| Lymm Driveways & Patios Ltd | Construction | 2022 |
| Lymm Family Law Limited | Professional & scientific | 2010 |
| Lymm Green Ltd | Administrative & support | 2018 |
| Lymm Hotel Limited | Extraterritorial | 2006 |
| Lymmbrook House Management Limited | Households | 2002 |
| Lynch & Co Services Ltd | Other services | 2019 |
| Lynch Consulting Services Limited | Wholesale & retail | 2013 |
| Lynfield Flat Management Limited | Households | 1975 |
| Lynk Management Ltd | Information & communication | 2024 |
| Lynne Norman Consulting Limited | Professional & scientific | 2017 |
| Lynwood Consultancy Limited | Professional & scientific | 2025 |
| Lynwood Holdings Limited | Health & social care | 2019 |
| Lynyer Ltd | Wholesale & retail | 2018 |
| Lyons Architects Limited | Professional & scientific | 2013 |
| LYW Projects Limited | Professional & scientific | 2026 |
| M & a Finance Ltd | Financial services | 2007 |
| M & J Support Services CIC | Health & social care | 2018 |
| M & S One Limited | Financial services | 2025 |
| M & S Three Limited | Financial services | 2025 |
| M & S Two Limited | Financial services | 2025 |
| M & S Waterservices Holdings Limited | Other services | 2019 |
| M & SL Wealth Management Ltd | Financial services | 2011 |
| M a Davison Contracting Limited | Professional & scientific | 2019 |
| M and J Tech Limited | Information & communication | 2021 |
| M B Heating Group Finance Limited | Financial services | 2018 |
| M B Heating Group Holdings Limited | Financial services | 2018 |
| M Bayolo IT Consultancy Limited | Professional & scientific | 2023 |
| M Beauty Ltd | Wholesale & retail | 2006 |
| M BEE Transport Limited | Transport & logistics | 2026 |
| M Brewer Project Services Limited | Professional & scientific | 2020 |
| M Chorlton Ltd | Wholesale & retail | 2012 |
| M Developments Limited | Construction | 2012 |
| M Eteson Ltd | Construction | 2022 |
| M J Duschenes Ltd | Professional & scientific | 2013 |
| M J Harrington Consulting Limited | Administrative & support | 2005 |
| M J Tighe Ltd | Health & social care | 2010 |
| M Kane Limited | Real estate | 2020 |
| M M Elsherbiny Ltd | Health & social care | 2024 |
| M Naidu Estates Limited | Real estate | 2022 |
| M R Drylining North West Limited | Construction | 2015 |
| M Square III Limited | Real estate | 2021 |
| M V Hodgson Limited | Professional & scientific | 2017 |
| M&A Advisory Services Limited | Professional & scientific | 2022 |
| M&A Property Management Ltd | Real estate | 2017 |
| M&E Installation & Consultancy Ltd | Administrative & support | 2020 |
| M&H World Ltd. | Wholesale & retail | 2016 |
| M&M Property Investors Ltd | Real estate | 2026 |
| M&R Store Ltd | Wholesale & retail | 2025 |
| M'Dora Ltd | Wholesale & retail | 2024 |
| M-Flyi LLP | | 2018 |
| M. & S. Waterservices Limited | Manufacturing | 1988 |
| M. Stephens Limited | Health & social care | 2022 |
| M.B. Express Courier Services Ltd | Transport & logistics | 2026 |
| M.Boheme Limited | Professional & scientific | 2018 |
| M.F.D. Associates Limited | Health & social care | 2017 |
| M.G.Tobin Ltd | Health & social care | 2024 |
| M.H. Governance Limited | Professional & scientific | 2026 |
| M.Radwan Medical Services Ltd | Health & social care | 2026 |
| M.S.B. Hygiene Ltd | Construction | 2016 |
| M.S.E Consultants Limited | Professional & scientific | 2023 |
| M2 Piccadilly Limited Partnership | | 2002 |
| M20 Consulting Limited | Information & communication | 2007 |
| M22 Promotions Limited | Arts & recreation | 2017 |
| M2M Enterprise Limited | Real estate | 2020 |
| M4 Urban Developments Limited | Real estate | 2022 |
| MA Tax Limited | Professional & scientific | 2022 |
| Maarij Ltd | Health & social care | 2024 |
| MAB Assets Ltd | Real estate | 2025 |
| Mabz Foodz Ltd | Hospitality | 2026 |
| MAC Security Consulting Limited | Professional & scientific | 2015 |
| Macgregor & Andrew Consultancy Ltd | Professional & scientific | 2023 |
| Mach 25 Limited | Professional & scientific | 2024 |
| Mach Industries UK Ltd. | Information & communication | 2026 |
| Machin Place Residents Limited | Households | 2025 |
| Machin Place Residents Management Company Limited | Households | 2016 |
| Mackay Properties (NW) Ltd | Real estate | 2018 |
| Mackay Software Limited | Professional & scientific | 2023 |
| Mackenzie Enterprise Ltd | Real estate | 2025 |
| Mackfoxel NIA Properties Ltd | Real estate | 2024 |
| Mackintosh Consulting Limited | Professional & scientific | 2021 |
| Macleod Business Finance Limited | Financial services | 2025 |
| Macmo Limited | Information & communication | 2026 |
| Macnaughton Lord 2000 Limited | Administrative & support | 1999 |
| Macplan NW Limited | Construction | 2012 |
| Macwest Projects Limited | | 2001 |
| Mad's Motivation Ltd | Professional & scientific | 2016 |
| Mada Properties Ltd | Construction | 2018 |
| Madalex Limited | Information & communication | 2020 |
| Madden Management Limited | Professional & scientific | 2021 |
| Maddox Bidco Limited | Financial services | 2018 |
| Maddox Newco Limited | Financial services | 2018 |
| Madforit Ltd | Information & communication | 2019 |
| Madhavan Design Limited | Professional & scientific | 1994 |
| Madira Property Services Ltd | Real estate | 2021 |
| Madmicrobe Studios UK Ltd | Information & communication | 2021 |
| Maei Group Limited | Real estate | 2023 |
| Maei Limited | Construction | 2025 |
| Maestro Global Solutions Limited | Professional & scientific | 2024 |
| Maetrics Limited | Professional & scientific | 2002 |
| MAF Automation Limited | Professional & scientific | 2020 |