| MS Mughal Builders Ltd | Construction | 2023 |
| Msaa Enterprise Ltd | Health & social care | 2026 |
| MSF Properties Investment Ltd | Construction | 2019 |
| MSH Lighting Limited | Information & communication | 2011 |
| Msjl Ltd | Construction | 2022 |
| MSK Belgravia Group Holdings Ltd | Financial services | 2026 |
| MSK Belgravia Group Ltd | Health & social care | 2026 |
| MSK Infotech Solutions Limited | Information & communication | 2026 |
| MSK Investment Property Ltd | Real estate | 2020 |
| MSM London Trading Limited | Transport & logistics | 2016 |
| MSN Traders Ltd | Wholesale & retail | 2018 |
| MTF Project Management Ltd | Professional & scientific | 2024 |
| MTS Project Services Ltd | Construction | 2025 |
| Mubarik Halal Meat Ltd | Other services | 2010 |
| Mubeen Trading Ltd | Transport & logistics | 2024 |
| Mubil Builder Ltd | Construction | 2014 |
| Muca Construction Ltd | Construction | 2022 |
| Muca Properties Ltd | Real estate | 2025 |
| Mudanzas Edyta London Limited | Transport & logistics | 2020 |
| Mudh Trading Ltd | Transport & logistics | 2016 |
| Mugg&Bean Cafe Ltd | Hospitality | 2026 |
| Mughal Construction Services Ltd | Construction | 2025 |
| Mughal's Trader Ltd | Hospitality | 2020 |
| MUH Hospitality Limited | Hospitality | 2026 |
| Muhammad Asif Auto Spare Parts UK Ltd | Wholesale & retail | 2022 |
| Muhammad Asim Ltd | Transport & logistics | 2021 |
| Muhammad Wahaj Ltd | Health & social care | 2025 |
| Muharis Trading Ltd | Wholesale & retail | 2025 |
| Multi Zone Impact Ltd | Information & communication | 2017 |
| Multigroup 777 Limited | Transport & logistics | 2020 |
| Multispace Ltd | Construction | 2016 |
| Multiverse Studios CIC | Information & communication | 2026 |
| Muna Medics Limited | Health & social care | 2017 |
| Munchiez London Limited | Hospitality | 2020 |
| Munching Tooting Ltd | Hospitality | 2024 |
| Munco FP Limited | Wholesale & retail | 2011 |
| Mundex Limited | Construction | 2015 |
| Munsif Investments Limited | Real estate | 1998 |
| Murad Trading Ltd | Wholesale & retail | 2012 |
| Muscatis Limited | Information & communication | 2017 |
| Mussiworld Cleaning Service Ltd | Administrative & support | 2025 |
| Muto Traders Ltd | Wholesale & retail | 2022 |
| Muttmeg Limited | Manufacturing | 2024 |
| Muzicana Ltd | Arts & recreation | 2021 |
| Mvpk Ltd | Construction | 2010 |
| MW Painting&Decorating Ltd | Construction | 2024 |
| My & IY Homes Limited | Real estate | 2019 |
| My Old Girl & ME Limited | Wholesale & retail | 2021 |
| My Refresh Limited | Construction | 2020 |
| My Salon IF YOU Don'T Look Good WE Don'T Look Good Ltd | Other services | 2019 |
| My Salon Morden Ltd | Other services | 2020 |
| My Scooter Shop Ltd | Wholesale & retail | 2020 |
| My Slice Ltd | Hospitality | 2021 |
| My Slice Pizza Ltd | Hospitality | 2021 |
| My World Healthcare Limited | Health & social care | 2015 |
| My World Property Limited | Real estate | 2016 |
| Mycareside Limited | Health & social care | 2021 |
| Myhomey Ltd | Real estate | 2022 |
| Myla Projects Ltd | Construction | 2019 |
| Mystic Online Media Limited | Information & communication | 2008 |
| MZ UK Services Limited | Transport & logistics | 2026 |
| MZB Healthcare Limited | Health & social care | 2013 |
| MZB Holds Ltd | Financial services | 2024 |
| MZB Investinorth Properties Ltd | Real estate | 2026 |
| MZB Investment Properties Ltd | Real estate | 2019 |
| N & C D Hardwick Limited | Administrative & support | 2013 |
| N a W Trading Ltd | Transport & logistics | 2019 |
| N Hassan & Co Limited | Health & social care | 2025 |
| N Soomro Ltd | Health & social care | 2023 |
| N&B Beauty Ltd | Other services | 2023 |
| N&Q Ltd | Wholesale & retail | 2010 |
| N.Adigital Ltd | Information & communication | 2016 |
| NA Management & Services Ltd | Professional & scientific | 2025 |
| NA2016 Trading Limited | Transport & logistics | 2020 |
| NAA Holdings Ltd | Real estate | 2021 |
| Naab Retail Solutions Ltd | Wholesale & retail | 2026 |
| Naam Trading Ltd | Transport & logistics | 2021 |
| Naan House Ltd | Manufacturing | 2019 |
| Naaya Khan Limited | Households | 2024 |
| Nagyen Properties & Construction Ltd | Real estate | 2020 |
| Nahaad Trading Ltd | Wholesale & retail | 2025 |
| Nahaan Trading Ltd | Transport & logistics | 2020 |
| Naht Ltd | Health & social care | 2025 |
| NAI Holdings PVT. Ltd | Financial services | 2024 |
| NAI Property Investment PVT. Ltd | Real estate | 2024 |
| NAI Trading PVT. Ltd | Health & social care | 2024 |
| Naifa Limited | Health & social care | 2012 |
| Naila Shah Counselling Ltd | Professional & scientific | 2024 |
| Nailmaster Limited | Other services | 2018 |
| Nainas Collection Ltd | Transport & logistics | 2023 |
| Naiza Khan Projects Limited | Arts & recreation | 2022 |
| Najeeb Trading Limited | Construction | 2022 |
| Najeeb UK Limited | Transport & logistics | 2015 |
| NAM Trading Ltd | Transport & logistics | 2018 |
| Nanodent Technologies Ltd | Professional & scientific | 2020 |
| Napat Community Services Limited | Health & social care | 2024 |
| Narowal Tyre Shop Ltd | Manufacturing | 2025 |
| NAS Empire Ltd | Real estate | 2022 |
| NAS London Trading Ltd | Wholesale & retail | 2019 |
| NAS Trading London Ltd | Transport & logistics | 2019 |