| Musharaf Asghar Ltd | Administrative & support | 2023 |
| Mushi Traders Limited | Wholesale & retail | 2022 |
| Mushi Travels Ltd | Transport & logistics | 2023 |
| Musicweaver Limited | Professional & scientific | 2023 |
| Musk Quran Project CIC | Education | 2022 |
| Muslim Burial Welfare Ltd | Other services | 2025 |
| Muso Communications Limited | Information & communication | 2015 |
| Musso Media House Limited | Administrative & support | 2020 |
| Must Gowith Ltd | Wholesale & retail | 2023 |
| Mustangmed Ltd | Health & social care | 2024 |
| Mutambirwa IAG Ltd | Health & social care | 2019 |
| Muzblox Mobile Ltd | Information & communication | 2026 |
| MW Therapy Ltd | Administrative & support | 2022 |
| MWM Commercial (UK) Ltd | Households | 2018 |
| MWM Commercial Investments (UK) Ltd | Real estate | 2023 |
| MWN5 Properties Ltd | Construction | 2025 |
| Mwuk Properties Limited | Real estate | 2013 |
| MXB Consulting Limited | Professional & scientific | 2020 |
| My Big Escape Limited | Arts & recreation | 2009 |
| My Biggest FAN Ltd | Information & communication | 2025 |
| My Cloud Media Limited | Administrative & support | 2011 |
| My Cravings Desserts Ltd | Wholesale & retail | 2025 |
| My Doctor Shop Limited | Professional & scientific | 2010 |
| My Eco Space Group Limited | Construction | 2017 |
| My Estate Ltd | Real estate | 2025 |
| My Green Networks Limited | Professional & scientific | 2025 |
| My Home VET Ltd | Professional & scientific | 2020 |
| My Homestar UK Ltd | Wholesale & retail | 2024 |
| My Ideal Space Limited | Real estate | 2022 |
| My Kashmir Kitchen Ltd | Hospitality | 2025 |
| My Lyft Limited | Transport & logistics | 2024 |
| My Management Accountant Limited | Professional & scientific | 2011 |
| My Next Sofa Ltd | Wholesale & retail | 2025 |
| My PAL and Yours Collective Ltd | Education | 2025 |
| My Scent Store Limited | Wholesale & retail | 2023 |
| My Sheikh Online Ltd | Public administration | 2021 |
| My Silver Shop Ltd | Other services | 1998 |
| My Store Enterprise Ltd | Wholesale & retail | 2023 |
| My Urban Green Company Limited | Wholesale & retail | 2019 |
| My-A-Park Limited | Other services | 2012 |
| Myers Builders Merchants Ltd | Wholesale & retail | 2012 |
| Myers Building Supplies Ltd | Wholesale & retail | 1973 |
| Myers Group 1959 Ltd | Professional & scientific | 1947 |
| Myers Group Holdings Ltd | Extraterritorial | 1994 |
| Myers Skips Ltd | Water & waste | 2012 |
| Myers Timber Ltd | Wholesale & retail | 2012 |
| Myfingz Limited | Wholesale & retail | 2024 |
| Myhe Developments Ltd | Real estate | 2022 |
| Mykanada Limited | Hospitality | 1981 |
| Mykonstruct Ltd | Construction | 2026 |
| Mylo 1 Limited | Professional & scientific | 2022 |
| MYN Enterprise Ltd | Hospitality | 2025 |
| Myproperty (Sales) Limited | Real estate | 2007 |
| Myran's Bakery Limited | Wholesale & retail | 2020 |
| Myriad Monitor Ltd | Information & communication | 2026 |
| Myrtle Gund Ltd | Professional & scientific | 2010 |
| Myrtle Gund Wealth Management Ltd | Professional & scientific | 2013 |
| Mystique International Ltd | Wholesale & retail | 2024 |
| Myuklaw Group Limited | Financial services | 2020 |
| Myuklaw Limited | Professional & scientific | 2016 |
| Myukvisaspro Limited | Information & communication | 2020 |
| Mywellness Limited | Health & social care | 2026 |
| MZ 330 Limited | Wholesale & retail | 2020 |
| MZ Invest Ltd | Hospitality | 2024 |
| Mza-It Ltd | Information & communication | 2026 |
| Mzas Smart Services Limited | Administrative & support | 2018 |
| N & T Life Sciences Limited | Administrative & support | 2023 |
| N a Taylor Ltd | Administrative & support | 2014 |
| N Akhtar Limited | Professional & scientific | 2006 |
| N Brook Ltd | Professional & scientific | 2009 |
| N J Accountancy Services Limited | Professional & scientific | 2017 |
| N K Holmfirth Ltd | Health & social care | 2016 |
| N M B Electrical Services Ltd | Construction | 2015 |
| N P Gardening Services Ltd | Administrative & support | 2024 |
| N V V Projects Limited | Construction | 2021 |
| N.A.H. Joiners Limited | Construction | 2003 |
| N.F Pharma Ltd | Health & social care | 2022 |
| N.J. LEE Limited | Construction | 1979 |
| N20 Concepts Limited | Professional & scientific | 2022 |
| N22 Customs Ltd | Wholesale & retail | 2021 |
| Nabbs Lane Ltd | Real estate | 2026 |
| Nabeel.Hussain Ltd | Health & social care | 2013 |
| Nabpropertiesuk Limited | Real estate | 2024 |
| Nabulsi Logistics Ltd | Transport & logistics | 2022 |
| Nadeem Capital Limited | Financial services | 2025 |
| Nadeem Property SPV Limited | Real estate | 2025 |
| Nadia a Ltd | Health & social care | 2023 |
| Nadir Traders Ltd | Wholesale & retail | 2023 |
| Nadiya Limited | Health & social care | 2010 |
| Nads & Sunny .UK Ltd | Wholesale & retail | 2025 |
| Nadura Wellness Ltd | Wholesale & retail | 2026 |
| Nailed IT Fencing & Decking Ltd | Construction | 2020 |
| Nails by Danielle Ltd | Other services | 2025 |
| Nailtec Limited | Other services | 2008 |
| Naim Stores Ltd | Wholesale & retail | 2019 |
| Naim Stores Property LLP | | 2022 |
| Nais Base Ltd | Wholesale & retail | 2022 |
| Najjo Limited | Hospitality | 2025 |
| Naked Flame Eco-Tubs Ltd | Manufacturing | 2014 |
| Nala Chiropractic Ltd | Health & social care | 2026 |