| My Product Studio Limited | Professional & scientific | 2019 |
| My Radiator Hub Ltd | Wholesale & retail | 2025 |
| My Tutor Circle CIC | Education | 2026 |
| Mycolarity Ltd | Information & communication | 2025 |
| Myers Holdings Limited | Real estate | 2019 |
| Myers Landscape Construction Ltd | Administrative & support | 2019 |
| Myfoto School Photography Ltd | Arts & recreation | 2019 |
| MYG Investments Limited | Construction | 2017 |
| Myhandyvan Limited | Transport & logistics | 2023 |
| Mylo Communications Ltd | Professional & scientific | 2017 |
| Mystery Boxd Limited | Wholesale & retail | 2023 |
| Mystery Darts Ltd | Wholesale & retail | 2025 |
| MZ Connects Limited | Administrative & support | 2025 |
| N & a Riley Farms Ltd. | Extraterritorial | 2012 |
| N & B Engineering Limited | Manufacturing | 2002 |
| N & J Homes Chorley LLP | | 2012 |
| N Donald Design Services Ltd | Professional & scientific | 2014 |
| N H & G Howarth Ltd | Wholesale & retail | 2020 |
| N Parry Therapy Limited | Health & social care | 2026 |
| N S B Developments Limited | Construction | 2008 |
| N Spiers Limited | Administrative & support | 2014 |
| N T J Builders Limited | Administrative & support | 2010 |
| N Turner Welding Consultancy Ltd | Professional & scientific | 2023 |
| N&G Art Properties Ltd | Real estate | 2025 |
| N&N Clothing Ltd | Wholesale & retail | 2026 |
| N.W.S.M. Solutions Ltd | Professional & scientific | 2025 |
| Nabwood Ltd | Information & communication | 2020 |
| Nadara Glow Ltd | Health & social care | 2026 |
| NAG Group Ltd | Hospitality | 2023 |
| Naga Chilli Limited | Hospitality | 2011 |
| Naked Walls Limited | Professional & scientific | 2021 |
| Nama Nama Ltd | Hospitality | 2021 |
| Nana Jaans Ltd | Hospitality | 2026 |
| Nana Jan’S Buckshaw Village Ltd | Hospitality | 2023 |
| Napa (Manchester) Limited | Other services | 2011 |
| NARIN2019 Ltd | Hospitality | 2020 |
| Nascent Consulting Limited | Professional & scientific | 2008 |
| Nasib Ltd | Hospitality | 2023 |
| Nasir Industries Ltd | Health & social care | 2024 |
| Nata Delicious Moments Cardiff Ltd | Wholesale & retail | 2021 |
| Nata Delicious Moments Wholesale Ltd | Hospitality | 2021 |
| Natalie Waldron Design Limited | Professional & scientific | 2017 |
| Natasha Mila Jewellery Limited | Wholesale & retail | 2023 |
| National Couriers Limited | Transport & logistics | 2018 |
| National Horse Transport Limited | Transport & logistics | 2025 |
| National Racking Services Limited | Professional & scientific | 2020 |
| Nationwide Curtain Wall Limited | Manufacturing | 2025 |
| Nationwide Estate Agents Limited | Real estate | 2007 |
| Nationwide Leisure Limited | Arts & recreation | 1997 |
| Nationwide Lettings Limited | Real estate | 2008 |
| Nationwide Safety and Training Ltd | Professional & scientific | 2010 |
| Nationwide Sealants (NW) Limited | Construction | 2018 |
| Natural Landscaping Limited | Administrative & support | 2021 |
| Natural Stone Landscapes Limited | Construction | 2006 |
| Naturally Afro Ltd | Manufacturing | 2021 |
| Naturally Oak Flooring Limited | Construction | 2015 |
| Natures Best (Ashton) Ltd | Wholesale & retail | 2015 |
| Naughton Electrical Contracting Company Limited | Manufacturing | 2001 |
| Navrongo Projects Limited | Wholesale & retail | 2012 |
| Navrongo Projects Two Limited | Real estate | 2018 |
| Navucate Ltd | Information & communication | 2026 |
| Nazli Catering Limited | Other services | 2019 |
| Naztech DS Limited | Administrative & support | 2013 |
| NBD Lettings Limited | Real estate | 2025 |
| NC 24/7 Health Care Ltd | Administrative & support | 2023 |
| NCC (Movement Joint Systems) Limited | Wholesale & retail | 2017 |
| NCC (Streetscape) Limited | Wholesale & retail | 2007 |
| NCC Scotland Limited | Construction | 2007 |
| NDD Demolition & Groundworks Ltd | Construction | 2018 |
| NDL Reinforcements Ltd | Manufacturing | 2018 |
| NDS Enterprises Limited | Financial services | 2020 |
| Neary Cleaning Services Limited | Extraterritorial | 2013 |
| Neary Group Limited | Extraterritorial | 2013 |
| Neatham Limited | Agriculture & fishing | 2018 |
| Neave Utilities Ltd | Construction | 2011 |
| Nebula Technical Ltd | Professional & scientific | 2023 |
| Needhams Contracts Limited | Construction | 2003 |
| Neil Bell Ltd | Construction | 2013 |
| Neil Carroll Transport Limited | Transport & logistics | 2009 |
| Neil Woosey Consulting Limited | Professional & scientific | 2019 |
| Nel!Pots Ltd | Administrative & support | 2019 |
| Nelson and Park Sheetmetal Limited | Manufacturing | 2002 |
| Nelson Property (NW) Ltd. | Real estate | 2018 |
| Nemaura Pharma Limited | Professional & scientific | 2005 |
| Neon Motor Company Ltd | Wholesale & retail | 2015 |
| Neon Onion Ltd | Information & communication | 2023 |
| Neptunebeeremporium Limited | Hospitality | 2022 |
| Nerdle Ltd | Information & communication | 2016 |
| Nest Building Solutions Ltd | Construction | 2016 |
| NEST.9 Ltd | Real estate | 2019 |
| NEST9 Homes Ltd | Real estate | 2023 |
| Nestorium Limited | Wholesale & retail | 2024 |
| NET Zero Clubs Ltd | Construction | 2024 |
| NET Zero Labs Limited | Professional & scientific | 2017 |
| Netcentrix Limited | Information & communication | 1995 |
| Network EYE Group Ltd | Extraterritorial | 2015 |
| Network EYE Ltd | Administrative & support | 2015 |
| Network Northwest Limited | Information & communication | 2022 |
| Network Support Ltd | Information & communication | 2015 |
| Neuraleap Solutions Ltd | Information & communication | 2024 |