| Miran Burger Ltd | Hospitality | 2025 |
| Mirata Limited | Information & communication | 2003 |
| Mirchi Moorends Ltd | Hospitality | 2022 |
| Mirdem Transport Ltd | Transport & logistics | 2020 |
| Mirhema Services Ltd | Administrative & support | 2026 |
| Miribell Ltd | Transport & logistics | 2025 |
| Miro Sunvolt Systems Limited | Construction | 2025 |
| Miru Vision UK Ltd | Wholesale & retail | 2026 |
| MIS Conversions Ltd | Manufacturing | 2006 |
| Misbah' Collection Ltd | Wholesale & retail | 2024 |
| Misiolek Services Ltd | Administrative & support | 2021 |
| Miss Active Trucker Ltd | Transport & logistics | 2023 |
| Miss K Super Deals Limited | Wholesale & retail | 2020 |
| Miss Tidy's Cleaning Services Limited | Administrative & support | 2025 |
| Mission 2 Thrive Limited | Education | 2026 |
| Mission Endeavour CIC | Education | 2023 |
| Mission in Property Limited | Real estate | 2023 |
| Mississippi Properties Limited | Real estate | 1983 |
| Misson Mill Ltd | Real estate | 2016 |
| Misson Pallets Services Limited | Manufacturing | 1995 |
| Misson Sand and Gravel Company Limited | Mining & quarrying | 2001 |
| Misson Springs Lamb Limited | Agriculture & fishing | 2018 |
| Misson Vehicle Services Ltd | Wholesale & retail | 2024 |
| Misstreated Ltd | Extraterritorial | 2022 |
| Misterton Area Partnership Ltd. | Professional & scientific | 2003 |
| Misterton MOT & Service Centre Limited | Extraterritorial | 2010 |
| Mistika Music Limited | Education | 2019 |
| Misto Construct Limited | Construction | 2025 |
| Misyus Ltd | Hospitality | 2024 |
| Mitchel-Clay Building Services Limited | Construction | 2018 |
| Mitchel-Clay Building Solutions Limited | Construction | 2023 |
| Mitchell Burns Limited | Administrative & support | 2017 |
| Mitchell Doors Ltd | Manufacturing | 2021 |
| Mitchell Harworth Ltd | Real estate | 2019 |
| Mitchell Mortgages Limited | Financial services | 2021 |
| Miti Solutions Ltd | Transport & logistics | 2026 |
| Mitran Trans Ltd | Transport & logistics | 2018 |
| Mitt Transport Ltd | Transport & logistics | 2024 |
| Mittal Consulting Solutions Limited | Information & communication | 2023 |
| Mittrans Ltd | Transport & logistics | 2019 |
| Mitu Cars Sale Ltd | Wholesale & retail | 2022 |
| Mitza Treats Ltd | Wholesale & retail | 2024 |
| MIW Plumbing and Heating Ltd | Construction | 2020 |
| Mixelecs Limited | Wholesale & retail | 2023 |
| MJ Commerce Hub Ltd | Wholesale & retail | 2026 |
| MJ Contracts Ltd | Construction | 2022 |
| MJ Crofts Limited | Administrative & support | 2016 |
| MJ Crypto Labs Ltd | Administrative & support | 2022 |
| MJ Marketing Services Ltd | Professional & scientific | 2024 |
| MJ Online Ltd | Professional & scientific | 2012 |
| MJ Physio Ltd | Public administration | 2020 |
| MJ Vehicle Recovery Service Limited | Water & waste | 2025 |
| MJB Commercial Property Limited | Real estate | 2009 |
| MJB Finningley Limited | Financial services | 2014 |
| MJF Haulage Limited | Transport & logistics | 2016 |
| MJH Investment Services Ltd | Financial services | 2022 |
| MJK Business Ltd | Professional & scientific | 2026 |
| MJK Contactors Limited | Manufacturing | 2017 |
| MJK Electrical Contractor Services Ltd | Construction | 2025 |
| MJK Essentials Ltd | Wholesale & retail | 2025 |
| MJL Plumbgas Limited | Construction | 2024 |
| Mjlb Ltd | Health & social care | 2023 |
| Mjln TM Ltd | Public administration | 2025 |
| MJM Electrical (Yorkshire) Ltd | Construction | 2025 |
| MJP Consultancy, Coaching and Training Ltd | Professional & scientific | 2016 |
| MJP Tree Services Ltd | Administrative & support | 2025 |
| Mjpb Limited | Professional & scientific | 2017 |
| MJS Baits Ltd | Agriculture & fishing | 2014 |
| MJS Driver Services Ltd | Transport & logistics | 2024 |
| MJS Parks Limited | Real estate | 2024 |
| Mjvy Ltd | Administrative & support | 2025 |
| MJW Commercials Limited | Wholesale & retail | 2018 |
| MK Brickwork (Doncaster) Limited | Construction | 2026 |
| MK Care Solutions Ltd | Health & social care | 2025 |
| MK Market 1 Limited | Wholesale & retail | 2025 |
| MK Prime Electrical Ltd | Construction | 2019 |
| MK Prime Investments Ltd | Real estate | 2026 |
| MK Reksio Ltd | Transport & logistics | 2015 |
| MK Render Limited | Construction | 2012 |
| MK TAN Ltd | Other services | 2019 |
| MK Traders Doncaster Ltd | Wholesale & retail | 2024 |
| MK2 Lift Trucks Limited | Manufacturing | 2013 |
| MKA Acquisition Ltd | Wholesale & retail | 2022 |
| MKB Building Services Ltd | Construction | 2025 |
| Mkhu Ltd | Professional & scientific | 2014 |
| MKI Vita Trading Ltd | Wholesale & retail | 2026 |
| MKJ Brothers Limited | Transport & logistics | 2024 |
| MKJ Estate Ltd | Real estate | 2026 |
| MKK Lion NAM Limited | Hospitality | 2025 |
| MKK MAX Ltd | Transport & logistics | 2021 |
| MKM Contractors Ltd | Construction | 2014 |
| MKO R. Group Ltd | Wholesale & retail | 2026 |
| Mkrv Engineering Limited | Professional & scientific | 2019 |
| MKV Garage Ltd | Extraterritorial | 2023 |
| ML Global Instruments Limited | Wholesale & retail | 2025 |
| ML Office Wholesale Limited | Wholesale & retail | 2025 |
| ML Storage Solutions Ltd | Wholesale & retail | 2020 |
| MLB Joinery and Tiling Ltd | Construction | 2022 |
| MLC Professionals Ltd | Health & social care | 2017 |
| MLI Developments Ltd | Construction | 2024 |