| Name | Code | Last | Cur | M. cap. | Industry |
|---|
| Network International Holdings PLC | XLON:NETW | 399.40 | GBP | 2,622 | Business Support Services |
| Net Zero Infrastructure PLC | XLON:NZI | 1.35 | GBP | 1 | Investment Management & Fund Operators |
| Newmark Security PLC | XLON:NWT | 70.00 | GBP | 8 | Networking & Communications |
| Newriver Reit PLC | XLON:NRR | 70.40 | GBP | 408 | Other REITs |
| New Star Investment Trust plc | XLON:NSI | 108.00 | GBP | | |
| NextEnergy Solar Fund Ltd | XLON:NESF | 61.90 | GBP | 442 | Collective Investments |
| Next Fifteen Communications Group plc | XLON:NFG | 342.00 | GBP | 424 | |
| Next PLC | XLON:NXT | 9,514.00 | GBP | 13,797 | Apparel Retailers |
| Nexus Infrastructure PLC | XLON:NEXS | 125.00 | GBP | 13 | Engineering & Construction |
| Nichols PLC | XLON:NICL | 1,285.00 | GBP | 577 | Non-Alcoholic Drink |
| Ninety One PLC | XLON:N91 | 140.00 | GBP | 1,537 | Investment Management & Fund Operators |
| Niox Group PLC | XLON:NIOX | 44.17 | GBP | 97 | Pharmaceuticals |
| Nippon Active Value Fund PLC | XLON:NAVF | 190.00 | GBP | 441 | Collective Investments |
| Norcros PLC | XLON:NXR | 250.00 | GBP | 276 | Construction Supplies & Fixtures |
| Norman Broadbent PLC | XLON:NBB | 3.25 | GBP | 2 | Employment Services |
| Northamber PLC | XLON:NAR | 28.50 | GBP | 9 | Computer & Electronics Retailers |
| North American Income Trust PLC | XLON:NAIT | 332.00 | GBP | 508 | Collective Investments |
| North American Investment Trust | XLON:NAIT | 332.00 | GBP | | |
| North Atlantic Smaller Cos Inv Tr PLC | XLON:NAS | 3,640.00 | GBP | | |
| Northcoders Group PLC | XLON:CODE | 165.00 | GBP | 16 | IT Services & Consulting |
| Northern 2 VCT PLC | XLON:NTV | 52.50 | GBP | 142 | Investment Management & Fund Operators |
| Northern 3 VCT PLC | XLON:NTN | 84.00 | GBP | 150 | Investment Management & Fund Operators |
| Northern Bear PLC | XLON:NTBR | 56.00 | GBP | 9 | Engineering & Construction |
| Northern Electric PLC | XLON:NTEA | 122.00 | GBP | 167 | Electric Utilities |
| Northern Venture Trust PLC | XLON:NVT | 55.50 | GBP | 135 | Collective Investments |
| Nostra Terra Oil and Gas Company PLC | XLON:NTOG | 0.03 | GBP | 1 | Oil and Gas Exploration & Production |
| Nostrum Oil & Gas PLC | XLON:NOG | 3.28 | GBP | 6 | Oil and Gas Exploration & Production |
| Novacyt SA | XLON:NCYT | 60.40 | GBP | 44 | Biotechnology |
| Nova Ljubljanska Banka dd Ljubljana | XLON:NLB | 25.30 | EUR | 13,025 | Banks |
| Nuformix PLC | XLON:NFX | 0.05 | GBP | 0 | Pharmaceuticals |
| NWF Group PLC | XLON:NWF | 153.00 | GBP | 93 | Oil and Gas Refining |
| Oakley Capital Investments Ltd | XLON:OCI | 498.00 | GBP | 1,080 | Collective Investments |
| Ocado Group PLC | XLON:OCDO | 279.00 | GBP | 2,860 | Department Stores |
| Ocean Wilsons Holdings Ltd | XLON:OCN | 1,310.00 | GBP | 569 | Marine Port |
| Octopus AIM VCT PLC | XLON:OOA | 52.00 | GBP | 143 | Investment Management & Fund Operators |
| Octopus Apollo VCT PLC | XLON:OAP3 | 43.80 | GBP | 518 | Investment Management & Fund Operators |
| Octopus Future Generations Vct PLC | XLON:OFG | | GBP | | Investment Management & Fund Operators |
| Octopus Renewables Infrastructure Trust PLC | XLON:ORIT | 66.30 | GBP | 453 | Collective Investments |
| Octopus Titan VCT PLC | XLON:OTV2 | 43.50 | GBP | 881 | Investment Management & Fund Operators |
| Odyssean Investment Trust PLC | XLON:OIT | 148.50 | GBP | 246 | Collective Investments |
| Old Mutual Ltd | XLON:OMU | 54.70 | GBP | 2,830 | Life & Health Insurance |
| Omega Diagnostics Group PLC | XLON:CNSL | 1.75 | GBP | 5 | Medical Equipment |
| Oncimmune Holdings PLC | XLON:ONC | 13.50 | GBP | 18 | Pharmaceuticals |
| Ondine Biomedical Inc | XLON:OBI | 8.77 | GBP | 43 | Medical Equipment |
| Ondo InsurTech PLC | XLON:ONDO | 37.00 | GBP | 59 | Multiline Insurance & Brokers |
| One Heritage Group PLC | XLON:OHG | 5.00 | GBP | 2 | Other REITs |
| One Media IP Group PLC | XLON:OMIP | 4.25 | GBP | 11 | Entertainment Production |
| On The Beach Group PLC | XLON:OTB | 240.50 | GBP | 480 | Leisure |
| OPG Power Ventures PLC | XLON:OPG | 6.00 | GBP | 29 | Electric Utilities |
| OptiBiotix Health PLC | XLON:OPTI | 17.50 | GBP | 21 | Biotechnology |