| Name | Code | Last | Cur | M. cap. | Industry |
|---|
| ITM Power PLC | XLON:ITM | 37.28 | GBP | 284 | Heavy Electrical Equipment |
| ITV PLC | XLON:ITV | 70.55 | GBP | 3,395 | Broadcasting |
| IWG Plc | XLON:IWG | 150.40 | GBP | 1,881 | Other REITs |
| IXICO PLC | XLON:IXI | 12.00 | GBP | 13 | Biotechnology |
| Jade Road Investments Ltd | XLON:JADE | 0.18 | USD | 68 | Investment Banking & Brokerage Services |
| Jadestone Energy PLC | XLON:JSE | 25.00 | GBP | 167 | Oil and Gas Exploration & Production |
| James Cropper PLC | XLON:CRPR | 210.52 | GBP | 24 | Paper Products |
| James Fisher and Sons PLC | XLON:FSJ | 306.00 | GBP | 190 | Shipping |
| James Halstead PLC | XLON:JHD | 176.50 | GBP | 909 | Construction Supplies & Fixtures |
| James Latham PLC | XLON:LTHM | 1,145.00 | GBP | 281 | Forest & Wood Products |
| Jangada Mines PLC | XLON:JAN | 0.78 | GBP | 2 | Other Metals & Minerals |
| Jardine Matheson Holdings Ltd | XLON:JAR | 40.84 | GBP | 95 | Consumer Goods Conglomerates |
| Jarvis Securities PLC | XLON:JIM | 49.00 | GBP | 27 | Investment Banking & Brokerage Services |
| Jaywing PLC | XLON:JWNG | 1.50 | GBP | 1 | Marketing & Advertising |
| J D Wetherspoon PLC | XLON:JDW | 586.00 | GBP | 875 | Restaurants |
| Jersey Electricity PLC | XLON:JEL | 422.00 | GBP | 159 | Electric Utilities |
| Jersey Oil and Gas PLC | XLON:JOG | 74.00 | GBP | 29 | Oil and Gas Exploration & Production |
| Jet2 PLC | XLON:JET2 | 1,484.00 | GBP | 3,937 | Airlines |
| JLEN Environmental Assets Group Ltd | XLON:JLEN | 85.20 | GBP | 692 | Collective Investments |
| Johnson Matthey PLC | XLON:JMAT | 1,343.00 | GBP | 2,777 | Specialty Chemicals |
| Johnson Service Group PLC | XLON:JSG | 130.00 | GBP | 666 | Business Support Services |
| John Wood Group PLC | XLON:WG. | 187.22 | GBP | 1,810 | Oil Related Services & Equipment |
| JOINT STOCK COMPANY | XLON:KAP | 38.70 | USD | 10,037 | Uranium |
| Journeo PLC | XLON:JNEO | 306.00 | GBP | 62 | Networking & Communications |
| JPEL Private Equity Ltd | XLON:JPEL | 0.79 | GBP | 0 | Collective Investments |
| JPMF Japan Investors | XLON:JFJ | 560.00 | GBP | | |
| JP Morgan American Investment Trust | XLON:JAM | 1,138.00 | GBP | | |
| Jpmorgan Asia Growth & Income PLC | XLON:JAGI | 377.00 | GBP | 349 | Collective Investments |
| JPmorgan Emerging Markets Investment Trust PLC | XLON:JMG | 107.20 | GBP | 1,417 | Collective Investments |
| JPMorgan European Growth & Income PLC | XLON:JEGI | 99.40 | GBP | 519 | |
| JPMorgan Euro Small Co Trust | XLON:JEDT | 444.50 | GBP | | |
| JPMorgan Fleming Claverhouse IT | XLON:JCH | 704.00 | GBP | | |
| JP Morgan Fleming Indian It Plc | XLON:JII | 1,006.00 | GBP | | |
| JPMorgan Fleming Russian Secs PLC Ord 1p | XLON:JEMA | 196.00 | GBP | | |
| JPMorgan Global Core Real Assets Ltd | XLON:JARU | 0.96 | GBP | 2 | Financial & Commodity Market Operators & Service Providers |
| JPmorgan Global Emerging Markets Income Trust PLC | XLON:JEMI | 134.50 | GBP | 474 | Collective Investments |
| JPMorgan Global Growth & Income | XLON:JGGI | 581.00 | GBP | | |
| JPMorgan Japan Small Cap Growth & Income PLC | XLON:JSGI | 322.00 | GBP | 214 | Collective Investments |
| JP Morgan US Smaller Co. Inv Trust | XLON:JUSC | 471.00 | GBP | | |
| J Sainsbury PLC | XLON:SBRY | 272.00 | GBP | 7,762 | Food Retail & Distribution |
| J Smart & Co (Contractors) PLC | XLON:SMJ | 125.00 | GBP | 60 | Engineering & Construction |
| JTC PLC | XLON:JTC | 940.00 | GBP | 1,953 | Investment Management & Fund Operators |
| Jubilee Metals Group PLC | XLON:JLP | 3.40 | GBP | 126 | Platinum |
| Judges Scientific PLC | XLON:JDG | 8,320.00 | GBP | 683 | Industrial Machinery & Equipment |
| Jupiter European Opps Tr Plc Ord1p | XLON:EOT | 795.00 | GBP | | |
| Jupiter Fund Management PLC | XLON:JUP | 84.50 | GBP | 537 | Investment Management & Fund Operators |
| Jupiter Green Investment Trust | XLON:JGC | 236.20 | GBP | | |
| Jupiter US Smaller Companies PLC | XLON:BASC | 1,422.50 | GBP | | |
| Just Group PLC | XLON:JUST | 150.20 | GBP | 1,928 | Life & Health Insurance |
| JZ Capital Partners | XLON:JZCP | 198.00 | GBP | | |