| MKA Hospitality Ltd | Hospitality | 2018 |
| MKA Property Management Ltd | Real estate | 2022 |
| MKG Trading Ltd | Wholesale & retail | 2011 |
| MKH Couriers Limited | Transport & logistics | 2019 |
| MKH Property Solutions Ltd | Construction | 2023 |
| Mkhr Property Limited | Education | 2015 |
| MKI Optical Ltd | Health & social care | 2010 |
| MKK Pharm Ltd | Health & social care | 2023 |
| Mkkprop Ltd | Real estate | 2023 |
| MKL Catering Consultants Limited | Hospitality | 1995 |
| Mkln Limited | Manufacturing | 2010 |
| MKN Healthcare Limited | Information & communication | 2022 |
| Mknr Limited | Construction | 2024 |
| Mkwrx Ltd | Information & communication | 2023 |
| MKZ Xpress Ltd | Hospitality | 2022 |
| MKZ67 Ltd | Transport & logistics | 2019 |
| ML Agency Limited | Professional & scientific | 2015 |
| ML Beauty & Aesthetics Training Centre Ltd | Professional & scientific | 2023 |
| ML Installations Ltd | Construction | 2009 |
| ML Joinery and Home Improvement Services Ltd | Manufacturing | 2022 |
| ML Roberts Holdings Limited | Construction | 2020 |
| MLA & Co Property Solutions Ltd | Households | 2026 |
| MLA Property Development Services Ltd | Construction | 2025 |
| MLB Group Holdings Limited | Financial services | 2025 |
| MLB Joinery Limited | Manufacturing | 2015 |
| MLC Advisory Ltd | Administrative & support | 2025 |
| MLC Nottingham LLP | | 2021 |
| Mlcj Services Ltd | Health & social care | 2018 |
| Mlcl Properties Ltd | Real estate | 2020 |
| Mlea Ltd | Health & social care | 2023 |
| Mlehal Ltd | Health & social care | 2021 |
| MLF Holdings Ltd | Real estate | 2025 |
| MLG 365 Ltd | Real estate | 2025 |
| MLM Virgo Property Ltd | Real estate | 2025 |
| MLN Group Ltd | Wholesale & retail | 2018 |
| Mlodzik Property Ltd | Real estate | 2024 |
| MLP Aesthetics Ltd | Other services | 2025 |
| MLS Heating Services Ltd | Construction | 2024 |
| MLV Holdings Limited | Real estate | 2022 |
| MLW Developments Limited | Construction | 2019 |
| MLW Electrical Contractors Limited | Construction | 2020 |
| MM & GK Property LLP | | 2023 |
| MM Four Limited | Administrative & support | 2015 |
| MM Four Property Management Limited | Real estate | 2026 |
| MM Investing Ltd | Real estate | 2024 |
| MM Investment Group Ltd | Real estate | 2024 |
| MM Motors (UK) Limited | Wholesale & retail | 2009 |
| MM Partners Two Ltd | Wholesale & retail | 2020 |
| MM Property Management and Lettings Ltd | Real estate | 2022 |
| MM Property Managment Ltd | Real estate | 2017 |
| MM Rentals Ltd | Real estate | 2022 |
| MM Sweets Ltd | Wholesale & retail | 2025 |
| MM UK Hospitality Limited | Hospitality | 2026 |
| MMF Fire Systems Ltd | Construction | 2020 |
| Mmfn Ltd | Information & communication | 2024 |
| MMH London Ltd | Wholesale & retail | 2021 |
| MMH Property Services Ltd | Real estate | 2025 |
| MMI Salons Limited | Other services | 2024 |
| MMK Cargo Limited | Transport & logistics | 2026 |
| MMK Consultancy Limited | Health & social care | 2016 |
| Mmkm Consultancy Limited | Professional & scientific | 2019 |
| Mmks & Co Limited | Professional & scientific | 2014 |
| Mmluca Ltd | Transport & logistics | 2021 |
| Mmmw Ltd | Wholesale & retail | 2017 |
| MMO Security Services Ltd | Financial services | 2025 |
| Mmoc Special Projects Limited | Construction | 2016 |
| MMR Developments Ltd | Construction | 2023 |
| Mms&Co Limited | Wholesale & retail | 2025 |
| MMT Enterprises Ltd | Administrative & support | 2025 |
| MMV Pharmalocums Ltd | Wholesale & retail | 2022 |
| MMZ Medical Limited | Health & social care | 2025 |
| Mmza Limited | Real estate | 2021 |
| MN Building and Construction Ltd | Construction | 2022 |
| MN Computers Limited | Information & communication | 2012 |
| MN Electrical Contractors Limited | Construction | 2020 |
| MN Production Ltd | Health & social care | 2025 |
| MNA Accounting and Consulting UK Limited | Professional & scientific | 2024 |
| MNA Retail UK Limited | Wholesale & retail | 2024 |
| MNA Trading Ltd | Other services | 2022 |
| MNG Deliveri Ltd | Transport & logistics | 2021 |
| MNK Corporations Limited | Hospitality | 2020 |
| MNM Consulting Limited | Information & communication | 2023 |
| MNM Holdings Ltd | Transport & logistics | 2020 |
| MNM Properties Management Ltd | Households | 2023 |
| Mnsh Group Ltd | Wholesale & retail | 2025 |
| MNT Transport Solutions Limited | Transport & logistics | 2026 |
| MNW Enterprise Limited | Professional & scientific | 2014 |
| MNW Traders Ltd | Wholesale & retail | 2021 |
| MO Homes & Property Ltd | Real estate | 2025 |
| Mo&M Holdings Limited | Real estate | 2024 |
| Mo&M Limited | Information & communication | 2022 |
| Mo's Treats Limited | Wholesale & retail | 2025 |
| Mo-Renovations Ltd | Construction | 2020 |
| MO3 Limited | Information & communication | 2024 |
| Moai Strength & Wellness Limited | Arts & recreation | 2024 |
| Moazzam Motors Ltd | Wholesale & retail | 2022 |
| MOB Admin Support Limited | Administrative & support | 2026 |
| Mobicell Ltd | Information & communication | 2010 |
| Mobile Afro Hairdressers Limited | Other services | 2019 |
| Mobile Blade Barbers Ltd | Other services | 2026 |