| Neza Valeting Centre Ltd | Administrative & support | 2016 |
| NF Electrical Services Limited | Energy | 2018 |
| NF Therapy Limited | Health & social care | 2023 |
| NF291 Ltd | Real estate | 2025 |
| Nfor Beauty Ltd | Other services | 2026 |
| NG Energy Group Limited | Professional & scientific | 2026 |
| NG GAS Services Limited | Construction | 2020 |
| NGB Ventures Limited | Health & social care | 2015 |
| Niba Marketing Limited | Information & communication | 2016 |
| Nice Catering Ltd | Hospitality | 2019 |
| Nice Decor Ltd | Manufacturing | 2024 |
| Nice One Building Services Ltd | Construction | 2013 |
| Niche Floors Ltd | Wholesale & retail | 2017 |
| Nicomede Ltd | Professional & scientific | 2018 |
| Nicu Diaries Ltd | Manufacturing | 2025 |
| Nicy Ltd | Information & communication | 2025 |
| Nidamalik Ltd | Health & social care | 2019 |
| Nieola Ltd | Transport & logistics | 2017 |
| Nigam ML Limited | Professional & scientific | 2023 |
| Nijjar Truckers Limited | Transport & logistics | 2021 |
| NIK Auto Services Ltd | Wholesale & retail | 2026 |
| Nika&Stefi Services Ltd | Transport & logistics | 2019 |
| Nikara Group Ltd | Financial services | 2023 |
| Nikas Ventures Limited | Construction | 2026 |
| Nikos Greek Solvaki Limited | Hospitality | 2025 |
| Nile Travel Limited | Transport & logistics | 2005 |
| Nilofar Nutrition Ltd | Health & social care | 2019 |
| NIM NAM Ltd | Wholesale & retail | 2024 |
| Nima Perks Limited | Wholesale & retail | 2025 |
| Nimi Creations Limited | Wholesale & retail | 2025 |
| NIN Enterprise Ltd | Wholesale & retail | 2017 |
| Ninthu Management Property Ltd | Real estate | 2021 |
| Nirali Entertainment UK Limited | Information & communication | 2026 |
| Niris Properties Limited | Wholesale & retail | 2019 |
| Nirmal Supermarket Limited | Wholesale & retail | 2022 |
| Nirmont Ltd | Transport & logistics | 2026 |
| Nisar Properties Limited | Real estate | 2022 |
| Nisarga Homes PVT Ltd | Real estate | 2025 |
| Nish Info Systems Ltd | Information & communication | 2015 |
| Nishant Brar Ltd | Real estate | 2024 |
| Nishdan Properties Limited | Real estate | 2026 |
| Nisk Infocon UK Limited | Information & communication | 2023 |
| Nitss Limited | Information & communication | 2011 |
| Nitty Data Systems Ltd | Information & communication | 2009 |
| Nitya Infotech Ltd | Information & communication | 2016 |
| Niyti Limited | Health & social care | 2025 |
| NIZ Goemkar Ltd | Administrative & support | 2025 |
| NJ Civil Ltd | Real estate | 2026 |
| NJK Holdings Ltd | Real estate | 2023 |
| NJR at Services Limited | Professional & scientific | 2021 |
| NK General Trader Limited | Wholesale & retail | 2024 |
| NK UK Properties Limited | Real estate | 2024 |
| NKS Events Entertainment Ltd | Administrative & support | 2026 |
| NMG Design & Build Limited | Construction | 2023 |
| Nmpr Ltd | Real estate | 2019 |
| NMS Exchange Ltd | Financial services | 2019 |
| NMZ Ltd | Construction | 2024 |
| NN Freight Ltd | Transport & logistics | 2015 |
| NNI Logistic Ltd | Transport & logistics | 2021 |
| NO CRY NO Guilt Ltd | Wholesale & retail | 2025 |
| NO. 30 Bulstrode Road Management Company Limited | Households | 1982 |
| NO1 Private Hire Limited | Other services | 2017 |
| NO5 Nail Bar Ltd | Other services | 2025 |
| Noahs Holdings Ltd | Financial services | 2025 |
| Noah’S ISA Limited | Wholesale & retail | 2025 |
| Nobels Property Ltd | Real estate | 2021 |
| Nobes Retail Ltd | Wholesale & retail | 2026 |
| Noble Guards Ltd | Administrative & support | 2023 |
| Noble Property Developers Ltd | Real estate | 2024 |
| Nodefolk Ltd | Information & communication | 2024 |
| Nofez Ltd | Health & social care | 2012 |
| Nofil Limited | Wholesale & retail | 2021 |
| Noha Property's Ltd | Real estate | 2025 |
| Noir Haven Ltd | Manufacturing | 2026 |
| Nokola Samson Trading Limited | Other services | 2017 |
| Nolan Home Solutions Ltd | Construction | 2025 |
| Nomad Development Initiative Ltd | Education | 2020 |
| Nomadic Ecom Ltd | Wholesale & retail | 2025 |
| Noor Hair and Beauty Ltd | Other services | 2024 |
| Noor Halal Meat and Grocery Limited | Hospitality | 2011 |
| Noor London Ltd | Professional & scientific | 2019 |
| Noor Samand Ltd | Wholesale & retail | 2025 |
| Noor Travel London Ltd | Administrative & support | 2024 |
| Nordic Security Ltd | Administrative & support | 2023 |
| Nordische Technologies UK Ltd | Wholesale & retail | 2016 |
| Norman International & Co Ltd | Manufacturing | 2014 |
| Norrkonge Trading & Construction Ltd | Other services | 2019 |
| Norson’S Solutions Provider UK Ltd | Wholesale & retail | 2018 |
| Northern Manpower Services Limited | Administrative & support | 2025 |
| Northpole Local Ltd | Wholesale & retail | 2026 |
| Northwest Commodities Ltd | Wholesale & retail | 2016 |
| Northwest Globals UK Ltd | Wholesale & retail | 2013 |
| Nortons Local Limited | Wholesale & retail | 2015 |
| Nosh - E - JAN Ltd | Hospitality | 2024 |
| Noshe Ltd | Hospitality | 2026 |
| Nosnibor Limited | Construction | 2019 |
| NOT a Business Ltd | Financial services | 2023 |
| Nour Group Ltd | Wholesale & retail | 2024 |
| Nova Books Ltd | Education | 2025 |
| Nova Maison Ltd | Households | 2026 |