| Nationwide Homestays Limited | Hospitality | 2023 |
| Natural Resourcing Ltd | Administrative & support | 2024 |
| Nature's Magic Ltd | Wholesale & retail | 2021 |
| Navara Browbar (Wellingborough) Ltd | Other services | 2016 |
| Navicosoft Ltd | Information & communication | 2021 |
| NBH Home Care Limited | Health & social care | 2023 |
| NCB Investments Limited | Real estate | 2024 |
| NCR Automotive Ltd | Extraterritorial | 2022 |
| Need Deep Clean Ltd | Administrative & support | 2023 |
| Neelkant Food Ltd | Wholesale & retail | 2023 |
| Neema Ndungu Ltd | Health & social care | 2019 |
| NEG 54 Solutions Ltd | Construction | 2021 |
| Negotium Systemata Ltd | Information & communication | 2025 |
| Nehiloth Properties Ltd | Hospitality | 2024 |
| Neil Matthews Engineering Limited | Manufacturing | 2005 |
| Neldum Constructions Ltd | Construction | 2025 |
| Nelion Care Services Limited | Health & social care | 2019 |
| Nelrose Eagles Limited | Health & social care | 2013 |
| Nels Care Ltd | Health & social care | 2022 |
| Nelson Motor Yachts Ltd | Manufacturing | 2021 |
| Nelson Tailored Travel Ltd | Administrative & support | 2020 |
| Nelzario Ltd | Education | 2025 |
| NEN Services Ltd | Administrative & support | 2023 |
| Nene Business Support Ltd | Real estate | 2024 |
| Nene Court Approved Caravan Services Ltd | Wholesale & retail | 2013 |
| Nene Court Holdings Limited | Financial services | 2012 |
| Nene Cruises Limited | Transport & logistics | 2023 |
| Nene Education Trust | Education | 2011 |
| Nene Medical Services Limited | Health & social care | 2003 |
| Nene Training Ltd | Arts & recreation | 2020 |
| Nene Vale Motor Company Limited | Wholesale & retail | 2009 |
| Nene Vale Properties Ltd | Real estate | 2025 |
| Nene Valley Cars Ltd | Wholesale & retail | 2024 |
| Nene Valley Soap and Honey Ltd | Manufacturing | 2025 |
| Nene Valley Transportation Ltd | Transport & logistics | 2024 |
| Nenehaven Garden Buildings Ltd | Manufacturing | 2026 |
| Nenny Distribution Ltd | Transport & logistics | 2024 |
| Nettlebush Tyres Ltd | Wholesale & retail | 2023 |
| Neuvantage Business Services Limited | Professional & scientific | 2025 |
| Nev's Grab Hire Limited | Water & waste | 2016 |
| Nevelyn Healthcare Ltd | Health & social care | 2023 |
| Nevitec Ltd | Manufacturing | 2011 |
| New Creation Realities Church | Other services | 2020 |
| New Health Media Ltd | Professional & scientific | 2025 |
| New Street (Earls Barton) Management Company Ltd | Households | 2025 |
| Newgen IT Services Limited | Information & communication | 2013 |
| Newgen IT Solutions and Services Limited | Information & communication | 2023 |
| Newlands Spice Bar Limited | Hospitality | 2025 |
| Newline Utilities Ltd | Construction | 2018 |
| Newman & Co (Animal Nutrition) Ltd | Wholesale & retail | 2025 |
| Newmans Holdings (Kettering) Limited | Real estate | 1929 |
| Newrose Consultancy Limited | Information & communication | 2017 |
| Newsham Drive Management Limited | Administrative & support | 2014 |
| Nexlink Transport Ltd | Transport & logistics | 2024 |
| Nextgen Design & Build Ltd | Construction | 2019 |
| Nexware Technology Ltd | Extraterritorial | 2023 |
| NEZ and Arda Ltd | Hospitality | 2024 |
| NG Detailing Ltd | Wholesale & retail | 2026 |
| Nicholas Logistics Ltd | Transport & logistics | 2015 |
| Night Bite Ltd | Hospitality | 2018 |
| Nikkahmee Ltd | Information & communication | 2024 |
| Nikojan Ltd | Transport & logistics | 2018 |
| Nilam Property Holdings Ltd | Real estate | 2026 |
| Nilas Services Limited | Transport & logistics | 2020 |
| Nill Limited | Transport & logistics | 2022 |
| Nimlok Limited | Manufacturing | 2010 |
| Nine Arch Marine Solutions Limited | Construction | 2024 |
| Nitor Accountancy Services Ltd | Information & communication | 2019 |
| NJ Planning Services Ltd | Construction | 2015 |
| NJH Property Services Ltd | Administrative & support | 2020 |
| NJH Siting Limited | Extraterritorial | 2008 |
| NJT Transport Solutions Limited | Transport & logistics | 2006 |
| NKC Invests Ltd | Real estate | 2024 |
| NKK Ltd | Administrative & support | 2025 |
| NKW Design Ltd | Professional & scientific | 2017 |
| NL K9 Ltd | Administrative & support | 2025 |
| NLR Rising Phoenix Tattoo Limited | Other services | 2019 |
| NM Legal Limited | Professional & scientific | 2022 |
| NN8 Cabs Ltd | Transport & logistics | 2021 |
| NNE Homes Ltd | Real estate | 2020 |
| NNS Developments Limited | Construction | 2011 |
| NO Security Recordings Ltd | Information & communication | 2022 |
| Noble Associates Ltd | Professional & scientific | 2023 |
| Nocturnus Group Ltd | Construction | 2025 |
| Noima Loop Ltd | Wholesale & retail | 2022 |
| Nomanzi Limited | Health & social care | 2015 |
| Noome Limited | Manufacturing | 2019 |
| Norde Suspensions Limited | Extraterritorial | 1946 |
| Nordic Laboratories Ltd | Wholesale & retail | 2019 |
| Norindica Limited | Extraterritorial | 2017 |
| Norlmc Ltd | Health & social care | 2022 |
| Normandy Computer Services Limited | Information & communication | 1994 |
| Normz Estates Limited | Real estate | 2026 |
| Normz Plumbing Ltd | Construction | 2017 |
| Norscon Limited | Information & communication | 2014 |
| Norse Electrical Limited | Construction | 2018 |
| Norsecurity Ltd | Administrative & support | 2020 |
| Norsve Limited | Information & communication | 2023 |
| North ALE Ltd | Transport & logistics | 2019 |
| North Care 24 Limited | Health & social care | 2023 |