| Musson Invest Ltd | Real estate | 2018 |
| Musson&Sons Painting and Decorating Ltd | Construction | 2024 |
| MV Candles Ltd | Manufacturing | 2024 |
| MV Maher Ltd | Manufacturing | 2025 |
| MW Truck Ltd | Construction | 2016 |
| MWB Associates Limited | Financial services | 2012 |
| Mwendaz Limited | Administrative & support | 2016 |
| Mxsstx Ltd | Wholesale & retail | 2024 |
| My Chef Booking Hospitality Ltd | Hospitality | 2019 |
| My Invest Limited | Real estate | 2025 |
| My Print Shack Ltd | Manufacturing | 2020 |
| My Property Portal.Com Limited | Extraterritorial | 1998 |
| My UK Enterprises Ltd. | Transport & logistics | 2014 |
| Myella Brands Ltd | Wholesale & retail | 2016 |
| Mylocloud Limited | Information & communication | 2018 |
| Mysale Group Trustee Limited | Administrative & support | 2016 |
| Myscenti Ltd | Wholesale & retail | 2024 |
| Mystery Night Ltd | Manufacturing | 2023 |
| Mytecgroup (Midland) Ltd | Extraterritorial | 2021 |
| Mytecgroup Ltd | Administrative & support | 2015 |
| Mz's Enterprises Ltd | Transport & logistics | 2021 |
| N Dhillon Aesthetics Ltd | Health & social care | 2020 |
| N F N Developments Limited | Construction | 2007 |
| N Mann Accountants Limited | Professional & scientific | 2009 |
| N&G Property Group Ltd | Real estate | 2020 |
| N-Tec Mobility Holdings Limited | Financial services | 2024 |
| N-Tec Mobility Limited | Wholesale & retail | 2011 |
| N.N.Artisan World Ltd | Manufacturing | 2019 |
| N50 Trade Centre Limited | Wholesale & retail | 2021 |
| NAB Scotts Limited | Financial services | 2020 |
| Nabs Property Ltd | Real estate | 2023 |
| Nadra Properties Ltd | Real estate | 2024 |
| Nadurra Limited | Wholesale & retail | 2011 |
| Nakap Plus Ltd | Other services | 2017 |
| Nanny VIP Recruitment Ltd | Public administration | 2022 |
| Napit Certification Limited | Professional & scientific | 2006 |
| Napit Holdings Limited | Professional & scientific | 2013 |
| Napit Inspection Limited | Professional & scientific | 2005 |
| Napit Registration Limited | Other services | 2004 |
| Napit Services Limited | Administrative & support | 2005 |
| Napit Training Limited | Education | 2004 |
| Napit Training Services Limited | Education | 2005 |
| Nargi Global Services Limited | Information & communication | 2017 |
| Nargi Property Services Ltd | Real estate | 2021 |
| Narus Technologies Ltd | Professional & scientific | 2020 |
| Nashe Private Limited | Health & social care | 2025 |
| Nasheana Ltd | Manufacturing | 2024 |
| Nasko SAX Ltd | Arts & recreation | 2024 |
| Natalie Cars Ltd | Wholesale & retail | 2024 |
| Nation Floors Limited | Construction | 2025 |
| National Association of Professional Inspectors and Testers Limited | Other services | 2006 |
| National Beauty Training Limited | Education | 2019 |
| National Brokk Hire Ltd | Administrative & support | 2025 |
| National Hire Ltd | Administrative & support | 2025 |
| National Trailer and Towing Association Limited | Other services | 1980 |
| National Vintage Tractor & Engine Club Ltd | Other services | 2025 |
| Nationwide Transport Solutions (2024) Limited | Transport & logistics | 2024 |
| Nave Investments Limited | Real estate | 2016 |
| Naverian Limited | Professional & scientific | 2007 |
| Navrad Properties Ltd | Real estate | 2025 |
| Navya Diagnostic Imaging Ltd | Health & social care | 2025 |
| Nazran Stores Limited | Wholesale & retail | 2010 |
| NB Logistics Group Ltd | Transport & logistics | 2026 |
| NC Civils Ltd | Administrative & support | 2017 |
| NC Window Services Ltd | Construction | 2024 |
| Ncars Travel Services Ltd | Transport & logistics | 2025 |
| NDC Properties Investment Ltd | Real estate | 2025 |
| NDH (Macclesfield) Ltd | Administrative & support | 2021 |
| Ndidi Osisi Galaxy Ltd | Health & social care | 2019 |
| NE Props Limited | Manufacturing | 2012 |
| Nean Ltd | Wholesale & retail | 2026 |
| Nectagon Health Care Limited | Health & social care | 2025 |
| Need to Insure Limited | Financial services | 2002 |
| Neet Accountancy Ltd | Professional & scientific | 2021 |
| Neil Harrod Auto Electrical Services Limited | Wholesale & retail | 2005 |
| Neil Harrod Ltd | Wholesale & retail | 2002 |
| Nelson Projects Limited | Construction | 2024 |
| Nelson Site Services Ltd | Construction | 2025 |
| Nemesis International Group Ltd | Wholesale & retail | 2024 |
| NEO Padel Gainsborough Ltd | Arts & recreation | 2026 |
| NEO Padel Ltd | Financial services | 2026 |
| NEO Padel Sheffield Ltd | Arts & recreation | 2026 |
| Neologix Ltd | Transport & logistics | 2025 |
| Nero Contracts Limited | Construction | 2024 |
| Nest Lettings Limited | Households | 2019 |
| Nestteck Ltd | Professional & scientific | 2016 |
| Netforte Group Limited | Information & communication | 2016 |
| Netforte Limited | Information & communication | 2003 |
| Neurodiversity With James Limited | Health & social care | 2024 |
| Nevica IP Limited | Extraterritorial | 2009 |
| Neville Rail Projects Limited | Manufacturing | 1985 |
| New Beginnings Bookkeeping Ltd | Professional & scientific | 2020 |
| New Beginnings Hypnotherapy & Mind Coaching Limited | Health & social care | 2022 |
| New Bill Properties Ltd | Real estate | 2016 |
| New Brook Management Company Limited | Households | 2007 |
| New Dorian Lodge Management Company Ltd. | Households | 1996 |
| New Frontier Developments Limited | Construction | 2013 |
| New Garden (Mansfield Nott's) Ltd | Hospitality | 2025 |
| New Garden (Mansfield) Limited | Hospitality | 2018 |
| New Home Partnerships Ltd | Construction | 2023 |