| MA UK Holdings Ltd | Wholesale & retail | 2019 |
| MA Works Ltd | Hospitality | 2025 |
| MAA Homes Ltd | Real estate | 2018 |
| MAA Parwati Limited | Information & communication | 2007 |
| Maak Square Limited | Real estate | 2025 |
| Maaktelsolutions Ltd. | Information & communication | 2019 |
| Maamz Ltd | Wholesale & retail | 2018 |
| Maarifa Consultancy Services Ltd | Administrative & support | 2020 |
| Maasa Digital Ltd | Information & communication | 2024 |
| Maaz Brother Limited | Manufacturing | 2024 |
| Maaz Services Ltd | Transport & logistics | 2024 |
| MAB4 Ltd | Hospitality | 2026 |
| Mabasa Consulting Ltd | Real estate | 2019 |
| MAC Accounting Services Limited | Professional & scientific | 2021 |
| MAC and Phone FIX Ltd | Wholesale & retail | 2018 |
| MAC International Business Consultants Ltd | Professional & scientific | 2023 |
| MAC Plumbing and Heating Ltd | Construction | 2021 |
| MAC5 Personal Fitness Ltd | Health & social care | 2019 |
| Macanta Solutions Ltd | Construction | 2011 |
| Machinery Plant &Trucks Limited | Manufacturing | 2025 |
| Maciaszek Transport Limited | Transport & logistics | 2015 |
| Macino Entertainment Hollywood Films Corporation UK Limited | Information & communication | 2021 |
| Maciu Construct Ltd | Construction | 2019 |
| Mackenzie (AN7) Limited | Construction | 2021 |
| Mackenzie (Chaplin Court) Limited | Real estate | 2023 |
| Mackenzie (Euro House) Ltd | Construction | 2021 |
| Mackenzie (Greenford) Limited | Construction | 2020 |
| Mackenzie (KEW Bridge) Limited | Real estate | 2017 |
| Mackenzie (Parsonage Lane) Limited | Construction | 2020 |
| Mackenzie (RUB1X) Limited | Real estate | 2021 |
| Mackenzie (Squirrels) Limited | Construction | 2022 |
| Mackenzie (Stoke House) Ltd | Construction | 2021 |
| Mackenzie (Stoke RD NO 1) Ltd | Construction | 2017 |
| Mackenzie (Vanburgh Court) Limited | Real estate | 2021 |
| Mackenzie (Viveash) Limited | Construction | 2015 |
| Mackenzie Accountants Ltd | Professional & scientific | 2025 |
| Mackenzie Homes Group Limited | Financial services | 2022 |
| Mackenzie Homes Limited | Construction | 2017 |
| Mackenzie Retail Ltd | Wholesale & retail | 2025 |
| Mackenzie Spencer Investments Limited | Professional & scientific | 2017 |
| Macro Research Technologies Ltd | Information & communication | 2026 |
| Mada Property Holdings Ltd | Real estate | 2025 |
| Madalin Matei Ltd | Transport & logistics | 2024 |
| Madalinas Cars Ltd | Wholesale & retail | 2025 |
| Maddeux Limited | Construction | 2025 |
| Maddina Ltd | Hospitality | 2025 |
| Maddy UX Limited | Information & communication | 2019 |
| Made by Monti Ltd | Manufacturing | 2026 |
| Made in ZWE Ltd | Wholesale & retail | 2026 |
| Madhav Software Solutions Limited | Information & communication | 2010 |
| Madhusneh Ltd | Real estate | 2023 |
| Madina Autocentre Ltd | Wholesale & retail | 2025 |
| Madina Mobile Repair Ltd | Wholesale & retail | 2023 |
| Madinia Solutions Limited | Manufacturing | 2025 |
| Madi’S Mart Limited | Wholesale & retail | 2025 |
| Madni Halal Meat Ltd | Wholesale & retail | 2021 |
| Madumere Limited | Real estate | 2016 |
| Maec & Co Ltd | Financial services | 2025 |
| Mafhh 14 Limited | Manufacturing | 2018 |
| Maga Technologies Limited | Information & communication | 2013 |
| Magasu Limited | Wholesale & retail | 2025 |
| Magenta Building Limited | Construction | 2016 |
| Magic Accident Repair Limited | Wholesale & retail | 2026 |
| Magic Landscaping Ltd | Construction | 2025 |
| Magic Touch HB Limited | Other services | 2019 |
| Magic Transport MK Ltd | Transport & logistics | 2016 |
| Magicbrick Lettings Ltd | Real estate | 2025 |
| Magna Carta College Limited | Education | 2012 |
| Magna Pecunia Services Ltd | Professional & scientific | 2024 |
| Magnet Mantra Limited | Extraterritorial | 2021 |
| Magnicore Trading Ltd | Wholesale & retail | 2025 |
| Magnify IT Limited | Information & communication | 2011 |
| Magnolia Bakery Ltd | Manufacturing | 2024 |
| Magnolia Beauty Ltd | Other services | 2018 |
| Magnus Care Group Limited | Health & social care | 2018 |
| Magnus Care Holdings Limited | Health & social care | 2020 |
| Magnus Care Midco Limited | Health & social care | 2020 |
| Magpiesmart Ltd | Wholesale & retail | 2024 |
| MAH Accountants Ltd | Professional & scientific | 2011 |
| MAH Blackpool Ltd | Hospitality | 2025 |
| MAH Consult Ltd | Administrative & support | 2026 |
| MAH Properties London Limited | Real estate | 2024 |
| Maha Estates Limited | Real estate | 2025 |
| Mahabir Ltd | Construction | 2024 |
| Mahakal Holdings Ltd | Administrative & support | 2021 |
| Mahakal Properties UK Ltd | Real estate | 2018 |
| Mahalo Holdings Ltd | Real estate | 2024 |
| Mahar Garments Enterprises Ltd | Wholesale & retail | 2013 |
| Mahari Ltd | Hospitality | 2024 |
| Mahasin Trading Limited | Wholesale & retail | 2013 |
| Mahayantra Ltd | Information & communication | 2003 |
| Mahe Technologies Limited | Information & communication | 2020 |
| Maher & Young London Limited | Real estate | 2019 |
| Maher Retail Ltd | Wholesale & retail | 2025 |
| Mahey Group Ltd | Real estate | 2018 |
| Mahhad Halal Meat Ltd | Wholesale & retail | 2020 |
| Mahiibakes Ltd | Manufacturing | 2023 |
| Mahinder Ltd | Wholesale & retail | 2024 |
| Mahmitiy Limited | Wholesale & retail | 2022 |
| Mahmood Ltd | Wholesale & retail | 2026 |