterprises Plc | 370.0 | 370.0 | 370.0 | 0 | 0.0 | | 0.00 | |
| OGOL | Global X Metal Securities | 60.22 | 60.22 | 60.22 | 434 | 2.95 | | 5.15 | |
| OGZU | Wisdomtree Metal Securities Limited | 377.7 | 352.9 | 352.9 | 100 | -75.0 | | 17.52 | |
| OHGR | One Health Group Plc | 243.5 | 236.7 | 243.0 | 18.8K | 0.0 | | 0.00 | |
| OI20 | Kingdom Of Saudi Arabia (The) | 101.5 | 101.5 | 101.5 | 0 | 0.0 | | 0.00 | |
| OIG | Oryx International Growth Fund Ltd | 1,245 | 1,160 | 1,190 | 6.3K | 3 | | 0.21 | |
| OIGB | Vaneck Oil Services Ucits ETF | 25.26 | 24.39 | 25.06 | 92.9K | -0.09 | | 0.34 | |
| 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 | 33.79 | 33.25 | 33.53 | 61.9K | -0.05 | | 0.13 | |
| OIL2 | Wisdomtree WTI Crude Oil 2X Daily Lev | 1,494 | 1,388 | 1,494 | 39.7K | -71 | | 4.55 | |
| OIL3 | UBS Etc [Cmci WTI 3M] USD | 124.5 | 124.5 | 124.5 | 0 | -2.8 | | 2.22 | |
| OILG | UBS Etc [Cmci Wti] GBP | 10,408 | 10,408 | 10,408 | 0 | 0 | | 0.00 | |
| OILU | UBS Etc [Ubs BBG CMCI WTI Crude Idx] USD | 168.3 | 168.3 | 168.3 | 0 | -2.7 | | 1.57 | |
| OIP9 | Shell International Finance B.V | 97.08 | 97.08 | 97.08 | 0 | -0.62 | | 0.63 | |
| OIT | Odyssean Investment Trust Plc | 179.5 | 176.0 | 177.5 | 60.3K | 2.5 | | 1.43 | |
| OM9S | Yorkshire Water Finance PLC | 77.48 | 77.48 | 77.48 | 0 | 0.00 | | 0.00 | |
| OMG | Oxford Metrics Plc | 45.90 | 44.00 | 45.70 | 247.8K | 1.70 | | 3.86 | |
| OMI | Orosur Mining Inc | 19.50 | 17.50 | 17.75 | 1.99M | -0.25 | | 1.39 | |
| OMIP | One Media Ip Group Plc | 3.400 | 3.400 | 3.400 | 375.0K | 0.050 | | 1.49 | |
| OMU | Old Mutual Limited | 62.40 | 59.80 | 62.40 | 100.4K | 4.40 | | 7.59 | |
| OMXS | Ishares Omx Stockholm Capped Ucits ETF | 778.3 | 765.6 | 765.6 | 38.3K | 8.9 | | 1.17 | |
| ONDO | Ondo Insurtech Plc | 14.98 | 14.53 | 14.75 | 52.9K | 0.10 | | 0.68 | |
| ONT | Oxford Nanopore Technologies Plc | 121.9 | 117.5 | 121.6 | 1.21M | 4.8 | | 4.11 | |
| ONWD | Onward Opportunities Limited | 123.5 | 123.5 | 123.5 | 0 | 0.0 | | 0.00 | |
| OOA | Octopus Aim Vct Plc | 37.80 | 37.80 | 37.80 | 0 | -0.80 | | 2.07 | |
| OPEN | Ish Re Incl / Diversity ETF | 9.921 | 9.921 | 9.921 | 100 | 0.118 | | 1.20 | |
| OPT | Optima Health Plc | 181.2 | 178.8 | 180.0 | 45.0K | 0.0 | | 0.00 | |
| OPTI | Optibiotix Health Plc | 5.250 | 5.000 | 5.250 | 20.4K | 0.000 | | 0.00 | |
| OQ12 | Standard Chartered PLC | 91.00 | 91.00 | 91.00 | 0 | 0.00 | | 0.00 | |
| ORC1 | Orchard Bond Finance PLC | 103.0 | 103.0 | 100.5 | 0 | 2.2 | | 2.21 | |
| ORCA | Orcadian Energy Plc | 15.00 | 13.10 | 13.50 | 119.2K | -1.00 | | 6.90 | |
| ORCH | Orchard Funding Group Plc | 58.00 | 55.00 | 56.50 | 1.8K | 0.50 | | 0.89 | |
| ORCP | Oracle Power Plc | 0.0450 | 0.0400 | 0.0440 | 98.86M | 0.0010 | | 2.33 | |
| ORIT | Octopus Renewables Infrastructure Trust | 59.00 | 57.30 | 57.70 | 1.19M | 0.40 | | 0.70 | |
| ORNT | Orient Telecoms Plc | 4.000 | 4.000 | 4.000 | 0 | 0.000 | | 0.00 | |
| ORR | Oriole Resources Plc | 0.3000 | 0.2900 | 0.2900 | 1.43M | 0.0000 | | 0.00 | |
| OS73 | Toyota Finance Australia Limited | 96.04 | 96.04 | 96.04 | 0 | 0.00 | | 0.00 | |
| OSB | Osb Group Plc | 555.5 | 542.0 | 549.5 | 568.3K | 11.5 | | 2.14 | |
| OSEC | Octopus Aim Vct 2 Plc | 30.00 | 30.00 | 30.00 | 0 | -0.80 | | 2.60 | |
| OSX5 | Source Markets Public Limited Company | 54.61 | 53.91 | 53.91 | 736 | 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 | 14.50 | 14.50 | 14.50 | 0 | 0.00 | | 0.00 | |
| OT3 | Oxford Technology 2 Venture Capital | 7.500 | 7.500 | 7.500 | 0 | 0.000 | | 0.00 | |
| OT4 | Oxford Technology 2 Venture Capital | 7.500 | 7.500 | 7.500 | 0 | 0.000 | | 0.00 | |
| OTB | On The Beach Group Plc | 169.0 | 163.6 | 166.6 | 398.7K | 2.8 | | 1.71 | |
| OTES | Hellenic Telecommunications Organization | 9.600 | 9.600 | 9.600 | 0 | 0.000 | | 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 | 21.50 | 21.50 | 21.50 | 817.9K | 0.00 | | 0.00 | |
| OVB | Ovoca Bio PLC | 7.920 | 7.000 | 7.300 | 513.9K | 0.000 | | 0.00 | |
| OVCT | Oberon Aim Vct Plc | 25.70 | 25.70 | 25.70 | 0 | 0.00 | | 0.00 | |
| OVZA | Wisdomtree Metal Securities Limited | 156.3 | 141.6 | 141.6 | 100 | -32.5 | | 18.65 | |
| OVZB | Wisdomtree Metal Securities Limited | 116.1 | 112.7 | 112.7 | 100 | 0.9 | | 0.78 | |
| OVZC | Wisdomtree Metal Securities Limited | 57.84 | 50.79 | 50.79 | 5.8K | -18.82 | | 27.03 | |
| OXA1 | Physical Gold Euro Hdg Etc | 260.8 | 258.9 | 259.3 | 100 | -6.1 | | 2.31 | |
| OXA2 | Physical Silver Euro Hdg Etc | 383.2 | 374.0 | 377.5 | 100 | -86.9 | | 18.71 | |
| OXA5 | Physical Gold Etc 27/08/60 | 378.3 | 369.5 | 369.5 | 100 | 3.4 | | 0.93 | |
| OXA6 | Physical Silver Etc 27/08/60 | 594.0 | 545.5 | 545.5 | 100 | -170.4 | | 23.80 | |
| OXB | Oxford Biomedica Plc | 608.0 | 580.0 | 606.0 | 401.4K | 13.0 | | 2.19 | |
| OXH | Oxford Technology 2 Venture Capital | 7.000 | 7.000 | 7.000 | 0 | 0.000 | | 0.00 | |
| OXIG | Oxford Instruments Plc | 2,545 | 2,450 | 2,525 | 522.4K | 65 | | 2.64 | |
| OZ76 | Nationwide Building Society | 98.25 | 98.25 | 98.25 | 578.0K | 0.00 | | 0.00 | |