| Midlands Ground Tech Limited | Wholesale & retail | 2026 |
| Midlands Healthcare Solutions (MHS) Ltd | Health & social care | 2009 |
| Midlands Heat Elite Limited | Construction | 2024 |
| Midlands Homecare Limited | Financial services | 2021 |
| Midlands Inventory and Cleaning Services Ltd | Households | 2026 |
| Midlands Investment Specialists Limited | Real estate | 2019 |
| Midlands Kitchen & Bedroom Suppliers Ltd. | Manufacturing | 2015 |
| Midlands Living UK Ltd | Hospitality | 2025 |
| Midlands Minibuses Ltd | Transport & logistics | 2025 |
| Midlands Motorsports Limited | Wholesale & retail | 2015 |
| Midlands Optical Enterprises Limited | Wholesale & retail | 2018 |
| Midlands Plastering Services Ltd | Construction | 2021 |
| Midlands Premium Homes Ltd | Real estate | 2023 |
| Midlands Property Collective Ltd | Construction | 2026 |
| Midlands Property Developers Limited | Construction | 2016 |
| Midlands Property Group Limited | Wholesale & retail | 2017 |
| Midlands Property Renovations Limited | Construction | 2025 |
| Midlands Property Solutions Ltd | Real estate | 2020 |
| Midlands Property Specialists Limited | Real estate | 2019 |
| Midlands Protection (MPS) Limited | Administrative & support | 2022 |
| Midlands Real Estate Ltd | Real estate | 2021 |
| Midlands Recovery and Rescue Limited | Transport & logistics | 2025 |
| Midlands Resin Designs Ltd | Construction | 2024 |
| Midlands Road Marking Ltd | Construction | 2018 |
| Midlands Road Surfacing Ltd | Construction | 2023 |
| Midlands Roller Arena Ltd | Arts & recreation | 2022 |
| Midlands School for Performing Arts and Media Ltd | Arts & recreation | 2019 |
| Midlands School of Innovative Learning Ltd | Education | 2023 |
| Midlands Short Stay Limited | Hospitality | 2022 |
| Midlands Solutions Ltd | Transport & logistics | 2026 |
| Midlands Storage & Distribution Ltd | Transport & logistics | 2009 |
| Midlands Support Services Ltd | Other services | 2023 |
| Midlands Vascular Ltd | Health & social care | 2021 |
| Midlands Vision Ltd | Information & communication | 2025 |
| Midoak Scheme Administrators Ltd | Financial services | 2025 |
| Midoak Ssas Ltd | Financial services | 2025 |
| Midoak Trustees Ltd | Financial services | 2025 |
| Midoil Holdings Ltd | Financial services | 2024 |
| Midori Aluminium Ltd | Manufacturing | 2019 |
| Midoumi Limited | Hospitality | 2024 |
| Midpoint Security Systems Ltd | Administrative & support | 2019 |
| Midsys IT Limited | Information & communication | 2013 |
| Mieh Property Ltd | Real estate | 2019 |
| MIF Ltd | Manufacturing | 2017 |
| Mifa Care Ltd | Health & social care | 2025 |
| Miftra Care and Service Ltd | Administrative & support | 2025 |
| Might Healthcare Limited | Health & social care | 2021 |
| Mighty Big Data Limited | Information & communication | 2020 |
| Mighty Oaks Nursery Ltd | Education | 2018 |
| Mighty Sharp Investments Ltd | Real estate | 2025 |
| Miguva Ltd | Wholesale & retail | 2025 |
| MIH Accessories Ltd | Wholesale & retail | 2013 |
| MIH Formation Ltd | Wholesale & retail | 2022 |
| MIH Zone Ltd | Wholesale & retail | 2022 |
| Mihai Spedition Ltd | Transport & logistics | 2018 |
| Miiam (UK) Ltd | Wholesale & retail | 2013 |
| Miina Books Limited | Wholesale & retail | 2020 |
| Miinachi Ltd | Wholesale & retail | 2018 |
| Mijr Properties Limited | Real estate | 2018 |
| Mikael Medicals Ltd | Health & social care | 2021 |
| Mikarion Technologies Ltd | Information & communication | 2025 |
| Mike Davey Mortgage Services Limited | Financial services | 2024 |
| Mike James Sports Management Ltd | Arts & recreation | 2013 |
| Mike T Transport Ltd | Transport & logistics | 2015 |
| Mike Transport Ltd | Transport & logistics | 2014 |
| Mike Wardle Associates Ltd | Professional & scientific | 2009 |
| Mikelen Property Ltd | Real estate | 2013 |
| Mikes Sweet Stop Ltd | Wholesale & retail | 2021 |
| Mikhil Kotecha Limited | Real estate | 2021 |
| Mikp Ltd | Construction | 2025 |
| Mil-Tec Services UK Ltd | Professional & scientific | 2025 |
| Mila Mali Limited | Real estate | 2016 |
| Miladu Trans Ltd | Transport & logistics | 2016 |
| Milan Catering & Events Ltd | Hospitality | 2016 |
| Milan DI Damao Limited | Hospitality | 2020 |
| Milan Properties Ltd | Real estate | 2013 |
| Milan's Dhosa Express Limited | Hospitality | 2009 |
| Milan's Properties Ltd | Real estate | 2019 |
| Milann Properties Limited | Real estate | 2025 |
| Milano Fashion Ltd | Manufacturing | 2021 |
| Milano PL Ltd | Wholesale & retail | 2015 |
| Milano Spa Ltd | Other services | 2026 |
| Milano’S Signature Limited | Wholesale & retail | 2026 |
| Milban Limited | Wholesale & retail | 2018 |
| Milbi Care Services Ltd | Health & social care | 2025 |
| Milborrow Animal Health Limited | Other services | 2012 |
| Milbright Cleaning Services Ltd | Administrative & support | 2026 |
| Milby Amazing Ltd | Hospitality | 2015 |
| Milc Designs Ltd | Professional & scientific | 2026 |
| Mileage Motors Ltd | Wholesale & retail | 2025 |
| Milechoice Limited | Manufacturing | 1991 |
| Miles Ahead Logistics Ltd | Transport & logistics | 2025 |
| Miles Audio Limited | Information & communication | 2012 |
| Miles Management Services Limited | Information & communication | 2025 |
| Miles Platts Limited | Manufacturing | 1973 |
| MILES76 Limited | Professional & scientific | 2025 |
| Milestone Leicester Ltd | Manufacturing | 2020 |
| Milestone Wealth Ltd | Financial services | 2017 |
| Mileway Construction Ltd | Construction | 2026 |
| Miliya Properties Ltd | Real estate | 2018 |