| N&N Capital Limited | Real estate | 2026 |
| N&R Ltd | Hospitality | 2024 |
| N&S Build Ltd | Construction | 2026 |
| N&S Paradise Properties Ltd | Real estate | 2018 |
| N1BS Ltd | Construction | 2025 |
| N4V Properties Limited | Real estate | 2024 |
| Naag Trading Limited | Administrative & support | 2010 |
| Naamahad Ltd | Real estate | 2023 |
| NAB Bradford Ltd | Real estate | 2026 |
| NAB Ealing Ltd | Construction | 2026 |
| NAB Goose Green Ltd | Construction | 2024 |
| NAB Plant Ltd | Administrative & support | 2026 |
| NAB Properties Management Ltd | Real estate | 2019 |
| Nabeel Perfumes International Limited | Wholesale & retail | 2014 |
| Nabila Bargains Ltd | Wholesale & retail | 2016 |
| Nackhurst Limited | Real estate | 1980 |
| Nada's Boutique Ltd | Wholesale & retail | 2024 |
| Nadra Jewellery Limited | Wholesale & retail | 2025 |
| Naga Maida UK Limited | Manufacturing | 2025 |
| Nagkurti's Limited | Professional & scientific | 2010 |
| Nagm Limited | Wholesale & retail | 2026 |
| Nagpal & Sons Ltd | Wholesale & retail | 2014 |
| Nagra 15 Ltd | Wholesale & retail | 2025 |
| Nagra Investments Ltd | Real estate | 2020 |
| Nail Bar Hounslow Ltd | Other services | 2026 |
| Nailed by Neha Ltd | Other services | 2025 |
| Nailounge Hounslow Ltd | Other services | 2025 |
| Nails by Suzann Ltd | Wholesale & retail | 2026 |
| Nailux Hounslow Limited | Other services | 2021 |
| Nain Carpet Limited | Wholesale & retail | 1992 |
| Nainic Limited | Information & communication | 2015 |
| Nair Consultancy Limited | Information & communication | 2025 |
| Najiya Designs Limited | Information & communication | 2024 |
| Najtaxtiles Ltd | Wholesale & retail | 2025 |
| Nana & Spices Limited | Hospitality | 2025 |
| Nanak Enterprises Limited | Construction | 2003 |
| Nanak Investors Limited | Real estate | 2025 |
| Nanak Managment Ltd | Professional & scientific | 2024 |
| Nanda Building Services Limited | Construction | 2021 |
| Nanda UK Holdings Limited | Financial services | 2021 |
| Nandinidesigns Ltd | Administrative & support | 2020 |
| Nandita Ramesh Holdings Ltd | Real estate | 2025 |
| Nangarhar Bakery Limited | Wholesale & retail | 2026 |
| Nanna's Dream Production Studios Ltd | Professional & scientific | 2025 |
| Nano Software Technology Limited | Information & communication | 2007 |
| Nanograx Ltd | Information & communication | 2025 |
| Nanox Tech Solutions Ltd | Information & communication | 2025 |
| Naqvi Global Traders Limited | Wholesale & retail | 2026 |
| Narang Empire Limited | Wholesale & retail | 2006 |
| Naranjan Properties Limited | Real estate | 2020 |
| Narayani Homes PVT Ltd | Real estate | 2024 |
| Nargis Exclusive Ltd | Real estate | 2021 |
| Narla Logistics Ltd | Transport & logistics | 2025 |
| Narula Services Ltd | Transport & logistics | 2025 |
| Nasa Tech Limited | Information & communication | 2026 |
| Nasama Ltd | Construction | 2024 |
| Naser T Ltd | Households | 2024 |
| Nashcare Limited | Health & social care | 1995 |
| Nasratu Care Limited | Health & social care | 2024 |
| Nass Fast Food Charcoal Grill Limited | Hospitality | 2023 |
| Natalia Juncker Nails Ltd | Other services | 2025 |
| Nathan Brothers Limited | Financial services | 2009 |
| Nation Investment & Development Ltd | Real estate | 2025 |
| National Algerian Centre C.I.C. | Hospitality | 2013 |
| National Auto Expert Limited | Manufacturing | 2025 |
| National Children Competition CIC | Education | 2020 |
| National House Removals Ltd | Transport & logistics | 2019 |
| Nationwide Autos Limited | Wholesale & retail | 2016 |
| Natory Limited | Other services | 2021 |
| Natraj Limited | Real estate | 2023 |
| Natural Homeopathic Clinic Limited | Health & social care | 2014 |
| Natural Revive Ltd | Wholesale & retail | 2021 |
| Natural Vital Ltd | Wholesale & retail | 2023 |
| Naturebloom Limited | Wholesale & retail | 2024 |
| Natures Living Limited | Wholesale & retail | 2019 |
| Naturopathic Health and Laser Limited | Other services | 2024 |
| NAV K 34 Limited | Transport & logistics | 2025 |
| Navajo Leasing Ltd | Administrative & support | 2011 |
| Navayah Films Ltd | Information & communication | 2026 |
| Naviora Ltd | Wholesale & retail | 2026 |
| Navjanaki Limited | Transport & logistics | 2025 |
| Navora Interiors Ltd | Wholesale & retail | 2023 |
| Navtac Ltd | Wholesale & retail | 2024 |
| Navtej Ahuja Ltd | Wholesale & retail | 2024 |
| Nawab Estates Limited | Real estate | 2023 |
| Nayu Haulage Ltd | Construction | 2025 |
| NAZ Master Limited | Wholesale & retail | 2025 |
| NAZ Trading Group Ltd | Households | 2022 |
| NAZ4 Ltd | Construction | 2026 |
| Nazaura Wellness Ltd | Health & social care | 2025 |
| Naze Corporation Ltd | Hospitality | 2021 |
| NB Tax Advice Ltd | Professional & scientific | 2023 |
| Nbali Ltd | Construction | 2025 |
| NBK Catering Services Ltd | Construction | 2025 |
| NBK Payroll Ltd | Administrative & support | 2019 |
| NBN IT Solutions Ltd | Information & communication | 2014 |
| NCS Brickwork Developments Ltd | Construction | 2024 |
| NDG Law Ltd | Professional & scientific | 2017 |
| Ndra Ltd | Construction | 2023 |
| NE Tech Services Ltd | Public administration | 2024 |