| NJ One Limited | Information & communication | 2007 |
| NJB Electrical Ltd | Construction | 2021 |
| Njenga Logistics Limited | Transport & logistics | 2016 |
| NJJ Care Home Limited | Health & social care | 2013 |
| NJJ Investments Ltd | Education | 2019 |
| NJM Trading Limited | Hospitality | 2025 |
| Njord Energy Limited | Professional & scientific | 2011 |
| NJP Sourcrs Ltd | Administrative & support | 2024 |
| NJS Estates Limited | Real estate | 2016 |
| NJS Property Portfolio Limited | Real estate | 2018 |
| NJS Windows Limited | Construction | 2021 |
| Njuk Consulting Limited | Information & communication | 2024 |
| NK Foundation Ltd | Health & social care | 2022 |
| NK LIS Limited | Financial services | 2024 |
| NK Property Investment and Management Ltd | Real estate | 2018 |
| NKG (UK) Consultants Limited | Administrative & support | 2016 |
| Nkhay Ltd | Health & social care | 2023 |
| Nkrabea Limited | Wholesale & retail | 2023 |
| Nkrabea Services Ltd | Health & social care | 2017 |
| NKS Asian Supermarket Ltd | Wholesale & retail | 2026 |
| NKS Realty Ltd | Real estate | 2024 |
| NL Apex Properties Ltd | Real estate | 2025 |
| NL Bowman Ltd | Professional & scientific | 2019 |
| NL Consultants Limited | Information & communication | 2015 |
| NL Machine Tool Consulting Limited | Wholesale & retail | 2012 |
| Nlcg Limited | Construction | 2018 |
| Nlogic Ltd. | Wholesale & retail | 2009 |
| NLS Clinical Services Limited | Health & social care | 2012 |
| Nlvd Solutions Ltd | Administrative & support | 2025 |
| NM Domains Limited | Extraterritorial | 2017 |
| Nmalik & Co Limited | Professional & scientific | 2019 |
| NMC Music Productions Limited | Information & communication | 2023 |
| NMJ Solutions Limited | Transport & logistics | 2016 |
| NMRS2P Holdings Ltd | Professional & scientific | 2022 |
| Nmrsp Props Ltd | Real estate | 2018 |
| NMT 93 Ltd | Transport & logistics | 2019 |
| NMT Developments Ltd | Construction | 2020 |
| NN Global Ventures Limited | Wholesale & retail | 2025 |
| NNC Properties Ltd | Real estate | 2022 |
| NNR Healthcare Limited | Health & social care | 2022 |
| NO 25 Properties Limited | Real estate | 2020 |
| NO Chill Entertainment Limited | Arts & recreation | 2024 |
| NO Composure Events Ltd | Administrative & support | 2026 |
| NO Half Measures PUB Company Limited | Hospitality | 2016 |
| NO Pressure Entertainment Ltd | Information & communication | 2023 |
| NO Regrets Limited | Extraterritorial | 2015 |
| NO Two Same Studios C.I.C. | Education | 2025 |
| NO. 1 Barbers Limited | Other services | 2006 |
| NO. 1 Brooklands Square Limited | Hospitality | 2024 |
| NO.1 Barbers CW Limited | Other services | 2023 |
| NO.12 Solutions Ltd | Professional & scientific | 2013 |
| NO.59 Beauty Aesthetic Limited | Other services | 2025 |
| NO.8 Caffe Ltd | Hospitality | 2023 |
| NOA Recruitment Limited | Administrative & support | 2017 |
| Nobech Tech Ltd | Wholesale & retail | 2020 |
| Nobel Rise Global Co Ltd | Wholesale & retail | 2025 |
| Nobexa Property Management Ltd | Real estate | 2026 |
| Nobility Estates Limited | Financial services | 2026 |
| Noble Housing Investments Ltd | Real estate | 2026 |
| Noble Housing Partners Ltd | Real estate | 2023 |
| Noble Reach Holdings Limited | Financial services | 2024 |
| Noble Recliners Limited | Wholesale & retail | 2023 |
| Noble U.K. Limited | Transport & logistics | 2013 |
| Nobody Trains Alone Ltd | Health & social care | 2020 |
| Nochi Limited | Hospitality | 2021 |
| Nochillautos Ltd | Wholesale & retail | 2026 |
| Nochillbrand Ltd | Wholesale & retail | 2025 |
| Noco Mcgimpsey Properties Ltd | Real estate | 2021 |
| Nocollide Ltd | Other services | 2024 |
| Nodia Properties (TH) Limited | Construction | 2017 |
| Nodia Properties LM Limited | Real estate | 2019 |
| Nodia Properties LM2 Limited | Real estate | 2025 |
| Nodix Ltd | Professional & scientific | 2026 |
| Noel and Aarons Flooring Ltd | Construction | 2025 |
| NOI Gibraltar Limited | Extraterritorial | 2021 |
| NOI London Limited | Professional & scientific | 2008 |
| Noiryn Beauty Ltd | Other services | 2026 |
| Noise Atelier Ltd | Other services | 2026 |
| Noise Distribution Ltd | Information & communication | 2026 |
| Noise Holdings Ltd | Financial services | 2026 |
| Noise OS Ltd | Information & communication | 2026 |
| Noise Publishing Ltd | Information & communication | 2026 |
| Nojofitness Limited | Arts & recreation | 2025 |
| Nolan Tully Laptop Computers Ltd | Wholesale & retail | 2025 |
| Nomad Publications Limited | Information & communication | 2025 |
| Nomadic Communications Ltd | Information & communication | 2025 |
| Nomadic Publishing Limited | Information & communication | 2021 |
| Nomadpaw Ltd | Wholesale & retail | 2022 |
| Nomiyo Ltd | Health & social care | 2012 |
| Nomplan Limited | Health & social care | 2012 |
| Nonna's Events Ltd | Hospitality | 2026 |
| Nonso Concept Limited | Wholesale & retail | 2026 |
| Noobii Ltd | Hospitality | 2024 |
| Noodle Live Limited | Information & communication | 2012 |
| Noodleboxx Limited | Information & communication | 2026 |
| Noon Trading Ltd | Wholesale & retail | 2022 |
| Noor & Ayan Ltd | Wholesale & retail | 2020 |
| Noor 786 Holdings Ltd | Financial services | 2025 |
| Noor E Bahar Trading Limited | Wholesale & retail | 2024 |
| Noor Enterprise (MK) Limited | Transport & logistics | 2015 |