| Motorize UK (PVT) Ltd | Wholesale & retail | 2025 |
| Mouille Limited | Wholesale & retail | 2008 |
| Mount Aksum Tabernacle CIC | Other services | 2023 |
| Mount Concept Ltd | Construction | 2022 |
| Mousa Capital Holdings Ltd | Real estate | 2025 |
| Moustafa Alkazzaz Ltd | Health & social care | 2022 |
| Move to Improve Ltd | Professional & scientific | 2019 |
| Move-In Limited | Construction | 1985 |
| Movement Management UK Ltd | Professional & scientific | 2024 |
| Moventra Group Limited | Arts & recreation | 2020 |
| Movie Makers Club Limited | Information & communication | 2019 |
| Moycullen Plumbing and Heating Ltd | Construction | 2022 |
| Mozrest Limited | Information & communication | 2020 |
| MP Luxury Travel Services Ltd | Administrative & support | 2021 |
| MPH Partners Limited | Real estate | 2021 |
| MPH2 Limited | Real estate | 2021 |
| Mpik Ltd | Financial services | 2020 |
| Mproperformance Ltd | Health & social care | 2023 |
| MPS Consulting Limited | Professional & scientific | 2023 |
| MPV Properties Limited | Real estate | 2010 |
| MPW Contractor Ltd | Construction | 2022 |
| MQ Contractors Ltd | Professional & scientific | 2024 |
| MQ Stone Ltd | Wholesale & retail | 2023 |
| MQS Property Limited | Real estate | 2025 |
| MR Adam's Barbers Limited | Other services | 2016 |
| MR and MRS Soni Ltd | Real estate | 2024 |
| MR AR Barbers Ltd | Other services | 2024 |
| MR Auto Cars Ltd | Wholesale & retail | 2019 |
| MR Blueflame Heating Ltd | Construction | 2023 |
| MR Crazy Nutrition Ltd | Hospitality | 2024 |
| MR Fish Wholesale Ltd | Wholesale & retail | 2024 |
| MR Floral Limited | Wholesale & retail | 2020 |
| MR Green London Ltd | Wholesale & retail | 2015 |
| MR Masalas Ltd | Hospitality | 2019 |
| MR Mole Consulting Ltd | Manufacturing | 2025 |
| MR Prime Motors Limited | Wholesale & retail | 2026 |
| MR Rapid Recovery & Storage Ltd | Wholesale & retail | 2017 |
| MR Tankers Holdco Limited | Transport & logistics | 2024 |
| MR Wash Limited | Construction | 2023 |
| Mraco Consultancy Limited | Professional & scientific | 2026 |
| Mrcmrodriguezjr Ltd | Health & social care | 2023 |
| Mrfix Solution Ltd | Construction | 2026 |
| Mritika Systems Limited | Information & communication | 2022 |
| MRR Trans Ltd | Transport & logistics | 2023 |
| MRS Residential Limited | Hospitality | 2023 |
| MS & Co Investments Ltd | Real estate | 2025 |
| MS 108 Limited | Real estate | 2026 |
| MS 777 Estates Ltd | Real estate | 2024 |
| MS Building Construction Services Limited | Construction | 2025 |
| MS Digital Consultancy Limited | Professional & scientific | 2017 |
| MS Maki Ltd | Hospitality | 2025 |
| MS Shop Limited | Wholesale & retail | 2024 |
| Ms-Analytics Ltd | Financial services | 2022 |
| MSA Services Limited | Other services | 2015 |
| Msar Developments Ltd | Construction | 2023 |
| Msar Estate Ltd | Construction | 2026 |
| Msar Management Ltd | Construction | 2024 |
| Msar Properties Ltd | Construction | 2026 |
| MSC Fire Engineering Ltd | Public administration | 2020 |
| MSC Fire Holdco Limited | Financial services | 2025 |
| Mscostruction Ltd | Construction | 2026 |
| MSK Limited | Real estate | 2025 |
| MSK Mini Market Limited | Wholesale & retail | 2020 |
| MSL Fenestration Ltd | Construction | 2022 |
| MSM Arena Hotel Limited | Hospitality | 2023 |
| MSM Driving School Ltd | Wholesale & retail | 2022 |
| MSM Media-Tech Limited | Information & communication | 2025 |
| MSM Prime Properties Ltd | Real estate | 2026 |
| Mspr Ltd | Hospitality | 2022 |
| MSR Auto Group Ltd | Wholesale & retail | 2023 |
| MSR Saloon Ltd | Other services | 2025 |
| Mstrdirect Ltd | Wholesale & retail | 2019 |
| MSV Management Services Co Ltd | Real estate | 2026 |
| MSV Properties Partnership LLP | | 2025 |
| MT Mount Properties Limited | Real estate | 2022 |
| Mt&As Ltd | Health & social care | 2019 |
| MTD New Built Ltd | Construction | 2025 |
| Mtdp Limited | Construction | 2025 |
| MTR Entertainment Limited | Wholesale & retail | 2017 |
| Muay Thai Challenge Ltd | Wholesale & retail | 2022 |
| Mufasa Global Limited | Wholesale & retail | 2025 |
| Muhammad Ishaq Ltd | Wholesale & retail | 2025 |
| Muhilan Limited | Information & communication | 2004 |
| Mukhles Ltd | Wholesale & retail | 2017 |
| Mukta Properties Ltd | Real estate | 2021 |
| Muktanand Limited | Wholesale & retail | 2025 |
| Mulgrave Wealth Management Limited | Construction | 2021 |
| Mulji Brothers LLP | | 2021 |
| Mullai Products Ltd | Wholesale & retail | 2014 |
| Multi Asset Klasse Ltd | Real estate | 2024 |
| Multichoice Business Limited | Wholesale & retail | 2014 |
| Multidrop Courier Ltd | Transport & logistics | 2003 |
| Multilines Commercial Limited | Construction | 2014 |
| Multilines Interiors Ltd | Construction | 2019 |
| Multilingualvacancies.Com Limited | Administrative & support | 2003 |
| Multishade Limited | Wholesale & retail | 2014 |
| Mumbai Dosa Limited | Hospitality | 2024 |
| Mumbai Integrated SEZ Limited | | 2001 |
| Mummy Snacks Ltd | Manufacturing | 2017 |
| Mummysmess Limited | Manufacturing | 2021 |