| MAE Property Holdings Ltd | Financial services | 2025 |
| Maestro Hairstylist Limited | Other services | 2021 |
| Mafhh-It Communications Ltd | Other services | 2018 |
| Mafunzo Ltd | Professional & scientific | 2025 |
| MAG PG Ltd | Information & communication | 2023 |
| Mag-An Scientific & Technical Consultancy Ltd | Professional & scientific | 2025 |
| Mag-An Scientific Consultancy Ltd | Professional & scientific | 2024 |
| Maga Mart Ltd | Wholesale & retail | 2024 |
| Magaret Clothing Hair and Beauty Ltd | Wholesale & retail | 2025 |
| Magf Ltd | Administrative & support | 2023 |
| Magfacilities Ltd | Administrative & support | 2022 |
| Maghrib Group Ltd | Information & communication | 2019 |
| Magic Doner Ltd | Hospitality | 2023 |
| Magic EYE G Ltd | Construction | 2024 |
| Magic G Trans Ltd | Transport & logistics | 2019 |
| Magic Hand Car Wash & Valeting Centre Ltd | Wholesale & retail | 2025 |
| Magic Tyres Limited | Wholesale & retail | 2015 |
| Magical World Ltd | Wholesale & retail | 2018 |
| Magnet Poster Properties Limited | Real estate | 1995 |
| Magnet Properties Construction Ltd | Construction | 2007 |
| Magnet Scaffolding Ltd | Construction | 2017 |
| Magpie Nest Holdings Limited | Financial services | 2023 |
| Magpies Cleaning Services Limited | Administrative & support | 2026 |
| Mags & Scott Ltd | Administrative & support | 2025 |
| Magsnap Ltd | Wholesale & retail | 2025 |
| Magz Holdings Limited | Wholesale & retail | 2024 |
| Mahalakshmy Ltd | Wholesale & retail | 2025 |
| Maham and Meerab Ltd | Wholesale & retail | 2026 |
| Mahar Law Chamber Ltd | Professional & scientific | 2024 |
| Mahaz Ltd | Real estate | 2023 |
| Mahdere Pharma Services Ltd | Health & social care | 2026 |
| Maheera Limited | Hospitality | 2016 |
| Mahi Infra Construction Ltd | Manufacturing | 2026 |
| Mahir Luton Limited | Wholesale & retail | 2008 |
| Mahira Spice Ltd | Hospitality | 2025 |
| Mahmutaj Group Ltd | Construction | 2026 |
| Mahone Bay Ventures Ltd | Real estate | 2025 |
| Mahrun & Co Ltd | Transport & logistics | 2024 |
| MAI Traders Limited | Wholesale & retail | 2025 |
| Maid Couriers Ltd | Transport & logistics | 2019 |
| Maida Kitchens Outlet Ltd | Manufacturing | 2026 |
| Maidenhall Community Preschool Ltd | Education | 2022 |
| Maidenhall Engineering Services Limited | Professional & scientific | 2011 |
| Maimoona Holdings Ltd | Financial services | 2024 |
| Maimoona Properties Ltd | Real estate | 2024 |
| Main Customer Limited | Wholesale & retail | 2020 |
| Mainstream Engineering Ltd | Mining & quarrying | 2021 |
| Maintenance AIA Ltd | Construction | 2026 |
| Maintenance and Compliance Ltd | Construction | 2024 |
| Mair Capital Ltd | Real estate | 2025 |
| Maira Tradings Ltd | Wholesale & retail | 2021 |
| Maison DE Creme Ltd | Hospitality | 2021 |
| Maisoncore Ltd | Construction | 2025 |
| Maisunu Ltd | Health & social care | 2025 |
| Majestic Companies Limited | Financial services | 2019 |
| Majestic Drives and Patios Ltd | Construction | 2018 |
| Majestic Move Ltd | Real estate | 2018 |
| Majestic Property Management Limited | Real estate | 2020 |
| MAJESTIC12HAULAGE Ltd | Transport & logistics | 2020 |
| Majesty Claims Ltd | Professional & scientific | 2015 |
| Majesté Ltd | Wholesale & retail | 2022 |
| Majha Block Ltd | Transport & logistics | 2024 |
| Majha Limited | Construction | 2025 |
| Majha's Logistics Ltd | Transport & logistics | 2025 |
| MAJHA183RECORDS Limited | Information & communication | 2025 |
| Majid Holdings Limited | Real estate | 2017 |
| Majithia Properties Limited | Real estate | 2021 |
| Majnet Limited | Information & communication | 2019 |
| Major Move Limited | Real estate | 2019 |
| Major Security Limited | Professional & scientific | 2019 |
| Major Used Cars Ltd | Wholesale & retail | 2019 |
| Majordean Limited | Other services | 2019 |
| MAK Business Consultants Ltd | Professional & scientific | 2019 |
| MAK Recruitment International Ltd | Administrative & support | 2024 |
| Makans Ltd | Wholesale & retail | 2009 |
| Makaron Ltd | Other services | 2008 |
| Make Green Energy Ltd | Construction | 2025 |
| Make More Space Construction Ltd | Construction | 2016 |
| Makeup by IZ Ltd | Other services | 2025 |
| Makhdoom Engineering Limited | Transport & logistics | 2025 |
| Maki Properties Limited | Real estate | 2024 |
| Making Childrens Future Ltd | Education | 2024 |
| Makkah Madinah Hajj and Umrah Tours Ltd | Administrative & support | 2024 |
| Maksmark Ltd | Transport & logistics | 2022 |
| Maksmart Ltd | Wholesale & retail | 2025 |
| Makstead Ltd | Transport & logistics | 2018 |
| Maktab Academy Ltd | Professional & scientific | 2019 |
| MAL Engineering Limited | Wholesale & retail | 2015 |
| Malabar Canteen Limited | Hospitality | 2025 |
| MALACHI312 Limited | Information & communication | 2007 |
| Malaika Transport Limited | Transport & logistics | 2018 |
| Malathy UK 1 Ltd | Real estate | 2025 |
| Malathy UK Ltd | Wholesale & retail | 2019 |
| Malcolm Advisory Services Ltd | Professional & scientific | 2022 |
| Malham Close Management Limited | Households | 1988 |
| Malhi Building Construction Limited | Construction | 2020 |
| Malice Media Ltd | Information & communication | 2024 |
| Malii Ltd | Construction | 2016 |
| Malik & Khan Homes Ltd | Real estate | 2023 |
| Malik & Muiz Properties Solutions Ltd | Construction | 2025 |