| Mexmy Services Ltd | Other services | 2019 |
| Mexon London Ltd | Wholesale & retail | 2025 |
| Mexxeden Ltd | Wholesale & retail | 2021 |
| Meylux Retail Ltd | Wholesale & retail | 2025 |
| Meynell Capital Ltd | Extraterritorial | 2018 |
| Meyu Ltd | Wholesale & retail | 2025 |
| Mezodigital Ltd | Professional & scientific | 2022 |
| Mezura 3D Ltd | Information & communication | 2019 |
| Mezza Leeds Ltd | Hospitality | 2026 |
| Mezza Luna Restaurant Ltd | Hospitality | 2019 |
| Mezze Dining 1 Ltd | Hospitality | 2019 |
| MF Bars Ltd | Hospitality | 2019 |
| MF Business Partners Ltd | Professional & scientific | 2024 |
| MF Furniture Manufacturing Ltd | Manufacturing | 2025 |
| MF Newbury Construction Services Limited | Construction | 2014 |
| MF65 Ltd | Information & communication | 2021 |
| MFA Motorways UK Limited | Information & communication | 2023 |
| MFD Store Ltd | Wholesale & retail | 2025 |
| MFG Asset Managements Ltd | Manufacturing | 2014 |
| MFG Consulting Ltd | Professional & scientific | 2021 |
| MFG Finance Limited | Administrative & support | 2014 |
| MFI Trading Dropshipping Ltd | Wholesale & retail | 2025 |
| MFM Center Limited | Education | 2018 |
| MFP Maintenance Ltd | Real estate | 2017 |
| MFS Ticaret Ltd | Wholesale & retail | 2022 |
| MFX DM Limited | Transport & logistics | 2018 |
| MFZ Stores Ltd | Wholesale & retail | 2025 |
| MG Ecom Ltd | Wholesale & retail | 2025 |
| MG Fixers Ltd | Construction | 2017 |
| MG Good Works Limited | Administrative & support | 2014 |
| MG Heating & Plumbing Services Ltd | Construction | 2026 |
| MG Innovation Ltd | Information & communication | 2017 |
| MG Insulation Ltd | Wholesale & retail | 2015 |
| MG London Management Ltd | Professional & scientific | 2021 |
| MG OIL & GAS Services Ltd | Construction | 2019 |
| MG Rail Services Limited | Manufacturing | 2025 |
| MG Scale UK Limited | Wholesale & retail | 2026 |
| MG Tax Ltd | Professional & scientific | 2018 |
| Mg-Architecture Ltd | Professional & scientific | 2018 |
| Mgca Holdings Ltd | Real estate | 2026 |
| MGE Properties Limited | Real estate | 2020 |
| MGG Partners Ltd | Professional & scientific | 2014 |
| MGG13 Limited | Arts & recreation | 2024 |
| MGL Site Engineering Ltd | Professional & scientific | 2018 |
| MGM Audio Visual Ltd | Wholesale & retail | 2017 |
| MGM Body Repair and Service Ltd | Manufacturing | 2015 |
| MGM Business Services Ltd | Administrative & support | 2021 |
| MGO Supplies International Ltd | Wholesale & retail | 2019 |
| MGT Events Ltd | Arts & recreation | 2019 |
| Mgtor Ltd | Hospitality | 2018 |
| Mgurbz Ltd | Wholesale & retail | 2025 |
| MGX Limited | Manufacturing | 2009 |
| MGY Limited | Extraterritorial | 2022 |
| MH Clever Ways Ltd | Wholesale & retail | 2025 |
| MH Enterprises (YAS) Ltd | Wholesale & retail | 2026 |
| MH Global Limited | Wholesale & retail | 2022 |
| MH Industrial Automation Ltd | Manufacturing | 2025 |
| MH Mech Limited | Professional & scientific | 2020 |
| MH PR Limited | Professional & scientific | 2018 |
| MH Security Consultants Ltd | Other services | 2019 |
| MH Whiteglow Limited | Other services | 2025 |
| Mh's Network Limited | Information & communication | 2021 |
| MH1 Consultancy Limited | Administrative & support | 2018 |
| MH5 Ltd | Professional & scientific | 2015 |
| MHA59 Ltd | Administrative & support | 2017 |
| Mhanson Fundraising Limited | Information & communication | 2019 |
| MHK Outlet Ltd | Wholesale & retail | 2025 |
| Mhkl Global Ltd | Wholesale & retail | 2024 |
| MHM Property Limited | Construction | 2020 |
| MHM Property Wales Ltd | Real estate | 2022 |
| Mhometechglobal Ltd | Wholesale & retail | 2023 |
| MHQ UK Ltd | Hospitality | 2019 |
| Mhre Property Ltd | Real estate | 2025 |
| Mhsm Limited | Professional & scientific | 2019 |
| MHW Trading Limited | Transport & logistics | 2023 |
| MI & Forelasning Limited | Extraterritorial | 2022 |
| MI and MAY Properties Ltd | Hospitality | 2026 |
| MI Community Services Ltd | Other services | 2024 |
| MI Core Fitness Ltd | Wholesale & retail | 2014 |
| MI Love Essentials Ltd | Wholesale & retail | 2017 |
| MI Supply Chain Trading Co., Ltd | Extraterritorial | 2019 |
| MIA Kids Ltd | Wholesale & retail | 2025 |
| Miablox Ltd | Wholesale & retail | 2025 |
| Miacha Ltd | Wholesale & retail | 2026 |
| Miacleaningservices Ltd | Administrative & support | 2025 |
| Miah R Properties Ltd | Real estate | 2024 |
| Miah RM Limited | Health & social care | 2020 |
| Miami Bottd Ltd | Wholesale & retail | 2025 |
| Mian Solutions Limited | Health & social care | 2016 |
| Mian Zafar & Co. UK Ltd | Wholesale & retail | 2024 |
| Mianfinds Limited | Wholesale & retail | 2025 |
| Miaoziq Ltd | Wholesale & retail | 2025 |
| Miarume Ltd | Real estate | 2024 |
| Miatec E-Commerce Ltd | Wholesale & retail | 2025 |
| Miato Services Limited | Administrative & support | 2006 |
| MIB International Construction Ltd | Construction | 2017 |
| MIC Building and Property Maintaince Limited | Construction | 2021 |
| Mica Richards Limited | Extraterritorial | 2026 |
| Micallef Investments Ltd | Real estate | 2019 |
| Micasa Furniture Ltd | Wholesale & retail | 2026 |