| M a Halford Ltd | Manufacturing | 2014 |
| M a Mobiles Ltd | Wholesale & retail | 2026 |
| M a S Star Investment Limited | Real estate | 2013 |
| M a Sharpe Limited | Other services | 2012 |
| M a Supermarket Ltd | Wholesale & retail | 2025 |
| M a Y Ashra Ltd | Health & social care | 2022 |
| M Al-Akaidi Ltd | Health & social care | 2025 |
| M and a Stores Leicester Ltd | Wholesale & retail | 2025 |
| M and M Hair Ltd | Other services | 2013 |
| M and M Hairstyle Ltd | Other services | 2025 |
| M Atkar Ltd | Wholesale & retail | 2023 |
| M Avvai Limited | Real estate | 2022 |
| M Baker Consultancy Ltd | Professional & scientific | 2023 |
| M Baxter Energy Ltd | Construction | 2023 |
| M Belcher Building Services Limited | Construction | 2010 |
| M Burlacu Beauty Ltd | Other services | 2025 |
| M by RIF Ltd | Wholesale & retail | 2026 |
| M C a Group Limited | Hospitality | 2020 |
| M C Trustees (Administration) Limited | Administrative & support | 1989 |
| M C Trustees (Pensions) Limited | Administrative & support | 2005 |
| M C Trustees Limited | Professional & scientific | 2007 |
| M Car Hire Ltd | Wholesale & retail | 2023 |
| M Cars (Leicester) Ltd | Wholesale & retail | 2006 |
| M Cars Ltd | Wholesale & retail | 2025 |
| M Chohan Ltd | Transport & logistics | 2019 |
| M Cubed Limited | Professional & scientific | 1993 |
| M D Interior Designs Limited | Hospitality | 2018 |
| M D S Sudan Ltd | Financial services | 2026 |
| M D Touring Ltd | Arts & recreation | 2023 |
| M DEV Properties Ltd | Real estate | 2026 |
| M Duale Ltd | Health & social care | 2024 |
| M E S Contracts (Leicester) Limited | Construction | 1995 |
| M E Stamp Limited | Other services | 2011 |
| M Electrical Ltd | Construction | 2021 |
| M F Property Ltd | Real estate | 2026 |
| M G Lewis Carpentry Limited | Construction | 2018 |
| M G S Consultancy Limited | Other services | 2003 |
| M H Radiology Ltd | Health & social care | 2025 |
| M H Trims Limited | Wholesale & retail | 2003 |
| M Hackett Properties Limited | Real estate | 2026 |
| M Herbert Limited | Real estate | 2024 |
| M Hyman Coaching Limited | Health & social care | 2024 |
| M I Clean Energy Ltd | Construction | 2023 |
| M I M Optics Limited | Health & social care | 2013 |
| M I Recruitment Limited | Administrative & support | 2022 |
| M J & SON Skip Hire Ltd | Water & waste | 2025 |
| M J Electronics Limited | Manufacturing | 2002 |
| M J Gibson Haulage Limited | Transport & logistics | 2018 |
| M J Jabbar Ltd | Health & social care | 2021 |
| M J P Hospitality Limited | Hospitality | 2018 |
| M J Products Ltd | Manufacturing | 2009 |
| M J Services (LEI) Ltd | Water & waste | 2025 |
| M J Skip & Plant Hire Limited | Transport & logistics | 2005 |
| M J Warner Windows & Conservatories Limited | Construction | 2006 |
| M K Plumbing & Heating Ltd | Construction | 2007 |
| M K Waraich Limited | Professional & scientific | 2016 |
| M Laffey Holdings Limited | Professional & scientific | 2009 |
| M Leonard Electrical Ltd | Construction | 2022 |
| M M S UK Trading Co Ltd | Manufacturing | 2024 |
| M M Sons Ltd | Other services | 2020 |
| M M Valeting (Leic) Ltd | Other services | 2018 |
| M Marketing Ltd | Wholesale & retail | 2022 |
| M Mead Limited | Other services | 2004 |
| M N Commercials Ltd | Wholesale & retail | 2003 |
| M N M Leicester Ltd | Manufacturing | 2023 |
| M N N General Trading Ltd | Wholesale & retail | 2025 |
| M Naveeds Ltd | Wholesale & retail | 2025 |
| M Offcuts Limited | Professional & scientific | 2024 |
| M P Chicken Ltd | Hospitality | 2025 |
| M P Hinchliffe Joinery Limited | Other services | 2019 |
| M Pacheco Ltd | Wholesale & retail | 2022 |
| M Patel Locum Ltd | Health & social care | 2023 |
| M Powles (Finance) Limited | Financial services | 2016 |
| M Property Site Services UK Ltd | Administrative & support | 2026 |
| M R B Transport Solutions Limited | Transport & logistics | 2018 |
| M R Chand 1 Limited | Wholesale & retail | 2025 |
| M R Fearn Ltd | Construction | 2022 |
| M Reed Golf Ltd | Wholesale & retail | 2023 |
| M S Conveyor UK Ltd | Manufacturing | 2026 |
| M S Deol Investments Limited | Real estate | 2015 |
| M S Mussa Consultancy Ltd | Professional & scientific | 2023 |
| M Scott & Brown Limited | Administrative & support | 2014 |
| M Sharp Property Ltd | Real estate | 2021 |
| M Squared Pharma Ltd | Wholesale & retail | 2021 |
| M Stone Music Limited | Manufacturing | 2017 |
| M Supplies Ltd | Wholesale & retail | 2026 |
| M T Holdings (Leicester) Limited | Professional & scientific | 2013 |
| M Tech Projects Limited | Administrative & support | 2008 |
| M V Constructions and Carpentry Limited | Professional & scientific | 2021 |
| M V Mortgage Solutions Limited | Financial services | 2015 |
| M Vata Ltd | Construction | 2025 |
| M Video Art Ltd | Administrative & support | 2019 |
| M W Lift Services Limited | Manufacturing | 2013 |
| M W Vehicle Contracts Ltd | Wholesale & retail | 2003 |
| M Walker Brickwork Ltd | Construction | 2025 |
| M Waraich Ltd | Health & social care | 2018 |
| M&A Carrier Ltd | Transport & logistics | 2025 |
| M&A Developments Leicester Limited | Real estate | 2016 |
| M&A Hybrid 2026 Ltd | Real estate | 2026 |
| M&A Hybrid Solutions Ltd | Real estate | 2022 |