| Nembus Ltd | Financial services | 2021 |
| Neobiz Technologies Limited | Manufacturing | 2008 |
| Neon Tiger Events Limited | Administrative & support | 2025 |
| Neopet Ltd | Health & social care | 2023 |
| Neos Associates Ltd. | Professional & scientific | 2011 |
| Neply Ltd | Real estate | 2025 |
| Nero Factory Ltd | Financial services | 2022 |
| Neskar Finance Ltd | Professional & scientific | 2025 |
| Nessa UDY Ltd | Wholesale & retail | 2020 |
| Nestology Limited | Households | 2026 |
| Nevik Limited | Wholesale & retail | 2017 |
| New Acres Caravans Limited | Hospitality | 2025 |
| New Build & Construction Ltd | Construction | 2020 |
| New Demipower Limited | Professional & scientific | 2002 |
| New Eco Sources Ltd | Construction | 2025 |
| New ERA Brickwork Ltd | Construction | 2023 |
| New ERA Gold and Beauty Ltd | Other services | 2024 |
| New Generation Logistics Ltd | Transport & logistics | 2022 |
| New Keld Limited | Professional & scientific | 2002 |
| New Land Chemical Co., Ltd | Administrative & support | 2019 |
| New Leaf Therapies Ltd | Health & social care | 2022 |
| New Masala Limited | Hospitality | 2012 |
| New Street Property Developments Ltd | Real estate | 2022 |
| New View Tree & Garden Services Ltd | Agriculture & fishing | 2025 |
| Newever Housing Ltd | Real estate | 2021 |
| Nexcept Ltd | Information & communication | 2026 |
| Nexora Commerce Ltd | Wholesale & retail | 2025 |
| Nexphase IQ Ltd | Professional & scientific | 2025 |
| Nexpress Delivery Limited | Wholesale & retail | 2025 |
| Next Chapter Audio Ltd | Information & communication | 2019 |
| Next Flight OUT (UK) Ltd | Extraterritorial | 2013 |
| Next Level Nutrition & Fitness Limited | Arts & recreation | 2013 |
| Nexus Heating Ltd. | Construction | 2021 |
| Nexus Hub (Notts) Limited | Real estate | 2025 |
| NG Imaging Limited | Professional & scientific | 2013 |
| NGF Strength & Conditioning Ltd | Arts & recreation | 2023 |
| NGH Corp Ltd | Information & communication | 2020 |
| NHA Investments Ltd | Real estate | 2023 |
| Niall Edworthy Limited | Arts & recreation | 2003 |
| Nice Sleep Limited | Wholesale & retail | 2025 |
| Nice Work (London) Ltd | Professional & scientific | 2021 |
| Niche Builders Ltd | Construction | 2017 |
| Niche Cosmetics Limited | Wholesale & retail | 2022 |
| Nicholas Rail Limited | Construction | 2014 |
| Nicom IT Limited | Information & communication | 2017 |
| Nightstream Limited | Wholesale & retail | 2018 |
| Nikthi Ltd | Real estate | 2024 |
| Nimnik Limited | Wholesale & retail | 2015 |
| Ninety Minds Ltd | Wholesale & retail | 2018 |
| Ninety Nine Commerce Ltd | Wholesale & retail | 2020 |
| Ningbo Core Lighting Co., Ltd | Extraterritorial | 2024 |
| Ningbo Fedee Commodity Co., Ltd. | Extraterritorial | 2018 |
| Ningbo Haitian IMP. & EXP. Co., Ltd. | Extraterritorial | 2014 |
| Ningbo Horizon Leisure Product Co., Ltd. | Administrative & support | 2020 |
| Ningbo Huicheng Imp&Exp Co., Ltd | Wholesale & retail | 2022 |
| Ningbo Kingland Industry Co., Ltd | Extraterritorial | 2021 |
| Ningbo LY Industry Co., Limited | Wholesale & retail | 2020 |
| Ningbo Mile Precision Machinery Co., Ltd | Extraterritorial | 2014 |
| Ningbo Shark Plastic and Metal Product Co., Ltd | Wholesale & retail | 2023 |
| Ningbo Shengda Labels Co., Ltd | Extraterritorial | 2024 |
| Ningbo Sunny Co., Ltd | Wholesale & retail | 2024 |
| Ningbo Weitu Industrial & Trading Co., Ltd | Extraterritorial | 2014 |
| Ningbo Yinzhou Lubao Metal Products Co., Ltd | Extraterritorial | 2015 |
| Ningbo Youngsun Arts & Crafts Co., Ltd. | Extraterritorial | 2017 |
| Ningyang Globalbas Co., Ltd | Wholesale & retail | 2023 |
| Nirvasa Ltd | Wholesale & retail | 2025 |
| Nisa Stores (London) Limited | Wholesale & retail | 2004 |
| Nisnim Ltd | Real estate | 2026 |
| Nitz Services Ltd | Professional & scientific | 2022 |
| Nixie Limited | Administrative & support | 2015 |
| Niyazi Consulting Limited | Information & communication | 2025 |
| Nizpro Limited | Professional & scientific | 2024 |
| NJ Healthcare Services Limited | Administrative & support | 2019 |
| NMA Recovery Ltd | Professional & scientific | 2023 |
| NMB Brothers Ltd | Real estate | 2021 |
| NMB Property Management Ltd | Real estate | 2025 |
| Nmysm Properties Ltd | Real estate | 2023 |
| NN Beauty Zone Ltd | Other services | 2015 |
| NNT Retail Limited | Wholesale & retail | 2016 |
| NO 1 Kirn Road (West Ealing) Management Company Limited | Households | 1993 |
| NO More Damp London Ltd | Construction | 2018 |
| NO One Stuff Ltd | Arts & recreation | 2022 |
| NO Sweat Garments Limited | Wholesale & retail | 2014 |
| NO. 1 Battersea Square Property Company Limited | Administrative & support | 2006 |
| NOA Developments Ltd | Construction | 2024 |
| Noa's Delights Ltd | Hospitality | 2024 |
| Noble DPF Services Limited | Wholesale & retail | 2022 |
| Noble Future Land Investment Ltd | Financial services | 2020 |
| Nobleriver Ltd | Wholesale & retail | 2025 |
| Noblewood Properties Limited | Construction | 2006 |
| Nohlah Ltd | Wholesale & retail | 2022 |
| Nomos Limited | Arts & recreation | 1988 |
| Noot Noot Limited | Wholesale & retail | 2026 |
| Norfolk Designer Garden Ltd | Administrative & support | 2020 |
| Norlee Limited | Extraterritorial | 2008 |
| North Coffee I Ltd | Hospitality | 2024 |
| Northbank Property Ltd | Real estate | 2022 |
| Northdown Management Company Ltd | Households | 2013 |
| Northern Corner Ltd | Information & communication | 2019 |
| Northern Management Ltd | Hospitality | 2018 |