| Musa’S Döner Limited | Hospitality | 2022 |
| Muscle NO Hustle Ltd | Water & waste | 2023 |
| Music From Niche Ltd | Arts & recreation | 2023 |
| Music Minds UK Entertainers Ltd | Information & communication | 2022 |
| Musical Vibe Ltd | Information & communication | 2024 |
| Musk SW Ltd | Hospitality | 2025 |
| Muskam UK Ltd | Wholesale & retail | 2022 |
| Muskan Fashion Limited | Wholesale & retail | 2003 |
| Muskox Limited | Wholesale & retail | 2024 |
| Must Go Drains Ltd | Water & waste | 2020 |
| Mustafa & Sons Ltd | Wholesale & retail | 2025 |
| Mustang Logistics Limited | Transport & logistics | 2025 |
| Mustaqbill Foundation | Health & social care | 2004 |
| Muteebtaqi Brands Ltd | Wholesale & retail | 2026 |
| Mutti Construction Ltd | Construction | 2022 |
| Muugies Ltd | Real estate | 2025 |
| MUX Mart Ltd | Wholesale & retail | 2026 |
| Muzafar & Ayaan Estates Limited | Real estate | 2017 |
| Muzenda Services Ltd | Administrative & support | 2019 |
| MV (PVT) Limited | Wholesale & retail | 2026 |
| MV Accountancy Services Limited | Professional & scientific | 2017 |
| MV Properties (Surrey) Limited | Real estate | 2025 |
| MVH Building Solutions Ltd | Construction | 2005 |
| Mvijaya Limited | Real estate | 2022 |
| MVP Group Ltd | Construction | 2026 |
| MVT Solutions Ltd | Wholesale & retail | 2024 |
| MW Group Investment Ltd | Real estate | 2021 |
| MW Group Services Ltd | Transport & logistics | 2020 |
| MW Home Improvements Limited | Construction | 2020 |
| MWA Real Estate Ltd | Real estate | 2022 |
| Mwambia Ltd | Health & social care | 2017 |
| MXN Estates Ltd | Real estate | 2023 |
| My Art Agency Limited | Wholesale & retail | 2020 |
| My Barber Fade's Ltd | Other services | 2024 |
| My BIN Days Ltd | Extraterritorial | 2021 |
| My Bukhari Bukhari Ltd | Wholesale & retail | 2023 |
| My Car Care Limited | Transport & logistics | 2026 |
| My Creative Desk Ltd | Wholesale & retail | 2024 |
| My Father's House Prophetic Ministries (Slough) Ltd | Other services | 2004 |
| My Football CV Ltd | Education | 2024 |
| My Heating & Plumbing Limited | Wholesale & retail | 2023 |
| My London Mart Ltd | Wholesale & retail | 2025 |
| My Maze Consultancy Ltd | Administrative & support | 2017 |
| My Premier Properties Ltd | Real estate | 2023 |
| My Premium Lifestyle Ltd | Wholesale & retail | 2024 |
| My Property Manager Limited | Real estate | 2020 |
| My Retail Limited | Wholesale & retail | 2017 |
| My Skylights Direct Limited | Other services | 2018 |
| My Smart Green UK Limited | Construction | 2024 |
| My Smile Studios Ltd | Manufacturing | 2020 |
| My Solutionz Ltd | Professional & scientific | 2024 |
| My STORE2 Limited | Wholesale & retail | 2025 |
| My Tarbiyah Ltd | Wholesale & retail | 2022 |
| My Time for Health Ltd | Health & social care | 2025 |
| My Travel Services Limited | Transport & logistics | 2023 |
| My Univrs Ltd | Extraterritorial | 2022 |
| MYA - Rose Naturelle Hair & Beauty Limited | Other services | 2021 |
| Mybestdeal Ltd | Wholesale & retail | 2026 |
| Mybizz Ltd | Wholesale & retail | 2026 |
| Mycaafimaad Ltd | Health & social care | 2025 |
| Myco Limited | Manufacturing | 2020 |
| Mycozyhomes Ltd | Real estate | 2024 |
| Mydocify Ltd | Information & communication | 2022 |
| Myelin CHI Ltd | Arts & recreation | 2023 |
| Myhouseclearancecompany Ltd | Water & waste | 2025 |
| Myinstruktor Limited | Information & communication | 2015 |
| MYM Law Solicitors LLP | | 2025 |
| Myrastone Ltd | Wholesale & retail | 2018 |
| Mysha Solutions Ltd | Information & communication | 2012 |
| Mythic Labs Ltd | Information & communication | 2025 |
| Mytoothpaste Limited | Professional & scientific | 2000 |
| MYTRIES21 Ltd | Wholesale & retail | 2018 |
| Mywebconsultans Limited | Information & communication | 2018 |
| MZ Food Online Limited | Administrative & support | 2025 |
| MZ Holdings Limited | Real estate | 2021 |
| MZ Trading Hub Limited | Wholesale & retail | 2025 |
| MZQ Ltd | Wholesale & retail | 2022 |
| MZT Ventures Ltd | Wholesale & retail | 2024 |
| N & a Investments (London) Ltd | Real estate | 2021 |
| N & R Investments Limited | Real estate | 2016 |
| N & Y Facilities Ltd | Wholesale & retail | 2017 |
| N a a Limited | Transport & logistics | 2022 |
| N Abbas Car Bodywork Ltd | Wholesale & retail | 2023 |
| N D M Scaffolding Limited | Construction | 2023 |
| N S Nathan Limited | Professional & scientific | 2012 |
| N TEC Solutions Limited | Other services | 2000 |
| N Toor Properties Limited | Real estate | 2022 |
| N Yusuf Limited | Information & communication | 2024 |
| N&H Label Limited | Wholesale & retail | 2017 |
| N&S Consulting Ltd | Real estate | 2024 |
| N.A.K.H Homes Ltd | Real estate | 2024 |
| N.B.E Development Ltd | Construction | 2023 |
| N.K. Fashions Limited | Wholesale & retail | 2004 |
| N.S. Kang Construction Ltd | Construction | 2024 |
| N13 Ltd | Transport & logistics | 2016 |
| N1HOSTING Ltd | Information & communication | 2026 |
| NA Aujla Limited | Transport & logistics | 2024 |
| NA Property Group Ltd | Real estate | 2025 |
| NAA Property Investments Ltd | Real estate | 2025 |
| Naala Properties Ltd | Real estate | 2025 |