| MFL Limited | Real estate | 1997 |
| MFM Airconditioning Limited | Construction | 2001 |
| Mfrs Freeholdings Ltd | Real estate | 2023 |
| Mfrs Properties Ltd | Real estate | 2022 |
| MFX Inc Limited | Arts & recreation | 2012 |
| MG Accommodation Ltd | Real estate | 2025 |
| MG Autos Bristol Ltd | Wholesale & retail | 2019 |
| MG Baltic Logistics Ltd | Transport & logistics | 2024 |
| MG Consultancy Services Limited | Education | 2024 |
| MG Estate Agents Ltd | Real estate | 2020 |
| MG Ford Holdings Ltd | Real estate | 2024 |
| MG Freestone Limited | Construction | 2018 |
| MG Paraplanning Ltd. | Administrative & support | 2017 |
| MG Stonemason Limited | Construction | 2008 |
| MG Structures Ltd | Professional & scientific | 2019 |
| MG Vintner Limited | Wholesale & retail | 2023 |
| MG12 Design Ltd | Professional & scientific | 2025 |
| MGA Electrical Services Ltd | Construction | 2024 |
| Mgan Transport Ltd | Transport & logistics | 2017 |
| MGB Investments Limited | Real estate | 2020 |
| Mgba Holdings Limited | Real estate | 2016 |
| MGC Digital Limited | Information & communication | 2019 |
| MGC Legal Solutions Ltd | Administrative & support | 2019 |
| MGC Logistics Limited | Transport & logistics | 2016 |
| Mgck Pubco Ltd | Hospitality | 2024 |
| MGE Medical Services Ltd | Professional & scientific | 2019 |
| MGF Carpentry Services Limited | Construction | 2023 |
| Mgfp Holdings Limited | Financial services | 2020 |
| MGH Consulting Ltd | Professional & scientific | 2014 |
| MGH Electrical (South West) Limited | Construction | 2016 |
| Mglab Ltd | Wholesale & retail | 2025 |
| MGM General Services Limited | Water & waste | 2007 |
| MGO Properties Limited | Real estate | 2020 |
| Mgpremier Painting & Decorating Ltd | Construction | 2022 |
| Mgps Facility Management Group Ltd | Professional & scientific | 2022 |
| Mgps Services Ltd | Professional & scientific | 2002 |
| MGS Groundworks & Construction Limited | Construction | 2025 |
| MGS Partners Ltd | Financial services | 2022 |
| Mgsales Ltd | Administrative & support | 2016 |
| Mgsconsulting Limited | Information & communication | 2025 |
| MGT Gardening Services C.I.C. | Administrative & support | 2025 |
| Mgtr Property Ltd | Real estate | 2019 |
| MGZ Media Ltd | Information & communication | 2020 |
| MGZ Property Ltd | Real estate | 2020 |
| Mgzsales Ltd | Information & communication | 2019 |
| MH Company South West Ltd | Administrative & support | 2018 |
| MH Brickwork Ltd | Manufacturing | 2019 |
| MH Building & Renovations Ltd | Construction | 2024 |
| MH Consulting and Publishing Ltd | Information & communication | 2025 |
| MH Cricket Coaching Ltd | Arts & recreation | 2022 |
| MH Eats Ltd | Hospitality | 2024 |
| MH Sash Windows Limited | Construction | 2018 |
| MH Services Bristol Ltd | Water & waste | 2023 |
| MH94CARDS Limited | Arts & recreation | 2024 |
| Mhairi Cameron Consulting Limited | Professional & scientific | 2003 |
| Mhando Ltd | Information & communication | 2021 |
| MHB Accountancy Limited | Professional & scientific | 2019 |
| MHB Accounting Services Limited | Professional & scientific | 2020 |
| MHB Bookkeeping Limited | Professional & scientific | 2021 |
| MHB Properties Bristol Limited | Real estate | 2026 |
| MHB Property Lettings and Developments Limited | Real estate | 2024 |
| MHC and Co Ltd | Professional & scientific | 2009 |
| MHC Estates and Lettings Ltd | Construction | 2024 |
| MHC Holdings Ltd | Real estate | 2025 |
| MHC Property Limited | Real estate | 2017 |
| MHI Media Ltd | Professional & scientific | 2019 |
| MHL Property Group Ltd | Real estate | 2024 |
| Mhnk Auto Solutions Limited | Wholesale & retail | 2026 |
| Mhonlinestore Ltd | Wholesale & retail | 2023 |
| MHP Services Bristol Limited | Construction | 2016 |
| MHR Manager Limited | Administrative & support | 2016 |
| Mhrc EOT Limited | Extraterritorial | 2026 |
| MHS Recruitment Ltd | Administrative & support | 2021 |
| MHT Mart Limited | Wholesale & retail | 2025 |
| Mhto Ltd | Real estate | 2022 |
| Mhuf Constructions Limited | Construction | 2025 |
| MHW Software Ltd | Information & communication | 2011 |
| MI Casa Estates Holdings Ltd | Real estate | 2025 |
| MI Casa Estates Ltd | Real estate | 2022 |
| MI Electrical Services Limited | Construction | 2025 |
| MI Facility Services Ltd | Wholesale & retail | 2024 |
| MI Motors Bristol Ltd | Wholesale & retail | 2012 |
| MI Natural Ltd | Manufacturing | 2019 |
| MI Property Group Ltd | Real estate | 2019 |
| MI Real Estate Ltd | Real estate | 2025 |
| MI Wholesales Limited | Wholesale & retail | 2014 |
| MIA MAY Ltd | Arts & recreation | 2024 |
| MIA Property Management Limited | Real estate | 2021 |
| Miaa Ltd | Hospitality | 2025 |
| Miacosa Ltd | Professional & scientific | 2023 |
| Miah's Empire Ltd | Hospitality | 2016 |
| Miami Dice Limited | Information & communication | 2025 |
| Mian Group of Companies Ltd | Wholesale & retail | 2026 |
| Mian House Ltd | Wholesale & retail | 2025 |
| Miaowito Animation Limited | Information & communication | 2025 |
| Miaris Group Limited | Professional & scientific | 2016 |
| MIC Connect Ltd | Professional & scientific | 2016 |
| Micah Services Ltd | Administrative & support | 2015 |
| Micasa Homes Ltd | Real estate | 2023 |
| Micawber Consulting Limited | Financial services | 2021 |