| Nineteen Forty SIX Ltd | Real estate | 2026 |
| NINETYFOUR19 Ltd | Information & communication | 2020 |
| Ningetare Ltd | Transport & logistics | 2025 |
| Ninic Plumbing Limited | Construction | 2025 |
| Ninja Academy UK Limited | Arts & recreation | 2024 |
| Ninja Events Limited | Professional & scientific | 2021 |
| Ninja Fit CIC | Health & social care | 2023 |
| Nino Productions Ltd | Information & communication | 2025 |
| Ninos Group Ltd | Wholesale & retail | 2026 |
| Nipd Ltd | Transport & logistics | 2025 |
| Nirf Ltd | Hospitality | 2015 |
| Niro Events Limited | Wholesale & retail | 2026 |
| Nirvana Transfers Ltd | Transport & logistics | 2025 |
| Nirvanae Tech Group Limited | Information & communication | 2025 |
| Nisa Health Consultancy Ltd | Health & social care | 2023 |
| Nisha's Italian Hub Ltd | Hospitality | 2025 |
| Nishki Ltd | Wholesale & retail | 2025 |
| Nisi Optimum Ltd | Professional & scientific | 2017 |
| Nithush Limited | Wholesale & retail | 2023 |
| Nitnem Properties Limited | Real estate | 2012 |
| Nivec Electrical Ltd | Construction | 2006 |
| Nivoraa Enterprises Ltd | Wholesale & retail | 2026 |
| Nivya Ltd | Real estate | 2024 |
| NIXCO7 Ltd | Wholesale & retail | 2025 |
| Niya Holdings Limited | Financial services | 2018 |
| NIZ Electrical Ltd | Construction | 2023 |
| NJ Natural Alignment Limited | Health & social care | 2025 |
| NJ Phone Vape Limited | Other services | 2025 |
| NJ Utility Consultants Ltd | Professional & scientific | 2023 |
| NJ Williams Ltd | Information & communication | 2002 |
| NJC Accommodation Ltd | Hospitality | 2020 |
| NJC Thermal Covers (Global) Limited | Manufacturing | 2020 |
| NJF Civil Engineering and Construction Ltd | Construction | 2024 |
| NJH Distribution Ltd | Wholesale & retail | 2026 |
| NJH Executive Search Ltd | Administrative & support | 2025 |
| NJK Property Limited | Real estate | 2023 |
| NJM Construction (NW) Ltd | Construction | 2015 |
| NJM Orthopaedics Limited | Health & social care | 2026 |
| NJN Controls Limited | Construction | 2004 |
| NJR Accounting Services Limited | Professional & scientific | 2022 |
| NJR Infrastructure Solutions Ltd | Administrative & support | 2018 |
| Njxl Ltd. | Professional & scientific | 2015 |
| NJY Consultancy Services Limited | Administrative & support | 2025 |
| NK (Global) Consulting Limited | Professional & scientific | 2022 |
| NK Car Sales (NW) Ltd | Wholesale & retail | 2018 |
| NK Deli Ltd | Hospitality | 2019 |
| NK Private Holdings Ltd | Financial services | 2023 |
| NKA Property Management Ltd | Real estate | 2025 |
| NKB Test Services Ltd | Professional & scientific | 2023 |
| NKC Estates LLP | | 2019 |
| NKC Investment Ltd | Health & social care | 2024 |
| Nkcos Limited | Financial services | 2026 |
| NKD Rathnam Red Pandas Ltd | Wholesale & retail | 2023 |
| Nkiruka Iheke Ltd | Health & social care | 2025 |
| Nkrt Holdings Ltd | Financial services | 2026 |
| NL Property Limited | Real estate | 2018 |
| NLB Accommodation Ltd | Real estate | 2022 |
| NLB Education & Consultancy Ltd | Professional & scientific | 2024 |
| NLF Security Limited | Public administration | 2025 |
| Nlkb Brickwork & Construction Ltd | Construction | 2019 |
| NLP Contracting Limited | Construction | 2018 |
| NLP Home Services Ltd | Households | 2019 |
| NLP Training Limited | Professional & scientific | 2016 |
| NLR Distribution Ltd. | Wholesale & retail | 2022 |
| Nlri Ltd | Transport & logistics | 2022 |
| NLS Administration Services Limited | Financial services | 2019 |
| NLS Management Ltd | Hospitality | 2016 |
| NLV Services Ltd | Construction | 2019 |
| NM Aesthetics and Medical Supplies Ltd | Wholesale & retail | 2025 |
| NM Elite Security Limited | Administrative & support | 2025 |
| NM Properties (Knowsley) Limited | Real estate | 2008 |
| NM Waste Management Limited | Water & waste | 2025 |
| Nm&A Holdings Limited | Real estate | 2016 |
| NMA Media Ltd | Information & communication | 2019 |
| NMC Building Services Design Limited | Professional & scientific | 2011 |
| NMD Financial Services Ltd. | Education | 2016 |
| Nmhl Realisations Limited | Professional & scientific | 2009 |
| NML Brazilian Food Ltd | Wholesale & retail | 2024 |
| NML Foundation | Arts & recreation | 2012 |
| NML Trading Limited | Wholesale & retail | 1992 |
| NMR Developments Limited | Construction | 2018 |
| Nmul Realisations Limited | Manufacturing | 2008 |
| NMV Management Company Limited | Real estate | 2019 |
| Nmwk Limited | Wholesale & retail | 2025 |
| NN Liverpool Ltd | Hospitality | 2018 |
| NN Properties (NW) Limited | Real estate | 2024 |
| NNC Express Logistics Ltd | Transport & logistics | 2026 |
| NNG Commerce Limited | Wholesale & retail | 2025 |
| NNG Engineering Limited | Professional & scientific | 2022 |
| NNL Property Management Ltd | Other services | 2019 |
| NNW Catering Ltd | Hospitality | 2018 |
| NO Pressure Productions Ltd | Administrative & support | 2017 |
| NO 14 the Flower Shop Limited | Wholesale & retail | 2018 |
| NO 25 Ltd | Professional & scientific | 2024 |
| NO Anchovies Music Ltd | Information & communication | 2025 |
| NO BAD Vibes Ltd | Education | 2022 |
| NO Fuzz Given Limited | Other services | 2025 |
| NO Limits Amateur Boxing C.I.C. | Arts & recreation | 2021 |
| NO Limits Sports Management Ltd | Arts & recreation | 2022 |
| NO Mind Ltd | Wholesale & retail | 2018 |