| Lyon Sports Ltd | Manufacturing | 2023 |
| LZ Interior Design Services Ltd | Professional & scientific | 2026 |
| M & a Food & Wine Ltd | Wholesale & retail | 2025 |
| M & F Consulting Ltd | Information & communication | 2012 |
| M & H Foods Ltd | Hospitality | 2023 |
| M & S Bright Solution Ltd | Wholesale & retail | 2018 |
| M & S Education Limited | Education | 2009 |
| M & Sons Construction Group Ltd | Construction | 2026 |
| M a Delaney Ltd | Construction | 2018 |
| M and H Financials Ltd | Financial services | 2026 |
| M Asim Tech Ltd | Wholesale & retail | 2026 |
| M Canillas Healthcare Limited | Health & social care | 2023 |
| M Flaih Limited | Health & social care | 2024 |
| M K Distributors Ltd | Wholesale & retail | 2021 |
| M KAY Properties Ltd | Real estate | 2017 |
| M Opio Ltd | Construction | 2019 |
| M Rosso Ltd | Transport & logistics | 2024 |
| M V Decoration Ltd | Construction | 2022 |
| M V Foods Limited | Real estate | 2012 |
| M&A Sakhi Construction Limited | Construction | 2020 |
| M&D Holdings Ltd | Real estate | 2024 |
| M&E Belmore Limited | Professional & scientific | 2024 |
| M&F Global UK Ltd | Wholesale & retail | 2022 |
| M&Gc Construction Ltd | Construction | 2024 |
| M&H Tailors Ltd | Other services | 2026 |
| M&H.Uk Logistics Ltd | Transport & logistics | 2025 |
| M&J Storage and Transport Limited | Transport & logistics | 2019 |
| M&M Auto Bodyworks Ltd | Wholesale & retail | 2024 |
| M&M Investments Services Limited | Real estate | 2023 |
| M&R Dream Homes Limited | Real estate | 2019 |
| M&S Kingston Limited | Hospitality | 2013 |
| M&S Virtual Vendors Limited | Wholesale & retail | 2024 |
| M-Cubed Research Consulting Ltd | Professional & scientific | 2024 |
| M-Kabelu Incorporated Ltd | Financial services | 2020 |
| M-Technics Performance Limited | Manufacturing | 2019 |
| M. Salih Limited | Wholesale & retail | 2019 |
| M.B.B. Property Investment Ltd | Real estate | 2024 |
| M.B.B. Contractors Ltd | Construction | 2019 |
| M.C.Dalysparks Ltd | Construction | 2020 |
| M.E. Swannell Limited | Wholesale & retail | 1974 |
| M.H & a Ltd | Wholesale & retail | 2018 |
| M.K & Sons Roofing Ltd | Construction | 2024 |
| M.R.Technologyservices Ltd | Information & communication | 2019 |
| M.S. Gill & Sons Investment Properties Limited | Households | 2024 |
| M.S.T. Consultants Ltd | Other services | 2014 |
| M.Sidhu Constructions Ltd | Construction | 2019 |
| M.Zohaib ALI Ltd | Other services | 2026 |
| M1 Autos & Tyres Limited | Wholesale & retail | 2020 |
| M1026 Ltd | Administrative & support | 2020 |
| M11 London Housing Ltd | Real estate | 2022 |
| M13 Builder and Design Limited | Construction | 2023 |
| M13 Collection Limited | Transport & logistics | 2023 |
| M2N2 Engineering Ltd | Professional & scientific | 2017 |
| M3M Real Estate Ltd | Real estate | 2020 |
| M4 Motors Ltd | Wholesale & retail | 2023 |
| M4MALHI Ltd | Transport & logistics | 2026 |
| MA & TS Property Ltd | Real estate | 2026 |
| Maan Freight Services Ltd | Transport & logistics | 2025 |
| Maanu Ltd | Construction | 2025 |
| Maarfy Traders Ltd | Wholesale & retail | 2026 |
| Maat Systems Ltd | Information & communication | 2026 |
| Maatmas Enterprise Limited | Wholesale & retail | 2025 |
| Maaud Limited | Wholesale & retail | 2014 |
| Macecustoms Ltd | Wholesale & retail | 2024 |
| Madan Properties Ltd | Real estate | 2024 |
| Madan Property Holdings Ltd | Real estate | 2026 |
| Maddan Traders Ltd | Wholesale & retail | 2018 |
| Madesimpleai Ltd | Information & communication | 2025 |
| Madhan Accessories Ltd | Wholesale & retail | 2023 |
| Madhan Estates Ltd | Real estate | 2024 |
| Madhanaauk Limited | Wholesale & retail | 2024 |
| Madiks UK Limited | Administrative & support | 2021 |
| Madool Ltd | Wholesale & retail | 2021 |
| Maevin Convenience Store Ltd | Wholesale & retail | 2023 |
| MAF Technology Ltd | Information & communication | 2025 |
| Mafworth Limited | Wholesale & retail | 2011 |
| Magenco Ltd | Information & communication | 2015 |
| Magic Carpenter Limited | Manufacturing | 2022 |
| Magic Graphic Design Limited | Manufacturing | 2013 |
| Magic Point Investment Ltd | Real estate | 2023 |
| Magicwords Daynursery Ltd | Health & social care | 2023 |
| Magna Green Service Limited | Administrative & support | 2022 |
| Magnetic Source Ltd Ltd | Wholesale & retail | 2024 |
| Magnus Interior Ltd | Manufacturing | 2022 |
| Magnus Removal Services Limited | Transport & logistics | 2023 |
| Maha Global Ltd | Real estate | 2018 |
| Mahadev Construction Services Ltd | Construction | 2026 |
| Mahadev Labs Ltd | Information & communication | 2018 |
| Mahais Ltd | Wholesale & retail | 2024 |
| Mahakaal Brickwork Ltd | Construction | 2025 |
| Mahal Estates Ltd | Real estate | 2018 |
| Mahamaya Foods Ltd | Hospitality | 2019 |
| Mahb Enterprises Limited | Real estate | 2025 |
| Maher Leather Ltd | Wholesale & retail | 2021 |
| Mahi Clothing Ltd | Wholesale & retail | 2025 |
| Mahil Construction Ltd | Construction | 2024 |
| Main Baker Electrical Ltd | Construction | 2023 |
| Maison Fardi Ltd | Wholesale & retail | 2025 |
| Majestic Technologies Ltd | Information & communication | 2020 |
| Majha Construction Ltd | Construction | 2021 |