| Minster Court Management (Liverpool) Company Limited | Households | 1983 |
| Minster Rentals Limited | Real estate | 2026 |
| Mint Concept Ltd | Real estate | 2018 |
| Mint Textile Limited | Manufacturing | 2022 |
| Minter Madness Limited | Information & communication | 2024 |
| Minto Lettings Ltd | Real estate | 2024 |
| Minvale Consulting Limited | Other services | 2017 |
| Mio's Townsend Supermarket Limited | Wholesale & retail | 2021 |
| Mion Kids Collection. 2 Ltd | Wholesale & retail | 2026 |
| Mir's Group Ltd | Real estate | 2016 |
| Mirabelle Solutions Ltd | Health & social care | 2025 |
| Miragic Ltd | Wholesale & retail | 2025 |
| Miramar Investments (Holdings) Limited | Financial services | 2014 |
| Mirani 11 Ltd | Transport & logistics | 2025 |
| Mirch Masala Waterloo Ltd | Hospitality | 2024 |
| Mirch Massala Nice Foods Ltd | Hospitality | 2022 |
| Mirha Ecom Ltd | Wholesale & retail | 2024 |
| Miriam Malanda Ultrasound Services Ltd | Health & social care | 2025 |
| Miriam Rowe Ltd | Professional & scientific | 2016 |
| Miris Archway Limited | Real estate | 2021 |
| Miris International Limited | Administrative & support | 2011 |
| Mirra Kitchens & Interiors Ltd | Construction | 2025 |
| Mirror Earth Ltd | Information & communication | 2021 |
| Mirror Group Music Limited | Extraterritorial | 1995 |
| Mirror Group Newspapers Limited | Extraterritorial | 1990 |
| Mirror ME World Ltd | Manufacturing | 2025 |
| Mirror Mirror UK Ltd | Wholesale & retail | 2003 |
| Mirrorgroup Limited | Extraterritorial | 2011 |
| Mirus Building Solutions Ltd | Construction | 2023 |
| Mirzaoglu Ltd | Hospitality | 2021 |
| Misc Catering Ltd | Hospitality | 2019 |
| Miscusi UK Ltd | Hospitality | 2021 |
| Misfits Management UK Limited | Wholesale & retail | 2014 |
| Misfits Properties Limited | Real estate | 2018 |
| Mishmash Ltd | Hospitality | 2019 |
| Miss A'S Dance Company Ltd | Education | 2021 |
| Miss AMY C Limited | Professional & scientific | 2014 |
| Miss Cartel HQ Ltd | Wholesale & retail | 2023 |
| Miss Clares Dance School Ltd | Administrative & support | 2017 |
| Miss Francesca Couture Ltd | Wholesale & retail | 2010 |
| Miss M. Beauty Ltd | Other services | 2021 |
| Miss Management Events Limited | Administrative & support | 2017 |
| Miss Mollie Entertainment & Events Ltd | Arts & recreation | 2026 |
| Miss Paradis Ltd | Wholesale & retail | 2019 |
| Miss PHO Ltd | Hospitality | 2021 |
| Miss Skin Official Ltd | Wholesale & retail | 2025 |
| Missieki Martin Limited | Professional & scientific | 2014 |
| Mission in the Economy | Other services | 2004 |
| Mission Service Solutions Limited | Construction | 2009 |
| Mission Success Ltd | Administrative & support | 2019 |
| MISSION1000 Ltd | Information & communication | 2026 |
| Missionneed Limited | Other services | 2007 |
| Mista BIT Painting & Decorating Ltd | Construction | 2025 |
| Mister D’S Mind Mastery Limited | Education | 2024 |
| Mistermunro Ltd | Arts & recreation | 2014 |
| Mistry Family Property Holdings Ltd | Real estate | 2023 |
| Miszkiel Limited | Transport & logistics | 2015 |
| Mita Developments Ltd | Construction | 2023 |
| Mitchell Charlesworth (Audit) Limited | Professional & scientific | 2022 |
| Mitchell Charlesworth (Services) Limited | Administrative & support | 1980 |
| Mitchell Holt Limited | Professional & scientific | 2015 |
| Mitchell Industries Group Limited | Financial services | 2025 |
| Mitchell Industries Limited | Construction | 2018 |
| Mitchell James Asset Management Limited | Real estate | 2000 |
| Mitchell Properties (Northwest) Ltd | Construction | 2015 |
| Mitchells Executive Travel Ltd | Transport & logistics | 2025 |
| Mitchells Window Tinting Limited | Administrative & support | 2017 |
| Mitchy Titch Limited | Other services | 2015 |
| Mitcom-Electronic Ltd | Administrative & support | 2010 |
| Mithraes Ltd | Real estate | 2006 |
| Mithras Health Solution Ltd. | Wholesale & retail | 2024 |
| Mito Bar Limited | Hospitality | 2023 |
| Mitra NW Ltd | Wholesale & retail | 2025 |
| Mitrudelivery Ltd | Transport & logistics | 2025 |
| Mitsaras Limited | Hospitality | 2025 |
| Mitton Estates Ltd | Construction | 2019 |
| Mitziglo Ltd | Other services | 2020 |
| Mitzvot Ltd | Wholesale & retail | 2022 |
| MIU Transport Ltd | Transport & logistics | 2018 |
| Miveck Care Ltd | Other services | 2019 |
| Miveld Property Limited | Administrative & support | 2025 |
| MIX Media Player Ltd | Wholesale & retail | 2025 |
| MIX Mexican Ltd | Hospitality | 2025 |
| MIX Moore Concrete Limited | Construction | 2016 |
| Mixed Signals Ltd | Wholesale & retail | 2025 |
| Mixer Transport Limited | Transport & logistics | 2015 |
| Miyuki Ltd | Wholesale & retail | 2025 |
| Mizizi NW Limited | Hospitality | 2022 |
| Mizos Apparel Limited | Wholesale & retail | 2020 |
| Mizzling Limited | Hospitality | 2024 |
| MJ Audio Ltd | Information & communication | 2019 |
| MJ Convenience Store Ltd | Wholesale & retail | 2026 |
| MJ Cubed Ltd | Real estate | 2019 |
| MJ Fitness Ltd | Other services | 2023 |
| MJ Freeman Properties Limited | Real estate | 2025 |
| MJ Investments Ltd | Real estate | 2019 |
| MJ Newsagent Ltd | Wholesale & retail | 2025 |
| MJ Power Ltd | Transport & logistics | 2019 |
| MJ Properties (Liverpool) Limited | Real estate | 2011 |
| MJ Renshaw Ltd | Hospitality | 2018 |