| Norbury H F Ltd | Education | 2019 |
| Norbury Property Services (London) Limited | Real estate | 1999 |
| Norbury Property Services Limited | Real estate | 2014 |
| Nord & Barne Ltd | Wholesale & retail | 2022 |
| Nord Bakehouse Ltd | Wholesale & retail | 2025 |
| Nordik Group Ltd | Transport & logistics | 2020 |
| Nordpro Limited | Professional & scientific | 2017 |
| Norfolk Court Management Company Limited | Households | 1971 |
| Norfolk House Management Company Limited | Households | 2021 |
| Norfolk Plaza Management Limited | Hospitality | 1995 |
| Norland Square Mansions Residents' Association Limited | Households | 1976 |
| Norman Ackroyd Limited | Arts & recreation | 2002 |
| Normanton Mews Management Company Limited | Households | 1995 |
| Normanton Road Management Company Limited | Households | 2001 |
| Normed UK Ltd | Health & social care | 2014 |
| Norsouth Properties Limited | Real estate | 1967 |
| North (Merton) Management Company Limited | Real estate | 1986 |
| North and South Multiservice Ltd | Administrative & support | 2022 |
| North Bridge Associates Limited | Information & communication | 2026 |
| North Downs Cleaning & Maintenance Limited | Administrative & support | 2004 |
| North Ember Consulting Ltd | Professional & scientific | 2026 |
| North END News Limited | Wholesale & retail | 2013 |
| North South Store Limited | Wholesale & retail | 2019 |
| North Tower Residents Management Limited | Households | 2000 |
| North West Vehicle Solutions 23 Ltd | Other services | 2023 |
| Northampton Road Freehold Limited | Households | 2019 |
| Northcote Road 1967 Limited | Extraterritorial | 2014 |
| Northeast Block Ltd | Real estate | 2024 |
| Northend Properties Limited | Real estate | 2000 |
| Northgate (Northwood) Management Company Limited | Households | 2010 |
| Northgate Basildon Ltd | Real estate | 2017 |
| Northgate House LLP | | 2016 |
| Northgate News Crawley Ltd | Wholesale & retail | 2016 |
| Northolt Golf Club Limited | Hospitality | 1996 |
| Northop Park Management Company Limited | Households | 2011 |
| Northstar Partners Ltd | Transport & logistics | 2024 |
| Northstar UK Investments Ltd | Financial services | 2020 |
| Northumberland Place Residents Association Limited | Households | 1998 |
| Northwood Apartments Ltd | Real estate | 2023 |
| Northwood Croydon Ltd | Real estate | 2018 |
| Northwood Green Management Company Limited | Households | 1992 |
| Norway ARK Life Sciences Limited | Administrative & support | 2023 |
| Norway Yami Biotechnology Co., Ltd | Manufacturing | 2025 |
| Norwegin Braut Biotech Ltd | Administrative & support | 2024 |
| Norwood Associates LLP | | 2023 |
| Norwood Compressors Limited | Construction | 1971 |
| Norwood Flats Management Company Limited | Real estate | 2004 |
| Norwood Green Investments Ltd | Real estate | 2020 |
| Norwood Investments (LH) Limited | Real estate | 2024 |
| Norwood Investments Limited | Real estate | 1960 |
| Norwood Land Limited | Real estate | 2020 |
| Norwood Wharf Kingsbridge Road Southall Residents Association Limited | Households | 1995 |
| Nostra Consulting Limited | Information & communication | 2007 |
| Nostromus Ltd | Transport & logistics | 2021 |
| NOT AS Fast Ltd | Arts & recreation | 2023 |
| NOT Beyond ME | Administrative & support | 2019 |
| Notapay UK Ltd | Information & communication | 2023 |
| Notebook Films Limited | Administrative & support | 2015 |
| Notemunch Ltd | Professional & scientific | 2013 |
| Notr Holding Ltd | Financial services | 2024 |
| Notrexon Ltd | Information & communication | 2023 |
| Noumena Research Ventures Ltd. | Professional & scientific | 2011 |
| Nour BBQ HUT Ltd | Hospitality | 2018 |
| Nova Contracting (UK) Ltd | Construction | 2014 |
| Nova Driving School Ltd | Education | 2025 |
| Nova House Management Company Limited | Households | 2017 |
| Nova Neuron Ltd | Information & communication | 2025 |
| Nova Pharmacy Ltd | Wholesale & retail | 2025 |
| Nova Property Limited | Real estate | 2021 |
| Nova Spark Tech Limited | Manufacturing | 2025 |
| NOVA2 Ladies Salon Ltd | Other services | 2026 |
| Novafloor Carpets Ltd | Wholesale & retail | 2018 |
| Novafrica Limited | Wholesale & retail | 2020 |
| Novaiq Limited | Information & communication | 2026 |
| Novalnet Ltd | Financial services | 2022 |
| Novapilot Ltd | Wholesale & retail | 2025 |
| Novapixel Web Studio Limited | Information & communication | 2025 |
| Novaprime EK Ltd | Wholesale & retail | 2024 |
| Novaprint LAB Ltd | Manufacturing | 2025 |
| Novarli Limited | Extraterritorial | 2021 |
| Novative Ltd | Information & communication | 2021 |
| Novatok Ltd | Professional & scientific | 2024 |
| Novavision Media Limited | Arts & recreation | 2025 |
| Novavoeux Limited | Professional & scientific | 2025 |
| Novawise Ltd | Information & communication | 2025 |
| Novembell Ltd | Hospitality | 2025 |
| Novida Investments Limited | Real estate | 1999 |
| Novo Designs Limited | Arts & recreation | 1999 |
| Novo Healthcare Limited | Health & social care | 2020 |
| Novryo Ltd | Administrative & support | 2025 |
| Novyra Tech Ltd | Information & communication | 2025 |
| Nowpharma Limited | Information & communication | 2006 |
| Noyaxi Ltd | Transport & logistics | 2025 |
| Noypi's Lumpia Ltd | Hospitality | 2026 |
| Noysh Tech Ltd | Information & communication | 2026 |
| Noysh Ventures Ltd | Wholesale & retail | 2026 |
| NPG NW Ltd | Construction | 2023 |
| NPG SL Ltd | Hospitality | 2023 |
| NPT Holdings Limited | Financial services | 2016 |
| NR Cafe Ltd | Hospitality | 2024 |