| Metagen Markets Ltd | Financial services | 2024 |
| Metal Corporations Ltd | Wholesale & retail | 2023 |
| Metalic Crafts Ltd | Manufacturing | 2025 |
| Metallic Products Limited | Other services | 2017 |
| Metalonix Limited | Manufacturing | 2023 |
| Metaminds Solutions Limited | Information & communication | 2024 |
| Metarm Limited | Arts & recreation | 1991 |
| Metaspeed Limited | Wholesale & retail | 2018 |
| Metatech London Ltd | Wholesale & retail | 2025 |
| Method Digital Ltd | Information & communication | 2018 |
| Metics Solutions Ltd | Wholesale & retail | 2020 |
| Metier Businesses Limited | Wholesale & retail | 2015 |
| Metmev 76 Ltd | Hospitality | 2018 |
| Metric Fabrications Ltd | Manufacturing | 2018 |
| Metrics Estates Ltd | Real estate | 2022 |
| Metro Accountants Ltd | Professional & scientific | 2014 |
| Metro Bazar Cash & Carry Ltd | Wholesale & retail | 2026 |
| Metro Builders Group Ltd | Construction | 2025 |
| Metro City Security Ltd | Financial services | 2022 |
| Metro Coffee UK Ltd | Hospitality | 2016 |
| Metro Consultancy Services Ltd | Professional & scientific | 2021 |
| Metro Development Solutions Limited | Professional & scientific | 2006 |
| Metro Facades Ltd | Construction | 2022 |
| Metro Facilities Services Ltd | Administrative & support | 2019 |
| Metro Imports & Exports Ltd | Wholesale & retail | 2022 |
| Metro Money Ltd | Wholesale & retail | 2025 |
| Metro Property Ltd | Real estate | 2024 |
| Metro Services Ltd | Wholesale & retail | 2012 |
| Metro Super Saver Limited | Wholesale & retail | 2010 |
| Metro Trading Limited | Extraterritorial | 2010 |
| Metrolocal Plumbing Limited | Construction | 2025 |
| Metropolitan Residential Limited | Real estate | 2015 |
| Metropolitan Training Ltd | Education | 2018 |
| Mett Platforms Ltd | Information & communication | 2026 |
| Mettle Club Ltd | Wholesale & retail | 2023 |
| Mexo Apps Ltd | Information & communication | 2025 |
| Meyman Ltd | Wholesale & retail | 2018 |
| Mezanger Global Ltd | Information & communication | 2019 |
| Mezbani Ltd | Hospitality | 2023 |
| Mezze Restaurant Limited | Extraterritorial | 2013 |
| MF Akhtar Limited | Wholesale & retail | 2025 |
| MF Brightness Ltd | Administrative & support | 2023 |
| MF Trading&Co Ltd | Wholesale & retail | 2025 |
| MFA International Ltd | Administrative & support | 2018 |
| MFB Traders Ltd | Construction | 2021 |
| MFH Welfare Ltd | Health & social care | 2021 |
| Mfjr Ltd | Hospitality | 2025 |
| MFM Hire Ltd | Administrative & support | 2018 |
| MFN Construction & Services Ltd | Construction | 2026 |
| MFN Electrical Limited | Construction | 2006 |
| MG Barbers London Limited | Other services | 2024 |
| MG Facilities Management Ltd | Administrative & support | 2020 |
| MG Glass Design Ltd | Construction | 2025 |
| MG Services Essex Limited | Transport & logistics | 2017 |
| MG U Capitals Ltd | Wholesale & retail | 2025 |
| MGI Wolmer Gardens Limited | Real estate | 2021 |
| Mgjoshi Global Ltd | Wholesale & retail | 2025 |
| MGK Group Ltd | Construction | 2004 |
| MGL Protection Ltd | Administrative & support | 2024 |
| MGM Grand Builders Limited | Construction | 2022 |
| MGT Properties 'the Hive' Limited | Real estate | 2019 |
| MH Digital Ventures Ltd | Information & communication | 2026 |
| MH Gants Hill Ltd | Hospitality | 2022 |
| MH GAS & Electrical Solutions Ltd | Construction | 2018 |
| MH Haven International Ltd | Wholesale & retail | 2025 |
| MH Maintenance Services Ltd | Construction | 2019 |
| MH MED Limited | Health & social care | 2016 |
| MH Sattar Limited | Wholesale & retail | 2025 |
| MH SME Service Ltd | Professional & scientific | 2025 |
| MHA Motors Ltd | Wholesale & retail | 2017 |
| MHA Property Developments Ltd | Real estate | 2017 |
| MHA Supplies Ltd | Wholesale & retail | 2026 |
| MHE Partners Limited | Professional & scientific | 2018 |
| MHH Holdings Limited | Real estate | 2018 |
| Mhkk Properties Ltd | Real estate | 2021 |
| MHL Property Management Ltd | Real estate | 2020 |
| MHM Enterprises Ltd | Wholesale & retail | 2021 |
| MHM Motors Ltd | Administrative & support | 2019 |
| MHN Cars Ltd | Wholesale & retail | 2024 |
| MHP 59 Limited | Real estate | 2023 |
| MHP and RBP Properties Ltd | Real estate | 2024 |
| MHR Commerce Ltd | Wholesale & retail | 2026 |
| MHR Consulting Ltd | Information & communication | 2012 |
| MHR Support Services Ltd | Other services | 2025 |
| Mhrs Practice Management Ltd | Professional & scientific | 2024 |
| MHS Consultancy Limited | Administrative & support | 2016 |
| MHS Invest Limited | Real estate | 2024 |
| MI & CK Investments Ltd | Real estate | 2020 |
| MI Corporation Ltd | Wholesale & retail | 2025 |
| MI Global Goods Ltd | Wholesale & retail | 2025 |
| MI Kensington Holdings Ltd | Real estate | 2023 |
| MI Pharma Ltd | Wholesale & retail | 2012 |
| MI Retail Vista Ltd | Wholesale & retail | 2024 |
| MIA Investments (UK) Ltd | Real estate | 2014 |
| MIA Transport Ltd | Construction | 2024 |
| Miaa Housing Limited | Real estate | 2026 |
| Miah Foods Ltd | Hospitality | 2017 |
| Mian A&S Ltd | Administrative & support | 2025 |
| Mian Azhar Ltd | Wholesale & retail | 2020 |
| Mian Builders Limited | Construction | 2018 |