| Millgate Studios Ltd | Professional & scientific | 2012 |
| Milliez Limited | Hospitality | 2022 |
| Millrace Electrical Ltd | Construction | 2022 |
| Mills Initiatives Limited | Real estate | 1996 |
| Milnrow Cricket Club Hospitality Limited | Hospitality | 2024 |
| Milnrow Cricket Club Limited | Arts & recreation | 2024 |
| Milnrow Investments Limited | Real estate | 2006 |
| Milnrow Motor Company Ltd | Wholesale & retail | 2008 |
| Milnrow Pre-School CIC | Education | 2023 |
| Milnrow Properties Limited | Construction | 1993 |
| Milnrow Road Diner Ltd | Hospitality | 2025 |
| Milnrow Star Ltd | Wholesale & retail | 2026 |
| Mimoe Jams Limited | Hospitality | 2019 |
| Minal-Izyan Limited | Wholesale & retail | 2025 |
| Mindsols Ltd | Information & communication | 2025 |
| Minero FX Ltd | Financial services | 2025 |
| Mini and Mama Books Ltd | Wholesale & retail | 2024 |
| Mini Scents Ltd | Manufacturing | 2025 |
| Minimarg Ltd | Wholesale & retail | 2024 |
| Mint Smiles Limited | Health & social care | 2023 |
| Mint Smiles Products Limited | Wholesale & retail | 2026 |
| Miqat Umrah Ltd | Administrative & support | 2025 |
| MIR Analytical Services Ltd | Professional & scientific | 2025 |
| MIR Arcadia Limited | Information & communication | 2013 |
| MIR Interntional Trading Inc Ltd | Other services | 2021 |
| Miraso Ltd | Wholesale & retail | 2025 |
| Mirza Enterprises 83 Ltd | Wholesale & retail | 2024 |
| Mirza Farm Limited | Agriculture & fishing | 2024 |
| MIS (NW) Ltd | Hospitality | 2018 |
| Misbah Optical Ltd | Health & social care | 2024 |
| Miss DEE First Ltd | Wholesale & retail | 2025 |
| Miss DEE Ltd | Wholesale & retail | 2024 |
| Miss Personalised Ltd | Wholesale & retail | 2023 |
| Mission (Rochdale) Limited | Manufacturing | 2009 |
| Mission Pointers CIC | Information & communication | 2026 |
| Missqs Limited | Arts & recreation | 2018 |
| Mitchell & Mcghee Limited | Other services | 2024 |
| MJ Joinery and Developments Ltd | Construction | 2022 |
| MJ Tyson Security Ltd | Administrative & support | 2013 |
| MJA Private Limited | Transport & logistics | 2025 |
| MJD Interiors Ltd | Construction | 2018 |
| MJD Investment Holdings Limited | Financial services | 2026 |
| MJD Optical Ltd | Wholesale & retail | 2026 |
| MJH Financial Ltd | Other services | 2023 |
| MJJ Chicken Ltd | Hospitality | 2024 |
| Mjoma Limited | Wholesale & retail | 2026 |
| MK Accountancy Services PVT Limited | Professional & scientific | 2018 |
| MK Beauty Store Ltd | Wholesale & retail | 2025 |
| MK Distributions FBA Ltd | Wholesale & retail | 2025 |
| MK Electrical Services NW Ltd | Construction | 2018 |
| MK Paving Landscape Ltd | Administrative & support | 2026 |
| MK Services PVT Limited | Professional & scientific | 2021 |
| MKT COM Services Ltd | Information & communication | 2017 |
| MKU Pharma Ltd | Health & social care | 2023 |
| MKZ Global Ltd | Administrative & support | 2019 |
| ML Motors (Heywood) Limited | Wholesale & retail | 2012 |
| ML Motors Limited | Extraterritorial | 2015 |
| MLA Properties & Lettings Ltd | Real estate | 2022 |
| MLC Corp Limited | Health & social care | 2016 |
| MLG Socials Limited | Information & communication | 2026 |
| Mlmsupplies Ltd | Wholesale & retail | 2026 |
| Mlota Testing Ltd | Information & communication | 2022 |
| MM Cargo and Logistics Limited | Transport & logistics | 2026 |
| MM2 Properties Ltd | Real estate | 2025 |
| Mmak Holdings Ltd | Financial services | 2025 |
| Mmatarise Limited | Health & social care | 2022 |
| MMR Pharma Ltd | Professional & scientific | 2014 |
| Mmsc Services Limited | Professional & scientific | 2016 |
| MMZ Homes Ltd | Manufacturing | 2025 |
| MNA Fusion Foods Ltd | Hospitality | 2025 |
| MNA Prodrive Ltd | Transport & logistics | 2020 |
| MNJ Autocare Classics Ltd | Wholesale & retail | 2024 |
| Mnlt Treasures Ltd | Wholesale & retail | 2025 |
| MO and Co Traders Ltd | Wholesale & retail | 2018 |
| MO Nadeem Ltd | Professional & scientific | 2015 |
| Mobeen Ltd | Hospitality | 2025 |
| Mobile Magician Limited | Wholesale & retail | 2012 |
| Mobile Phones 4U Limited | Information & communication | 2017 |
| Mobilise (Bidco) Limited | Financial services | 2020 |
| Mobilise (Midco 1) Limited | Financial services | 2020 |
| Mobilise (Midco 2) Limited | Financial services | 2020 |
| Mobius Hands Limited | Professional & scientific | 2017 |
| Mobixio Limited | Wholesale & retail | 2025 |
| Mobiz Drylining Finishes Ltd | Construction | 2025 |
| Mobs Deli Bar Ltd | Hospitality | 2025 |
| Mocean Trans Ltd | Transport & logistics | 2017 |
| Mode and Co AI Limited | Wholesale & retail | 2025 |
| Moderate Academy and Training Centre Ltd | Education | 2023 |
| Modern Training & Assessment Limited | Education | 2023 |
| Modesty Fashion Ltd | Wholesale & retail | 2025 |
| Modexa Ltd | Wholesale & retail | 2025 |
| Modish Collection Ltd | Wholesale & retail | 2021 |
| Modroneview Ltd | Extraterritorial | 2025 |
| Mods Eyewear Studio Ltd | Wholesale & retail | 2020 |
| Modu POD Ltd | Manufacturing | 2017 |
| Modular Extension Limited | Financial services | 2020 |
| Modular Vehicle Wraps Ltd | Manufacturing | 2025 |
| Mofast Performance Limited | Manufacturing | 2022 |
| Moglad Catering Services Ltd | Hospitality | 2022 |
| Mohammed Waqar Ahmed Ltd | Transport & logistics | 2025 |