| Moda Bella Ltd | Wholesale & retail | 2026 |
| Modren Kitchens and BED Rooms Limited | Wholesale & retail | 2021 |
| MOH F Printers UK Ltd | Professional & scientific | 2025 |
| Moienmahmood Limited | Professional & scientific | 2019 |
| MON Dessert Limited | Hospitality | 2015 |
| Money Post Limited | Extraterritorial | 2017 |
| Monsta Media Lancashire Ltd | Professional & scientific | 2025 |
| Montford (35) Limited | Financial services | 2018 |
| Moon Line Autos Ltd | Wholesale & retail | 2026 |
| Moon Ventures Ltd | Manufacturing | 2018 |
| Moor Retail Co Limited | Wholesale & retail | 2025 |
| Moorby Electrical Ltd | Construction | 2022 |
| Moorland Support & Care Ltd | Health & social care | 2026 |
| Mopzilla Cleaners Ltd | Administrative & support | 2025 |
| More EAT Limited | Hospitality | 2025 |
| Morgan Sterling Finance Limited | Professional & scientific | 2001 |
| Morow Limited | Professional & scientific | 2011 |
| Mosojee Properties Limited | Real estate | 2024 |
| MOTIV8 Hub Ltd | Wholesale & retail | 2025 |
| Moto Technica Limited | Wholesale & retail | 2021 |
| Motolux Cars Ltd | Wholesale & retail | 2025 |
| Motor Care Repair Ltd | Wholesale & retail | 2025 |
| Motor Express North West Ltd | Wholesale & retail | 2019 |
| Motorrelay Ltd | Information & communication | 2025 |
| Motors Shop Limited | Wholesale & retail | 2025 |
| MOTORS4UK Ltd | Wholesale & retail | 2024 |
| Motorstyling Ltd | Wholesale & retail | 2025 |
| Motorwares Limited | Wholesale & retail | 2026 |
| Move Haus Ltd | Transport & logistics | 2026 |
| Movers Nationwide Ltd | Transport & logistics | 2021 |
| MR Chef 1 Ltd | Professional & scientific | 2026 |
| MR G Cork Applicator Ltd | Construction | 2020 |
| MR Jewellers 28 Limited | Manufacturing | 2025 |
| MRB Trading Ltd | Other services | 2020 |
| MRH Advisory Limited | Professional & scientific | 2025 |
| MRK1 Ltd | Construction | 2025 |
| MS Essentialz Ltd | Wholesale & retail | 2025 |
| MS Legacy Limited | Transport & logistics | 2022 |
| MS Orders Ltd | Transport & logistics | 2020 |
| MS Sofa Studio Ltd | Manufacturing | 2026 |
| MSA Orthodontics Ltd | Professional & scientific | 2021 |
| MSA Pharma Ltd | Health & social care | 2012 |
| MSF Assist Limited | Professional & scientific | 2016 |
| Msingi Research Ltd | Administrative & support | 2015 |
| MSL Property Group Ltd | Real estate | 2026 |
| MSM Assets Ltd | Financial services | 2017 |
| MSM Fabrications Ltd | Manufacturing | 2002 |
| MSM Property Ltd | Real estate | 2012 |
| MSW Fire Safety Consultants Ltd | Public administration | 2025 |
| MT PCS Ltd | Wholesale & retail | 2025 |
| MT Repairs Ltd | Wholesale & retail | 2016 |
| MT Systems Ltd | Information & communication | 2026 |
| Mtegrate Ltd | Wholesale & retail | 2018 |
| MUB Group Ltd | Administrative & support | 2022 |
| Mucom Properties Limited | Real estate | 2025 |
| Muddleit Limited | Wholesale & retail | 2006 |
| Mughal Real Estate Ltd | Real estate | 2021 |
| Mujaw Properties Ltd | Real estate | 2021 |
| Mukhay Limited | Wholesale & retail | 2025 |
| Mulligan FT Limited | Information & communication | 2015 |
| Multi Resource Ltd | Administrative & support | 2019 |
| Mund Express Limited | Transport & logistics | 2018 |
| Muraf Ltd | Wholesale & retail | 2020 |
| Murka Beauty Limited | Other services | 2025 |
| Murphy Auto Car Parts Ltd | Wholesale & retail | 2024 |
| MVK Group Ltd | Financial services | 2020 |
| MW Joinery Limited | Construction | 2002 |
| MW Landscapes & Design Ltd | Construction | 2023 |
| MW Landscapes Limited | Construction | 2024 |
| My Burger Bay North West Ltd | Hospitality | 2025 |
| My Choice Blinds Ltd | Wholesale & retail | 2022 |
| My Dresser Ltd | Extraterritorial | 2019 |
| My IT Consultancy Ltd | Information & communication | 2020 |
| My IT Group Ltd | Financial services | 2024 |
| MYA Bargains Ltd | Wholesale & retail | 2026 |
| Myan Partnership Limited | Real estate | 2010 |
| Mycloudit Ltd | Wholesale & retail | 2021 |
| Mydealdiscount Ltd | Wholesale & retail | 2025 |
| Mynas Care Ltd | Health & social care | 2023 |
| MZH Property Management Limited | Real estate | 2025 |
| N a Autos Limited | Wholesale & retail | 2026 |
| N a Home Improvement Limited | Construction | 2025 |
| N a U Services Limited | Transport & logistics | 2016 |
| N I Capital (NW) Limited | Real estate | 2018 |
| N I Constructions (NW) Limited | Construction | 2012 |
| N P Sher Limited | Health & social care | 2003 |
| N V M Holdings Limited | Extraterritorial | 2007 |
| N.A.S.C.R UK 2022 Ltd | Arts & recreation | 2021 |
| N3XUS Ltd | Wholesale & retail | 2023 |
| NA Travel Ltd | Transport & logistics | 2024 |
| Naadz Ice Cream Delights Limited | Manufacturing | 2022 |
| Nabos Btrading Limited | Wholesale & retail | 2013 |
| Nagyaal Property Portfolio Ltd | Real estate | 2025 |
| Naik Gems Limited | Education | 2026 |
| Naila Masood Limited | Professional & scientific | 2019 |
| Nails by Asmah Ltd | Other services | 2024 |
| Nakache Limited | Administrative & support | 2020 |
| Nalt Ltd | Information & communication | 2026 |
| Nambook Limited | Other services | 2020 |
| Nambook Services Limited | Other services | 2020 |