| Muzac Ltd. | Wholesale & retail | 2012 |
| Muze London Ltd | Wholesale & retail | 2024 |
| Muzz Ltd | Information & communication | 2015 |
| Muzz Social Ltd | Information & communication | 2023 |
| Muzzanas Barakah Limited | Real estate | 2023 |
| MV Business Limited | Wholesale & retail | 2019 |
| MVAK2 Limited | Information & communication | 2016 |
| MVO Smile Limited | Health & social care | 2016 |
| MVS Decor Ltd | Construction | 2019 |
| MVS Services Ltd | Information & communication | 2025 |
| Mvsaless Ltd | Wholesale & retail | 2021 |
| MW Builders Network Limited | Construction | 2018 |
| MW Properties 2024 Ltd | Real estate | 2024 |
| MW Traders LP | | 2021 |
| Mwendo Kasi Ltd | Hospitality | 2023 |
| MWM Nexus Limited | Hospitality | 2025 |
| MWS Capital Ltd | Other services | 2017 |
| MWS London Limited | Real estate | 2023 |
| MWS Security Limited | Professional & scientific | 2018 |
| MWS Trading and Consultancy Limited | Professional & scientific | 2022 |
| MX Plastering Ltd | Construction | 2012 |
| MXA Investments Ltd | Real estate | 2024 |
| Mxtech Limited | Wholesale & retail | 2018 |
| My Accountancy Team Limited | Professional & scientific | 2014 |
| My Allrounder Limited | Construction | 2025 |
| My Allsorts Ltd | Wholesale & retail | 2025 |
| My Big Bird Limited | Hospitality | 2024 |
| My Bubble Bath Ltd | Other services | 2018 |
| My Day Create Ltd | Wholesale & retail | 2019 |
| My Dream Space Project Limited | Administrative & support | 2016 |
| My Esther London Limited | Manufacturing | 2022 |
| My Fashion View Ltd | Wholesale & retail | 2018 |
| My Financial Future Limited | Professional & scientific | 2025 |
| My Forever Keeps Ltd | Wholesale & retail | 2025 |
| My Globe Travel Ltd | Hospitality | 2024 |
| My Hair and Beauty Limited | Extraterritorial | 2011 |
| My Heaven K Ltd | Wholesale & retail | 2026 |
| My Initiative Ltd | Arts & recreation | 2018 |
| My Kebabish Takeaway Ltd | Hospitality | 2026 |
| My Learners Limited | Education | 2025 |
| My Learning Room Limited | Education | 2023 |
| My Little Haven Limited | Information & communication | 2025 |
| My Move Limited | Real estate | 2020 |
| My Music Grades Limited | Education | 2016 |
| My Nest Property Investments Limited | Real estate | 2021 |
| My Nursery LLP | | 2003 |
| My Perfect Little Creations Limited | Arts & recreation | 2022 |
| My Role Ways Ltd | Transport & logistics | 2024 |
| My Shopfittings Limited | Wholesale & retail | 2020 |
| My Smart Hub Ltd | Wholesale & retail | 2026 |
| My Snack BAG Ltd | Wholesale & retail | 2021 |
| My Staff Travel Shop Ltd | Administrative & support | 2023 |
| My Star Portrait Limited | Professional & scientific | 2023 |
| My Store Tech Ltd | Wholesale & retail | 2024 |
| My Technologies Ltd | Information & communication | 2026 |
| My Teck Ltd | Wholesale & retail | 2018 |
| My Tourismo Ltd | Administrative & support | 2023 |
| My Training 4 Skills Ltd | Education | 2023 |
| My Virtual Force Limited | Administrative & support | 2011 |
| My Watch Tracker Ltd | Wholesale & retail | 2023 |
| My Way Transport Ltd | Transport & logistics | 2021 |
| Myan Property Management Ltd | Real estate | 2026 |
| Myautofind Ltd | Information & communication | 2026 |
| Mybiobeauty Limited | Wholesale & retail | 2022 |
| Mycommerce Ltd | Wholesale & retail | 2025 |
| Mydleton Stores Ltd | Wholesale & retail | 2026 |
| Myers Estates Limited | Construction | 2026 |
| Myhome Property Services Limited | Real estate | 2016 |
| MYK Associates Limited | Professional & scientific | 2011 |
| Mykinzy Ltd | Wholesale & retail | 2021 |
| Myla Sparkle Ltd | Wholesale & retail | 2023 |
| Mylocum Group Ltd | Administrative & support | 2016 |
| Mylocum Ltd | Administrative & support | 2004 |
| MYM Enterprise Ltd | Wholesale & retail | 2023 |
| MYM Trading Ltd | Wholesale & retail | 2023 |
| Myme Properties Ltd | Real estate | 2026 |
| Mymerch Limited | Wholesale & retail | 2021 |
| Mynth House Limited | Professional & scientific | 2023 |
| Myoho Consulting Ltd | Information & communication | 2017 |
| Myonlinelawyer Limited | Other services | 2020 |
| Myoz Property Ltd | Real estate | 2017 |
| Mypcdrive Limited | Wholesale & retail | 2024 |
| Mypronatural Ltd | Other services | 2025 |
| Mypronatural Supplements Limited | Hospitality | 2024 |
| Myra Interiors Limited | Professional & scientific | 2025 |
| Myrakon Limited | Professional & scientific | 2024 |
| Myrepost Ltd | Information & communication | 2026 |
| Myriagon Trading Ltd | Wholesale & retail | 2023 |
| Mysar Limited | Wholesale & retail | 2022 |
| Mystic Salons Limited | Other services | 2003 |
| Mystik Rebel Limited | Information & communication | 2024 |
| Mystique (UK) Limited | Hospitality | 2004 |
| Mythily Properties Ltd | Real estate | 2026 |
| Myzi Ltd | Wholesale & retail | 2026 |
| MZ Haulier Ltd | Transport & logistics | 2025 |
| MZ Hub Ltd | Arts & recreation | 2024 |
| MZ Promotional Ltd | Wholesale & retail | 2025 |
| MZ Traders Group Ltd | Wholesale & retail | 2025 |
| MZ22 Ltd | Wholesale & retail | 2025 |
| Mzahid Ltd | Transport & logistics | 2025 |