| Mason Building Services Ltd | Construction | 2015 |
| Matthews Codecraft Ltd | Education | 2025 |
| Matthews Engineering Training Limited | Professional & scientific | 2018 |
| Maximum Media Limited | Information & communication | 2025 |
| Maximus HV Ltd | Manufacturing | 2026 |
| Mayne Events Limited | Arts & recreation | 2007 |
| MBD Services (Staffs) Ltd | Agriculture & fishing | 2023 |
| Mccarron Commercial Consultants Ltd | Professional & scientific | 2020 |
| Mcgills Property Solutions Ltd | Real estate | 2019 |
| Mcgowan Partnership LP | | 2012 |
| Mcintyre PUB Management Limited | Hospitality | 2015 |
| MD Welding & Fabrications Ltd | Professional & scientific | 2025 |
| Meachen and Bevan (Uttoxeter) Limited | Construction | 2003 |
| Medcharter Limited | Transport & logistics | 2010 |
| MEE Accountancy Services Ltd | Professional & scientific | 2013 |
| Meetree Finance Solutions Ltd | Professional & scientific | 2011 |
| Megan Nicholas Sonography Ltd | Health & social care | 2026 |
| Melon Partners Limited | Professional & scientific | 2025 |
| Mercian Estates Limited | Real estate | 2025 |
| Mews Cottages Limited | Households | 2012 |
| MGS Business Transformation Limited | Professional & scientific | 2025 |
| Micallef Estates Ltd | Real estate | 2020 |
| Michael Johnson Tree Surgery Ltd | Agriculture & fishing | 2013 |
| Mick Lovatt Haulage Limited | Transport & logistics | 2012 |
| Midland Livestock Limited | Wholesale & retail | 2006 |
| Mieland Limited | Real estate | 1981 |
| Mighty Construction Ltd | Construction | 2024 |
| Mills Refrigeration and Commissioning Services Limited | Manufacturing | 2007 |
| Mineral Assist Limited | Professional & scientific | 2022 |
| Mint Cocktail Company Ltd | Hospitality | 2025 |
| Miriad Quest Leisure Limited | Wholesale & retail | 1998 |
| Mitch Repairs Ltd | Construction | 2023 |
| MJ Lunn & Sons Limited | Real estate | 2010 |
| MJB Couriers Limited | Transport & logistics | 2004 |
| MJB Fencing Limited | Agriculture & fishing | 2019 |
| MJB Property Ltd | Real estate | 2019 |
| MJC Technology Ltd | Construction | 2017 |
| Momentum Opticals Limited | Construction | 2022 |
| Monte Productions Ltd | Professional & scientific | 2024 |
| Mood Live Ltd | Professional & scientific | 2026 |
| MOR Haulage Ltd | Transport & logistics | 2025 |
| More Kudos Limited | Professional & scientific | 2025 |
| Morgan Magness Limited | Wholesale & retail | 2014 |
| Mortimers Transport Limited | Wholesale & retail | 2020 |
| MOT Express Limited | Wholesale & retail | 2011 |
| Motley CRU Limited | Information & communication | 2023 |
| Moza Uttoxeter Ltd | Hospitality | 2026 |
| Mrdb Holdings Limited | Administrative & support | 2008 |
| MRG Project Services Ltd | Professional & scientific | 2005 |
| MSV Consultancy Ltd | Information & communication | 2013 |
| MSV Holdco Limited | Financial services | 2026 |
| Mulberry Gardens (Uttoxeter) Limited | Hospitality | 2015 |
| MWC Clothing Ltd | Wholesale & retail | 2023 |
| MWC Ltd | Other services | 2018 |
| Myrth Limited | Wholesale & retail | 2025 |
| N & J Smith Limited | Construction | 2017 |
| N Harries Consulting Ltd | Professional & scientific | 2019 |
| N J Boulton Contractors Limited | Construction | 2013 |
| N Sowter Agricontractors Ltd | Agriculture & fishing | 2023 |
| Nabb Lane Woods Ltd | Hospitality | 2019 |
| Netherfield Management Company (Staffs) Ltd | Real estate | 2020 |
| Newfield Green Enterprises Ltd | Real estate | 2022 |
| Newfield Haulage Limited | Transport & logistics | 2015 |
| NFP Resource Ltd | Professional & scientific | 2013 |
| Nick O'Regan Plant Services Limited | Construction | 2015 |
| Nidavellir Services Ltd | Construction | 2026 |
| Night Inn Group Ltd | Hospitality | 2020 |
| Nine Fields Farm Ltd | Agriculture & fishing | 2014 |
| NJ Veterinary Limited | Professional & scientific | 2018 |
| NON League Football Shop Limited | Wholesale & retail | 2021 |
| Nori Productions Ltd | Hospitality | 2026 |
| Nuevo Products Ltd | Extraterritorial | 2022 |
| Nuprovit Limited | Agriculture & fishing | 2024 |
| NVM Construction Ltd | Construction | 2008 |
| NWT Electrical Limited | Energy | 2016 |
| Oak Tree Advisory Limited | Professional & scientific | 2019 |
| Oaklands Grove Management Company Limited | Households | 2019 |
| Offley Grove Farm Activities Ltd | Other services | 2010 |
| Old Potting Shed Ltd | Wholesale & retail | 2017 |
| Old School Construction Limited | Construction | 2012 |
| Olivia Deià Consultancy Limited | Wholesale & retail | 2023 |
| Omnia HV and Rail Ltd | Manufacturing | 1999 |
| ONLINE24UK Ltd | Wholesale & retail | 2018 |
| Opulence Beauty Limited | Other services | 2010 |
| Orecor Ltd | Information & communication | 2018 |
| Osteopilates Limited | Health & social care | 2003 |
| Oxford Kitting and Carting Limited | Health & social care | 2025 |
| P Coates Building & Maintenance Ltd | Construction | 2013 |
| P Langley Limited | Professional & scientific | 2017 |
| P Slaney Limited | Agriculture & fishing | 2010 |
| P&Lr Properties Ltd | Real estate | 2022 |
| Palec Pioneers Limited | Real estate | 2024 |
| Parkgate Inns Limited | Hospitality | 2019 |
| Parrilla Uttoxeter Limited | Hospitality | 2021 |
| Paskett Public Relations Limited | Professional & scientific | 1995 |
| PAT Hodson Builders Limited | Construction | 2011 |
| Pat's Tree and Garden Services Limited | Administrative & support | 2020 |
| Paul Riddel Skips Limited | Water & waste | 2003 |
| Pawpalsco Ltd | Manufacturing | 2024 |
| PB Grabloaders Ltd | Transport & logistics | 2019 |