| Majha Plumbing Ltd | Construction | 2026 |
| Majha Roofings Ltd | Construction | 2024 |
| Majha Trucking Ltd | Transport & logistics | 2025 |
| Majhail Interior Ltd | Construction | 2026 |
| Majhailx Ltd | Transport & logistics | 2026 |
| Major Distro Limited | Transport & logistics | 2026 |
| Majra Enterprises Ltd | Transport & logistics | 2025 |
| MAK Builders & Developers Ltd | Construction | 2020 |
| Make My Production UN Limited | Information & communication | 2024 |
| Make YOU Live UK Limited | Information & communication | 2025 |
| Makeupbygolondon Ltd | Other services | 2021 |
| Makflooring Ltd | Construction | 2023 |
| Makhan Roofing Limited | Construction | 2023 |
| Makkah Halal Hayes Ltd | Wholesale & retail | 2025 |
| Maksimoo Limited | Wholesale & retail | 2025 |
| MAL Payment Ltd | Financial services | 2024 |
| Malden Hall Ltd | Construction | 2014 |
| Malka Properties Ltd | Real estate | 2023 |
| Malligas Ltd. | Wholesale & retail | 2009 |
| Malwa Belt Brickwork Ltd | Construction | 2024 |
| Malwa Block Ltd | Transport & logistics | 2025 |
| Malwa Brick Work Limited | Construction | 2024 |
| Mama Plates Ltd | Wholesale & retail | 2022 |
| Mamacoco Store Limited | Wholesale & retail | 2026 |
| Mamg Healthcare Services Ltd | Health & social care | 2023 |
| Man-Singh Builders London Ltd | Construction | 2025 |
| Manadi Limited | Wholesale & retail | 2024 |
| Manakamana Emporium Limited | Wholesale & retail | 2016 |
| Manat Food & Wine Ltd | Wholesale & retail | 2026 |
| Manatt Construction Ltd | Construction | 2025 |
| Manavk Barbers Limited | Other services | 2022 |
| Mancy Ltd | Hospitality | 2025 |
| Mandeep Bagri Ltd | Construction | 2023 |
| Mandeep Bisran Ltd | Professional & scientific | 2025 |
| Mandeep Transport Ltd | Transport & logistics | 2018 |
| Mander Brothers Construction Ltd | Construction | 2022 |
| Mandil Ltd | Other services | 2013 |
| Mandy Kaur Ltd | Hospitality | 2025 |
| Maneet Grover Ltd | Wholesale & retail | 2025 |
| Mangajo UK Limited | Wholesale & retail | 2001 |
| Mangal Bar & Restaurant Ltd | Hospitality | 2025 |
| Mangat Global Ltd | Wholesale & retail | 2023 |
| Mangat Ltd | Wholesale & retail | 2022 |
| Mangat Property Ltd | Real estate | 2022 |
| Mangat Roofing Services Ltd | Construction | 2023 |
| Mango Roots Ltd | Wholesale & retail | 2022 |
| Mani Construction London Ltd | Construction | 2026 |
| Mani Food & Wine Ltd | Wholesale & retail | 2025 |
| Manifold Grace Limited | Information & communication | 2015 |
| Manikaran Constructions Ltd | Construction | 2019 |
| Manjeet Builder Ltd | Construction | 2017 |
| Manjit Property Limited | Real estate | 2026 |
| Manjit SINGH2 Ltd | Construction | 2021 |
| Manmeet K Services Limited | Construction | 2026 |
| Mann Distribution Ltd | Transport & logistics | 2015 |
| Mann Optical Limited | Wholesale & retail | 2023 |
| Mann Properties Group UK Ltd | Real estate | 2026 |
| Mannah Ltd | Manufacturing | 2025 |
| Mannat Driving School Ltd | Education | 2025 |
| Mannat Sweet Homes Ltd | Real estate | 2024 |
| Mano Pharma Ltd | Health & social care | 2016 |
| Manors Properties Ltd | Real estate | 2025 |
| Manreet Estates Ltd | Real estate | 2026 |
| Manresa Property Management Ltd | Real estate | 2021 |
| Mansah Adzor Services Limited | Health & social care | 2025 |
| Mansell House Healthcare Ltd | Real estate | 2018 |
| Manta Hair Limited | Professional & scientific | 2015 |
| Manveen Food &Wine Ltd | Wholesale & retail | 2024 |
| Manvi Thind Limited | Real estate | 2025 |
| Manzil Logistics Ltd | Transport & logistics | 2025 |
| MAP Building Ltd | Construction | 2023 |
| Mara Protection Limited | Administrative & support | 2025 |
| Maranatha International Gospel Mission Ltd | Other services | 2023 |
| Marat Constitution Limited | Construction | 2025 |
| Marble Glass Spire Ltd | Manufacturing | 2026 |
| Marcin Zolc Ltd | Transport & logistics | 2026 |
| Marcio Amaral Stress Management Ltd | Health & social care | 2019 |
| Mareli Group Ltd | Real estate | 2022 |
| Mareth Fabrications Limited | Manufacturing | 1993 |
| Marex Investments Ltd | Real estate | 2024 |
| Margate Development Ltd | Construction | 2023 |
| Marhan Ventures Limited | Wholesale & retail | 2025 |
| Maria Consultancy London Ltd | Education | 2012 |
| Maria Real Estate Ltd | Real estate | 2023 |
| Marieston Group Limited | Wholesale & retail | 2025 |
| Marieston Service Centre Ltd | Wholesale & retail | 2026 |
| Marigold Home Care Ltd | Transport & logistics | 2020 |
| Marine Packaging Ltd | Wholesale & retail | 2020 |
| Mario Construct Ltd | Construction | 2015 |
| Mariq Ltd | Wholesale & retail | 2026 |
| Market Venture Ltd | Wholesale & retail | 2024 |
| Markhor Brothers Ltd | Wholesale & retail | 2026 |
| Markhor Traders Limited | Wholesale & retail | 2024 |
| Marko Paulo Ltd. | Hospitality | 2016 |
| Markt Limited | Wholesale & retail | 2025 |
| Marlborough House Spencers Wood Management Limited | Households | 2018 |
| Marlow 3 Ltd | Real estate | 2024 |
| Marlow 4 Ltd | Real estate | 2024 |
| Marok Transport Ltd | Transport & logistics | 2025 |
| Marshall Ridge Consulting Limited | Information & communication | 2025 |