| MSS Car Sales Limited | Wholesale & retail | 2025 |
| MSS Liverpool Limited | Administrative & support | 2018 |
| MSS Management Services Ltd | Professional & scientific | 2025 |
| MST House Ltd | Real estate | 2026 |
| MST Invest Group Ltd | Real estate | 2024 |
| MST Leisure Group Ltd | Hospitality | 2024 |
| MST Sports Tours Ltd | Administrative & support | 2023 |
| Msta Training Limited | Education | 2019 |
| MSUK68 Ltd | Other services | 2007 |
| MSW Consultants Limited | Construction | 2020 |
| MSW Services Limited | Administrative & support | 2003 |
| MT Asset Holdings Ltd | Professional & scientific | 2024 |
| MT Family Investment Company Limited | Professional & scientific | 2026 |
| MT Football Ltd | Education | 2022 |
| MT Property Management Services Ltd | Administrative & support | 2023 |
| MT Real Runner Limited | Transport & logistics | 2020 |
| MT Sefton Limited | Hospitality | 2025 |
| MT Wealth Ltd | Administrative & support | 2016 |
| MTB (NW) Ltd | Professional & scientific | 2008 |
| Mtbm 24/7 Ltd | Construction | 2025 |
| MTC Building Solutions Limited | Construction | 2025 |
| MTC Empresa Ltd | Information & communication | 2014 |
| MTC Homes Limited | Construction | 2021 |
| MTC Sleep Service Limited | Health & social care | 2023 |
| MTC Truck & Van Rental Ltd | Administrative & support | 2021 |
| MTC UK Group Limited | Financial services | 2021 |
| MTC Waste Limited | Wholesale & retail | 2021 |
| Mtec Electrical Ltd | Construction | 2014 |
| Mtec Safety & Compliance Ltd | Professional & scientific | 2026 |
| Mtech International Ltd | Information & communication | 2002 |
| Mtge Financial Services Ltd | Financial services | 2019 |
| Mthing Ltd | Administrative & support | 2022 |
| Mthr Consultancy Ltd | Administrative & support | 2026 |
| MTJ Investments Ltd | Administrative & support | 2020 |
| MTK Renovations Limited | Construction | 2023 |
| MTM Groundworks Ltd | Construction | 2022 |
| MTN Transport Limited | Transport & logistics | 2014 |
| MTO Ltd | Transport & logistics | 2025 |
| MTP Creative Solutions Ltd | Information & communication | 2025 |
| MTR Group Dispatch Ltd | Transport & logistics | 2020 |
| MTR Pipe Services Ltd | Manufacturing | 2023 |
| MTR Residential Limited | Real estate | 2018 |
| MTS Liverpool Limited | Real estate | 2021 |
| MTS PVT Limited | Wholesale & retail | 2025 |
| MTT Property Developments Limited | Real estate | 2023 |
| Mu-Co Mobile Barber Ltd | Other services | 2020 |
| Muala Ltd | Wholesale & retail | 2025 |
| Muasrt PVT Ltd | Wholesale & retail | 2020 |
| Much Woolton Old School Nursery Limited | Education | 2022 |
| Muddy Footprints Liverpool Ltd | Education | 2015 |
| Muddy Goose Productions Ltd | Hospitality | 2022 |
| Mudi the Barber Ltd | Other services | 2025 |
| Mudodo Consulting Ltd | Health & social care | 2024 |
| Muffin Games Limited | Information & communication | 2011 |
| Mughal Delivery Ltd | Hospitality | 2017 |
| Muhammad Mudassar Ltd | Wholesale & retail | 2025 |
| Muhammad Sufyan 786 Ltd | Wholesale & retail | 2025 |
| Muhammad Waqar Ltd | Wholesale & retail | 2025 |
| Muhammad Waseem 786 Ltd | Wholesale & retail | 2025 |
| Muirhead Avenue Property Limited | Real estate | 2021 |
| Mukfvu Zxgds Ltd | Wholesale & retail | 2025 |
| Mulanda First of ALL Limited | Health & social care | 2015 |
| Mulberry (Huyton) Management Company Limited | Professional & scientific | 2008 |
| Mulberry Vale Consultants Ltd | Professional & scientific | 2023 |
| Mulberry Workshop Ltd | Professional & scientific | 2020 |
| Mulberry's Farm Camping and Caravanning Ltd | Hospitality | 2025 |
| Mulholland Investment Group Ltd | Construction | 2026 |
| Mullally Electrical Contractors Ltd | Construction | 2010 |
| Mullally's Properties Limited | Real estate | 2019 |
| Mulligans Bar Liverpool Ltd | Hospitality | 2022 |
| Mulligans Construction Contractors Ltd | Construction | 2025 |
| Mulrankin Management Limited | Hospitality | 1983 |
| Multi Channel Logistics Ltd | Transport & logistics | 2020 |
| Multi- FIX Civils Limited | Construction | 2025 |
| Multi-Fix Construction Limited | Manufacturing | 2017 |
| Multi-Surface Spray Ltd | Construction | 2026 |
| Multi-Track Facilities C.I.C. | Construction | 2020 |
| Multibase Enterprises Limited | Other services | 2001 |
| Multidiagnostics Ltd | Administrative & support | 2015 |
| Multiglazing Holdings Limited | Financial services | 2024 |
| Multiko Limited | Other services | 2007 |
| Multilink Broadcast Limited | Information & communication | 2011 |
| Multimedia Center Limited | Other services | 2025 |
| Multiskills Healthcare Ltd | Health & social care | 2026 |
| MUM Knows Best Productions Ltd | Arts & recreation | 2023 |
| MUM of 4 Family Meals Ltd | Wholesale & retail | 2026 |
| Muma Studio Ltd | Information & communication | 2025 |
| Mumbai Street Food Ltd | Hospitality | 2021 |
| Mumbod Limited | Health & social care | 2021 |
| Muna Properties Ltd | Real estate | 2025 |
| Munashe Healthcare Limited | Public administration | 2018 |
| Mundy Brothers Limited | Real estate | 2024 |
| Mundy Property Holdings Limited | Real estate | 2022 |
| Muni-Serv (Hire) Ltd | Manufacturing | 2010 |
| Munir Ahmad Ltd | Wholesale & retail | 2025 |
| Munn Telecoms Ltd | Information & communication | 2018 |
| Muram Ltd | Professional & scientific | 2017 |
| Murando Ltd | Real estate | 2024 |
| Murano Pizza Ltd | Hospitality | 2024 |
| Murco Properties N/W Limited | Real estate | 2020 |