| Modesty Living Ltd | Wholesale & retail | 2023 |
| Moeen Petroleum Service Limited | Wholesale & retail | 2025 |
| MOG Asum Ltd | Hospitality | 2026 |
| Mohair Magic Design Limited | Manufacturing | 2011 |
| Mohan & Sushma Limited | Hospitality | 1999 |
| Mohina Consultancy Limited | Information & communication | 2014 |
| Mohit Jhanji Consultancy Ltd | Real estate | 2025 |
| MOI Lavish Moroccan Hammam Ltd | Other services | 2025 |
| Mokone Limited | Health & social care | 2014 |
| Mokshitech Limited | Information & communication | 2021 |
| Molas Solutions Ltd | Construction | 2026 |
| Moldtelecom Ltd | Information & communication | 2026 |
| Molleti Homes Limited | Real estate | 2020 |
| Molotr & Molotr Properties Ltd | Real estate | 2024 |
| Momi Foods Ltd | Hospitality | 2016 |
| Momin Khan Ltd | Wholesale & retail | 2025 |
| Momo Heads Ltd | Hospitality | 2023 |
| Monal Consultancy Ltd | Health & social care | 2019 |
| Monarch Projects Ltd | Real estate | 1999 |
| Monarchis Limited | Construction | 2025 |
| Monark Estates Ltd | Real estate | 2020 |
| Monbook Accounts Ltd | Real estate | 2026 |
| Monex Logistics Limited | Transport & logistics | 2023 |
| Money Matters Management Ltd | Professional & scientific | 2024 |
| Moni Building Ltd | Construction | 2022 |
| Monid UK Ltd | Information & communication | 2019 |
| Monika Properties Ltd | Real estate | 2016 |
| Moniz (Hounslow) Limited | Hospitality | 2019 |
| Monk International Limited | Professional & scientific | 2019 |
| Monstar Vibe Ltd | Agriculture & fishing | 2019 |
| Montana Barbers Ltd | Other services | 2018 |
| Montluis Ltd | Wholesale & retail | 2023 |
| Monty Malwa Barbers Limited | Other services | 2023 |
| Morantec Limited | Construction | 2020 |
| More Hands Health Care Services Limited | Health & social care | 2024 |
| Morgan AC Services Ltd | Construction | 2021 |
| Morningstar PVT Ltd | Real estate | 2026 |
| Moroccan Taste Limited | Hospitality | 2026 |
| Morpheus Red Ltd | Real estate | 2024 |
| Morwin Distribution Ltd | Wholesale & retail | 2026 |
| Morya Fine Foods Co Ltd | Hospitality | 2026 |
| Mosaic Games Limited | Arts & recreation | 2018 |
| Mosha Trading Limited | Wholesale & retail | 2020 |
| Moshein Trading Ltd | Wholesale & retail | 2023 |
| Mosolo Ltd | Administrative & support | 2001 |
| Moti Commercial Investments Limited | Real estate | 2024 |
| Moto Village Ltd | Wholesale & retail | 2024 |
| Motor Care Specialists Limited | Wholesale & retail | 2026 |
| Motor Heaven Ltd | Wholesale & retail | 2024 |
| Motor Network Ltd | Wholesale & retail | 2024 |
| Motors Paint & Repair Ltd | Wholesale & retail | 2024 |
| Mott Macdonald SA Limited | Professional & scientific | 1982 |
| Motvs Ltd | Wholesale & retail | 2025 |
| Mount Olivet Enterprises Limited | Wholesale & retail | 2025 |
| Mountic Limited | Other services | 2021 |
| Moustache Waitressing for YOU Ltd | Hospitality | 2019 |
| Move Inn Estates Iver Ltd | Real estate | 2021 |
| Move Inn Estates Limited | Real estate | 2011 |
| Move Inn Estates Sales Ltd | Real estate | 2017 |
| Move Inn Godstone Limited | Real estate | 2026 |
| Move Inn Northfields Management Ltd | Real estate | 2026 |
| Movers for Move and Storage Ltd | Transport & logistics | 2023 |
| Movra Logistics Ltd | Transport & logistics | 2025 |
| MP Logistics & Delivery Limited | Transport & logistics | 2026 |
| MP Plumbing and Drainage Ltd | Construction | 2021 |
| MPR Solicitors LLP | | 2007 |
| MPROM1 Limited | Real estate | 2024 |
| MPROM2 Limited | Real estate | 2024 |
| MR Brar Ltd | Transport & logistics | 2025 |
| MR Exotic Ltd | Hospitality | 2025 |
| MR J Heathrow Limited | Wholesale & retail | 2026 |
| MR Marwa Trading Ltd | Wholesale & retail | 2016 |
| MR Pineapple Ltd | Wholesale & retail | 2025 |
| MR Singh Brickwork Ltd | Construction | 2023 |
| MR Statom Limited | Construction | 2025 |
| MR Structural Ltd | Construction | 2019 |
| MR. Chem Education Limited | Information & communication | 2015 |
| MR. V Grill Ltd | Hospitality | 2023 |
| Mr.Mal Limited | Hospitality | 2026 |
| MR1 Ltd | Hospitality | 2019 |
| MR12 Restaurants Ltd | Hospitality | 2026 |
| MR7 Traders Ltd | Wholesale & retail | 2025 |
| Mrelino Ltd | Administrative & support | 2025 |
| MRH Properties Limited | Construction | 2012 |
| Mridula Sharma Limited | Health & social care | 2014 |
| MRJ Courier Limited | Wholesale & retail | 2025 |
| MRN Trading Limited | Wholesale & retail | 2012 |
| MRS Catering Services Ltd | Hospitality | 2023 |
| MRS Investments Limited | Hospitality | 2007 |
| MRS7 Ltd. | Information & communication | 2015 |
| Mrssk Properties Ltd | Real estate | 2025 |
| Mruu Ltd | Construction | 2026 |
| MRW Medical Services Ltd | Health & social care | 2010 |
| Mrzzi Ltd | Wholesale & retail | 2025 |
| MS Ahuja Properties Ltd | Real estate | 2023 |
| MS Constructions (London) Ltd | Construction | 2024 |
| MS LUX Ltd | Transport & logistics | 2025 |
| MS RAO Properties Ltd | Real estate | 2025 |
| MS Residential Rentals Limited | Real estate | 2024 |
| MSA Care Ltd | Health & social care | 2024 |