| Malik Body Repairs Ltd | Wholesale & retail | 2026 |
| Malik Haider Traders Ltd | Wholesale & retail | 2025 |
| Malik Latif Ltd | Wholesale & retail | 2022 |
| Malik Line Empires Ltd. | Real estate | 2019 |
| Malik X Ltd | Wholesale & retail | 2023 |
| MALIK786 Ltd | Real estate | 2017 |
| Maliszewski Limited | Hospitality | 2020 |
| Malizana Ltd | Wholesale & retail | 2025 |
| Maljian Servies Limited | Wholesale & retail | 2023 |
| Malkit Bharj Casting Ltd | Arts & recreation | 2018 |
| Malleus Trade Ltd | Wholesale & retail | 2026 |
| Mallix Group Ltd | Wholesale & retail | 2019 |
| Mallon Associates International Limited | Information & communication | 2007 |
| Mallory Capital Limited | Other services | 2025 |
| Mallory World Limited | Professional & scientific | 2024 |
| Mallows Limited | Wholesale & retail | 2020 |
| Malltech Ltd | Wholesale & retail | 2025 |
| Malmane Ltd | Wholesale & retail | 2019 |
| Malmee Ltd | Wholesale & retail | 2025 |
| Malmpit Solar Limited | Energy | 2010 |
| Malnapyts Ltd | Wholesale & retail | 2025 |
| Malone Transport Ltd | Transport & logistics | 2020 |
| Malthouse Apartments Management Company Limited | Households | 2022 |
| Maltundag Global Ltd | Wholesale & retail | 2024 |
| Malvern Drive Limited | Real estate | 2016 |
| Malvern News Limited | Transport & logistics | 2026 |
| Malvone PC | | 2017 |
| MAM Homes Ltd | Construction | 2017 |
| MAM Sports Limited | Manufacturing | 2024 |
| Mama Fuego Limited | Hospitality | 2019 |
| Mama MIA Limited | Wholesale & retail | 2003 |
| Mama Nati Limited | Manufacturing | 2019 |
| Mama's Caribbean Cuisine Ltd | Hospitality | 2024 |
| Maman Burkina Ltd | Mining & quarrying | 2025 |
| Mami Ecom Ltd | Wholesale & retail | 2025 |
| Mamma YAM Ltd | Education | 2025 |
| Mammbo Group Limited | Information & communication | 2017 |
| Mammor Limited | Other services | 1996 |
| Mammoth Gains Limited | Wholesale & retail | 2014 |
| Mamoode Solutions Ltd | Wholesale & retail | 2021 |
| Mamr Ltd | Health & social care | 2021 |
| MAN Sang Foods Ltd | Hospitality | 2014 |
| MAN Sang Properties Limited | Real estate | 2003 |
| MAN Security Company Ltd | Administrative & support | 2019 |
| Mana Construction Solutions Ltd | Professional & scientific | 2018 |
| Manafon Travel Ltd | Transport & logistics | 2018 |
| Manage Innovations Ltd | Professional & scientific | 2024 |
| Managed Operations Systems and Logistics Asset Management Ltd | Information & communication | 2025 |
| Management & Strategy Consulting Ltd | Financial services | 2021 |
| Management Acumen Limited | Other services | 2000 |
| Management Company for 14 Violet ROW Cardiff Limited | Households | 2019 |
| Management Icon Ltd | Professional & scientific | 2019 |
| Managing Ahead Ltd | Real estate | 2025 |
| Managing Maintenance Resources Holdings Limited | Information & communication | 2014 |
| Managos Site Management Limited | Professional & scientific | 2014 |
| Manais Ltd | Wholesale & retail | 2024 |
| Manas AF Ltd | Wholesale & retail | 2018 |
| Manas Technology Limited | Manufacturing | 2026 |
| Manatarms Limited | Hospitality | 2017 |
| Mancala Holdings PLC | Financial services | 2023 |
| Manchester Building Solutions Ltd | Construction | 2019 |
| Manchester Car Company Ltd | Households | 2025 |
| Manchester Fabrications Limited | Manufacturing | 2016 |
| Manchester Gutters Limited | Construction | 2018 |
| Manchester Jelmall Trade Ltd | Wholesale & retail | 2025 |
| Manchester Legal Services Ltd | Professional & scientific | 2010 |
| Manchester Plastic Recycling Ltd | Manufacturing | 2017 |
| Manchester Property Installations Limited | Construction | 2018 |
| Manchester Vista Ltd | Wholesale & retail | 2014 |
| Manconhouse Ltd | Information & communication | 2019 |
| Manda International Logistics Ltd | Transport & logistics | 2021 |
| Mandaco 799 Limited | Information & communication | 2014 |
| Mandalblit Services Limited | Information & communication | 2019 |
| Mandi & Grill House Limited | Hospitality | 2025 |
| Mandilas Consulting Limited | Professional & scientific | 2015 |
| Mandmproperties (Cardiff) Ltd | Real estate | 2019 |
| Mandrake Beauregard Limited | Professional & scientific | 1999 |
| Mandrew Builders Limited | Construction | 2003 |
| Mandrew Construction Limited | Construction | 2014 |
| Mandy House Ltd | Hospitality | 2025 |
| Mane Security Ltd | Administrative & support | 2020 |
| Manev Future Ltd | Professional & scientific | 2020 |
| Manfield Heating Ltd | Construction | 2024 |
| Mangal Cardiff Ltd | Hospitality | 2025 |
| Mangano Inc PC | | 2016 |
| Mangg Limited | Wholesale & retail | 2025 |
| Mangitalia Ltd | Hospitality | 2014 |
| Mango Automotive Limited | Wholesale & retail | 2016 |
| Mango Commerce Ltd | Information & communication | 2019 |
| Mango Property Limited | Administrative & support | 2002 |
| Manguard Security Ltd | Other services | 2019 |
| Manhattan Grove Ltd | Administrative & support | 2025 |
| Mani Bakrania Ltd | Information & communication | 2019 |
| Manidata Ltd | Information & communication | 2025 |
| Manidra Systems Ltd | Information & communication | 2025 |
| Maniek Ltd | Transport & logistics | 2025 |
| Manifest a Better Life Ltd | Wholesale & retail | 2024 |
| Manifesta Ltd | Information & communication | 2024 |
| Manifesto Foods (Properties) Limited | Manufacturing | 2015 |
| Manifesto Foods Ltd | Manufacturing | 2015 |