| Madina-Accramarket Ltd | Wholesale & retail | 2020 |
| Madison Hospitality Limited | Hospitality | 2025 |
| Madison SQ Developments Limited | Construction | 2022 |
| Madison Ventures Limited | Real estate | 2000 |
| Madni Digital PVT Ltd | Professional & scientific | 2025 |
| Madre Holdings 10 Limited | Real estate | 2023 |
| Madre Holdings 10 Residential Limited | Real estate | 2023 |
| Madre Holdings 11 Limited | Real estate | 2023 |
| Madre Holdings 12 Limited | Real estate | 2024 |
| Madre Holdings 14 Ltd | Real estate | 2024 |
| Madre Holdings 15 Limited | Real estate | 1996 |
| Madre Holdings 16 Limited | Real estate | 2026 |
| Madre Holdings 2 Ltd | Construction | 2017 |
| Madre Holdings 3 Ltd | Real estate | 2018 |
| Madre Holdings 4 Ltd | Real estate | 2020 |
| Madre Holdings 5 Ltd | Real estate | 2021 |
| Madre Holdings 6 Limited | Construction | 2022 |
| Madre Holdings 7 Limited | Real estate | 2022 |
| Madre Holdings 8 Limited | Real estate | 2022 |
| Madre Holdings 9 Ltd | Real estate | 2023 |
| Madre Holdings Ltd | Real estate | 2016 |
| Maegnas Limited | Information & communication | 2026 |
| Maersk Company Limited(The) | Transport & logistics | 1951 |
| Maersk Healthcare Trustee Limited | Health & social care | 2013 |
| Maersk Holdings Limited | Transport & logistics | 1983 |
| Maersk Line UK Limited | Transport & logistics | 1965 |
| Maersk OIL Trading UK Limited | Wholesale & retail | 2016 |
| Maersk RBS Pension Trustee Ltd. | Financial services | 2004 |
| Maestro Detailing Ltd | Administrative & support | 2024 |
| Maestro Elite Ltd | Education | 2021 |
| Maestro Lpool Service Limited | Wholesale & retail | 2025 |
| Maestro Tour Management Limited | Administrative & support | 2001 |
| Maffleck Holdings Limited | Administrative & support | 2015 |
| Mafuva Limited | Health & social care | 2019 |
| MAG UK Management Ltd | Hospitality | 2023 |
| Mag-Cees Ltd | Wholesale & retail | 2025 |
| Magal Rental Ltd | Real estate | 2026 |
| Magan Carpets & Flooring Limited | Wholesale & retail | 2007 |
| Magazin Ltd | Wholesale & retail | 2020 |
| Magbirt Project Management Limited | Professional & scientific | 2024 |
| Magdale Farm Cottages Limited | Hospitality | 2021 |
| Magee GAS Services Ltd | Construction | 2018 |
| Magellan Robotech Limited | Information & communication | 1997 |
| Magellan Sport Limited | Information & communication | 2025 |
| Magenta Box Limited | Real estate | 2023 |
| Magenta Software Games Limited | Administrative & support | 2004 |
| Magenta Software Limited | Administrative & support | 2010 |
| Magestic Holdings Limited | Financial services | 2024 |
| Maggie Collections Limited | Other services | 2018 |
| Maggie May's Enterprise Ltd | Hospitality | 2014 |
| Maggie Mays Limited | Wholesale & retail | 2002 |
| Maggie Properties Ltd | Real estate | 2023 |
| Maggs Shipping Ltd. | Transport & logistics | 2000 |
| Maghull Bathroom & DIY Centre Limited | Wholesale & retail | 2011 |
| Maghull Cask Limited | Hospitality | 2018 |
| Maghull Delivery Ltd | Hospitality | 2019 |
| Maghull Developments (68/70 Hope Street) Limited | Real estate | 2006 |
| Maghull Developments (Crosby) Limited | Real estate | 2005 |
| Maghull Developments (Guildhall) Limited | Real estate | 2004 |
| Maghull Developments (Hahnemann House) Limited | Real estate | 2006 |
| Maghull Developments (Josephine Butler House) Limited | Real estate | 2006 |
| Maghull Developments Ltd | Construction | 2024 |
| Maghull Estates Limited | Real estate | 2020 |
| Maghull Factory Carpets Limited | Wholesale & retail | 1998 |
| Maghull Fish Bar L31 Ltd | Hospitality | 2025 |
| Maghull Food Catering Company Limited | Hospitality | 2015 |
| Maghull Heating & Plumbing Limited | Construction | 2002 |
| Maghull Home Improvements Ltd | Other services | 2026 |
| Maghull Investments (Maghull Town Centre) Limited | Real estate | 2004 |
| Maghull MOT & Service Centre Limited | Wholesale & retail | 2014 |
| Maghull Nails Limited | Other services | 2025 |
| Maghull Plant Hire Ltd | Construction | 2020 |
| Maghull Properties Limited | Real estate | 2011 |
| Maghull Shutters & Blinds Ltd | Wholesale & retail | 2024 |
| Maghull Surfacing Ltd | Construction | 2019 |
| Maghull Thai Boxing CIC | Health & social care | 2024 |
| Maghullit Limited | Other services | 2013 |
| Magic Balance Limited | Professional & scientific | 2025 |
| Magic Button Creations Ltd | Information & communication | 2011 |
| Magic Cuts Liverpool Ltd | Other services | 2026 |
| Magic Elite Cleaning Services Ltd | Administrative & support | 2025 |
| Magic Evolve Limited | Professional & scientific | 2025 |
| Magic Keke Food Ltd | Wholesale & retail | 2024 |
| Magic Makers Event Planners UK Ltd | Professional & scientific | 2026 |
| Magic Meli Cleaning Ltd | Administrative & support | 2024 |
| Magic Mops Cleaning Company Ltd | Administrative & support | 2023 |
| Magic Paper Marketing Limited | Manufacturing | 2026 |
| Magic Parcels Logistics Ltd | Transport & logistics | 2026 |
| Magic Pro UK Ltd | Hospitality | 2022 |
| Magic Resourcing Limited | Professional & scientific | 2025 |
| Magic Resourcing Recruit Limited | Administrative & support | 2025 |
| Magic Strategy Limited | Professional & scientific | 2025 |
| Magic Tarot Ltd | Wholesale & retail | 2022 |
| Magic Willow Limited | Wholesale & retail | 2021 |
| Magical Accessories Ltd | Manufacturing | 2011 |
| Magical Mystery Tour Ltd | Administrative & support | 2016 |
| Magicbricks Limited | Real estate | 2017 |
| Magill Solutions Limited | Administrative & support | 2013 |
| Magitec Ltd | Arts & recreation | 2025 |
| Magma Cloud Limited | Information & communication | 2015 |