| Mistre Limited | Wholesale & retail | 2025 |
| Mistreanu Ltd | Real estate | 2024 |
| Mitchell Memorial Youth Arts Centre Ltd | Arts & recreation | 2007 |
| Mitechnologyy Ltd | Other services | 2025 |
| Mitheldan Limited | Financial services | 2019 |
| Mithulan Ltd | Wholesale & retail | 2025 |
| Mitovitality Limited | Manufacturing | 2025 |
| Mitthus Limited | Real estate | 2016 |
| Mitwi Vehicles Ltd | Transport & logistics | 2025 |
| Miyagi-Do-Koi Ltd | Wholesale & retail | 2025 |
| Miyana's Kitchen Ltd | Hospitality | 2025 |
| Mizaz Solutions Ltd | Transport & logistics | 2021 |
| MJ Apex Ltd | Wholesale & retail | 2026 |
| MJ Properties UK 2015 Ltd | Real estate | 2016 |
| MJ Stoke Ltd | Real estate | 2024 |
| MJ Supplies Ltd | Construction | 2023 |
| MJB Hall Services Ltd | Construction | 2021 |
| MJB Profiles Limited | Wholesale & retail | 2020 |
| MJB Shopfitting & Joinery Ltd | Construction | 2023 |
| Mjch Electrical Specialist Limited | Manufacturing | 2025 |
| MJE (S&T) Ltd | Construction | 2022 |
| MJG Arts Ltd | Professional & scientific | 2020 |
| Mjhrecruitment Solutions Limited | Administrative & support | 2006 |
| MJK Stores Ltd | Wholesale & retail | 2026 |
| MJL Site Services Ltd | Construction | 2019 |
| MJM Air Conditioning Limited | Manufacturing | 2015 |
| MJM Collections Limited | Wholesale & retail | 2026 |
| MJM Motor Service Sales Limited | Wholesale & retail | 2023 |
| MJR GAS Services Limited | Construction | 2008 |
| MJR Mortgage and Protection Solutions Ltd | Financial services | 2021 |
| MJS Blackshaw Investments Limited | Financial services | 2026 |
| MJS Car Sales Limited | Wholesale & retail | 2016 |
| MJS Transport (UK) Limited | Transport & logistics | 2012 |
| Mjsdrive Ltd | Transport & logistics | 2023 |
| MJW90 Properties Ltd | Real estate | 2025 |
| MK Legacy Homes Limited | Real estate | 2025 |
| MK Legalisation and Consular Services Limited | Other services | 2025 |
| MK Projects Limited | Construction | 2025 |
| MK Sterling Limited | Wholesale & retail | 2025 |
| MKB Guttering Ltd | Construction | 2024 |
| Mkbal Ltd | Health & social care | 2025 |
| MKC Motor Group Limited | Administrative & support | 2017 |
| MKD Transport Limited | Transport & logistics | 2019 |
| MKG Accountancy Ltd | Extraterritorial | 2011 |
| MKG Recovery Holdings Ltd | Health & social care | 2025 |
| Mktechserv Limited | Professional & scientific | 2020 |
| MKY Properties Ltd | Construction | 2022 |
| ML Engineering Ltd | Professional & scientific | 2025 |
| ML Motors Stoke Ltd | Wholesale & retail | 2025 |
| ML Property Investors Ltd | Real estate | 2024 |
| Mlangeni 2025 Ltd | Health & social care | 2025 |
| MLB Holdings (UK) Ltd | Real estate | 2016 |
| MLH Capital Ltd | Wholesale & retail | 2025 |
| Mlhl Holdings Ltd | Financial services | 2024 |
| Mluk Ltd | Professional & scientific | 2026 |
| MM Bagnall Refractories Limited | Manufacturing | 2002 |
| MM Codes Ltd | Wholesale & retail | 2025 |
| MM Properties Investment Ltd | Real estate | 2025 |
| MM Yasin Private Limited | Hospitality | 2014 |
| MM10 Properties Limited | Real estate | 2018 |
| MM27 Properties Limited | Extraterritorial | 2024 |
| MMA Logistics Group Ltd | Transport & logistics | 2026 |
| MMB Homes Ltd | Real estate | 2021 |
| MME Restorations Limited | Wholesale & retail | 2018 |
| MMM Engineering Limited | Professional & scientific | 2025 |
| MMO Enterprise Ltd | Real estate | 2024 |
| Mmotorcars Ltd | Wholesale & retail | 2024 |
| MN Noble Practitioner Services Ltd | Health & social care | 2023 |
| MNB Property Management Limited | Real estate | 2017 |
| MNS Tropicals Limited | Wholesale & retail | 2025 |
| Mobias Ltd | Information & communication | 2017 |
| Mobile -BAA- Bar Ltd | Hospitality | 2022 |
| Mobile Hub Longton Ltd | Wholesale & retail | 2025 |
| Mobile Hub SOT Ltd | Wholesale & retail | 2024 |
| Mobile Hub ST Ltd | Manufacturing | 2023 |
| Mobile IT Ltd | Information & communication | 2023 |
| Mobile Shopping Ltd | Wholesale & retail | 2024 |
| Mobile Vehicle Repairs Ltd | Wholesale & retail | 2023 |
| Mobilefone Solutionz Ltd | Other services | 2026 |
| Mobrite Ltd | Administrative & support | 2017 |
| MOD Life Crisis Limited | Extraterritorial | 2016 |
| Mode Developments Limited | Real estate | 2019 |
| Model Y Projects Limited | Real estate | 2021 |
| Modern & TEC Ltd | Wholesale & retail | 2025 |
| Modern Bricks Property Ltd | Real estate | 2022 |
| Modern Stays Limited | Real estate | 2023 |
| Modern Timberworks Ltd | Manufacturing | 2019 |
| Modesty by Aisha Ltd | Wholesale & retail | 2020 |
| Modesty by Haya Ltd | Wholesale & retail | 2026 |
| Modus Safety Solutions Ltd | Administrative & support | 2021 |
| Mogul International Trade Ltd | Wholesale & retail | 2018 |
| Mohgoub Locum Services Limited | Health & social care | 2015 |
| Moir Aesthetics Ltd | Other services | 2024 |
| Mojos Restaurant Limited | Hospitality | 2017 |
| Molo Transport Ltd | Transport & logistics | 2018 |
| Momentum Properties Solution Ltd | Real estate | 2025 |
| Momin Food Stoke Ltd | Wholesale & retail | 2024 |
| Mona Kasteel Ltd | Hospitality | 2019 |
| Monarchh Ltd | Wholesale & retail | 2026 |
| Mondres Ltd | Information & communication | 2024 |