| MF Car Sales Limited | Wholesale & retail | 2026 |
| MF Meher Group Ltd | Hospitality | 2026 |
| MF News Ltd | Wholesale & retail | 2023 |
| MFM Unit Trust Managers Limited | Financial services | 1982 |
| MFN Pharma Ltd | Wholesale & retail | 2021 |
| MFP Dental Ltd | Health & social care | 2019 |
| MFP Electrical Contractors Ltd | Construction | 2016 |
| MFP Holding Group Limited | Other services | 2021 |
| Mfprop Limited | Real estate | 2017 |
| MFT Consultancy Ltd | Professional & scientific | 2025 |
| Mfyap Properties Ltd | Construction | 2023 |
| MG Home Improvements (UK) Limited | Other services | 2003 |
| MG Houghton Limited | Professional & scientific | 2026 |
| MG National Services Ltd | Transport & logistics | 2024 |
| MG Optometry Ltd | Health & social care | 2024 |
| MG Safe Car Park Limited | Transport & logistics | 2021 |
| MG Social Solutions Ltd | Health & social care | 2025 |
| MG Transformation Consulting Limited | Information & communication | 2021 |
| MGA IT Recruitment Limited | Administrative & support | 2009 |
| MGC Solutions Ltd | Transport & logistics | 2021 |
| Mgfba Ltd | Wholesale & retail | 2024 |
| Mggs Pro Ltd | Wholesale & retail | 2025 |
| MGH Properties GH Ltd | Real estate | 2026 |
| MGH Services Ltd | Other services | 2017 |
| MGH Solutions Ltd | Information & communication | 2011 |
| Mghv Services Ltd | Construction | 2019 |
| MGI Arena Group Limited | Information & communication | 2023 |
| MGI Arena Manchester Limited | Information & communication | 2023 |
| MGI Arena Properties Limited | Financial services | 2023 |
| MGI Arena UK Limited | Construction | 2023 |
| Mglh Developments Ltd | Construction | 2024 |
| MGM Electrical Services Limited | Construction | 2007 |
| MGP Wealth Ltd | Real estate | 2022 |
| MGR Healthcare Ltd. | Health & social care | 2018 |
| Mgst Ltd | Real estate | 2024 |
| MH (Preston) Ltd | Hospitality | 2024 |
| MH Accountants Group Ltd | Administrative & support | 2025 |
| MH Bolton Ltd | Hospitality | 2020 |
| MH Building Solutions Ltd | Construction | 2024 |
| MH Cladding Services Ltd | Construction | 2024 |
| MH Couriers Services Ltd | Transport & logistics | 2017 |
| MH Grounds and Property Maintenance Limited | Construction | 2018 |
| MH Hair and Beauty Ltd | Wholesale & retail | 2014 |
| MH Newco Limited | Professional & scientific | 2021 |
| MH Topco Limited | Professional & scientific | 2011 |
| MH2 Optics Limited | Health & social care | 2010 |
| MH2 Properties Ltd | Real estate | 2022 |
| MHA Guard Security Ltd | Financial services | 2024 |
| Mhanp Limited | Health & social care | 2020 |
| Mhbs (NW) Ltd | Real estate | 2024 |
| MHC PCP Limited | Administrative & support | 2021 |
| Mhca Accountancy Ltd | Professional & scientific | 2020 |
| MHD Vision Limited | Health & social care | 2017 |
| MHE Labs Ltd | Professional & scientific | 2026 |
| Mhhc Ltd | Professional & scientific | 2025 |
| Mhhs Holding Limited | Financial services | 2025 |
| MHI Optical Ltd | Health & social care | 2015 |
| Mhij Ltd | Real estate | 2020 |
| MHM Courier Ltd | Transport & logistics | 2025 |
| MHM Holdings Ltd | Administrative & support | 2020 |
| MHP Finance Limited | Professional & scientific | 1999 |
| MHP Locum Limited | Health & social care | 2014 |
| MHR Consultants Ltd | Administrative & support | 2025 |
| MHS Bolton Ltd | Real estate | 2015 |
| MHS Cars Ltd | Administrative & support | 2026 |
| MHS Propco Limited | Education | 2017 |
| MHT Barrow Limited | Construction | 2023 |
| MHW 63 Ltd | Professional & scientific | 2016 |
| MI Assessors Ltd | Wholesale & retail | 2019 |
| MI Body Shop Ltd | Wholesale & retail | 2025 |
| MI Brickwork Ltd | Construction | 2022 |
| MI Cafe Trading Co. Ltd | Wholesale & retail | 2022 |
| MI Essentials Limited | Wholesale & retail | 2022 |
| MI Haulage Limited | Transport & logistics | 2016 |
| MI Investment Circle Ltd | Real estate | 2024 |
| MI My Stores Ltd | Wholesale & retail | 2025 |
| MI Resources Limited | Administrative & support | 2020 |
| MI Retail Group Ltd | Wholesale & retail | 2026 |
| MI Ventures Ltd | Construction | 2021 |
| MI4 Ltd | Arts & recreation | 2026 |
| MIA & Mare Ltd | Wholesale & retail | 2025 |
| MIA Capital Ltd | Real estate | 2025 |
| Miami Sun Centre Limited | Other services | 2012 |
| Mian Communication Ltd | Wholesale & retail | 2020 |
| Mian Traders PK Ltd | Wholesale & retail | 2023 |
| MIB Traders Ltd | Construction | 2018 |
| Mice Concierge Limited | Hospitality | 2012 |
| Michael Barnes Financial Services Ltd | Administrative & support | 2009 |
| Michael Boland Holding Ltd | Financial services | 2025 |
| Michael Cunniff Ltd | Professional & scientific | 2012 |
| Michael Dean Construction Ltd | Construction | 2026 |
| Michael Goodman Ltd | Real estate | 2021 |
| Michael Hyde & Associates Limited | Professional & scientific | 1974 |
| Michael James Vending and Disposables Limited | Wholesale & retail | 1988 |
| Michael Lopez Ltd | Administrative & support | 2023 |
| Michael Rose & Baylis Limited | Administrative & support | 2014 |
| Michael Sohor & Co Limited | Professional & scientific | 2002 |
| Michaelnco Limited | Hospitality | 2023 |
| Michelini Real Estate Limited | Real estate | 2025 |
| Michoba Ltd | Information & communication | 2023 |