| MW Hydraulic Services Ltd | Manufacturing | 2019 |
| MW Plumbing (Norwich) Ltd | Construction | 2026 |
| MW Surfacing Limited | Construction | 2003 |
| MW Sweeper Hire Ltd | Administrative & support | 2019 |
| MX-5 Owners Club | Other services | 1998 |
| My Bear Shop Limited | Extraterritorial | 2018 |
| My Cariad Limited | Wholesale & retail | 2020 |
| My Claim Solutions Ltd | Professional & scientific | 2021 |
| My DNA Health Ltd. | Health & social care | 2014 |
| My DNA Holdings Ltd | Professional & scientific | 2014 |
| My Ecommerce Accountant Limited | Extraterritorial | 2020 |
| My Epic Adventure Ltd | Information & communication | 2021 |
| My Kitchen Fitter Limited | Construction | 2026 |
| My Kitchens Nottingham Ltd | Manufacturing | 2023 |
| My Learning Jigsaw Limited | Education | 1998 |
| My Lion Property Limited | Real estate | 2026 |
| My New Move Ltd | Information & communication | 2019 |
| My PAL Group Ltd | Other services | 2026 |
| My Security and Hardware Ltd | Wholesale & retail | 2016 |
| My Sofa Covers Ltd | Manufacturing | 2014 |
| My Style Diary Ltd | Wholesale & retail | 2025 |
| My Vault Limited | Administrative & support | 2019 |
| My Virtual Admin Limited | Administrative & support | 2017 |
| Myacre Community Eco-Developments Ltd | Construction | 2021 |
| MYC Transport Limited | Transport & logistics | 2016 |
| Mycelia HQ Ltd | Information & communication | 2025 |
| Mycodisiacs Limited | Extraterritorial | 2024 |
| Mycotec Limited | Manufacturing | 1999 |
| Myhaven Ltd | Real estate | 2018 |
| Mykeyholder.Com Ltd | Other services | 2007 |
| Myob Digital Limited | Other services | 2017 |
| Myowerx Ltd | Other services | 2019 |
| Myparcelbox Ltd | Manufacturing | 2026 |
| Myriad UK Limited | Wholesale & retail | 2008 |
| Myrtle Manor Ltd | Real estate | 2017 |
| Mysteriouso Ltd | Wholesale & retail | 2025 |
| Mystical Realms by Zena Limited | Wholesale & retail | 2026 |
| Mystique Investments Limited | Real estate | 2020 |
| Mytlo Homes Ltd | Real estate | 2022 |
| MZ Trading Ltd | Wholesale & retail | 2012 |
| Mzee Business Advisory Limited | Professional & scientific | 2023 |
| N & B Mortgages Limited | Financial services | 2003 |
| N & D Property Limited | Hospitality | 2014 |
| N & MW Pandora's Box Limited | Other services | 2020 |
| N & N Windows and Conservatories Ltd | Construction | 2024 |
| N & R Autos Ltd | Wholesale & retail | 2014 |
| N & R Property Holdings Ltd | Construction | 2024 |
| N & S Plastering Limited | Construction | 1991 |
| N C H Dunn Limited | Financial services | 2015 |
| N C Hunt Carpentry Services Ltd | Construction | 2015 |
| N D Specialists Limited | Health & social care | 2010 |
| N E Engineering Holdings Ltd | Manufacturing | 2021 |
| N E Engineering Ltd | Manufacturing | 2009 |
| N E Smith Ltd | Wholesale & retail | 2003 |
| N Eichorn Consulting Limited | Professional & scientific | 2016 |
| N G Bell Contractors Limited | Construction | 2013 |
| N G Jones Services Ltd | Transport & logistics | 2013 |
| N J Hazell (Building Services) Ltd | Construction | 2005 |
| N J Hodge Limited | Financial services | 2021 |
| N J Smart & Co (UK) Limited | Other services | 2009 |
| N J Smart & Co. Limited | Information & communication | 1994 |
| N Mace Plastering Ltd | Construction | 2026 |
| N Marshall Ceramics Limited | Administrative & support | 2016 |
| N N Caravans Ltd | Wholesale & retail | 2024 |
| N R Asphalt Employment Services Ltd | Administrative & support | 2010 |
| N R Asphalt Ltd | Construction | 2009 |
| N R Surfacing Ltd | Administrative & support | 2010 |
| N Richardson Ltd | Manufacturing | 2011 |
| N S & V Homes Ltd | Real estate | 2016 |
| N T W Civil Engineers Limited | Construction | 2003 |
| N&A Cars 4 U Limited | Wholesale & retail | 2016 |
| N&C Babbage Limited | Arts & recreation | 2011 |
| N&D Auto Limited | Wholesale & retail | 2024 |
| N&D Property Groups Limited | Real estate | 2026 |
| N&E Crocker Ltd | Manufacturing | 2016 |
| N&F Property Ltd | Hospitality | 2021 |
| N&G Electrical Contractors Limited | Construction | 2015 |
| N&G Heating Ltd | Construction | 2017 |
| N&H Group Ltd | Wholesale & retail | 2022 |
| N&J Consulting Ltd | Professional & scientific | 2026 |
| N&K Construction NW Limited | Construction | 2018 |
| N&R Fitness Company Ltd | Arts & recreation | 2022 |
| N&Slb Ltd | Information & communication | 2020 |
| N-Clubs CIC | Wholesale & retail | 2025 |
| N-Sight Advisory Services Ltd | Professional & scientific | 2020 |
| N-Star Enterprises Limited | Education | 2022 |
| N.M. Kett Builders Limited | Construction | 2026 |
| N.M. Lucas (P.R.) Limited | Professional & scientific | 2007 |
| N.M.G. (Services) Limited | Professional & scientific | 1985 |
| N.P.Tennis Coaching Ltd | Arts & recreation | 2015 |
| N.T.C. Holdings Limited | Real estate | 1981 |
| N20 Trading Limited | Wholesale & retail | 2020 |
| N5 FNL Tax Services Ltd | Professional & scientific | 2025 |
| N92 Holdings Ltd | Financial services | 2024 |
| Nabiitopia Ltd | Wholesale & retail | 2025 |
| Nabil & Makwan Ltd | Real estate | 2023 |
| Nabil Barber Ltd | Other services | 2022 |
| Nabmed Limited | Health & social care | 2018 |
| Nabtec Limited | Information & communication | 2022 |
| NAC Industries Ltd | Real estate | 2024 |