| MWT Solicitors Ltd | Professional & scientific | 2009 |
| MX Enterprises Ltd | Extraterritorial | 2007 |
| MXC Solution Limited | Construction | 2025 |
| Mxgn Ltd | Information & communication | 2026 |
| Mxmx Slow Harmony Ltd | Transport & logistics | 2017 |
| MXW Automotive Ltd | Wholesale & retail | 2024 |
| My Abilities ARE Limited | Information & communication | 2026 |
| My Address Barber Ltd | Other services | 2021 |
| My Afro Caribbean Wedding Ltd | Other services | 2018 |
| My Balti Massala Ltd | Hospitality | 2025 |
| My Better Half Ltd | Real estate | 2019 |
| My Body Therapy Ltd | Education | 2024 |
| My Cooking Limited | Hospitality | 2021 |
| My Creative Thoughts Ltd | Professional & scientific | 2018 |
| My Crew Healthcare Limited | Health & social care | 2020 |
| My Drone Survey Ltd | Professional & scientific | 2019 |
| My Eco Loan Limited | Extraterritorial | 2014 |
| My Education Consultant Ltd | Education | 2012 |
| My Event POD Ltd | Information & communication | 2023 |
| My FC Food Ltd | Hospitality | 2019 |
| My Flawless Limited | Wholesale & retail | 2016 |
| My Glow Clinics Limited | Other services | 2025 |
| My Golden PEN Limited | Information & communication | 2022 |
| My Grip Ltd | Wholesale & retail | 2021 |
| My Gym Clobber Limited | Wholesale & retail | 2024 |
| My Hair by Jaydee Limited | Other services | 2025 |
| My Healthy Habits Limited | Wholesale & retail | 2024 |
| My Heating Engineer Limited | Construction | 2017 |
| My Home Nest LLP | | 2021 |
| My Home Rocks Online Limited | Wholesale & retail | 2017 |
| My Home Youir Home Ltd | Real estate | 2025 |
| My Infinity Homes Ltd | Construction | 2021 |
| My Infinity Software Limited | Information & communication | 2024 |
| My Invest Property Ltd | Households | 2021 |
| My Invest Property Running Company Ltd | Households | 2022 |
| My Invest Property Yield Ltd | Households | 2021 |
| My Key Broker Ltd | Real estate | 2026 |
| My Language Centre Ltd | Education | 2018 |
| My Legal Club Limited | Wholesale & retail | 2015 |
| My Licensed Breeder Limited | Administrative & support | 2021 |
| My Little Cafe Ltd | Hospitality | 2025 |
| My Little Takeaway Ltd | Hospitality | 2025 |
| My Liverpool Home Ltd | Wholesale & retail | 2022 |
| My Local Discount Ltd | Wholesale & retail | 2020 |
| My Longevity Ltd | Wholesale & retail | 2021 |
| My Munchies Food Ltd | Hospitality | 2025 |
| My New Place Ltd | Real estate | 2011 |
| My Peshawar Ltd | Hospitality | 2026 |
| My Professional Coach Limited | Administrative & support | 2022 |
| My Properties Liverpool Limited | Real estate | 2021 |
| My Properties NW Ltd | Real estate | 2025 |
| My Pure Services Ltd | Health & social care | 2024 |
| My Radiology Ltd | Health & social care | 2025 |
| My Science Tutor Ltd | Education | 2025 |
| My Smart Properties Limited | Real estate | 2019 |
| My Solutions(Nw) Limited | Real estate | 2016 |
| My Three Guardians Ltd | Manufacturing | 2026 |
| My Treasure Ltd | Wholesale & retail | 2017 |
| My Trusted Trades Ltd | Other services | 2022 |
| My Upper Limb Surgeon Limited | Health & social care | 2019 |
| My Way Land - Karol Stadnik Limited | Professional & scientific | 2017 |
| My Wealth Estate Planning Limited | Financial services | 2004 |
| My Wealth Limited | Extraterritorial | 2014 |
| My Wealth Online Limited | Extraterritorial | 2014 |
| My Wealth Private Limited | Extraterritorial | 2025 |
| My Wellbeing Ltd | Health & social care | 2026 |
| MY3 Limited | Administrative & support | 2016 |
| MYA Rentals Limited | Administrative & support | 2025 |
| Myatt Property Group Ltd | Real estate | 2023 |
| Mycardium AI Limited | Administrative & support | 2022 |
| Mycardium Nominee Limited | Administrative & support | 2023 |
| Mycardium Services Limited | Administrative & support | 2024 |
| Mycrib Ltd | Administrative & support | 2017 |
| Mycrib Management Ltd | Real estate | 2023 |
| Myenergy Solutions Ltd | Construction | 2019 |
| Myers Court Management Limited | Households | 1993 |
| Myers Roofing (NW) Ltd | Construction | 2011 |
| Myerscough NO 2 Limited | Real estate | 2015 |
| Myerscough Property Partnership Limited | Financial services | 2015 |
| Mygemart Ltd | Information & communication | 2019 |
| Myhikeco Ltd | Information & communication | 2026 |
| MYI Rentals Limited | Administrative & support | 2025 |
| MYK Build Ltd | Construction | 2026 |
| Myla Group Ltd | Construction | 2024 |
| Myler & Co Estates Ltd | Real estate | 2003 |
| Myler Lettings Limited | Real estate | 2006 |
| Myles Group Holdings Limited | Financial services | 2025 |
| Myles Property Group Ltd | Real estate | 2024 |
| Myliverpool Ltd | Financial services | 2022 |
| Mylo Properties Ltd | Real estate | 2011 |
| Myma Medical Limited | Professional & scientific | 2020 |
| Mynutrition Ltd | Health & social care | 2025 |
| MYO Architecture Ltd | Professional & scientific | 2020 |
| MYO Nutrition Ltd | Wholesale & retail | 2024 |
| MYP Networking Limited | Other services | 2021 |
| Myriad Mortgage Services Ltd | Financial services | 2006 |
| Myro Technologies Ltd | Information & communication | 2026 |
| Myrona Projects Ltd | Professional & scientific | 2019 |
| Myrtle Street Properties Limited | Real estate | 1995 |
| Myshoez Limited | Wholesale & retail | 2020 |