| Nextenergy III Co-Invest LP | | 2021 |
| Nextgenx Ltd | Information & communication | 2025 |
| Nextimport UK Limited | Wholesale & retail | 2003 |
| Nextpower III UK Holdco II Ltd | Financial services | 2021 |
| Nextpower III UK Holdco Ltd | Financial services | 2020 |
| Nextpower UK 1 (Dissolved) LP | | 2020 |
| Nextpower UK 2 (Dissolved) LP | | 2020 |
| Nextpower V Co-Invest Holdco Limited | Financial services | 2025 |
| Nexus Build Ltd | Construction | 2019 |
| Nexus Estate Holdings Ltd | Households | 2025 |
| Nexus Independent Financial Advisers Limited | Financial services | 2007 |
| Nexus Investment Managers Limited | Financial services | 2013 |
| Nexus Pharma Consulting Ltd | Professional & scientific | 2026 |
| NG Nursing Services Ltd | Health & social care | 2023 |
| Nhaj Ltd | Transport & logistics | 2018 |
| NHD Developments Ltd | Construction | 2022 |
| NHH Property Limited | Real estate | 2022 |
| NIC Day Property Maintenance Limited | Construction | 2018 |
| Nice Box Ltd | Construction | 2026 |
| Nice Network Ltd | Information & communication | 1993 |
| Niche Coffee Limited | Manufacturing | 2013 |
| Nicholson Design Consultants Ltd | Professional & scientific | 1999 |
| Nick Hancock Design Studio Limited | Professional & scientific | 2023 |
| Niclau Limited | Real estate | 2020 |
| Nico Projects Limited | Real estate | 2024 |
| Nicola Smith Communications Limited | Professional & scientific | 2014 |
| Nicole Porter Limited | Professional & scientific | 2015 |
| Nika Capital Ltd | Real estate | 2025 |
| Nilavara Ltd | Wholesale & retail | 2021 |
| Nina Schuster Ltd | Professional & scientific | 2019 |
| Nine Street Properties Ltd | Construction | 2021 |
| Nineteen Point Two Limited | Information & communication | 2024 |
| NINETY8 Media Ltd | Information & communication | 2026 |
| Ninkee Limited | Manufacturing | 2014 |
| Nirvana Recovery Ltd | Health & social care | 2023 |
| Niva Retails Ltd | Wholesale & retail | 2020 |
| Njam Njamb ENT Limited | Arts & recreation | 2023 |
| NJB Building Solutions Limited | Construction | 2014 |
| NJB Maintenance Limited | Manufacturing | 2026 |
| NJH Property Group Ltd | Real estate | 2024 |
| NJS Auto Emporium Ltd | Wholesale & retail | 2019 |
| NJS Property Group Ltd | Professional & scientific | 2022 |
| NJT Services Hampshire Ltd | Other services | 2019 |
| Nlighten Publishing Limited | Information & communication | 2026 |
| Nliten Limited | Information & communication | 2026 |
| NLP Financial Management Limited | Financial services | 2001 |
| Nlrx Services Limited | Wholesale & retail | 2009 |
| NNP (Propco) Limited | Construction | 2022 |
| NO 5 Station Road Park Gate Management Company Limited | Real estate | 1995 |
| NO Studio in Particular Limited | Manufacturing | 2017 |
| NO. 7 Contact Lens Laboratory Limited | Manufacturing | 1980 |
| NO. 74 Ltd | Real estate | 2021 |
| NO.74 Consultancy Ltd | Professional & scientific | 2021 |
| NO.74 Holdings Group Ltd | Financial services | 2022 |
| NO1 Farringdon (London) General Partner Limited | Financial services | 2021 |
| NO1 Farringdon (London) Limited Partnership | | 2021 |
| NO1 Farringdon (London) Subco 1 Limited | Financial services | 2021 |
| NO1 Farringdon (London) Subco 2 Limited | Financial services | 2021 |
| Noble Business Solutions Limited | Information & communication | 2014 |
| Noble Financial Consulting Limited | Professional & scientific | 2020 |
| Noble Foundations Property Ltd | Extraterritorial | 2025 |
| Nocera Ltd | Hospitality | 2026 |
| Nodera Care Limited | Health & social care | 2024 |
| Nodera Healthcare Limited | Health & social care | 2026 |
| Nolan Brown Limited | Professional & scientific | 2014 |
| Nolan Davis Contracting Limited | Construction | 2000 |
| Nolan Williams Limited | Professional & scientific | 2004 |
| Nolan. Build Ltd | Construction | 2023 |
| Noman's Business Ltd | Information & communication | 2024 |
| NON Surgical Aesthetics by Luciano Pereira Ltd | Other services | 2023 |
| Nonus Holding Limited | Financial services | 2025 |
| Nonus Limited | Professional & scientific | 2018 |
| Noor International Ltd | Real estate | 2026 |
| Nopen Kutt Ltd | Construction | 2007 |
| Noras DE Alphaville Ltd | Professional & scientific | 2025 |
| Nord Star Boats UK Limited | Manufacturing | 2023 |
| Nordic Power Boats Limited | Manufacturing | 2024 |
| Norfolk Newmedica Limited | Health & social care | 2019 |
| Normandy Court Management Association Limited | Households | 1989 |
| Normans Heating Limited | Construction | 2005 |
| Normanton Specsavers Limited | Wholesale & retail | 1999 |
| Normcyber Limited | Information & communication | 2013 |
| Norris Green Specsavers Hearcare Limited | Wholesale & retail | 2013 |
| Norris Green Specsavers Limited | Wholesale & retail | 1990 |
| Norris Green Visionplus Limited | Wholesale & retail | 1993 |
| Norse Bear Studios Ltd | Arts & recreation | 2023 |
| North Derbyshire Newmedica Limited | Health & social care | 2018 |
| North East Hampshire Chamber of Commerce Limited | Administrative & support | 1996 |
| North East London Domi Audiology Specsavers Limited | Wholesale & retail | 2026 |
| North East NMH Ltd | Education | 2024 |
| North Finchley Specsavers Hearcare Limited | Wholesale & retail | 2022 |
| North Finchley Specsavers Limited | Wholesale & retail | 2005 |
| North Finchley Visionplus Limited | Wholesale & retail | 2005 |
| North Hampshire Chamber of Commerce and Industry | Other services | 1998 |
| North Lancashire Domiciliary Specsavers Limited | Wholesale & retail | 2025 |
| North Meets West Property Ltd | Real estate | 2022 |
| North Shields Specsavers Limited | Wholesale & retail | 2002 |
| North Walsham Specsavers Hearcare Limited | Wholesale & retail | 2022 |
| North Walsham Specsavers Limited | Wholesale & retail | 2017 |
| North West London Domi Audiology Specsavers Limited | Wholesale & retail | 2024 |