| Luxmoto Limited | Wholesale & retail | 2025 |
| Luxmy Food Store Limited | Wholesale & retail | 2006 |
| Luxmy Property Limited | Real estate | 2018 |
| Luxstone Interiors Limited | Wholesale & retail | 2023 |
| Luxur Homes Ltd | Real estate | 2024 |
| Luxury Dollz DR Ltd | Administrative & support | 2022 |
| Luxury Klean Services Ltd | Administrative & support | 2025 |
| Lwyd Investments Limited | Real estate | 2023 |
| Lyn-Kew Medical Ltd. | Health & social care | 2017 |
| Lyness Accountancy Practice Limited | Professional & scientific | 2014 |
| M & C Aston Property Ltd | Real estate | 2025 |
| M & C Tool Repairs Ltd | Manufacturing | 2017 |
| M & K Housing Ltd | Health & social care | 2025 |
| M & MT Healthcare Limited | Health & social care | 2013 |
| M Gidman Plasterers Limited | Construction | 2021 |
| M J Builders Services Limited | Manufacturing | 2015 |
| M J C Motors Ltd | Wholesale & retail | 1998 |
| M Kaur Pharmaceutics Ltd | Health & social care | 2024 |
| M N Khan Properties Ltd | Real estate | 2024 |
| M P & C Investments Ltd | Real estate | 2006 |
| M S Bar and Grill Ltd | Hospitality | 2019 |
| M T Couriers Ltd | Transport & logistics | 2024 |
| M Yadav Properties Ltd | Real estate | 2026 |
| M&B Attires/Hair Empire Limited | Wholesale & retail | 2025 |
| M&F Face Ltd | Real estate | 2019 |
| M&H Lion Trading Ltd | Wholesale & retail | 2020 |
| M&S Event Services Ltd | Other services | 2008 |
| M.C. Barnett Co Ltd | Extraterritorial | 2017 |
| M.Stachniak Ltd | Construction | 2021 |
| M.W Engineering & Body Repairs Ltd | Manufacturing | 2024 |
| M2SR Limited | Wholesale & retail | 2026 |
| MA Transport WM Ltd | Transport & logistics | 2024 |
| Maan Transport Midlands Ltd | Transport & logistics | 2020 |
| Maaz Business Ltd | Wholesale & retail | 2025 |
| MAC Innovative Limited | Wholesale & retail | 2023 |
| MAC Maciej Zajac Ltd | Construction | 2018 |
| Macrotrans Ltd | Transport & logistics | 2018 |
| Made in Italy Direct Limited | Wholesale & retail | 2018 |
| Madem Trans Ltd | Transport & logistics | 2019 |
| Magee a Limited | Wholesale & retail | 2015 |
| Magic Building Ltd | Construction | 2026 |
| Magnum Opus Trade Ltd | Wholesale & retail | 2026 |
| Mahajan Wholesale Ltd | Wholesale & retail | 2026 |
| Mahal Horizon Holdings Ltd | Real estate | 2024 |
| Mahal Transportation Ltd | Transport & logistics | 2025 |
| Mahi Contracts Limited | Construction | 2025 |
| Maide 2 Shine Ltd | Administrative & support | 2021 |
| Maieco Ltd | Professional & scientific | 2026 |
| Majha Malwa Ltd | Hospitality | 2026 |
| Major Trans Ltd | Transport & logistics | 2025 |
| Make ME Fit Club Group C.I.C. | Health & social care | 2022 |
| Makeupooint Ltd | Wholesale & retail | 2021 |
| Makewaydevelopments Ltd | Construction | 2019 |
| Malhi Electrical Contractors Ltd | Construction | 2025 |
| Malhi Stairs U.K. Ltd | Manufacturing | 2025 |
| Malone M Limited | Wholesale & retail | 2014 |
| Maloney & Chibbs Properties Ltd | Real estate | 2025 |
| Malta Tiling Ltd | Construction | 2025 |
| Malverumb Recycling Ltd | Water & waste | 2023 |
| Malwai Transport Ltd | Transport & logistics | 2020 |
| Mamba Corp Ltd | Construction | 2022 |
| Mandla Foods Ltd | Wholesale & retail | 2016 |
| Mandungu Limited | Financial services | 2016 |
| Mango Automotive Trading Ltd | Wholesale & retail | 2025 |
| Manhattan Estates & Property Ltd | Real estate | 2025 |
| Mann Convenience Ltd | Wholesale & retail | 2020 |
| Mann Management Limited | Professional & scientific | 2016 |
| Mann Properties and Developments Limited | Real estate | 2003 |
| Mann Property Limited | Real estate | 2015 |
| Manoj Transport Ltd | Transport & logistics | 2015 |
| Mansgrove Properties Limited | Real estate | 2018 |
| Manstone Resources PLC | Mining & quarrying | 2017 |
| Manufacturing Excellence Partners Limited | Extraterritorial | 2026 |
| Manzar Properties Limited | Construction | 2025 |
| Mapn Ltd | Wholesale & retail | 2017 |
| Mara Building Maintenance Limited | Construction | 2019 |
| Mara Car Wash Limited | Administrative & support | 2025 |
| Maraux Limited | Health & social care | 2013 |
| Marcel 14 Ltd | Transport & logistics | 2015 |
| Marco Pierre Property Limited | Real estate | 2022 |
| Marek Cieslik Ltd | Transport & logistics | 2016 |
| Margab Trailers Ltd | Wholesale & retail | 2023 |
| Marin Courier Ltd. | Transport & logistics | 2016 |
| Marius Express Ltd | Transport & logistics | 2017 |
| Mariyamkhan Ltd | Wholesale & retail | 2026 |
| Mark Holloway Limited | Transport & logistics | 2013 |
| Mark Leach Asset Management Limited | Financial services | 2015 |
| Mark Leach Consulting Limited | Financial services | 2011 |
| Marketing EYE Global Limited | Information & communication | 2014 |
| Marks & MAX Logistics Ltd | Manufacturing | 2019 |
| Marku Brothers Construction Ltd | Construction | 2025 |
| Maro-X Limted Limited | Hospitality | 2011 |
| Martek Motor Services Limited | Wholesale & retail | 2004 |
| Martini PIO Transport Ltd | Transport & logistics | 2022 |
| Masenga Holdings Ltd | Real estate | 2020 |
| Masih Ltd | Real estate | 2020 |
| Mason C Limited | Wholesale & retail | 2025 |
| Massey's Cafe Ltd | Hospitality | 2026 |
| Masterfreight Limited | Transport & logistics | 2002 |
| Masters Diagnostics Limited | Professional & scientific | 2021 |