| Natco Investments Limited | Real estate | 2021 |
| Nation Food Concepts Ltd | Hospitality | 2025 |
| National Brickwork Cleaning Ltd | Administrative & support | 2025 |
| National Infrastructure Solutions Holdings Limited | Financial services | 2021 |
| National Infrastructure Solutions Ltd | Health & social care | 2018 |
| National Property Investors Ltd | Financial services | 2025 |
| Nationwide Vehicle Solutions Limited | Wholesale & retail | 2005 |
| Nativekernel Limited | Administrative & support | 2025 |
| Natural Beauty by Natalie Ltd | Other services | 2010 |
| Natures Healing Kitchen Ltd | Hospitality | 2026 |
| NCL Scaffolding Ltd | Construction | 2016 |
| NCR Architectural Design Limited | Professional & scientific | 2003 |
| NCS Ventures Limited | Real estate | 2010 |
| ND Kinver Ltd | Hospitality | 2025 |
| NDC Investments Limited | Real estate | 2023 |
| NE Door Systems Ltd | Construction | 2021 |
| Neal R Shipley & Co Limited | Construction | 2003 |
| Neatwood Innovations Limited | Manufacturing | 2025 |
| Nedali Limited | Professional & scientific | 1979 |
| Needhams Medical LLP | | 2018 |
| Neha Supermarket Limited | Hospitality | 2025 |
| Neil Knott Limited | Professional & scientific | 2016 |
| Nelfaps Investments and General Dealer Ltd | Information & communication | 2026 |
| Nellies Complex Care Ltd | Health & social care | 2025 |
| Neon EDS Ltd | Construction | 2023 |
| Nest Architects Ltd | Professional & scientific | 2021 |
| Nestifyhub Ltd | Wholesale & retail | 2024 |
| Network Executive Chauffeurs Limited | Other services | 2011 |
| Neuroheadway Ltd | Administrative & support | 2011 |
| Neurophysioplus Ltd | Health & social care | 2006 |
| New Home Flooring Limited | Wholesale & retail | 2020 |
| New Wood Community Limited | Administrative & support | 2025 |
| Newbank Construction (Halesowen) Limited | Administrative & support | 1976 |
| Neweys Crew Ltd | Construction | 2025 |
| Newlands Media Ltd | Professional & scientific | 2025 |
| Newlink Services Limited | Wholesale & retail | 2003 |
| Newlynx UK Ltd | Construction | 2018 |
| Newno Holdings Ltd | Information & communication | 2017 |
| Newteq Ltd | Professional & scientific | 2025 |
| Newton D Limited | Wholesale & retail | 2013 |
| Nexgen Security & Management Solutions (PVT) Ltd | Wholesale & retail | 2023 |
| Next GEN Haulage Ltd | Transport & logistics | 2024 |
| Nextrise Scaffold Ltd | Construction | 2026 |
| NF Resourcing Limited | Administrative & support | 2025 |
| Ngrst Consulting & Solutions Limited | Information & communication | 2026 |
| NHP Services Ltd | Administrative & support | 2024 |
| Niapr Limited | Financial services | 2023 |
| Nicholls Flooring Ltd | Construction | 2022 |
| Nick Stevens Design Limited | Professional & scientific | 2017 |
| Nicklin Capital Ltd | Real estate | 2022 |
| Nickolls & Perks Holdings Limited | Professional & scientific | 2011 |
| Nickolls Consulting Ltd | Professional & scientific | 2025 |
| Nicky Jones Beauty & Holistics Ltd | Other services | 2025 |
| Nigel Price Limited | Professional & scientific | 2016 |
| Nightingale Care Support Limited | Administrative & support | 2017 |
| Nimac Limited | Professional & scientific | 2003 |
| NINETEEN81 Ltd | Professional & scientific | 2018 |
| NIS Commercial Limited | Real estate | 2021 |
| NIS Consultancy Ltd | Professional & scientific | 2022 |
| Nitrogen Digester Ltd | Water & waste | 2025 |
| Nivlac Investments Limited | Construction | 2007 |
| Nivlac Logistics Limited | Transport & logistics | 2019 |
| NIW Consulting Ltd | Professional & scientific | 2024 |
| Nixon Properties (Hagley) Limited | Real estate | 2022 |
| NJB 76 Limited | Financial services | 2022 |
| NK MOT Centre Ltd | Wholesale & retail | 2025 |
| NL Creative Limited | Information & communication | 2020 |
| NO 3 the Old School House Ltd | Real estate | 2024 |
| NO92 Coffee Lounge Ltd | Hospitality | 2020 |
| Nomadic Developments (Bramley) Ltd | Construction | 2021 |
| Nomadic Investments Ltd | Real estate | 2021 |
| Noorab Ltd | Hospitality | 2024 |
| Nord Strength Ltd | Education | 2026 |
| Northern Dawn Consultancy Ltd | Professional & scientific | 2026 |
| Northwick Grange Care Limited | Health & social care | 2006 |
| Northwick Grange Limited | Extraterritorial | 1992 |
| Northwood Financial Consultants Limited | Financial services | 2011 |
| Norton Dental Limited | Administrative & support | 2017 |
| Norton House Properties Ltd | Real estate | 2023 |
| Norton Management Consultants Ltd | Professional & scientific | 2016 |
| Norton Tech Services Limited | Information & communication | 2014 |
| Notice ME Policies Ltd | Public administration | 2026 |
| Noven Limited | Professional & scientific | 2011 |
| Novo Web Solutions Ltd | Information & communication | 2022 |
| Novum Power Construction Limited | Professional & scientific | 2026 |
| NOW Property Investment Ltd | Real estate | 2020 |
| NPP Group Holdings Limited | Financial services | 2018 |
| NPP Joint Injections Limited | Health & social care | 2018 |
| NPP Paediatric Services Limited | Health & social care | 2018 |
| NPP Paediatrics Ltd | Health & social care | 2015 |
| NPP Psychology Limited | Health & social care | 2018 |
| NPP SLT Limited | Health & social care | 2020 |
| NS & SK Properties Ltd | Real estate | 2019 |
| NS1 Limited | Professional & scientific | 2009 |
| NSM Chemical Solutions Limited | Manufacturing | 2017 |
| NU Homes (Staffs) Ltd | Construction | 2013 |
| NU Homes Properties Ltd | Real estate | 2026 |
| Nuland Properties Ltd | Real estate | 2023 |
| Nura Limited | Health & social care | 2012 |
| Nuvo-One Aesthetics Limited | Other services | 2019 |